JP2006317631A - Optical component fixing sheet - Google Patents

Optical component fixing sheet Download PDF

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JP2006317631A
JP2006317631A JP2005138891A JP2005138891A JP2006317631A JP 2006317631 A JP2006317631 A JP 2006317631A JP 2005138891 A JP2005138891 A JP 2005138891A JP 2005138891 A JP2005138891 A JP 2005138891A JP 2006317631 A JP2006317631 A JP 2006317631A
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filter
opening
fixing sheet
optical component
holding frame
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Japanese (ja)
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Osamu Kobayashi
理 小林
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Fujinon Corp
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Fujinon Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical component fixing sheet which can simply fix an optical component to a holding member and easily disassemble the optical component from the holding member, without requiring a jig and a tool. <P>SOLUTION: The fixing sheet 10 is composed of a sheet main body 10a and an adhesive layer 10b and an opening 12 which allows a luminous flux to pass through is formed in the nearly central part of the fixing sheet 10. Then, the fixing sheet 10 is bonded so as to extend over both a filter 6 incorporated in a holding frame 5 and the holding frame 5, so that the filter 6 is fixed in the holding frame 5. An extension opening 12a is formed to be consecutive to the opening 12 and a part of the incident plane of the filter 6 and the front surface of the holding frame 5 is exposed. When the incident plane of the filter 6 is wiped through the opening 12, foreign matter 20 can be transferred to the holding frame 5 from the incident plane of the filter 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、光学フィルタなどの光学部品を固定する際に用いられる光学部品固定シートに関するものである。   The present invention relates to an optical component fixing sheet used when fixing an optical component such as an optical filter.

一般に、光学フィルタやレンズなどの光学部品をフィルタ枠やレンズ枠などの保持部材に固定、保持させる場合、押さえ環を用いて固定したり、押さえ板で押さえたり、爪状部材にはめ込んで固定したり、カシメで固定したりすることが行われている。また、光学部品の外周と保持部材との間に接着剤を入れて固定する方法なども行われてきた。特許文献1ではレーザを用いたカシメ方法が、特許文献2では接着剤を使用した手段が、特許文献3ではカシメや押さえ環を用いた手段が開示されている。
特開2004−233639号公報 特開2001−290063号公報 特公平4−73842号公報
In general, when optical parts such as optical filters and lenses are fixed and held on a holding member such as a filter frame or lens frame, they are fixed using a holding ring, pressed by a holding plate, or fitted into a nail-like member. Or fixing with caulking. In addition, a method of inserting an adhesive between the outer periphery of the optical component and the holding member and fixing it has been performed. Patent Document 1 discloses a caulking method using a laser, Patent Document 2 discloses a means using an adhesive, and Patent Document 3 discloses a means using a caulking or a retaining ring.
Japanese Patent Laid-Open No. 2004-233639 JP 2001-290063 A Japanese Patent Publication No. 4-73842

押さえ環を使用する場合は、光学部品が組み込まれる保持部材の内面にネジをきるなどの加工が必要であり、押さえ環は部品としても高価である。押さえ板を使用する場合は2個以上の加工が必要となり、また固定するネジ頭分のスペースが必要になる。カシメの場合は、カシメ工具が必要となり、またあとで分解することや再組み立てすることが困難になる場合が多い。接着剤を用いて光学部品を保持部材に固定させる場合においては、接着剤が硬化するための時間が必要になり、分解や清掃や再組み立てにも多くの時間がかかるなどの問題がある。   When the presser ring is used, it is necessary to process a screw on the inner surface of the holding member into which the optical component is incorporated, and the presser ring is expensive as a part. When using a pressing plate, two or more processes are required, and a space for a screw head to be fixed is required. In the case of caulking, caulking tools are required, and it is often difficult to disassemble and reassemble later. When the optical component is fixed to the holding member using an adhesive, it takes time for the adhesive to harden, and there is a problem that much time is required for disassembly, cleaning, and reassembly.

