CN1331003C - Projection lamp bulb and projection lamp using said bulb - Google Patents
Projection lamp bulb and projection lamp using said bulb Download PDFInfo
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- CN1331003C CN1331003C CNB2004100865559A CN200410086555A CN1331003C CN 1331003 C CN1331003 C CN 1331003C CN B2004100865559 A CNB2004100865559 A CN B2004100865559A CN 200410086555 A CN200410086555 A CN 200410086555A CN 1331003 C CN1331003 C CN 1331003C
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- lamp bulb
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/025—Associated optical elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
Abstract
The present invention discloses The present invention relates to a projection lamp bulb applied in projection systems, which comprises a bulb body, two electrodes and two glass columns connected with the bulb body, wherein the bulb body is positioned in the middle. The two electrodes are respectively positioned on the two sides of the bulb body, and one end of each electrode is arranged inside the bulb body, with another end of each electrode led outside the bulb body and the glass column, wherein the bulb body is in a pipe shape. The projection lamp bulb in the projection lamp provided by the present invention cooperates with an aspherical reflection mirror in a transversely loaded mode. Thus, light ray uniformity is enhanced, the processing cost and the material cost of a curved-surface reflector is reduced, and the service life of the curved-surface reflector can be prolonged.
Description
Technical field
The present invention relates to optical field, particularly relate to a kind of projection lamp that is applied to the projection lamp bulb in the optical projection system and adopts this kind bulb.
Background technology
Along with the development of shadow casting technique, be widely used in people's work and the study such as the optical projection system of various ways such as slide projector, projector, projection TV, film projector and real object exhibition booth.Projection lamp in the optical projection system comprises a projection lamp bulb (light source) and an inside surface curved reflector (to call curved reflector in the following text).At present, the projection lamp bulb adopts gas-discharge lamp usually, for example Metal halogen lamp (being metal halide lamp), ultrahigh pressure mercury lamp etc.So-called gas-discharge lamp refers to the steam that fills compositions such as an amount of mercury and/or metal halide in the foam, and described steam produces arc discharge and luminous discharge lamp under the effect of electrode voltage.Thereby foam is exactly the luminous component of gas-discharge lamp.The projection lamp bulb cooperates with curved reflector, so that the light that the projection lamp bulb sends throws away towards the direction of appointment, further processes for subsequent optical path.Wherein, curved reflector comprises spherical reflector (hereinafter to be referred as spherical mirror), ellipsoidal mirror (hereinafter to be referred as ellipsoidal mirror) and parabolic mirror (hereinafter to be referred as paraboloidal mirror) etc.In actual applications, the projection lamp bulb is usually located at the focal position of curved reflector, and promptly the foam of projection lamp is usually located at the focal position of curved reflector.Usually, the projection lamp bulb can be divided into two kinds of single-ended and both-ends.The main dual-end bulb that adopts in the existing optical projection system.So-called dual-end bulb refers to the two ends that foam occupy middle part, foam and draws long electrode; And 2 electrodes are wrapped up by glass column respectively.
In the prior art, the foam shape of dual-end bulb generally has spherical and two kinds of elliposoidals.So-called spherical foam refers to, and described foam is rounded in the projection that is parallel on the plane of pole axis.So-called elliposoidal foam refers to, and described foam is at the projection ovalize that is parallel on the plane of pole axis.At this, pole axis refers to the line between interior two electrode tips of foam.
See also Fig. 1 a, the projection lamp bulb comprises 110, two electrodes 120 of elliposoidal foam and glass column 130.Wherein, elliposoidal foam 110 is positioned at middle part, the two ends extraction electrode 120 of elliposoidal foam 110.And described electrode 120 is wrapped in the glass column 130.
See also Fig. 1 b, the projection lamp bulb comprises 160, two electrodes 180 of spherical foam and glass column 170.Wherein, spherical foam 160 is positioned at middle part, the two ends extraction electrode 180 of spherical foam 160.And described electrode 180 is wrapped in the glass column 170.
At present, the fit system of projection lamp bulb and curved reflector has straight dress and horizontal dress dual mode.Wherein, straight dress refers to electrode and light shaft coaxle, and foam is on optical axis, and this mode is applicable to single-ended and the both-end projection lamp; It is vertical with optical axis that horizontal dress refers to electrode, and foam is on optical axis.
