CN100472233C - Optical pickup lens - Google Patents
Optical pickup lens Download PDFInfo
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- CN100472233C CN100472233C CNB2006101388768A CN200610138876A CN100472233C CN 100472233 C CN100472233 C CN 100472233C CN B2006101388768 A CNB2006101388768 A CN B2006101388768A CN 200610138876 A CN200610138876 A CN 200610138876A CN 100472233 C CN100472233 C CN 100472233C
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Abstract
An objective lens for use in an optical pickup apparatus for conducting recording and/or reproducing information for an optical information recording medium, has a lens section shaped in an approximate circle and including a flange section; and a projecting section integrally provided to the lens section. The objective lens satisfies the following conditional formulas: 0.5<=A<=2.0, 0.3A<=B<=0.7A where A is a diameter (mm) of the lens section when the lens section is viewed from an direction of an optical axis, and B is a width (mm) of the projecting section when the connecting section is viewed from the direction of the optical axis.
Description
The present invention is that the name submitted on July 31st, 2002 is called the dividing an application of No. 02127404.5 patented claim of " optical pickup lens ".
Technical field
The present invention mainly relates to use laser beam to read information from recording medium, and the CD that perhaps is used to the to write down invention of pick-up lens particularly relates to very small-sized CD pick-up lens.
Background technology
In the information recording carrier of selling in the market, various forms (standard) are arranged, each standard is adopted various technology, and among some is also inquiring into.
Particularly become the broadband era recently, for the high capacity content of the image that circulates, animation, sound etc., even domestic consumer also produces the requirement that needs the deposit Large Volume Data.
And, the recording medium of using as such data reserve, the audio cassette of utilizing since the past is arranged, till now also at widely used FD (floppy disk), but recently, Zip (capacity is the high capacity floppy disk of 100M～200M), MO (capacity is the photomagneto disk of 640M～2.3G), CD (CD of capacity 640M～700M), DVD (CD of capacity 4.7G) etc. have begun high capacity.
And, in these recording mediums, utilize the device of the form of light all to have special-purpose separately optical system respectively.
In the above-mentioned CD, music CD is its starting point, but the DVD that becomes now main flow is gradually then needed often to consider exchange with CD, and also has the big and problem of machine of being difficult to provide small-sized and so on of size.Though the modification medium of the medium of the small-sized 8cm size that is used to address this problem, name card size etc. has occurred, the minimizing of capacity then can't be avoided.
In addition, DVD is about the standard confusion of information record, has insufficient and so on the problem of the interchangeability of each standard room.
In addition, about photomagneto disk, along with the progress of high capacity, similarly, it becomes in the interchangeability with the low capacity standard on the point of problem, does not change on the point of the size of the size restrictions machine of medium.
At such problem, that people have proposed is brand-new, about the standard of small-sized recording medium.
If but that medium becomes is small-sized, then optical pick-up device lens, unit also must miniaturizations.
And, if optical pick-up device lens, unit miniaturization, then itself manufacturing or very difficulties that will become such as assembling, adjustment of lens.
Summary of the invention
Thereby, in the present invention, be purpose very small-sized optical pick-up device lens, optical pick-up unit are proposed manufacturing or assembling, the easy shape of adjustment and using method.
Utilize formation shown below can reach above-mentioned purpose.
A kind of optical forming piece of the present invention comprises: an axial region has first xsect; Connecting portion integrally is installed to this axial region, extends axially at an axial region, has second xsect less than first xsect; And the optical function parts, integrally be installed to this connecting portion; The diameter of wherein above-mentioned optical function parts is littler than the amplitude of first xsect of above-mentioned axial region.
(1-1) a kind of object lens, in the object lens of the optical Pickup device that carries out recording of information and/or regeneration with respect to optical information recording medium, it is characterized in that: have the lens section of the sub-circular shape that contains flange part and be arranged on connecting portion on this lens section integratedly, and satisfy following relation respectively.
0.5≤A≤2.0
0.3A≤B≤1.7A
In the formula: A is the diameter (mm) of the lens section seen from optical axis direction;
B is the width (mm) of the connecting portion seen from optical axis direction.
(1-2) (1-1) object lens of being recorded and narrated is characterized in that: extend from said lens portion and be provided with 1 connecting portion.
(1-3) (1-2) object lens of being recorded and narrated, it is characterized in that: above-mentioned object lens are to form by the independent inlet potting resin from metal die.
(1-4) (1-2) or the object lens (1-3) recorded and narrated is characterized in that: above-mentioned object lens satisfy following relational expression
0.3A≤B≤0.8A
(1-5) (1-2) and even the object lens (1-4) recorded and narrated is characterized in that: cut above-mentioned connecting portion, so that when optical axis direction is watched above-mentioned object lens, do not have the approximate round-shaped part that is projected into the outside.
(1-6) (1-1) object lens of being recorded and narrated is characterized in that: on the direction of face-off respectively, extend from said lens portion and to be provided with 2 connecting portions.
(1-7) (1-6) object lens of being recorded and narrated is characterized in that: above-mentioned its mutual varying in size of 2 connecting portions.
(1-8) (1-6) and even the object lens (1-7) recorded and narrated is characterized in that: the thickness of 2 above-mentioned its optical axis directions of connecting portion is different mutually.
(1-9) (1-6) and even the object lens (1-8) recorded and narrated is characterized in that: the length of above-mentioned 2 its optical axises of connecting portion and right angle orientation is different mutually.
(1-10) (1-6) and even the object lens (1-9) recorded and narrated is characterized in that: its wide length of seeing from optical axis direction of 2 above-mentioned connecting portions is different mutually.
(1-11) (1-1) object lens of being recorded and narrated is characterized in that: the central configuration lens section of rectangle connecting portion formed object lens.
(1-12) (1-6) and even the object lens (1-11) recorded and narrated, it is characterized in that: above-mentioned object lens are formed by the single or a plurality of inlet potting resin from metal die.
(1-13) (1-6) and even (1-10) or the object lens of (1-12) being recorded and narrated is characterized in that: extend from said lens portion respectively on the direction of face-off 2 connecting portions are set, and form 2 connecting portions from each connecting portion end potting resin.
(1-14) (1-11) or the object lens (1-12) recorded and narrated is characterized in that: form object lens on the central configuration lens section ground of rectangle connecting portion and from each potting resin ground, connecting portion end.
(1-15) (1-12) and even the object lens (1-14) recorded and narrated, it is characterized in that: seaming position is positioned at outside the optical function face of said lens portion.
(1-16) (1-1) and even the object lens (1-15) recorded and narrated, it is characterized in that: above-mentioned object lens are non-spherical lenses.
(1-17) (1-1) and even the object lens (1-16) recorded and narrated, it is characterized in that: above-mentioned object lens are the lens that obtain by compression molding.
(1-18) (1-1) and even the object lens (1-16) recorded and narrated, it is characterized in that: above-mentioned object lens are the lens that obtain by injection molded.
(1-19) (1-16) object lens of being recorded and narrated is characterized in that: the double resin flow channel of doing said lens portion of above-mentioned connecting portion.
(1-20) (1-18) and even the object lens (1-19) recorded and narrated, it is characterized in that: above-mentioned object lens are plastic lenss.
(1-21) (1-17) object lens of being recorded and narrated, it is characterized in that: above-mentioned object lens are glass lenss.
(1-22) (1-1) and even the object lens (1-21) recorded and narrated is characterized in that: be formed with diffraction structure on the optical function face of above-mentioned object lens.
(1-23) a kind of manufacture method of optical element a kind ofly forms the manufacture method of optical element from a plurality of inlet potting resins of metal die, it is characterized in that:
From above-mentioned a plurality of inlet potting resin the time, make resin inject the difference on opportunity of beginning.