本発明は上記事情を考慮してなされたもので、光束を透過または反射する光学部品の光学面を露出させる開口を有し、裏面に設けられた粘着剤層により前記光学面と保持部材との双方に跨がるように貼り付けられる光学部品固定シートを提供する。また、本発明の好ましい実施形態によれば、前記開口には、光学部品の外縁に接する保持部材の一部を部分的に露出させるように拡張された延長開口が連ねられる。   The present invention has been made in view of the above circumstances, and has an opening for exposing an optical surface of an optical component that transmits or reflects a light beam, and an adhesive layer provided on the back surface between the optical surface and the holding member. Provided is an optical component fixing sheet that is attached so as to straddle both sides. According to a preferred embodiment of the present invention, the opening is connected to an extended opening extended so as to partially expose a part of the holding member in contact with the outer edge of the optical component.

本発明の光学部品固定シートを用いれば、保持部材に特別な加工を要せずに短時間で簡便に光学部品を保持部材に固定することができ、部品コストや組み立てコストを節約するうえで効果的で、また分解を行うにあたっても光学部品や保持部材を何ら損傷することなく効率的に作業を行うことができる。さらに前記延長開口を設けておくことによって、光学部品を保持部材に固定した後で溶剤などのクリーニング液で光学面を払拭する際に、光学面に接する保持部材上で拭き止めすることができるから、払拭で集められた汚れや不溶物、あるいはクリーニング液の蒸発跡を光学部品上に残さずに済むようになる。   If the optical component fixing sheet of the present invention is used, the optical component can be easily fixed to the holding member in a short time without requiring any special processing on the holding member, which is effective in saving the component cost and assembly cost. In addition, when disassembling, the work can be performed efficiently without damaging the optical component or the holding member. Further, by providing the extension opening, when the optical surface is wiped with a cleaning liquid such as a solvent after the optical component is fixed to the holding member, it can be wiped on the holding member in contact with the optical surface. Thus, dirt and insoluble matter collected by wiping or evaporation traces of the cleaning liquid need not be left on the optical component.

図1に本発明を用いた固定シートの外観を示す。この固定シート2はシート本体2aの裏面に粘着剤層2bを設けたもので、その中央部に光束を通過させるために円形の開口3が形成されている。シート本体2aは、破断しにくく、適度な柔軟性をもった紙、合成紙あるいはプラスチック製のシート材で構成され、例えば表面に黒色塗装を施した厚み0.2mm程度の合成紙などを効果的に用いることができる。この固定シート2は、例えば図2に示すように、上面が平坦な保持枠5に円形平板状のフィルタ6を組み込んだ後、これを固定するときに用いられる。     FIG. 1 shows the appearance of a fixed sheet using the present invention. This fixed sheet 2 is provided with a pressure-sensitive adhesive layer 2b on the back surface of the sheet body 2a, and a circular opening 3 is formed in the center of the fixed sheet 2 so as to allow the light beam to pass therethrough. The sheet body 2a is made of paper, synthetic paper or plastic sheet material that is not easily broken and has appropriate flexibility. For example, a synthetic paper having a thickness of about 0.2 mm with a black coating on the surface is effective. Can be used. For example, as shown in FIG. 2, the fixing sheet 2 is used when a circular flat filter 6 is incorporated in a holding frame 5 having a flat upper surface and then fixed.

図2(B)に示すように、保持枠5には上方から入射する光束を通過させる貫通穴5aが形成され、この貫通穴5aの内壁にはフィルタ6の下面を支持する段差部5bが設けられている。このような保持枠5はプラスチックの一体成形で用意につくることができる。また、保持枠5の上方からにフィルタ6を落とし込んだときに、フィルタ6の上面が保持枠5の上面よりも低くならないように、前記段差部5bの位置は予め決められている。   As shown in FIG. 2 (B), the holding frame 5 is formed with a through hole 5a for allowing a light beam incident from above to pass therethrough, and a step portion 5b for supporting the lower surface of the filter 6 is provided on the inner wall of the through hole 5a. It has been. Such a holding frame 5 can be easily prepared by integral molding of plastic. Further, the position of the step portion 5 b is determined in advance so that the upper surface of the filter 6 does not become lower than the upper surface of the holding frame 5 when the filter 6 is dropped from above the holding frame 5.