See also Fig. 2, the projection lamp bulb adopts horizontal dress mode to match with spherical mirror 210.Just the foam 220 of projection lamp is positioned at the focal point F of spherical mirror 210, and the glass column 230 of electrode at two ends (not label) and parcel electrode lays respectively at the both sides of optical axis, and perpendicular to optical axis.Because spherical mirror has such characteristic: promptly, after the spherical mirror reflection, can converge at focus again from the light of spherical mirror focus.Like this, after inside surface 240 reflections of spherical mirror 210, can get back to foam 220 positions again, and launch, not be reflected onto on the glass column 230 and do not have light in foam 220 positions from the light of foam 220.This shows that when the projection lamp bulb adopted horizontal dress mode to match with spherical mirror, the glass column 230 at foam 220 two ends can not stop light.Therefore, in actual applications, the projection lamp bulb adopts horizontal dress mode to cooperate with spherical mirror usually.
See also Fig. 3, the projection lamp bulb adopts horizontal dress mode to match with ellipsoidal mirror 310.Just the foam 330 of projection lamp bulb is positioned at first focal point F 1 of ellipsoidal mirror 310, and the glass column 320 of electrode at foam 330 two ends (not label) and parcel electrode lays respectively at the both sides of optical axis, and perpendicular to optical axis.Because ellipsoidal mirror has such characteristic: promptly, after the ellipsoidal mirror reflection, converge at second focus from the light of ellipsoidal mirror first focus.Therefore, after inside surface 340 reflections of spherical mirror 310, partial reflection light directly converges at second focal point F 2 from the light of foam 330; The partial reflection ray cast outwards exhales after foam 330 refractions, and can not arrive second focal point F 2, thereby can not be utilized to foam 330; Also have the partial reflection ray cast to glass column 320, after glass column 320 refractions, outwards exhale, can not arrive second focal point F 2 equally, can not be utilized equally.
See also Fig. 4, dash area 420 is shades that the projection lamp bulb is produced on the plane perpendicular to optical axis.In actual applications,, on the foam and glass column of projection lamp bulb, and be refracted and outwards exhale from the ray cast of curved reflector, thereby can not be utilized.Thereby the projection lamp bulb will produce shade on perpendicular to the plane of optical axis.
In actual applications, after ellipsoidal mirror and paraboloidal mirror reflection, the partial reflection ray cast all can be arranged on the foam and glass column of projection lamp bulb, and be refracted and exhale, thereby can not be utilized from the light of projection lamp bulb.Like this, in perpendicular to the projection on the plane of optical axis, all there is as shown in Figure 4 dash area.So the projection lamp bulb of present sphere and elliposoidal foam can not adopt horizontal dress mode and ellipsoidal mirror and paraboloidal mirror to be used.
The size of shade is relevant with the size of the orthogonal projection of foam on the plane that is parallel to projection lamp bulb pole axis.Because the electric arc that produces between two electrodes of projection lamp bulb is spindle, during projection lamp work, except electric arc produced heat, two electrodes also can produce heat.Shown in Fig. 1 a, near 120 temperature of position electrode shown in the frame of broken lines were very high in the drawings when the projection lamp bulb was luminous, the temperature at this place is enough to make the glass deformation that constitutes foam 110 or break, therefore electrode 120 must keep a determining deviation with the foam 110 of bulb at this position, prevents that electrode and electric arc from scorching distortion to this place's foam glass simultaneously.Again because, under certain power and electrode separation condition, foam 110 is certain in the length of projection lamp pole axis direction, promptly the diameter of spherical foam is certain under this condition, and also be certain for the major axis of elliposoidal foam, its foam is having a ultimate value perpendicular to the diameter on the pole axis direction like this, the part and 120 at the electrode that are positioned at frame of broken lines with foam 110 among assurance Fig. 1 a have enough spacings, for example the gas-discharge lamp with 100W is an example, when the pole span of electrode during in the 1mm left and right sides, the external diameter of elliposoidal foam is not less than 9mm, and this can be described as a present technological limit.When pole span increases to more than the 4mm, the electric arc of spindle-type is also wanted corresponding increase, and foam also increases thereupon, if continue to use the elliposoidal foam, external diameter will reach more than the 13mm, and the diameter of spherical foam is then bigger.Therefore, the shade of elliposoidal foam is less than sphere under the similarity condition, but still is not enough to eliminate shade.