In addition, among the present invention, reach by following means about the invention of using method.
(2-1) a kind of using method of optical forming member, it is characterized in that: from being equipped with the 1st resin flow channel with the 1st basal area, the 2nd resin flow channel that is present in resin flows direction the place ahead of the 1st resin flow channel and has the little basal area of more above-mentioned the 1st basal area, and then the optical forming component forming of optical function portion forming section in resin flows direction the place ahead that is present in the 2nd resin flow channel is with after having taken out the optical forming member in the metal die, in order to the position that flows into channel formation with above-mentioned the 1st resin is benchmark, carries out the use of above-mentioned optical forming member.
(2-2) a kind of using method of optical forming member, it is characterized in that: from being equipped with the 1st resin flow channel with the 1st basal area, the 2nd resin flow channel that is present in resin flows direction the place ahead of the 1st resin flow channel and has the little basal area of more above-mentioned the 1st basal area, and then the optical forming component forming of optical function portion forming section in resin flows direction the place ahead that is present in the 2nd resin flow channel is with after having taken out the optical forming member in the metal die, after having cut off the position that utilizes above-mentioned the 1st resin inflow channel formation, with continuously in utilizing above-mentioned the 2nd resin to flow into the position of channel formation, the position that is flowed into channel formation by above-mentioned the 1st resin is a benchmark, carries out the use of above-mentioned optical forming member.
(2-3) a kind of using method of optical forming member, it is characterized in that: from being equipped with the 1st resin flow channel with the 1st basal area, the 2nd resin flow channel that is present in resin flows direction the place ahead of the 1st resin flow channel and has the little basal area of more above-mentioned the 1st basal area, and then the optical forming component forming of optical function portion forming section in resin flows direction the place ahead that is present in the 2nd resin flow channel is with after having taken out the optical forming member in the metal die, behind the position that has cut off the regulation of utilizing above-mentioned the 1st resin to flow into channel formation, with continuously in utilizing above-mentioned the 2nd resin to flow into the position of channel formation, the position that is flowed into channel formation by above-mentioned the 1st resin is a benchmark, carries out the use of above-mentioned optical forming member.
(2-4) using method of (2-3) optical forming member of being recorded and narrated, it is characterized in that: the position of above-mentioned regulation is to flow into the position of channel formation and utilize above-mentioned the 2nd resin to flow into the border at the position of channel formation from above-mentioned the 1st resin, has the position distance that provides in advance, flowed into channel formation by above-mentioned the 1st resin.
(2-5) using method of (2-1) and even the optical forming member (2-4) recorded and narrated is characterized in that: above-mentioned " processing " refers to the position of above-mentioned optical forming member and determines.
(2-6) using method of (2-1) and even the optical forming member (2-5) recorded and narrated, it is characterized in that: above-mentioned " processing " refers to the maintenance of above-mentioned optical forming member.
(2-7) using method of (2-1) and even the optical forming member (2-6) recorded and narrated, it is characterized in that: above-mentioned " processing " refers to the installation of above-mentioned optical forming member.
(2-8) using method of (2-1) and even the optical forming member (2-7) recorded and narrated, it is characterized in that: above-mentioned " processing " refers to the cut-out of above-mentioned optical forming member.
(2-9) using method of (2-1) and even the optical forming member (2-8) recorded and narrated, it is characterized in that: above-mentioned " processing " the above-mentioned optical function portion with above-mentioned optical forming member of referring to cuts off the position that utilizes above-mentioned the 2nd resin flow channel formed thereby after being combined on other the member.
(2-10) using method of (2-9) optical forming member of being recorded and narrated is characterized in that: the member of above-mentioned other refers to the carrying support.
(2-11) using method of (2-9) optical forming member of being recorded and narrated, it is characterized in that: the member of above-mentioned other refers to optical pick-up unit.
(2-12) using method of (2-1) and even the optical forming member (2-11) recorded and narrated is characterized in that: above-mentioned " processing " is meant the position recorded information of utilizing above-mentioned the 1st resin to flow into channel formation in above-mentioned optical forming member.
(2-13) using method of (2-12) optical forming member of being recorded and narrated, it is characterized in that: above-mentioned information refers to the metal die sequence number.
(2-14) using method of (2-12) and even the optical forming member (2-13) recorded and narrated, it is characterized in that: above-mentioned information refers to the die cavity sequence number.
(2-15) using method of (2-12) and even the optical forming member (2-14) recorded and narrated, it is characterized in that: above-mentioned recording of information is undertaken by mint-mark.
(2-16) using method of (2-12) and even the optical forming member (2-15) recorded and narrated, it is characterized in that: above-mentioned recording of information is undertaken by printing.
(2-17) using method of (2-12) and even the optical forming member (2-16) recorded and narrated, it is characterized in that: above-mentioned recording of information is undertaken by stickup.
In addition, among the present invention, reach by following means about the invention of metal die.
(2-18) a kind of optical forming component forming metal die, a kind of the 1st resin flow channel that possesses the 1st basal area, the 2nd resin flow channel that is present in resin flows direction the place ahead of the 1st resin flow channel and has the little basal area of more above-mentioned the 1st basal area, and then be present in the optical forming component forming metal die of optical function portion forming section in resin flows direction the place ahead of the 2nd resin flow channel, it is characterized in that: being shaped has an axial region that flows into channel formation by above-mentioned the 1st resin, flow into the connecting portion of channel formation and the optical forming member of the optical function portion that is shaped by above-mentioned optical function portion forming section by above-mentioned the 2nd resin.
(2-19) (2-18) optical forming component forming metal die of being recorded and narrated is characterized in that: the three-dimensional identification marking that can be shaped on above-mentioned axial region of formed above-mentioned the 1st resin flow channel.
(2-20) (2-18) and even the optical forming component forming metal die (2-19) recorded and narrated, it is characterized in that: the resin flows direction of above-mentioned the 1st resin flow channel and above-mentioned the 2nd resin flow channel is the near linear shape.
(2-21) (2-18) and even the optical forming component forming metal die (2-20) recorded and narrated, it is characterized in that: the resin flows direction of the resin flows direction of above-mentioned the 1st resin flow channel and above-mentioned the 2nd resin flow channel is consistent with each other, and also is the near linear shape simultaneously.
(2-22) (2-18) and even the optical forming component forming metal die (2-20) recorded and narrated, it is characterized in that: the resin flows direction of the resin flows direction of above-mentioned the 1st resin flow channel and above-mentioned the 2nd resin flow channel is in the relation of nearly orthogonal.
(2-23) (2-18) and even the optical forming component forming metal die (2-22) recorded and narrated, it is characterized in that: above-mentioned the 1st resin flow channel is a runner.
(2-24) (2-18) and even the optical forming component forming metal die (2-23) recorded and narrated, it is characterized in that: above-mentioned the 2nd resin flow channel is cast gate (feeding mouth).
(2-25) (2-18) and even the optical forming component forming metal die (2-24) recorded and narrated, it is characterized in that: above-mentioned the 1st resin flow channel of formation can make the section configuration of above-mentioned axial region be configured as sub-circular.
(2-26) (2-18) and even the optical forming component forming metal die (2-24) recorded and narrated, it is characterized in that: above-mentioned the 1st resin flow channel of formation can make the section configuration of above-mentioned axial region be configured as approximate trapezoid.
(2-27) (2-18) and even the optical forming component forming metal die (2-24) recorded and narrated, it is characterized in that: above-mentioned the 1st resin flow channel of formation can make the section configuration of above-mentioned axial region be configured as approximate half-circular.