フィルタ6を保持枠5に落とし込んだ後、フィルタ6の中心と開口3の中心とがほぼ一致するように固定シート2が貼り付けられる。図2(A)にフィルタ6の外周縁を破線で示したことからも判るように、開口3の内径はフィルタ6の外径よりも小さくしてあるから、固定シート2はフィルタ6の外周部分と保持枠5の上面に跨がって貼り付けられるようになり、フィルタ6を保持枠5に固定することができる。なお、フィルタ6の上面が保持枠5の上面から多少突出したとしても、固定シート2は適度な柔軟性をもっているので支障はない。   After dropping the filter 6 into the holding frame 5, the fixing sheet 2 is pasted so that the center of the filter 6 and the center of the opening 3 substantially coincide. As can be seen from the fact that the outer peripheral edge of the filter 6 is indicated by a broken line in FIG. 2A, the inner diameter of the opening 3 is smaller than the outer diameter of the filter 6. And the filter 6 can be fixed to the holding frame 5. Even if the upper surface of the filter 6 slightly protrudes from the upper surface of the holding frame 5, there is no problem because the fixing sheet 2 has appropriate flexibility.

また、固定シート2はフィルタ6の周辺だけでなく、図2(A)に示すように保持枠5上面の広い範囲に貼り付けられるので、充分な貼り付け強度が得られる。さらに、固定シート2は光学面として研磨されたフィルタ6の上面に貼り付けられるため、貼り付け時の密着性も高く充分な固定強度が得られる。なお、開口3の内径を小さくして固定シートとフィルタ6との貼り付け面積を広げれば固定強度をより高めることができるので、開口3の内径はフィルタ6に入射してくる光束の太さを考慮してこれを遮らないような径にしておけばよく、場合によっては固定シート6を黒色にして絞りの作用を持たせることも可能である。   In addition, since the fixed sheet 2 is attached not only to the periphery of the filter 6 but also to a wide range on the upper surface of the holding frame 5 as shown in FIG. 2A, sufficient attachment strength can be obtained. Further, since the fixing sheet 2 is affixed to the upper surface of the polished filter 6 as an optical surface, the adhesion at the time of affixing is high and sufficient fixing strength is obtained. The fixing strength can be further increased by reducing the inner diameter of the opening 3 to increase the bonding area between the fixing sheet and the filter 6, so that the inner diameter of the opening 3 is the thickness of the light beam incident on the filter 6. In consideration of this, the diameter may be set so as not to be blocked. In some cases, the fixed sheet 6 may be black to have a diaphragm function.

この固定シート2は上述したフィルタ6以外にも、レンズやミラーなど他の光学部品をそれぞれの保持部材に固定するときにも簡便に用いることができる。また、固定シート2を光学部品と保持部材に跨がって貼り付ける際には、光束の入射面に限らず、出射面に貼り付けることももちろん可能である。さらに、メンテナンスなどで分解が必要となった場合には固定シート2を剥がすだけでよく、治具や工具類を必要としない。   In addition to the filter 6 described above, the fixing sheet 2 can be easily used when fixing other optical components such as lenses and mirrors to the respective holding members. In addition, when the fixing sheet 2 is applied across the optical component and the holding member, it is of course possible to apply the fixing sheet 2 to the exit surface as well as the light incident surface. Furthermore, when disassembly is necessary for maintenance or the like, it is only necessary to peel off the fixing sheet 2, and jigs and tools are not required.

ところで、上記のようにフィルタ6を保持枠5に固定した後、あるいはメンテナンスの際に、フィルタ6の入射面(上面)を清浄にするために溶剤などのクリーニング液を染み込ませたレンズペーパーなどを用いて払拭する作業が必要となることも少なくない。こうした場合、先に述べた実施形態では、開口3を通してこの払拭作業を行ったときに、拭き止めた部分にクリーニング液が残りやすい。すると、クリーニング液が揮発したあとに汚れや不溶物が揮発せずにフィルタ6の入射面に残留してしまい、光学性能などを劣化させてしまうことが懸念される。   By the way, after fixing the filter 6 to the holding frame 5 as described above or during maintenance, a lens paper or the like soaked with a cleaning liquid such as a solvent to clean the incident surface (upper surface) of the filter 6 is used. In many cases, it is necessary to use and wipe it. In such a case, in the embodiment described above, when this wiping operation is performed through the opening 3, the cleaning liquid tends to remain in the wiped portion. Then, after the cleaning liquid is volatilized, there is a concern that dirt and insoluble matters do not volatilize and remain on the incident surface of the filter 6 to deteriorate optical performance and the like.