Therefore, in the prior art, in order to eliminate the shade that is produced when both-end projection lamp bulb adopts horizontal dress mode to cooperate with ellipsoidal mirror and paraboloidal mirror, both-end projection lamp bulb is normal to adopt straight dress mode to cooperate with ellipsoidal mirror and paraboloidal mirror.
See also Fig. 5, the projection lamp bulb adopts straight dress mode to match with ellipsoidal mirror 510.Just the foam 530 of projection lamp bulb is positioned at first focal point F 1 of ellipsoidal mirror 510, the glass column 520 and the light shaft coaxle of electrode at foam two ends (not label) and parcel electrode.After inside surface 540 reflections of spherical mirror 510, light directly converges at second focal point F 2 and is utilized from the light of foam 530.Thereby this fit system can not produce dash area as shown in Figure 4 on perpendicular to the plane of optical axis.
In actual applications, if the projection lamp bulb adopts straight dress mode to match with paraboloidal mirror.Just the foam of projection lamp bulb is positioned at the focal point F of paraboloidal mirror, the glass column and the light shaft coaxle of electrode at foam two ends (not label) and parcel electrode.Such fit system can not produce dash area as shown in Figure 4 equally on perpendicular to the plane of optical axis.
As seen from the above, the projection lamp bulb adopts straight dress mode to match with ellipsoidal mirror and paraboloidal mirror, can avoid producing shade.Yet, in actual applications, because the glass column at foam two ends produces refraction to light, in order to make light project the reflecting surface of curved reflector as much as possible to be utilized (just from foam, improve the utilization ratio of light), have short focal length with regard to the curved reflector that requires to match with projection lamp.But the curved reflector that matches with the projection lamp bulb has short focal length will cause following problems:
One, the light uniformity coefficient is lower.The projection lamp that prior art provides matches and adopt the projection lamp bulb directly to adorn the same curved reflector of mode (particularly ellipsoidal mirror and paraboloidal mirror) for fear of producing shade.And,, need curved reflector to have short focal length in order to improve the utilization ratio of light.Yet, short focal length will make the projection lamp bulb that is positioned at focus too near the bottom of curved reflector, cause a large amount of light all to concentrate the bottom that projects curved reflector, the light center brightness that causes curved reflector to reflect away is the several times of marginal ray brightness, and the light uniformity coefficient is lower.
Its two, whole cost height.The projection lamp that prior art provides is directly adorned mode same curved reflector (particularly ellipsoidal mirror and paraboloidal mirror) when matching and adopt with the projection lamp bulb for fear of producing shade, just requires curved reflector to have short focal length.Because projection lamp is positioned at the position of camber reflection mirror foci, and the temperature of projection lamp bulb self is higher.Therefore, concentrate in the curved reflector from the heat of projection lamp bulb and be difficult to leave, make curved reflector need bear higher temperature.The curved reflector that adopts common material to make is difficult to bear above-mentioned high temperature, the phenomenon of breaking or being out of shape usually can occur.Therefore, the curved reflector that matches with the projection lamp bulb in the existing optical projection system need adopt high temperature resistant and low-expansion material, and this makes the material cost of curved reflector and processing cost all higher, and difficulty of processing is bigger.
Its three, the curved reflector that cooperates with the projection lamp bulb is shorter serviceable life.The projection lamp that prior art provides matches and adopt the projection lamp bulb directly to adorn the same curved reflector of mode (particularly ellipsoidal mirror and paraboloidal mirror) for fear of producing shade, and requires curved reflector to have short focal length.In actual applications, short focal length will cause curved reflector to bear higher temperature.Usually, the inside surface of the curved reflector that matches with projection lamp all is coated with one deck reflectance coating, in order to improve reflection efficiency.But, reflectance coating at high temperature the life-span generally lower.Projection lamp that prior art provides adopts the projection lamp bulb directly to adorn mode and matches with curved reflector, will cause the reflectance coating of curved reflector to shorten greatly serviceable life, even obscission occur, and then shorten serviceable life.
Summary of the invention
The technical matters that the present invention solves is: a kind of projection lamp bulb is provided, when this projection lamp bulb adopts horizontal dress mode to match with curved reflector, can avoid producing shade, improve the light uniformity coefficient, simultaneously, can also reduce the processing cost and the material cost of curved reflector, and prolong the serviceable life of curved reflector.