(2-28) (2-27) optical forming component forming metal die of being recorded and narrated is characterized in that: the normal of the string portion that above-mentioned the 1st resin flow channel of formation and optical function portion forming section can make above-mentioned approximate half-circular is approximate consistent with the optical axis of the optical function face of above-mentioned optical function portion.
(2-29) (2-18) and even the optical forming component forming metal die (2-28) recorded and narrated is characterized in that: above-mentioned the 1st resin flow channel of the formation protuberance that can be shaped on above-mentioned axial region.
(2-30) (2-18) and even the optical forming component forming metal die (2-29) recorded and narrated is characterized in that: above-mentioned the 1st resin flow channel of the formation recess that can be shaped on above-mentioned axial region.
(2-31) (2-14) and even the optical forming component forming metal die (2-21) recorded and narrated is characterized in that: above-mentioned the 2nd resin flow channel of formation can be concentrated portion by shaping stress on above-mentioned connecting portion.
Among the present invention, reach by following means about the invention of the manufacturing process that used above-mentioned metal die.
(2-32) a kind of optical forming component forming method is characterized in that: use above-mentioned (2-18) so that the optical forming component forming (2-31) recorded and narrated with metal die shaping optical forming member.
Among the present invention, reach by following means about the invention of the formed products that used above-mentioned metal die.
(2-33) a kind of optical forming member, it is characterized in that: use above-mentioned (2-18) and even the optical forming component forming (2-31) recorded and narrated is shaped with metal die, and have by above-mentioned the 1st resin flow into channel formation an axial region, flow into the connecting portion of channel formation and the optical function portion that is shaped by above-mentioned optical function portion forming section by above-mentioned the 2nd resin.
Among the present invention, reach by following means about the invention of formed products.
(2-34) a kind of optical forming member, it is characterized in that: a axial region with the 1st basal area, the connecting portion of the little basal area of the 1st more above-mentioned basal area is set and has continuously at the axial direction of this axial region, have the continuous optical function portion that is provided with in this connecting portion, and the weight of the above-mentioned optical function of the total weight ratio portion of above-mentioned axial region and above-mentioned connecting portion is big.
(2-35) a kind of optical forming member, it is characterized in that: a axial region with the 1st basal area, the connecting portion of the little basal area of the 1st more above-mentioned basal area is set and has continuously at the axial direction of this axial region, have the continuous optical function portion that is provided with in this connecting portion, and the total weight of above-mentioned axial region and above-mentioned connecting portion is more than 70% of total weight.
(2-36) a kind of optical forming member, it is characterized in that: a axial region with the 1st basal area, the connecting portion of the little basal area of the 1st more above-mentioned basal area is set and has continuously at the axial direction of this axial region, have the continuous optical function portion that is provided with in this connecting portion, and above-mentioned axial region is provided with the information recording part position.
(2-37) (2-33) and even the optical forming member (2-36) recorded and narrated, it is characterized in that: the section configuration of above-mentioned axial region is a sub-circular.
(2-38) (2-33) and even the optical forming member (2-36) recorded and narrated, it is characterized in that: the section configuration of above-mentioned axial region is an approximate trapezoid.
(2-39) (2-33) and even the optical forming member (2-36) recorded and narrated, it is characterized in that: the section configuration of above-mentioned axial region is an approximate half-circular.
(2-40) (2-39) optical forming member of being recorded and narrated is characterized in that: the normal of the string portion of above-mentioned approximate half-circular is approximate consistent with the optical axis of the optical function face of above-mentioned optical function portion.
(2-41) (2-33) and even the optical forming member (2-39) recorded and narrated, it is characterized in that: above-mentioned axial region is provided with protuberance.
(2-42) (2-33) and even the optical forming member (2-39) recorded and narrated, it is characterized in that: above-mentioned axial region is provided with recess.
(2-43) (2-33) and even the optical forming member (2-39) recorded and narrated is characterized in that: above-mentioned connecting portion is provided with stress and concentrates portion.
(2-44) (2-43) optical forming member of being recorded and narrated is characterized in that: it is the recess of V shape that above-mentioned stress is concentrated portion, and with the optical axis nearly orthogonal of the optical function face of above-mentioned optical function portion towards on be recessed.
(2-45) (2-43) optical forming member of being recorded and narrated is characterized in that: it is the recess of V shape that above-mentioned stress is concentrated portion, and with the optical axis of the optical function face of above-mentioned optical function portion approximately equalised towards on be recessed.
Among the present invention, reach by following means about the using method invention of above-mentioned formed products.
(2-46) a kind of using method of optical forming member, the method for a kind of use (2-41) and even the optical forming member (2-42) recorded and narrated is characterized in that: raised part and/or the recess index when determining the position is used.
(2-47) a kind of using method of optical forming member, the method for a kind of use (2-41) and even the optical forming member (2-42) recorded and narrated is characterized in that: the guiding when using of raised part and/or recess is used.
Among the present invention, reach by following operation about the invention of optical pick-up unit assemble method.
(2-48) a kind of optical pick-up unit assemble method, it is characterized in that: the formed products that in optical function portion, integrally is shaped between the axial region bigger, connecting portion in the assembling than this optical function portion, after keeping above-mentioned axial region to be assembled into above-mentioned optical function portion on the optical pick-up unit, cut off above-mentioned connecting portion.
(2-49) a kind of optical pick-up unit assemble method is characterized in that: the formed products that in optical function portion, integrally is shaped between the axial region bigger, connecting portion in the assembling than this optical function portion,
After keeping above-mentioned axial region to be assembled into above-mentioned optical function portion in the accommodating container, cut off above-mentioned connecting portion.
(2-50) (2-48) and even the optical pick-up unit assemble method (2-49) recorded and narrated is characterized in that: above-mentioned axial region volume is greater than above-mentioned optical function portion.
(2-51) (2-48) and even the optical pick-up unit assemble method (2-50) recorded and narrated is characterized in that: above-mentioned axial region weight is greater than above-mentioned optical function portion.
Description of drawings
Fig. 1 is the figure of the object lens of the relevant embodiment 1 that sees from optical axis direction.
Fig. 2 is the figure of the object lens of relevant Fig. 1 of seeing from direction X.
Fig. 3 is the figure of the object lens of the relevant embodiment 2 that sees from optical axis direction.
Fig. 4 is the figure of the object lens of relevant Fig. 3 of seeing from direction X.
Fig. 5 is the object lens of the relevant embodiment 2 of an example.
Fig. 6 is the object lens of the relevant embodiment 2 of an example.
Fig. 7 is the object lens of the relevant embodiment 2 of an example.
Fig. 8 is the figure of the object lens of the relevant embodiment 3 that sees from optical axis direction.
Fig. 9 is the figure of the object lens of relevant Fig. 8 of seeing from direction X.
It is the general survey of relevant metal die of the present invention that Figure 10 provides.
Shown in Figure 11 be relevant metal die of the present invention want portion's enlarged drawing.
Shown in Figure 12 is the oblique view of relevant formed products of the present invention.
Shown in Figure 13 is the sectional drawing of an axial region of relevant formed products of the present invention.
Figure 14 is an oblique view of having given the state of information on an axial region of relevant formed products of the present invention.
Figure 15 is the sectional drawing that is provided with the example of three-dimensional identification marking on an axial region of relevant formed products of the present invention.
Figure 16 is the oblique view that is provided with the example of three-dimensional identification marking on an axial region of relevant formed products of the present invention.
Figure 17 is the sectional drawing that is provided with the metal die of three-dimensional identification marking on an axial region of relevant formed products of the present invention.