図3は、このような払拭作業を行ったときでも、フィルタ6の入射面に残留物を残さずに済むように工夫した固定シートの一例を示している。この固定シート10は、開口12の形状を変えただけで、シート本体10a,粘着剤層10bなどの他の構成は先の実施形態と同様でよい。開口12は、先の実施形態における開口3の一部を山形に拡張した延長開口12aを含み、この延長開口12aから保持枠5の一部が露出するようにしてある。   FIG. 3 shows an example of a fixing sheet that is devised so that no residue remains on the incident surface of the filter 6 even when such a wiping operation is performed. The fixing sheet 10 is the same as that of the previous embodiment except that the shape of the opening 12 is changed, and the other components such as the sheet main body 10a and the pressure-sensitive adhesive layer 10b. The opening 12 includes an extension opening 12a obtained by expanding a part of the opening 3 in the previous embodiment into a mountain shape, and a part of the holding frame 5 is exposed from the extension opening 12a.

この固定シート10を用いて保持枠5にフィルタ6を固定すると、図4に示すように、延長開口12aを通して保持枠5が部分的に露出する。フィルタ6が落とし込まれる貫通穴5aの内径は、光軸に直交する面内でフィルタ6を位置決めできるようにフィルタ6の外径に応じて決められているから、フィルタ6の外縁と貫通穴5aの開口縁との間には大きな隙間がなく、延長開口12aから露出する保持枠5の一部はフィルタ6の入射面とほぼ連なっているのが通常である。したがって開口12aを通して払拭作業を行うときには、まずフィルタ6の入射面を払いてそのままフィルタ6の外縁を越えて保持枠5の上で拭き止めるようにすればよい。そうすれば、クリーニング液が揮発したあとでも、汚れや不純物などの異物20は延長開口12aの部分から露出した保持枠5の上に残留するだけとなり、フィルタ6の入射面には残留しないので光学特性を劣化させることはない。   When the filter 6 is fixed to the holding frame 5 using the fixing sheet 10, the holding frame 5 is partially exposed through the extension opening 12a as shown in FIG. The inner diameter of the through hole 5a into which the filter 6 is dropped is determined according to the outer diameter of the filter 6 so that the filter 6 can be positioned in a plane orthogonal to the optical axis. In general, there is no large gap between the opening edge and the part of the holding frame 5 exposed from the extended opening 12 a is substantially continuous with the incident surface of the filter 6. Therefore, when performing the wiping operation through the opening 12a, first, the incident surface of the filter 6 may be wiped off and directly wiped over the holding frame 5 beyond the outer edge of the filter 6. Then, even after the cleaning liquid is volatilized, the foreign matter 20 such as dirt and impurities remains only on the holding frame 5 exposed from the portion of the extension opening 12a, and does not remain on the incident surface of the filter 6, so that it is optical. The characteristics are not deteriorated.

なお、延長開口12aから露出する保持枠5の一部がフィルタ6の入射面と同じ高さあるいは低くなっていれば、払拭作業を行うときに異物20をフィルタ6の入射面から支障なく取り除くことができる。したがって、保持枠5の上面がフィルタ6の入射面より高くなることは好ましくなく、一枚の固定シート10でフィルタ6を保持枠5に充分な強度で固定するうえでも避けるべきである。   If a part of the holding frame 5 exposed from the extension opening 12a is the same height or lower than the incident surface of the filter 6, the foreign matter 20 can be removed from the incident surface of the filter 6 without any trouble when performing the wiping operation. Can do. Therefore, it is not preferable that the upper surface of the holding frame 5 be higher than the incident surface of the filter 6, and should be avoided even when the filter 6 is fixed to the holding frame 5 with sufficient strength by the single fixing sheet 10.

固定シート10は、適度な柔軟性を有するシート本体10aと粘着剤層10bとで構成されているため、フィルタ6のような平板状のものだけでなく、曲面をもった光学部品の固定にも用いることができる。例えば図5に示すように、入射面が凸球面となったレンズ22を保持枠24に固定する場合には、保持枠24の貫通穴の内壁に形成された段差部24a上にレンズ22を落とし込み、その上から同様にして固定シート10を貼り付ければよい。図6に示すように、固定シート10はレンズ22の凸球面に倣うように変形し、レンズ22の外周部分には粘着剤層10bが密着し、また固定シート10は広い範囲で保持枠24の上面に貼り付けられるから、充分な強度でレンズ22を保持枠24に一体化させることができる。   Since the fixing sheet 10 is composed of a sheet body 10a and an adhesive layer 10b having appropriate flexibility, not only a flat plate like the filter 6 but also an optical component having a curved surface is fixed. Can be used. For example, as shown in FIG. 5, when fixing the lens 22 having a convex spherical entrance surface to the holding frame 24, the lens 22 is dropped onto the stepped portion 24 a formed on the inner wall of the through hole of the holding frame 24. The fixing sheet 10 may be attached in the same manner from above. As shown in FIG. 6, the fixing sheet 10 is deformed so as to follow the convex spherical surface of the lens 22, the adhesive layer 10 b is in close contact with the outer peripheral portion of the lens 22, and the fixing sheet 10 has a wide range of the holding frame 24. Since it is affixed to the upper surface, the lens 22 can be integrated with the holding frame 24 with sufficient strength.

