JPH049802A - Light shield member for optical equipment - Google Patents
Light shield member for optical equipmentInfo
- Publication number
- JPH049802A JPH049802A JP11259590A JP11259590A JPH049802A JP H049802 A JPH049802 A JP H049802A JP 11259590 A JP11259590 A JP 11259590A JP 11259590 A JP11259590 A JP 11259590A JP H049802 A JPH049802 A JP H049802A
- Authority
- JP
- Japan
- Prior art keywords
- light shield
- film
- light
- base material
- lubricant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims description 11
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000000314 lubricant Substances 0.000 claims abstract description 19
- 239000006229 carbon black Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 7
- 239000000057 synthetic resin Substances 0.000 claims abstract description 7
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 5
- 229920006255 plastic film Polymers 0.000 abstract description 5
- 239000002985 plastic film Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000002932 luster Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 5
- 229920006267 polyester film Polymers 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- -1 acrylic polyol Chemical class 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 239000006224 matting agent Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Mechanical Light Control Or Optical Switches (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
し産業上の利用分野］
この発明は一般のカメラやビデオカメラなどの光学機器
のシャッター、絞り部材、絞り部材等の遮光部材に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application] The present invention relates to light shielding members such as shutters, diaphragm members, and diaphragm members for optical equipment such as general cameras and video cameras.
［従来の技術］
従来より、カメラ等光学機器の絞りとしては、金属フィ
ルムに黒色塗料を塗布したものが用いられてきたが、最
近では駆動が容易であることから軽量なプラスチックフ
ィルムが用いられるようになっている。このようなプラ
スチックフィルム素材の絞りとしては、黒色顔料を含有
するポリエステルフィルムに熱硬化型のつや消し塗料を
コーティングし、その上に帯電防止剤を付着したもの（
特開昭５７−１１８２２６号）、高濃度にカーボンブラ
ックを混入したプラスチックフィルムをサンドブラスト
によって粗面化し、その上に電子導電型の導電剤を塗布
したもの（特開平１−１２５０３号）等が知られている
。[Prior art] Traditionally, metal films coated with black paint have been used as apertures for optical devices such as cameras, but recently lightweight plastic films have been used because they are easier to drive. It has become. The aperture for such plastic film materials is made by coating a polyester film containing a black pigment with a thermosetting matte paint and adhering an antistatic agent on top of it.
JP-A No. 57-118226), a plastic film containing a high concentration of carbon black is roughened by sandblasting, and an electronically conductive type conductive agent is coated thereon (JP-A No. 1-12503). It is being
［発明が解決しようとする課題］
しかしながら、上記従来の素材のうち、前者はつや消し
剤の塗布と帯電防止剤の塗布と二重の塗布工程を必要と
し、しかも二重の皮膜になっているので基材のフィルム
との密着性が悪く、絞りとして使用している間にこれら
皮膜が脱落しやすいという難点がある。[Problems to be Solved by the Invention] However, among the above-mentioned conventional materials, the former requires a double coating process of applying a matting agent and an antistatic agent, and has a double film. The problem is that the adhesion to the base film is poor, and the coating tends to fall off while being used as a diaphragm.
又、つや消し塗料により滑り性が不十分で、絞り羽根等
に用いた場合、その駆動のために余計な電力を要し、カ
メラに内蔵される電池の消耗が速いという難点がある。Furthermore, the matte paint has insufficient slipperiness, and when used for aperture blades, etc., extra power is required to drive them, and the battery built into the camera is quickly consumed.
一方、後者はサンドブラストによって基材に微細凹凸を
形成しているため、マット形状が部材どうしの摺り合わ
せ時につぶれやすく、長期使用後、光沢がでてくるとい
う難点がある。又、前者同様、動摩擦が大きいため、絞
り駆動に電力を要するという難点がある。On the other hand, since the latter uses sandblasting to form fine irregularities on the base material, the matte shape tends to be crushed when the members are rubbed together, and the problem is that it becomes glossy after long-term use. Also, like the former, there is a drawback that electric power is required to drive the aperture due to large dynamic friction.
更に、これら従来の素材はいずれも基材であるポリエス
テルフィルム自体に絞りとして必要とされる遮光性をも
たせるため、基材中に混入限界までカーボンブラックを
混入せしめているため、基材フィルムの物性が変化する
、コストが高くなるなどの難点がある。Furthermore, in order to give the polyester film itself, which is the base material, the light-shielding properties required as an aperture, all of these conventional materials have carbon black mixed into the base material to the limit, which affects the physical properties of the base film. There are disadvantages such as changes in the amount of electricity and high costs.
［発明の目的］
本発明はこのような従来技術の難点を解決するためにな
されたもので、光学機器の遮光部材として充分な遮光性
と滑り性を有し、しかもプラスチックフィルムの特性（
軽量、低コスト）を維持した光学機器用遮光部材を提供
することを目的とする。[Object of the Invention] The present invention has been made to solve the problems of the prior art, and has sufficient light-shielding properties and slipperiness as a light-shielding member for optical equipment, and also has the characteristics of plastic films (
The purpose of the present invention is to provide a light shielding member for optical equipment that maintains light weight and low cost.