Shown in Figure 180 be on the connecting portion of relevant formed products of the present invention, be provided with stress concentrate portion example want portion's enlarged drawing.
Figure 19 is the oblique view that is provided with the example of information recording part position on an axial region of relevant formed products of the present invention.
Figure 20 is the oblique view of the example of relevant formed products of the present invention.
Shown in Figure 21 is the oblique view of an example of optical forming piece, (a) for be formed with the situation of the trapezoidal teat of quadrangular pyramid roughly in parallel plane portion, (b) be the situation of the teat of formation Nogata body shape on parallel plane.
Shown in Figure 22 is key diagram when metal die is peeled off optical forming piece.
Embodiment
Below, describe content of the present invention with reference to the accompanying drawings in detail, but example of the present invention is not limited only to these contents.
(embodiment 1)
Fig. 1 is the figure of the object lens 1 of the embodiment 1 that sees from the optical axis axial direction, and Fig. 2 is the sectional drawing of the same object lens seen from direction of arrow X.
For this reason, although be minimum lens, owing to be provided with the connecting portion that is used to use, so the advantage that has use, carries out easily to the assembling of optical Pickup device.In addition, by on connecting portion, carrying out some mint-mark or printing, can also give name of product or batch sequence number, metal die sequence number etc.
In addition, though it is also passable to constitute the shape that flange part is not set, if consider to determine position, use and then, flange part had better be set to the influence of lens face or protection etc.
And, because be the plastic lens of injection molded as described above, so adopted the technology of (1-18), (1-19).For this reason, can stablize and make at high speed in a large number the lens of same shape.Particularly owing to the size condition that has satisfied by (1-1) regulation, so can also obtain the advantage that the inflow of resin is good and formability is good.
In addition, the shape of metal die can flow into resin ground formations from connecting portion 20, has adopted the technology of (1-3), (1-18).Therefore, the shape of this metal die structure is uncomplicated, and the resin flow channel can be used as member of formation.
Be connected by the part with the pick-up side that does not illustrate flange part, the position when lens section 10 can be organized into pick-up device determines, and then the optical function face of lens face 11 can be in requisition for definite NA.
In these object lens 1,, adopt the technology of (1-16) and the optical function face is formed aspherical shape in order to improve the optically focused performance.
And, in order to carry out temperature compensation (raising temperature characterisitic), adopting the technology of (1-22), ring-band shape ground is formed with diffraction structure on the optical function face.Both can all on the optical function faces diffraction surfaces be set, also can be in requisition on the position of expectation, being provided with.In addition, be not only to be used to carry out temperature compensation, but also can be to proofread and correct headed by the various aberrations, give wishing the diffraction surfaces of the optical characteristics that the optical characteristics that makes it to improve or hope makes it to give corresponding.
In addition, not when needing diffraction surfaces especially, can diffraction surfaces be set yet and only reach optical function with plane of refraction.
Here, the situation of formation is, the total length C that lens section and width portion add together is 3mm, and the maximum ga(u)ge D of lens section (be axial width this moment) is 0.41mm, and the thickness E of propping up axial region is 0.2mm, but they can select suitable value.
As a comparison, be shape shown in Figure 1 on the general survey, and the different lens of size that make the width of the diameter that makes lens section and connecting portion are inquired into.
At first,, less than the present invention regulation big or small the time, produced the luminous energy deficiency, can't reach enough optical properties about the size of lens section.In addition, usability is low, and assembleability worsens.And then the inflow of the resin in the metal die worsens, and the yield rate on the injection molded also descends.On the contrary, greater than the present invention regulation big or small the time,, can reach optical characteristics, difficulty but the miniaturization of the miniaturization of recording medium, pick-up device then becomes near the object lens that the CD that sells on the market now or DVD use.
And during less than the present invention regulation big or small, because the flow channel of resin becomes narrow, resin can not sufficiently flow at connecting portion, and injection molded itself can not be realized.On the contrary, during greater than the present invention regulation big or small, producing shrinkage cavity (bad position in the shaping that resin not have to flow into) on the connecting portion, this can not realize the good injection molding shaping.
In contrast, object lens formability, usability in the specialized range of the present invention are all good, and the optical property of organizing behind the pick-up device is also no problem fully.
(embodiment 2)
General survey shape shown in Figure 3 is the figure of the plastics system object lens 2 of the embodiment 2 that sees from the optical axis axial direction, and Fig. 4 is the sectional drawing of the same object lens seen from direction of arrow X, has adopted the technology of (1-6).
With the difference of embodiment 1 be to have the 2nd connecting portion 21 this point because the point beyond it is identical with embodiment 1, so add prosign for same formation, the while is also omitted its explanation.
By 2 connecting portions are set, have the advantage that for example can improve usability, and increased the advantage that to carry out the zone of mint-mark or lettering by the connecting portion that keeps two sides.
In addition, about these 2 connecting portions, can as (1-3) or (1-18) said, both can make at least one side's double as resin flow channel of 20 and 21, also can be as (1-11) and technology (1-12), double as resin flow channel respectively.
When two sides of connecting portion are the resin flow channel,,, can contain the generation of shrinkage cavity so can at a high speed and form effectively because resin flows at high speed.And,,, enhance productivity so can shorten cycle length because can also the needed time of cripetura injection molded.
In addition, even make it to flow into resin,, then also can be shaped if satisfy size condition by the present invention's regulation from the connecting portion of folk prescription no problemly.
Below, the mutual different form of the shape that makes connecting portion 20,21 is described.
If flow into resin respectively from 2 connecting portions, owing to be that different resin is joined in the inside of metal die, so will produce seam inevitably.If this seam appears on the optical function face of lens section, then transmitance descend, the error expansion of aspherical shape etc., will exert an influence on itself at optical function.Therefore, the time that need be configured its cost.
As solution from vpg connection, as (1-7) and even (1-10) like that, making the size of connecting portion mutually, different forms is a kind of otherwise effective technique.As the concrete method of the size of connecting portion being made different mutually forms, can suitably select or make up the length of the direction that adopts the thickness, change and the light shaft positive cross that change optical axis direction or change the wide length of seeing from optical axis direction.Particularly, can consider Fig. 5, Fig. 6, shape as shown in Figure 7 respectively.Especially, in the wide length that makes connecting portion not simultaneously, need make it to reach the condition and range that (1-1) provides.
By constituting in this wise, because the resin that flows into is not to arrive the optical function face simultaneously, so the junction of two kinds of resins produces the position beyond lens section.Therefore, it is outer that seam also is located in the optical function face certainly.
In the example of Fig. 5, the thickness of connecting portion is respectively 0.1mm, 0.2mm.
In the example of Fig. 6, the length of connecting portion is respectively 0.65mm, 1.3mm.
In the example of Fig. 7, the width of connecting portion is respectively 0.8mm, 1.2mm.Here, it is respectively 0.92A, 0.62A, the condition of satisfied (1-1).
Secondly, as the solution on manufacture method, as the technology that (1-23) recorded and narrated, have to make resin inject the diverse ways on opportunity of beginning.
About the resin of metal die is injected, if consider various injecting conditions with dissolving of resin headed by the temperature, then resin flow inlet ground changes relatively difficulty of inflow velocity one by one.Thereby, for the junction opportunity (junction position) of controlling two kinds of resins, the difference on opportunity that injection moulding is begun.
By adopting this method, can not need to increase substantially the local control that realizes seaming position.
In addition, by making the shape difference of 2 connecting portions, also have can hold easily lens towards advantage.