光学部品の外形形状が矩形である場合には、図7(A)に示すように開口25を矩形にした固定シート26を用いればよい。先の実施形態と同様に、開口25のサイズは、破線で示す光学部品の外形サイズ27よりも小さくすることが必要である。なお、符号25aは払拭作業を行うときに光学部品上に異物を残さないようにするための延長開口を示す。また、図7(B)に示す固定シート30は、円形の光学部品31に対して正方形の開口32を明けた例を示し、開口32の四隅を複数箇所に設けられた延長開口32aとして利用することができる。   When the outer shape of the optical component is rectangular, a fixed sheet 26 having a rectangular opening 25 may be used as shown in FIG. Similar to the previous embodiment, the size of the opening 25 needs to be smaller than the outer size 27 of the optical component indicated by a broken line. Reference numeral 25a denotes an extension opening for preventing foreign matter from remaining on the optical component when performing the wiping operation. 7B shows an example in which a square opening 32 is opened with respect to a circular optical component 31, and the four corners of the opening 32 are used as extension openings 32a provided at a plurality of locations. be able to.

本発明を用いた固定シートの外観図である。It is an external view of a fixed sheet using the present invention. 図1の固定シートでフィルタを固定した状態を示す平面図及び概略断面図である。It is the top view and schematic sectional drawing which show the state which fixed the filter with the fixing sheet of FIG. 固定シートの他の例を示す外観図である。It is an external view which shows the other example of a fixing sheet. 図3の固定シートでフィルタを固定した状態を示す外観斜視図及び概略断面図である。It is the external appearance perspective view and schematic sectional drawing which show the state which fixed the filter with the fixing sheet of FIG. レンズ及びその保持枠を示す外観斜視図である。It is an external appearance perspective view which shows a lens and its holding frame. 図3の固定シートで図5に示すレンズを保持枠に固定した状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which fixed the lens shown in FIG. 5 to the holding frame with the fixing sheet of FIG. 本発明を用いた固定シートの別の二例を示す概略図である。It is the schematic which shows another two examples of the fixing sheet using this invention.

符号の説明Explanation of symbols

2,10,26,30 固定シート
3,12,25,32 開口
5,24 保持枠
6 フィルタ
12a,25a,32a 延長開口
22 レンズ
2,10,26,30 Fixed sheet 3,12,25,32 Opening 5,24 Holding frame 6 Filter 12a, 25a, 32a Extension opening 22 Lens

Claims (2)

光学部品を保持部材に固定する光学部品固定シートにおいて、
光束を透過または反射する前記光学部品の光学面を露出させる開口を有し、裏面に設けられた粘着剤層により前記光学面と前記保持部材との双方に跨がって貼り付けられることを特徴とする光学部品固定シート。
In the optical component fixing sheet for fixing the optical component to the holding member,
It has an opening for exposing the optical surface of the optical component that transmits or reflects a light beam, and is pasted over both the optical surface and the holding member by an adhesive layer provided on the back surface. Optical component fixing sheet.
前記開口は、前記光学面の外縁に接する前記保持部材の一部を部分的に露出させるように拡張された延長開口を含むことを特徴とする請求項1記載の光学部品固定シート。
The optical part fixing sheet according to claim 1, wherein the opening includes an extended opening that is extended so as to partially expose a part of the holding member that contacts an outer edge of the optical surface.
JP2005138891A 2005-05-11 2005-05-11 Optical component fixing sheet Pending JP2006317631A (en)

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JP2001298640A (en) * 2000-04-17 2001-10-26 Canon Inc Digital camera
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