CN100480744C - Optical low pass filter and method for producing the same - Google Patents

Abstract

The invention relates to an optical device such as optical low-pass filter and its producing method. It uses insurance contract to contract a plurality of optical sheets. The contract coats the flank or around the plurality of optical sheets to form a protecting layer. The method comprises: coating the contract between the pluralities of optical sheets front side; pressing the plurality of optical sheets so that the contract is flux; coating the flank or around the plurality of optical sheets to form a protecting layer.

Description

Optics low pass filter and the method for producing this device

Technical field

The present invention relates to the production method of optical device and this optical device.Specifically, relate to for example production method of optics low pass filter and this optics low pass filter, it prevents to damage in transportation, boosts productivity simultaneously and output.

Background technology

The optics low pass filter is built in the various electronic equipments that adopt optical system, is positioned at the front of the optical device imager resemble the camera, utilizes their birefringence to prevent that color is fuzzy.In recent years, the electronic equipment of built-in optical system is universal day by day, causes its demand to increase.Therefore, need prevent damage so that optical characteristics can keep definite, and prevent adverse effect other optical device.

Fig. 4-Fig. 6 illustrates the traditional mode of production example of optics low pass filter.

As shown in Figure 5, optics low pass filter 1 comprises that multilayer (for example, 3 layers) optical sheet 1a, 1b, 1c bond together with bonding agent and the lamination of lamination, and optical sheet 1a, 1b, 1c are made of the optical sheet of chip type glass or the crystal that fries batter in a thin layer.For this bonding, can use for example ultraviolet curing bonding agent.

Usually, in the conventional production methods of optics low pass filter, at first, as shown in Figure 4, multi-disc optical crystal chip (by glass or quartzy the composition) is bonded together and lamination obtains the wafer of lamination with bonding agent, then, usefulness is cut saw it is cut into single lamination.

Next, lamination (optics low pass filter 1) is formed a line and is cleaned singly by hand and drying in cleaning equipment, then, and visual inspection.At last, as shown in Figure 5, the one side of optics low pass filter 1 (bottom surface) is fixed on the surface of double sticky tape 3, and double sticky tape 3 also is fixed on the interior seat 2 of packing box, and then, optics low pass filter 1 stores and transportation in the position of fixing, putting upside down.As a result, prevented the vibration in transportation and impacted 1 damage of optics low pass filter, and the contacting of optics low pass filter 1 and miscellaneous equipment.

But in the conventional production methods of above-mentioned optics low pass filter, the optics low pass filter (optical sheet) 1 that problem is made up of lamination must be by operator's alignment one by one manually in cleaning equipment.As shown in Figure 5, another problem is, it is very inefficient one by one optics low pass filter (optical sheet) 1 being put upside down on the seat 2, so throughput rate and yielding poorly down.

Consider these problems, developed the method for cleaning and packing optics low pass filter 1 in batches automatically.But,, worry that therefore damage (for example smashing) is to its edge, particularly in process of production when it contacts with automatic equipment because optics low pass filter 1 is made up of friable material (for example, glass and crystal).And, as shown in Figure 6, when packing optics low pass filter 1, packing box 4 has sulculus, have these sulculuses in the slit, bottom 5 that in packing box 4, forms, for example, each optics low pass filter 1 is by the automatic transmission of preceding working procedure, is attached in the slit 5 with the interarea of this optics low pass filter 1.Yet even in this case, optics low pass filter 1 also can be damaged with the inwall collision in slit 5 owing to the vibration in transportation.This damage causes the fractionlet that is produced by damage to adhere to the middle part of optics low pass filter interarea, and causes the optical property variation.

Specifically, the optics low pass filter 1 of said structure is normally by cutting laminated optical wafer (lamination wafer) and form with cutting sawing.In this case, particularly the cut surface of lamination wafer (cleavage plane) has little and sharp outstanding (burr), and forms zigzag.Therefore, because shock and vibration, these are given prominence to probably and break away from and the formation fractionlet from cut surface.And these fractionlets can cause adverse effect to other electron device that is built in the electronic equipment.

At this, optical device is described as the optics low pass filter of lamination, still, generally can produce identical problem in comprising the optical device of laminar wave plate.