(embodiment 3)
General survey shape shown in Figure 8 is the figure of the object lens 2 of the embodiment 3 that sees from the optical axis axial direction, and Fig. 9 is the sectional drawing of the same object lens seen from direction of arrow X, has adopted the technology of scheme (1-14).
As rectangular shape, be a kind of connecting portion that on square shape, extends central chinampa shape the formation of lens section is set.Though this is a kind of and variform shape embodiment 1, embodiment 2, it also is the size according to the definite connecting portion of the condition of (1-1).For this reason, there is not problem on the injection molded.And, because axial region roughly is to extend in whole directions from lens section, thus easier on using, and increased the advantage in the zone that the data mint-mark prints in addition.And then, by fixedly connected portion, also have with the plane of light shaft positive cross on, determine such advantage at the enterprising line position of any one direction of x direction, y direction easily.
In this embodiment, lens section is 0.85mm, has made the length 1.3mm (1.53A) on one side of the rectangle connecting portion of square shape, satisfies the condition of (1-2).
In addition, though flange is not set on lens section here, flange is set, and also it doesn't matter.
In addition, with embodiment 1, embodiment 2 similarly, though be plastic lens, also can make the glass molds applanation lens by compression molding.Especially, because be shape, so be the shape that is suitable for compression molding from the full Zhou Yanshen connecting portion of lens section.
Have, in the example of Fig. 8, connecting portion is a square shape again, but also can be in requisition for carrying out chamfering or carrying out R processing etc.In addition, utilize the bight to carry out the size of chamfering if change, then can be used in adjust lens towards.And then, also can as required rectangle be made rectangular shape, trapezoidal shape, parallelogram shape, the rectangular shape more than 5 dihedrals, so long as scope of the present invention is all no problem.
Here, the advantage that the situation of asymmetrical shape has that the position that can easily carry out object lens is determined, direction is determined and so on.
When these object lens of injection molded, make it to flow into resin from one one of connecting portion and form though remain, can not the inflow entrance of position, 1 place, the above inflow entrance in 2 places both can be set as required, also can be according to the thickness of position change connecting portion.
(embodiment 4)
The object lens of embodiment 4 and Fig. 1 are identical to lens shape shown in Figure 9, but it is the glass lens that heating obtains as compression molding behind the pre-type of raw-material glass.It is the object lens of the technology that adopted (1-17), (1-21).
Because this is a kind of glass lens, so its optical characteristics excellence, in addition, temperature characterisitic is also than plastic lens excellence.
In the lens that this compression molding is made, also need to satisfy the condition of (1-1).
Promptly, when the pre-type of compression molding makes lens section have enough optical properties, form with needing to form connecting portion, so if a kind of wide ratio of connecting portion that has departed from the scope of (1-1), then can produce and to form connecting portion, even on lens section, the unusual such problem that is shaped can take place.
Thereby, even, also only be that the shape that satisfies by (1-1) certain conditions could be shaped well with the situation of glass raw material compression molding micro objective.
More than, utilize (1-1) and invention (1-2), can be used, such advantage is carried out in the assembling of pick-up device easily.The inflow that can also obtain resin is good, the advantage that formability is good.In addition, even the situation of compression molding by satisfying this condition, also can obtain suitable lens.
Utilize the invention of (1-3), the shape structure of metal die can not become complicated, and the resin flow channel can also be used as component parts.
Utilize the invention of (1-4), if be lower than the lower limit of the relational expression that (1-4) recorded and narrated, then material can not flow into glossily formability is worsened, on the other hand, if be higher than higher limit, then the wide change of connecting portion is big, and the cut-out processing of connecting portion needs spended time, increase the lens load, and consider also undesirable from the angle of heat distortion.
Utilize the invention of (1-5), the conglobate shape of cutting can be rotated adjustment on the single-piece lens, and installs easily.
Utilize the invention of (1-6), the advantage of the usability that can be improved by the connecting portion that keeps two sides, in addition, also having has increased the advantage that can carry out the zone of mint-mark or printing.
Utilize (1-7) and even invention (1-10), because the resin that flows into is not to arrive the optical function face simultaneously, so the junction of two kinds of resins produces the position beyond lens section.Therefore, seam also is located in outside the optical function face certainly.
Utilize the invention of (1-11),, so that use will become will be easier, and increased the advantage in the zone that the data mint-mark prints in addition because connecting portion roughly is to extend from lens section omnirange ground.And then, by fixedly connected portion, also have with the plane of light shaft positive cross on, determine such advantage at the enterprising line position of any one direction of x direction, y direction easily.
From a plurality of inlet potting resin of (1-12) time, and the invention that utilizes (1-13), (1-14), owing to can flow into resin and at a high speed and form effectively at high speed, so can contain the generation of shrinkage cavity.And,,, enhance productivity so can shorten cycle length because can also shorten the needed time of injection molded.
In addition, by making the shape difference of 2 connecting portions, be easy in addition to hold lens towards advantage.
Utilize the invention of (1-15), owing to seam is positioned at outside the optical function face, so can obtain the good lens of optical characteristics.
Utilize the invention of (1-16), can obtain the good lens of optical characteristics.
Utilize the invention of (1-17), can stablize and make at high speed in a large number the lens of same shape.
Utilize the invention of (1-18), can stablize and make at high speed in a large number the lens of same shape.Particularly because satisfy size condition, so can obtain that the inflow of resin is good, the good such advantage of formability by (1-1) regulation.
Utilize the invention of (1-19), the shape structure of metal die can not become complicated, and the resin flow channel can also be used as component parts.
Utilize the invention of (1-20), can stablize and make at high speed in a large number the lens of same shape.Particularly because satisfy size condition, so can obtain that the inflow of resin is good, the good such advantage of formability by (1-1) regulation.
Utilize the invention of (1-21), can obtain excellent in temperature characteristic, the good lens of transmitance.
Utilize the invention of (1-22), can give desired optical property by diffraction surfaces.
Utilize the invention of (1-23), can not need significantly to realize the control of seaming position with raising the cost.
Below, according to drawing forming process of the present invention is described, but example of the present invention is not only to be defined in these contents.
The invention is characterized in: integrally form formed products with the big shape of lens volume or weight of going into light picker than final group, in using operation, to keep position etc. beyond the lens as using the reference position, after this formed products was combined to optical pick-up unit or takes in support, the part beyond lens was cut off.
M shown in Figure 10 is one one a overview of the metal die of the relevant optical forming member of the present invention of shaping.It is resin flow channel with approximate H shape, and at the large-diameter portion that is positioned at central authorities, be the plastic resin that dissolves from direction inflow, amount to 8 the metal die optical forming member, so-called multi-cavity compression mod (be 8 this moment) by a metal die shaping perpendicular to paper.And, such as everyone knows, metal die can be made of fixation side and movable side, close them in that resin flow is fashionable, flow into laggard row cooling at resin, be over then separately fixation side metal die and movable side metal die and open metal die inside the member that taking out is shaped has got well if be shaped.
Figure 11 is the sectional drawing (comprising the movable side of fixation side) of a shaping seeing from direction 1 in this metal die.The 31st, as the runner of the 1st resin flow channel, the 32nd, as the cast gate of the 2nd resin flow channel, the 33rd, optical function portion forming section.The 1st its section of resin flow channel is circle, and the 2nd its section of resin flow channel is a rectangle.
The inner face of metal die, promptly forming face is also such as everyone knows, utilizes all job operations to carry out Surface Finishing.Optical function portion forming section particularly, its formation is not only aspheric surface, gives endless belt etc. but also can form diffraction structure endless belt, phase deviation endless belt, optical path difference, at this moment, uses the very sharp-pointed cutter head cut metal die of front end.As the material of metal die, can select suitable desirable starting material with headed by the iron of electroplating.