For this reason, the technical scheme of technical solution problem of the present invention is:
A kind of projection lamp bulb that is applied in the optical projection system is provided, has comprised foam, two electrodes and two glass columns that link to each other with foam; Described foam is positioned at the middle part, and two electrodes lay respectively at the both sides of foam, and each electrode has an end to place in the foam, and the other end is drawn outside foam and the glass column; Wherein, described foam is tubular.
Further, described foam can be elongated glass tube.
Described foam can be the nature transitional form with being connected of glass column.
The present invention also provides a kind of projection lamp in the optical projection system of being applied to that adopts above-mentioned projection lamp bulb, comprise projection lamp bulb and the non-spherical reflector that is mated, described projection lamp adopts horizontal dress mode to match with non-spherical reflector, described projection lamp bulb comprises foam, two electrodes and two glass columns that link to each other with foam, described foam is positioned at the middle part, two electrodes lay respectively at the both sides of foam, and each electrode has an end to place in the foam, the other end is drawn outside foam and the glass column, it is characterized in that described foam is tubular.
Described non-spherical reflector can be ellipsoidal mirror or parabolic mirror; It also can be facetted mirrors; Described facetted mirrors comprises the combination of spherical reflector and ellipsoidal mirror, or the combination of spherical reflector and parabolic mirror.
With respect to prior art, the invention has the beneficial effects as follows:
The first, the light high conformity of projection lamp bulb.Because the projection lamp bulb adopts tubular foam, the tubular foam elongated and narrow of projection lamp bulb, the diameter of whole foam can less (less than the maximum gauge of spindle electric arc), the shape of foam restriction electric arc is extended along the foam length direction, and because of foam diameter unanimity, so each several part is luminous relatively more consistent.
The second, projection lamp light good evenness.Because the distribution of light of projection lamp bulb trend of purchasing curved reflector is more even, owing to adopt curved reflector (particularly ellipsoidal mirror and paraboloidal mirror) in projection lamp bulb and the optical projection system in the projection lamp provided by the invention when matching, need not to resemble and significantly shorten the distance of projection lamp and curved reflector bottom or the focal length of shortening curved reflector the prior art.Thereby the light that the projection lamp bulb sends can not compile to the middle part of curved reflector too much.Like this, the ray cast that the projection lamp bulb sends will be more even to the distribution of reflecting surface, and the light that reflecting surface reflects is the also corresponding raising of light uniformity coefficient that projection lamp sends.
The 3rd, avoid projection lamp to produce shade.Because the foam of projection lamp bulb provided by the invention is tubular foam, in the spherical foam that provides much smaller than prior art perpendicular to the projected area on the plane of bulb pole axis or the projected area of elliposoidal foam.Like this, when the projection lamp bulb in the projection lamp provided by the invention adopted horizontal dress mode to match with curved reflector, the dash area that tubular foam produces was far smaller than the shade that projection lamp produced that prior art provides.Thereby, just can avoid producing shade as long as suitably adjust the distance of foam bottom curved reflector, and need not to resemble the focal length that shortens curved reflector the prior art.
The 4th, the whole cost of projection lamp is low.Owing to adopt the projection lamp bulb in the projection lamp provided by the invention to match with curved reflector (particularly ellipsoidal mirror and paraboloidal mirror) in horizontal dress mode, need not to resemble shorten focal length the existing projection lamp, the straight dress mode of employing matches with ellipsoidal mirror and paraboloidal mirror.Therefore, the projection lamp bulb in the projection lamp provided by the invention is far away relatively apart from curved reflector, and the temperature from projection lamp that curved reflector bears is also just corresponding lower.Thereby curved reflector is not prone to the phenomenon of breaking and being out of shape.Thereby curved reflector just need not to adopt high temperature resistant and low-expansion material (as devitrified glass), and this will reduce the material cost of curved reflector.In addition, owing to adopt common material, make the also corresponding reduction of difficulty of processing and cost.Thereby, reduced whole cost.