Summary of the invention

The method that the purpose of this invention is to provide a kind of optical device and produce this optical device, it can prevent the damage of transportation, thereby keeps optical characteristics.

Optical device of the present invention scatters and adhesive-applying in the side of multi-disc optical sheet.And bonding agent scatters and coating is the periphery that extends to two interareas from the side around the multi-disc optical sheet.

In addition, the present invention's production method of being used for optical device comprises: form adhesive-applying between the optical sheet interarea of optical device in multi-disc; Two interareas of extruding multi-disc optical sheet flow out bonding agent between the interarea; Bonding agent scattered and is coated to side around optical sheet; Distribution and adhesive-applying are the peripheries that always extends to two interareas from the side around the multi-disc optical sheet.

In optical device of the present invention, scatter on around the side of multi-disc optical sheet and the bonding agent of coating also plays protective material, prevent from transportation, to damage optical sheet fully.And in optical device production method of the present invention, scatter and adhesive-applying the periphery from the periphery of optical sheet to interarea, and efficient operation is automatically carried out.

Description of drawings

Fig. 1 is for example production method example flow diagram of optics low pass filter of optical device of the present invention.

Fig. 2 is the equipment longitdinal cross-section diagram that uses in optical device of the present invention (optics low pass filter) production method example, is used for picking up and push three bonding optical sheets at mould.

Fig. 3 is the skeleton view of optical device of the present invention (optics low pass filter).

Fig. 4 is the conventional production methods process flow diagram of optics low pass filter.

Fig. 5 is the expression traditional optical low pass filter production skeleton view of state afterwards, and optical filter is stored on the seat of packing box reversedly.

Fig. 6 is the vertical view that there is another example in the packing box in optical filter after the production of traditional optical low pass filter.

Embodiment

For example, optical device of the present invention comprises with suitable bonding agent three plate sheet optical sheets (glass, crystal) 1a, 1b, the 1c optics low pass filter 1 that the lamination that forms forms that sticks together for example.

At this,, at first, with the above-mentioned saw of cutting per three optical crystal chips of being made by thin slice are cut into single optical sheet 1a, 1b, 1c, as depicted in figs. 1 and 2 in order to produce optical device (optics low pass filter) 1.Next, on coating bonding agent 6, the second optical sheet 1b are laminated on the first optical sheet 1a.Then, on coating bonding agent 6, the three optical sheet 1c are laminated on the second optical sheet 1b.Then, by retention gap g1, g2 in a mould 8, with these optical sheets 1a, the bonding and lamination of 1b, 1c, mould 8 can be adorned removable, constitute by four slurcams, wherein on inner bottom surface, have as square or circular outstanding 7 of support section with the wall (frame wall) that moves along four direction.For mould 8, the shape on plane can be side C shape movably with the frame wall.

Next, three optical sheet 1a, 1b, the 1c that is layered in the mould 8 pressurizeed from upper surface with predetermined pressure.That is, between two interarea S and S ',, make bonding agent 6 flow out to side around optical sheet 1a, 1b, 1c to optical sheet 1a, 1b, 1c pressurization.In this case, gap g1 and g2 with between bonding agent 6 fill molds 8 and the optical sheet make the outside of bonding agent 6 around two interareas (upper surface and lower surface) of three optical sheet 1a, 1b, 1c.In this state, with ultraviolet curing bonding agent 6 to form thin protective finish (for example, thickness is approximately 20 microns).At last, open and remove mould along four direction.

Therefore, can obtain the optics low pass filter, the adhesive applicating of this optics low pass filter is in the side around optical sheet 1a, 1b, 1c.Can scatter and apply the bonding agent of minimum thickness (for example, being approximately 20 microns) in the periphery (end face and periphery, bottom surface) of two interareas of optical sheet 1a and 1c up and down.

According to this structure, bonding agent particularly covers and protects the crestal line of optical sheet 1a, 1b, 1c extending continuously around optical sheet 1a, the 1b of optics low pass filter 1 of the present invention, side and the peripheral of upper and lower interarea of 1c.Specifically, in this example,, cover and protected sharp outstanding (burr) that form in the optical sheet outside owing to optical sheet 1a, 1b, 1c cut by cutting sawing.