In addition, in this drawing, the 1st its section of resin flow channel 31 (runner) is circle, has the same diameter, but the diameter of this flow path portion, shape to there is no need must be the same.Structure or shape that can corresponding metal die be made as diameter from φ 6 to φ 4 ground, discontinuous variation basal area or shape the conical in shape that also can adopt diameter to change from φ 6 to φ 4 ground, continuously.In addition, section configuration also can have the variation that changes to rectangle etc. from circle.
And then the resin that dissolves flow into the 2nd resin flow channel 32 from the 1st resin flow channel 31, and further flow into optical function portion forming section 33 via the 2nd resin flow channel 32, in cooling and after finishing to be shaped, and open metal die.
In the example of this metal die, the resin flow Inbound of the 1st resin flow channel and the 2nd resin flow channel all is a linearity, and is direction consistent with each other.
But formation that can corresponding metal die integral body or other changes of circumstance should constitute.For example, the curve that can make the 1st resin flow channel have regulation.In addition, simultaneously the resin flow Inbound of the 1st resin flow channel and the 2nd resin flow channel is made linearity, and and then make it to become mutually orthogonal position relation also it doesn't matter.Adopt such way, can make metal die have three-dimensional shape, obtain to increase the such advantage of die cavity number.As, use as shown in Figure 20 the shape of being shaped as of formed parts that such metal die is shaped.
The optical forming member that is shaped with the metal die M of Figure 10 forms with shape as shown in figure 10.
Here, the each several part that utilizes metal die 0 to be shaped, its axial region 41 diameters are 5mm, are the rectangle of 0.5～1mm on one side connecting portion 42 is section configurations, the diameter of optical function portion 43 is 1mm～1.5mm.
For this reason, it is unusual difficulty that the optical function portion 43 as the lens position of directly keeping uses, but, then be easy to keep and also be suitable for carrying out other operation by being that benchmark uses to utilize formed axial region of the 1st resin flow channel 31 (runner) 41.
Particularly, maintenance (controlling) when open metal die is taken out formed products, with the maintenance (controlling) after the taking-up headed by the carrying, carry, determine position, installation (or assembling on other members, also become assembling), for maintenance of cutting off etc., be that benchmark carries out all with this axial region 41.
Locate to be cut off at AA ' shown in Figure 11 with the formed products that metal die M is shaped.
Figure 12 has provided the shape P of the optical forming member of locating to cut off at AA '.
The 41st, an axial region that utilizes the 1st resin flow channel 31 (runner) to form, 42 is connecting portions that the 2nd resin flow channel 32 (cast gate) forms, the 43rd, the optical function portion that utilizes optical function portion forming section 33 to form.
Such as previously described, in fact the part that is assembled in the machines such as optical pick-up unit is an optical function portion 43, but as described above, because it is very little, use relatively difficulty separately, so adopt to carry etc. with the state of the formed products P of an axial region 41 or connecting portion 42 one, and go into before the optical pick-up unit or group is gone into after optical pick-up unit etc. in final group, 42 places cut off at connecting portion, and optical function portion 43 is installed to way on the optical pick-up unit.In addition, also can formed products P is received into carrying with support etc. in after carry out the cut-out of connecting portion 42.
In addition, and even on the size of axial region 41 optical function portions 43,, on formed products P, preferably prop up axial region 41 certainly and connecting portion 42 is bigger than the weight of optical function portion 43 in order to carry out above-mentioned so all manipulating.
And then, wish that the total weight of an axial region 41 and connecting portion 42 is more than 70% of total weight.
This promptly, so-called optical forming member with (2-35) statement, exactly as be positioned at Figure 12 such by axial region. the state that connecting portion optical function portion constitutes, the i.e. such optical forming member of formed products P shown in this figure, not the sort of in the such metal die that provides with Figure 10, demonstrate the optical forming member of the shaped state that fixed part and movable part presented of the back separating metal mould that is shaped.
Yet,, can further be modified to the shape of the metal die of shape formed products P for the use after this that makes the optical forming member after the shaping is more prone to.
Figure 13 is the section configuration distortion of the 1st resin flow channel 31 (runner) shape.(a) being circular, (b) is semicircle, is symmetrical trapezoidal (c).If adopt (b) (c) such asymmetrical shape, then when mounting is to platform etc., can prevent the upset that an axial region 41 rotations cause.In addition, when matched position etc., also has the advantage that its shape itself is index.
In addition, consider the rigidity of otherwise usability, formability, ready-made formed parts etc., also can adopt (d), (e) such shape.
(d) be the section configuration that in the string portion of semicircle, is provided with rectangle part (symmetrical trapezoidal portions).Utilize this shape can improve rigidity, can prevent rotation simultaneously, in addition, the position is determined also to carry out easily.
(e) be to have made up a plurality of symmetrical section configurations after trapezoidal.This also is a kind ofly can improve rigidity, can prevent rotation simultaneously, and also carries out the shape that the position is determined easily.
(f) optical forming piece P is the 41a of parallel plane portion that forms on the part of the arc portion of connecting portion 41 with string portion almost parallel.Thus, can prevent to rotate, and can position easily.And then, with the fixation side of the 41a of this parallel plane portion as metal die M, and with the movable side of string portion as metal die M, thereby according to easily optical forming piece P being peeled off from fixation side after the metal die M shaping.Like this, the distortion of the connecting portion 41 in the time of can suppressing to peel off obtains good optical forming piece P.
And then, shown in Figure 13 (g) and Figure 21 (a), also can on the 41a of parallel plane portion, form the roughly teat 41b of quadrangular pyramid trapezoidal (taper).This teat 41b has a pair of length direction side 41c that stands facing each other mutually and a pair of cross direction side 41d that stands facing each other mutually on Width on the length direction of axial region 41.Also have, chamfering has been carried out in the bight of teat 41b.This chamfering can be that dihedral also can be circular, but circular more outstanding aspect fissility.Structure shown in Figure 13 (g) not only produces the same action effect of structure shown in Figure 13 (f), and can position by teat 41b.Also have, shown in Figure 21 (b), teat 41b can be that roughly quadrangular pyramid is trapezoidal, also can be the Nogata bodily form.
At this, as shown in figure 22, to be made as O to vertical straight line of the 41a of parallel plane portion and the intersection point of the 41a of parallel plane portion from connecting portion 42 side ends of the trapezoidal portions of teat 41b, then when the peeling off of metal die M with axial region 41 on to produce with this O be the moment at center.Promptly, when the length direction that is made as the short transverse of L, teat 41b in the length of the length direction of the trapezoidal portions of teat 41b was made as T, preferably make 41a of parallel plane portion and the length direction side formed angle θ of 11c be: becoming with O was that center, radius are (L
2+ T
2)
1/
2The angle of tangent line of circle below.That is, making formed angle θ is below 45 °, then can reduce the moment of generation on the axial region 41, can increase substantially fissility.Also have, this formed angle θ is more little to improve fissility more.In addition, the coupling part of length direction side 41b and the 41a of parallel plane portion forms with mild radius-of-curvature and can further improve fissility.
In addition, particularly when making (b) such semicircular in shape, if the normal unanimity that can make semicircular string portion is in the optical axis of the optical function face of optical function portion 43, location matches when then utilizing the face that is equivalent to string portion to install easily because of it is so can be convenient to further use.
When considering with the concerning of the optical axis of such optical function portion, be not to be only limited to (b) such shape, and even (a) (g) such shape also can be suitable for.That is, if the situation of symmetrical trapezoidal shape preferably with respect to 2 parallel limits, makes vertical normal consistent with the optical axis of optical function portion.