The 4th, long service life.Because when the projection lamp bulb in the projection lamp provided by the invention matches with curved reflector, need not to resemble and shorten focal length the prior art, to compare with prior art, the projection lamp bulb is far away relatively apart from the distance bottom the curved reflector.Thereby the curved reflector bottom temp can be not overheated, and integral body is heated evenly.Like this, the reflectance coating that is coated with of the inside surface of curved reflector can not bear higher temperature.Therefore, can obtain the serviceable life of reflectance coating and catoptron prolonging.Simultaneously, because reflectance coating need not to bear higher temperature, thereby, reflective film material is required to reduce, can suitably reduce the projection lamp cost equally.
Above-mentioned effect of the present invention is more obvious during greater than 4mm at the pole span of projection lamp bulb electrode.
Description of drawings
Fig. 1 a is the elliposoidal foam structure synoptic diagram of existing projection lamp bulb;
Fig. 1 b is the spheric bulb body structure synoptic diagram of existing projection lamp bulb;
Fig. 2 is the synoptic diagram that spherical foam projection lamp bulb adopts horizontal dress mode to match with spherical reflector in the projection lamp;
Fig. 3 is the synoptic diagram that spherical foam projection lamp bulb adopts horizontal dress mode to match with ellipsoidal mirror in the projection lamp;
Fig. 4 is in the perspective view perpendicular to optical axial plane when the projection lamp bulb adopts horizontal dress mode to match with aspheric mirror in the existing projection lamp;
Fig. 5 is the synoptic diagram that the projection lamp bulb of spherical foam in the projection lamp adopts straight dress mode to match with ellipsoidal mirror;
Fig. 6 is the structural representation of projection lamp bulb of the present invention;
Fig. 7 is that the projection lamp bulb structure of spherical foam, elliposoidal foam and tubular foam compares synoptic diagram;
Fig. 8 is the structural representation of projection lamp of the present invention.
Embodiment
Embodiment 1
Seeing also Fig. 6, is the structural representation of projection lamp bulb of the present invention.Projection lamp bulb of the present invention comprises tubular foam 610, electrode 620 and glass column 630.Wherein, tubular foam 610 is positioned at middle part, the two ends extraction electrode 620 of tubular foam 610.And electrode 620 is wrapped in the glass column 630.Described tubular foam 610 is square in the cross section that is parallel to the pole axis plane, rounded perpendicular to the cross section on pole axis plane.Because the pipe of the similar hollow of described foam 610 shapes is so be called tubular foam.Wherein, full an amount of high-pressure mercury steam, the perhaps steam of metal halide in the tubular foam 610.Certainly, also can fill an amount of mercury and the mixed vapour of metal halide, perhaps other can produce arc discharge and luminous steam under the electrode voltage effect.
Owing to adopt tubular foam, the minimum diameter that the highest temperature region of electrode when the minimum diameter of foam is decided by electrode discharge (zone among Fig. 1 a in the frame of broken lines) foam allows, therefore under the pole span condition of same power and electrode, guarantee the tubular foam in this zone on the pole axis vertical direction diameter and oval foam diameter all meet permission minimum foam diameter the time, the diameter of foam is less than the diameter of oval foam foam middle part maximum on perpendicular to the pole axis direction when adopting tubular foam, i.e. tubular foam diameter minimum on the pole axis vertical direction, oval foam big it, circular foam maximum, for example when the electrode pole span be that 4mm is when above, tubular foam minimum diameter is 9mm, ellipse is more than the 13mm, sphere is more than the 14mm, and pole span is big more, power is big more, and gap is big more.
Seeing also Fig. 7 is that spherical foam, elliposoidal foam and the tubular foam texture ratio under same power and electrode pole span condition is than synoptic diagram.Tubular foam 710 is square in the cross section that is parallel to the pole axis plane, and rounded perpendicular to the cross section on pole axis plane, and each cross-sectional sizes equates.Elliposoidal foam 730 is being parallel to the cross section ovalize on pole axis plane, and rounded perpendicular to the cross section on pole axis plane, and each cross-sectional sizes does not wait.Spherical foam 720 is rounded in the cross section that is parallel to the pole axis plane, and rounded perpendicular to the cross section on pole axis plane, and each cross-sectional sizes does not wait.
As shown in Figure 7, the profile of tubular foam 710 is less than the profile of elliposoidal foam 730, and the profile of elliposoidal foam 730 is less than the profile of spherical foam 720.Be understandable that, on plane perpendicular to optical axis, the projected area minimum of tubular foam 710, the projected area maximum of spherical foam 720, the projected area of elliposoidal foam 730 is between the projected area of the projected area of tubular foam 710 and spherical foam 720.