Therefore, even optics low pass filter 1 produces collision and contacts when vibrating with impact in transportation, can prevent fully that also the peripheral sides with outstanding or burr from sustaining damage.Therefore, can not produce the fractionlet that brings of damage, and fractionlet can not adhere to the interarea of optics low pass filter, make that its optical characteristics is well kept.

And, when the interarea of optics low pass filter 1 by vacuum suction and be contained in conveying tray or the slit of packing box when inner, do not contact with other transmission equipment (automatic equipment) and can cause damage.Therefore, the cleaning of optics low pass filter 1 and packaging process can robotizations, therefore boost productivity.And the bonding agent 6 of bonding optical sheet 1a, 1b, 1c flows out around optical sheet 1a, 1b, 1c, and is coated to optical sheet 1a, 1b, 1c side and outside above and below.Therefore, the bonding and coating of optical sheet 1a, the 1b that shields, 1c is handled and can be carried out in a procedure.And, when many optical sheets are stacked together cut sawing burr on the side when cutting, not gentle irregular also flatten by adhesive-applying smooth.

In this example of the invention described above, scatter and adhesive-applying in the periphery and the side of the upper and lower interarea that centers on optical sheet.But,, also can be subjected to adequately protecting of bonding agent by four sides of for example automatic equipment finger piece contact and the crestal line at four angles aborning even only on lateral surface, scatter and adhesive-applying.And bonding agent 6 is appointed as the ultraviolet curing material.But, also can be thermosetting material.As selection, the side that strip shape material can be used to replace bonding agent to tie up optical sheet is to form diaphragm.

And optical device of the present invention is meant the optics low pass filter 1 of lamination.Yet this can be applied to such as the optical device that comprises the wave plate thin slice that contains the optics low pass filter, or the optical device except the laminated optical low pass filter.

And, they are bonded together form optics low pass filter (lamination) 1 then by three optical crystal chips being cut into single optical sheet 1a, 1b, 1c, also three optical crystal chips can be bonded together and cut them then and obtain lamination.In this case, by adhesive-applying on the lateral surface of optical sheet at least, can protect lamination at all injury-free.

And, cut and cut apart optical crystal chip with cutting saw, but similarly, at first can mark groove and cut apart then with scriber.Even in this situation, also burr can appear owing to scriber on lateral surface.And, except using bonding agent, bond them together then by the mirror polish optical sheet and can form lamination.

Claims (11)

1. optics low pass filter, wherein a plurality of optical sheets are bonding and laminated together by bonding agent, it is characterized in that:

Between the interarea of described a plurality of optical sheets, be coated with bonding agent; Push described a plurality of optical sheet from these two interareas, between two interareas, to overflow described bonding agent; Scatter and be coated with described bonding agent with side periphery at described optical sheet.

2. optics low pass filter as claimed in claim 1, wherein applying described bonding agent is the periphery that extends to interarea from the described exterior lateral sides of described optical sheet.

3. optics low pass filter as claimed in claim 1, wherein said optical sheet is a thin slice.

4. optics low pass filter as claimed in claim 3, wherein said thin slice are to form by the single optical crystal chip of repeated segmentation.

5. optics low pass filter as claimed in claim 1, wherein said optical sheet are that the lamination of multi-disc thin slice forms.

6. optics low pass filter as claimed in claim 5, wherein said lamination have with the coherent described thin slice interarea of bonding agent.

7. optics low pass filter as claimed in claim 5, wherein the laminated optical wafer by the coarctate multi-disc optical crystal chip of dividing layer forms described lamination.

8. the production method of an optics low pass filter, wherein the multi-disc optical sheet is bonding and laminated together with bonding agent, may further comprise the steps:

With optical crystal chip cutting and be divided into the multi-disc optical sheet;

Adhesive-applying between the interarea of described at least multi-disc optical sheet;

Push described multi-disc optical sheet from two interareas, between described two interareas, to overflow described bonding agent; With

Scatter and apply described bonding agent in described side periphery.

9. optics low pass filter production method as claimed in claim 8, wherein said bonding agent overflow to the periphery of two interareas from described side around optical sheet.

10. optics low pass filter production method as claimed in claim 8, wherein said bonding agent is the ultraviolet curing material.

11. optics low pass filter production method as claimed in claim 8, wherein said bonding agent is a thermosets.

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