And then, as other improvement, as shown in Figure 14, also can three-dimensional identification marking be set on the axial region 41 by being formed in.At this moment, on the 1st resin flow channel 31 (runner) of metal die, process, to form such identification marking., shown in Figure 18 (c), (d), be preferably in the 42a of graticule portion is set on the connecting portion 42 at this.Process on the inlet 2 of metal die M at this moment, to form graticule 42a on the connecting portion 42.
In the example of Figure 14, be formed with bar code, literal.And, can set by oneself such identification marking towards, size or shape.Also have, on an axial region, form bar code shown in Figure 14, the situation of literal, but also can in connecting portion 42, form these.
In addition, on such identification marking, except the expression name of product or batch the mark class, also can comprise the sequence number, cavity sequence number of metal die etc.If additional such identification marking then can be used in it inspection sampling of carrying out defect ware etc. in follow-up operation.
In addition, as shown in the figure, on connecting portion 42, be provided with according to graticule 42a from the distance of the optical axis center of above-mentioned optical function portion 42.Among Figure 18 (d), thereby form graticule 42a by incision connecting portion 42; Among Figure 18 (c), form graticule 42a highlightedly from connecting portion 42.In addition, among Figure 18 (c), form with the optical axis track ground formation graticule 42a of circle of the predetermined radius that is the center.Thus, when cutting off connecting portion 42, can cut off operation according to connecting portion 42a.
And then, as other improvement, and even as Figure 15 is shown in Figure 16, also can on an axial region 41, recess or protuberance be set.At this moment, also, on the 1st resin flow channel 31 (runner) of metal die, process, to form such shape as with shown in Figure 17.
These recesses or protuberance can be used as the position and determine with index, mounting pedestal, fixing with uses such as anchor clamps.For example, carrying such as track slide rail is being set, and when making it on its track, to slide carrying formed products P,, then can producing coming off from the track if recess and/or protuberance and track are in smooth chimerism.In addition, even when in accommodating containers such as support box, taking in formed products P,, then can similarly solve coming off and damaged problem in container if it and accommodating container can be carried out chimericly.At this, shown in Figure 16 (g), form protuberance, or carry out chamfering in the bight of protuberance with quadrangular pyramid trapezoidal shape roughly, then can reduce friction with track etc.The chamfering of this moment is shown in Figure 16 (g), forms circle, then can reduce friction significantly etc., helps practicality.
Have again,, as shown in Figure 18,, stress also can be set on connecting portion 42 concentrate portion in order to be easy to carry out the cut-out of connecting portion 42 as other improvement.
It is as Figure 18 (a), if with the optical axis nearly orthogonal of the optical function face of optical function portion 43 towards on form recessed V shape recess, then after formed products P being organized machine such as optical pick-up unit, as long as just can cut off connecting portion 42 with respect to an optical axis direction axial region 41 that tilts.In addition, as Figure 18 (b), also can with the optical axis of the optical function face of optical function portion 43 approximately equalised towards on form recessed V shape recess.
Such stress concentrates portion also can similarly to design in earnest in the metal die side with above-mentioned content, but in the 2nd flow channel 32, because the basal area of the passage by resin diminishes, so produce the problem in the shaping sometimes.Therefore, also can be after be shaped finishing, cut or Punching Technology forms such stress and concentrates portion by hemisection.
More than, relate generally to by narrating improveing use after the making shaping technology of being easy to that becomes on the metal die, but also can after shaping, think better of the way of use with the state that has formed formed products P.
For example, in the example of Figure 14,, on an axial region 41, be provided with identification marking, but exist the problem of having fixed the information that when being shaped, give in this by conscientiously improving the shape of the 1st resin flow channel 31.
Thereby, can after shaping, give some information.In addition, such recording of information also is a form of said among the present invention " processing ".
Be used for the example of this purposes as an example, as shown in Figure 19, can exemplify the way that processes the 1st resin flow channel 31 and configuration information record position earlier.At this moment, in order the information of carrying out to give the identification that operation or information are given the position, the zone of the rough surface form that preferably is shaped.In addition, can also process inlet 2, and give information on the connecting portion 12.
As the adding method of information, for example, can be undertaken by mint-mark, printing, adhesive label etc.Especially, if consider the simplicity cost, then preferably utilize the printing of ink-jetting style.In addition, also can suitably be used in combination mint-mark printing adhesive label etc.
In addition, as the information of giving record, except the expression name of product or batch the mark class, also can comprise the sequence number, cavity sequence number of metal die etc.If additional have such identification marking, then in follow-up operation, it can be used in the inspection sampling of carrying out defect ware etc.
In addition, when the printing adhesive label, can also further increase quantity of information by color separation.
More than, utilize (2-1) and even invention (2-3), even if can obtain very minute sized lens, axial region by one design is with it operated as benchmark, can also make it to have determine with the carrying of in-process or position headed by, and then easier carrying out to the such advantage of the assembling of pick-up device.
Utilize the invention of (2-4),, can not involve optical function portion, can seek the homogenization of operation so influence because be that position with regulation is a benchmark.
Utilize the invention of (2-5), determine, so it is definite precision to carry out the position well because can use an axial region big to carry out the position than optical function portion.
Utilize the invention of (2-6), because can keep (controlling) axial region big, so can easily keep than optical function portion.
Utilize the invention of (2-7), because can keep axial region big to assemble, so can install effectively or assemble than optical function portion.
Utilize the invention of (2-8),,, can not carry out the cut-out of mistake so keep controlling conscientiously because be to be that benchmark cuts off with an axial region big than optical function portion.
Utilizing the invention of (2-9), because be to utilize axial region big than optical function portion to assemble, and is that benchmark cuts off with an axial region big than optical function portion, so can at an easy rate very small lens combination be gone in machine.
Utilize (2-12) and even invention (2-14), and even invention (2-36), owing to be recorded information on the axial region big than optical function portion, so even if small-sized optical function portion also can be used as formed products and makes it to keep various information.If the information that is write down is the metal die sequence number, then can follow the trail of formed products and the relation of the metal die of this formed products that is shaped.In addition, if the information that is write down is the cavity sequence number, trace back tracking in the time of then also can forming about formed products thus.
Utilize the invention of (2-15),,, can not produce the problem that information is separated with formed products so after shaping, both can also can be used for integrally carrying out recording of information in requisition for freely carrying out giving of information because be to utilize mint-mark to carry out recording of information.
Utilize the invention of (2-16),,, can not produce the problem that information is separated with formed products so after shaping, both can also can be used for integrally carrying out recording of information in requisition for freely carrying out giving of information because be to utilize printing to carry out recording of information.Especially, if utilize the ink-jetting style information of carrying out to give, then can also further increase quantity of information by color separation.
Utilize the invention of (2-17), because be to carry out recording of information by adhesive label, so after the shaping, can be in requisition for freely carrying out giving of information.In addition, can also further increase quantity of information by color separation.
Utilize the invention of (2-18), can easily be shaped has the formed products of an axial region, connecting portion, optical function portion.
Utilize the invention of (2-19),, be formed with three-dimensional identification marking simultaneously, so the use after being shaped is easy because when being shaped.
Utilize the invention of (2-20), because the resin flow Inbound is a linearity, resin flow is good.
Utilize the invention of (2-21), because the resin flow Inbound is continuous and linearity, so resin flow is good.
Utilize the invention of (2-22), because be the resin flow channel that quadrature is provided with, so can constitute metal die three-dimensionally.
Utilize the invention of (2-25) and the invention of claim 37, because be to be shaped circularly to prop up the section configuration of axial region, so be easy to make the resin flow circulation passage.