It is pointed out that in the projection lamp provided by the invention that tubular foam can be natural arbitrarily intermediate shape with being connected of glass column.For example can adopt smooth arc transition form, also can adopt the straight transitions form.
The shape of glass column that further it is pointed out that the parcel electrode also can adopt various ways, as long as can heatproof, can wrap up electrode, and the effect of playing insulation gets final product.
Embodiment 2
As shown in Figure 8, the projection lamp in the present embodiment comprises a projection lamp bulb and the non-spherical reflector 810 that cooperates with the projection lamp bulb as light source, and the projection lamp bulb comprises tubular foam 910, electrode 920 and glass column 930.Wherein, tubular foam 910 is positioned at middle part, the two ends extraction electrode 920 of tubular foam 910.And electrode 920 is wrapped in the glass column 930.Described tubular foam 910 is square in the cross section that is parallel to the pole axis plane, rounded perpendicular to the cross section on pole axis plane.Because the pipe of the similar hollow of described foam 910 shapes is so be called tubular foam.Wherein, full an amount of high-pressure mercury steam, the perhaps steam of metal halide in the tubular foam 910.Certainly, also can fill an amount of mercury and the mixed vapour of metal halide, perhaps other can produce arc discharge and luminous steam under the electrode voltage effect.Tubular projection lamp bulb adopts landscape mode to cooperate with curved reflector.Non-spherical reflector can be ellipsoidal mirror or parabolic mirror; Also can be facetted mirrors, i.e. the combination of combination of spherical reflector and ellipsoidal mirror, or spherical reflector and parabolic mirror.
Be parallel to projection on the plane of pole axis less than the elliposoidal or the spherical foam of same specification owing to adopt the projection lamp bulb of tubular foam structure to have, and having the uniform characteristics of light,
Because the projection lamp bulb in the projection lamp provided by the invention has cast foam 910, on the plane perpendicular to pole axis, the projected area of tubular foam 910 is much smaller than the elliposoidal foam under same power and electrode pole span condition or the projected area of spherical foam.Therefore, the shade that produced of tubular foam 910 is little more a lot of than the shade that the spherical foam or the elliposoidal foam of same pole span produced.And even suitably strengthen the pole span of tubular foam 910, it is long narrow that foam is done it thinly, and the dash area that cast foam 910 is produced can be very not big yet.In addition, because the tubular foam 910 of elongated and narrow has bigger pole span, the ray cast curved reflector will be more even.Thereby, can eliminate dash area as long as suitably adjust cast foam 910 with the distance (just cast foam 910 slightly being moved to the non-spherical reflector bottom) of curved reflector bottom.Projection lamp provided by the invention can be eliminated shade as long as deflect away from less distance from the focal position.Because it is less that projection lamp departs from the distance of non-spherical reflector focus, when this has reduced to adopt projection lamp provided by the invention equally and has used horizontal dress mode to match with non-spherical reflector to the influence of uniformity coefficient.Certainly, in actual applications, in order to keep uniformity coefficient preferably, the foam of projection lamp departs from few more well more from the focal position, be advisable just to eliminate shade.
Certainly, in actual applications, the shape of electrode or two distance between electrodes also can be looked actual conditions and difference.Two distance between electrodes can be suitably strengthened,, also two distance between electrodes can be suitably shortened, to reduce the foam volume of projection lamp to improve the uniformity coefficient of light beam.As long as can on plane, avoid producing shade perpendicular to optical axis.
In actual installation is used, if when adopting elliposoidal foam 730 shown in Figure 7 or spherical foam 720 to adopt horizontal dress mode to match with curved reflector, by shortening the distance of foam and curved reflector bottom, be that elliposoidal foam 730 or spherical foam 720 depart to curved reflector from the focal position, light is slightly compiled to the middle part, thereby effectively eliminate the shade that glass column brings.But, the brightness of beam center position is significantly improved, uniformity coefficient descends, so that be difficult to be utilized in subsequent optical path.In order effectively to alleviate this point, can the interior interelectrode distance (pole span) of proper extension foam.But behind the elongation pole span, the foam volume is corresponding can be increased.Like this, the shade of foam generation itself also can correspondingly increase.Thereby, in actual use, still should not use horizontal dress mode to cooperate with it for ellipsoidal mirror or paraboloidal mirror.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. projection lamp that is applied in the optical projection system, comprise projection lamp bulb and the non-spherical reflector that is mated, it is characterized in that: described projection lamp adopts horizontal dress mode to match with non-spherical reflector, described projection lamp bulb comprises foam, two electrodes and two glass columns that link to each other with foam, described foam is positioned at the middle part, two electrodes lay respectively at the both sides of foam, and each electrode has an end to place in the foam, the other end is drawn outside foam and the glass column, and described foam is tubular.
2. projection lamp according to claim 1 is characterized in that: described non-spherical reflector is ellipsoidal mirror or parabolic mirror.
3. projection lamp according to claim 1 is characterized in that: described non-spherical reflector is a facetted mirrors; Described facetted mirrors comprises the combination of spherical reflector and ellipsoidal mirror, or the combination of spherical reflector and parabolic mirror.
4. projection lamp according to claim 1 is characterized in that: described foam is elongated glass tube.
5. projection lamp according to claim 1 is characterized in that: described foam is the nature transitional form with being connected of glass column.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100865559A CN1331003C (en) | 2004-10-25 | 2004-10-25 | Projection lamp bulb and projection lamp using said bulb |
| PCT/CN2005/001388 WO2006045232A1 (en) | 2004-10-25 | 2005-09-02 | Projection lamp bulb and projection lamp with the bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100865559A CN1331003C (en) | 2004-10-25 | 2004-10-25 | Projection lamp bulb and projection lamp using said bulb |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1588606A CN1588606A (en) | 2005-03-02 |
| CN1331003C true CN1331003C (en) | 2007-08-08 |
Family
ID=34605178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100865559A Expired - Fee Related CN1331003C (en) | 2004-10-25 | 2004-10-25 | Projection lamp bulb and projection lamp using said bulb |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1331003C (en) |
| WO (1) | WO2006045232A1 (en) |
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| CN2713513Y (en) * | 2004-07-27 | 2005-07-27 | 罗筱泠 | Projection lamp |
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| CN86207023U (en) * | 1986-09-16 | 1987-12-09 | 国营曙光仪器厂 | High brightness slide projector |
| CN2066620U (en) * | 1990-03-29 | 1990-11-28 | 苏州电光源厂 | Intensive brightness bubular dy lamp |
| DE4327534A1 (en) * | 1993-08-16 | 1995-02-23 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Metal halide discharge lamp for photo-optical purposes |
| JPH07262966A (en) * | 1994-03-22 | 1995-10-13 | Toshiba Lighting & Technol Corp | Rare gas discharge lamp and lighting system using the same |
| US6400076B1 (en) * | 1996-05-14 | 2002-06-04 | General Electric Company | Xenon metal halide lamp having improved thermal gradient characteristics for longer lamp life |
| DE50112946D1 (en) * | 2000-01-14 | 2007-10-18 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | REFLECTOR HIGH PRESSURE DISCHARGE UNIT |
| JP3498072B2 (en) * | 2001-06-25 | 2004-02-16 | 炳霖 ▲楊▼ | Light emitter for discharge lamp |
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2004
- 2004-10-25 CN CNB2004100865559A patent/CN1331003C/en not_active Expired - Fee Related
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2005
- 2005-09-02 WO PCT/CN2005/001388 patent/WO2006045232A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5414600A (en) * | 1993-07-30 | 1995-05-09 | Cogent Light Technologies, Inc. | Condensing and collecting optical system using an ellipsoidal reflector |
| JPH07272617A (en) * | 1994-03-31 | 1995-10-20 | Toshiba Lighting & Technol Corp | Short arc electric discharge lamp, lighting device and illumination device |
| CN1239314A (en) * | 1998-06-12 | 1999-12-22 | 松下电子工业株式会社 | Discharge lamp |
| JP2002055393A (en) * | 2000-08-10 | 2002-02-20 | Nec Corp | Light source device, illuminator and projection type display device |
| CN2713513Y (en) * | 2004-07-27 | 2005-07-27 | 罗筱泠 | Projection lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006045232A1 (en) | 2006-05-04 |
| CN1588606A (en) | 2005-03-02 |
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