Utilize the invention of (2-26) and invention (2-38), because be the approximate trapezoid ground section configuration of an axial region that is shaped, so stable formed products can be shaped mounting the time.
Utilize the invention of (2-27) and invention (2-39), because be the approximate half-circular ground section configuration of an axial region that is shaped, so stable formed products can be shaped mounting the time.
Utilize the invention of (2-28) and invention (2-40), the simplicity of design of metal die is easy to increase the position.
Utilize the invention of (2-29) and invention (2-41), owing on an axial region, be formed with protuberance, so that the maintenance of formed products or carrying become is easy.
Utilize the invention of (2-30) and invention (2-42), owing on an axial region, be formed with recess, so that the maintenance of formed products or carrying become is easy.
Utilize the invention of (2-31) and invention (2-43), concentrate portion, become easy so cut off owing to be formed with stress.
Utilize (2-34) and even invention invention (2-35) because the weight beyond the optical function portion is greater than optical function portion, so can stably keep.
Utilize the invention of (2-44),, can easily cut off by prop up the action of axial region with respect to inclined light shaft.
Utilize the invention of (2-45), on optical axis direction, do not make an axial region motion ground, action, can easily cut off by tilting to prop up axial region with respect to optical function portion.
Claims (23)
1. optical forming piece comprises:
Prop up axial region, have first xsect;
Connecting portion integrally is installed to this axial region, extends axially at an axial region, has second xsect less than first xsect; And
The optical function parts integrally are installed to this connecting portion; Wherein
The diameter of above-mentioned optical function parts is littler than the amplitude of first xsect of above-mentioned axial region.
2. according to the optical forming piece of claim 1, it is characterized in that the weight sum of an axial region and connecting portion is greater than the weight of optical function parts.
3. according to the optical forming piece of claim 1, it is characterized in that, the weight sum of axial region and connecting portion be the optical forming piece general assembly (TW) 70% or more.
4. according to the optical forming piece of claim 1, further comprise:
Information recording part spare is provided on the axial region.
5. according to the optical forming piece of claim 1, further comprise:
Information recording part spare is provided on the connecting portion.
6. according to the optical forming piece of claim 1, it is characterized in that the section morphology of an axial region roughly is circular.
7. according to the optical forming piece of claim 1, it is characterized in that the section morphology of an axial region roughly is trapezoidal.
8. according to the optical forming piece of claim 1, it is characterized in that the section morphology of an axial region roughly is semicircle.
9. optical forming piece according to Claim 8 is characterized in that, forms the parallel plane portion that is roughly parallel to semicircle string portion on the part of the semicircular arc portion of axial region.
10. according to the optical forming piece of claim 9, it is characterized in that, form teat in parallel plane portion, it is outstanding from parallel plane portion, and it is trapezoidal that shape is roughly quadrangular pyramid.
11. optical forming piece according to claim 10, it is characterized in that, teat has four sides, be included in a pair of length direction side that also stands facing each other mutually on the length direction of an axial region and a pair of cross direction side that also stands facing each other mutually on cross direction, making the angle between length direction side and the parallel plane portion is 45 ° or littler.
12. optical forming piece according to Claim 8 is characterized in that, the normal of semicircle string portion is roughly consistent with the optical axis on the optical function surface of optical function parts.
13. the optical forming piece according to claim 1 is characterized in that, forms teat on an axial region.
14. the optical forming piece according to claim 13 is characterized in that, teat to be shaped as quadrangular pyramid trapezoidal.
15. the optical forming piece according to claim 13 is characterized in that, chamfering is carried out in the bight of teat.
16 optical forming pieces according to claim 1 is characterized in that, form recess on an axial region.
17. the optical forming piece according to claim 1 is characterized in that, forms the stress concentrated part on connecting portion.
18. the optical forming piece according to claim 17 is characterized in that, the stress concentrated part is the V-arrangement recess, and it forms direction perpendicular to the optical axis on the optical function surface of optical function parts.
19. the optical forming piece according to claim 17 is characterized in that, the stress concentrated part is the V-arrangement recess, and it forms the optical axis direction on the optical function surface that direction roughly is equal to the optical function parts.
20. the optical forming piece according to claim 1 is characterized in that, the distance according to optical function parts optical axis center provides graticule portion on connecting portion.
21. the optical forming piece according to claim 20 is characterized in that, forms graticule portion thereby carve mark on connecting portion.
22. the optical forming piece according to claim 20 is characterized in that, thereby forms graticule portion from the outstanding mark of connecting portion.
23. the optical forming piece according to claim 20 is characterized in that, makes graticule portion form the straight line that extends along the connecting portion Width.
24. the optical forming piece according to claim 20 is characterized in that, the radius that graticule portion is formed have appointment, center are at the track of the circle of optical axis.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP236797/2001 | 2001-08-03 | ||
| JP2001236797A JP2003043349A (en) | 2001-08-03 | 2001-08-03 | Optical pickup lens |
| JP279636/2001 | 2001-09-14 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021274045A Division CN1279373C (en) | 2001-08-03 | 2002-07-31 | Small optical pick-up lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1975469A CN1975469A (en) | 2007-06-06 |
| CN100472233C true CN100472233C (en) | 2009-03-25 |
Family
ID=19068002
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610138877A Expired - Fee Related CN100595050C (en) | 2001-08-03 | 2002-07-31 | Optical formed article processing method |
| CNB2006101388768A Expired - Fee Related CN100472233C (en) | 2001-08-03 | 2002-07-31 | Optical pickup lens |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610138877A Expired - Fee Related CN100595050C (en) | 2001-08-03 | 2002-07-31 | Optical formed article processing method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003043349A (en) |
| CN (2) | CN100595050C (en) |
Families Citing this family (11)
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|---|---|---|---|---|
| JP2006327147A (en) * | 2005-05-30 | 2006-12-07 | Fujinon Corp | Forming method of plastic lens and plastic lens |
| JP4821530B2 (en) * | 2006-09-19 | 2011-11-24 | Ｊｓｒ株式会社 | Thin optical lens |
| JP2008114405A (en) * | 2006-11-01 | 2008-05-22 | Jsr Corp | Method for producing thin optical lens molding |
| JP2008213397A (en) * | 2007-03-07 | 2008-09-18 | Konica Minolta Opto Inc | Resin molding mold, optical element and optical pickup apparatus |
| JP5031485B2 (en) * | 2007-08-20 | 2012-09-19 | 株式会社リコー | Plastic lens, optical scanning device, and image forming apparatus |
| JPWO2011108322A1 (en) * | 2010-03-03 | 2013-06-24 | コニカミノルタ株式会社 | Optical molded body, mold for optical molded body, and method for handling optical molded body |
| JP5725958B2 (en) * | 2011-04-22 | 2015-05-27 | キヤノン株式会社 | Focus detection apparatus and optical instrument |
| TWI476453B (en) * | 2012-05-18 | 2015-03-11 | Largan Precision Co Ltd | Plastic optical lens |
| US9019637B2 (en) * | 2012-11-13 | 2015-04-28 | Largan Precision Co., Ltd. | Plastic lens barrel and method for manufacturing the same |
| WO2016098833A1 (en) * | 2014-12-17 | 2016-06-23 | コニカミノルタ株式会社 | Optical element and light source device |
| CN105445940A (en) * | 2016-01-15 | 2016-03-30 | 厦门根号叁动漫科技有限公司 | VR glasses used in cooperation with a handset |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1974174A (en) | 2007-06-06 |
| JP2003043349A (en) | 2003-02-13 |
| CN1975469A (en) | 2007-06-06 |
| CN100595050C (en) | 2010-03-24 |
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