［課題を解決するための手段］
以上の目的を達成する本発明の光学機器用遮光部材は、
合成樹脂フィルムから成る基材と、前記基材の両面に形
成された遮光膜とから成り、前記遮光膜は熱硬化型樹脂
又は常温硬化型樹脂中にカーボンブラック及び滑剤を含
有するものである。[Means for Solving the Problems] The light shielding member for optical equipment of the present invention that achieves the above objects has the following features:
It consists of a base material made of a synthetic resin film and a light-shielding film formed on both sides of the base material, and the light-shielding film contains carbon black and a lubricant in a thermosetting resin or room temperature curing resin.
ここで、基材としてはポリエステルフィルム、ポリイミ
ドフィルム、ポリスチレンフィルム、ポリカーボネート
フィルム等の合成樹脂フィルムが用いられるが、特にポ
リエステルフィルムが好適である。但し、遮光部材とし
て使用する際に、部材端部の合成樹脂フィルム部分にお
いてレンズ等で集光された光が反射し悪影響を及ぼす場
合には、カーボンブラック等の黒色系顔料を含有させた
合成樹脂フィルムを使用することが望ましい。この場合
、黒色系顔料はフィルムが目で見て黒色に見える程度、
光学濃度３程度となるように含有されていればよい。フ
ィルムの厚さは、用途により異なるが一般カメラの遮光
部材の場合、５０μ〜１２５μとする。Here, as the base material, synthetic resin films such as polyester film, polyimide film, polystyrene film, polycarbonate film, etc. are used, and polyester film is particularly suitable. However, when used as a light-shielding member, if the synthetic resin film at the end of the member reflects the light collected by a lens, etc. and has an adverse effect, synthetic resin containing a black pigment such as carbon black may be used. It is desirable to use film. In this case, the black pigment is enough to make the film look black to the naked eye.
It is sufficient that the content is such that the optical density is about 3. The thickness of the film varies depending on the application, but in the case of a light shielding member for a general camera, it is 50 μm to 125 μm.
遮光膜を形成するベース樹脂としてはアルキド樹脂、フ
ェノール樹脂、不飽和ポリエステル樹脂等の熱硬化型樹
脂又はアクリルポリオールとイソシアネートから成る常
温硬化型樹脂で基材との密着性のよいものが用いられる
。As the base resin for forming the light-shielding film, a thermosetting resin such as an alkyd resin, a phenol resin, an unsaturated polyester resin, or a room temperature curing resin consisting of an acrylic polyol and an isocyanate, which has good adhesion to the base material, is used.
滑剤としては、有機系、無機系いずれのものも用いられ
、例えばポリエチレン、パラフィン、ワックス等の炭化
水素系滑剤、ステアリン酸等の脂肪族系滑剤、ステアリ
ン酸アミド等の脂肪酸アミド系滑剤、ステアリン酸ブチ
ル等のエステル系滑剤、アルコール系滑剤、金属石鹸、
滑石、二硫化モリブデン等の固体潤滑剤、シリコーン樹
脂粒子、フッ素樹脂粒子、架橋ポリメチルメタクリレー
ト粒子、架橋ポリスチレン粒子等が挙げられ、これら１
種又は２種以上を混合して用いることができる。Both organic and inorganic lubricants can be used, such as hydrocarbon lubricants such as polyethylene, paraffin, and wax, aliphatic lubricants such as stearic acid, fatty acid amide lubricants such as stearic acid amide, and stearic acid. Ester lubricants such as butyl, alcohol lubricants, metal soaps,
Examples include solid lubricants such as talcum and molybdenum disulfide, silicone resin particles, fluororesin particles, crosslinked polymethyl methacrylate particles, and crosslinked polystyrene particles.
A species or a mixture of two or more kinds can be used.
尚、固体滑剤の場合、粒系は１０μ〜数μ、好ましくは
３μ〜５μ程度のものが用いられる。In the case of a solid lubricant, particles of 10 to several microns, preferably about 3 to 5 microns, are used.
これら滑剤の含有量はベース樹脂に対し、５％〜５０％
程度とし、カーボンブラックと共に樹脂中に混練りする
。The content of these lubricants is 5% to 50% of the base resin.
and knead it into the resin together with carbon black.
尚、遮光膜は滑剤とカーボンブラックの他、つや消し剤
としてＳ＋０２等、導電剤としてＳｎＯ□等を含有して
いてもよい。In addition to the lubricant and carbon black, the light-shielding film may also contain S+02 as a matting agent and SnO□ as a conductive agent.
このように滑剤及びカーボンブラックを混合してなるベ
ース樹脂を基材フィルムの両面にコーティングすること
により、本発明の遮光部材を得ることができる。The light-shielding member of the present invention can be obtained by coating both surfaces of the base film with the base resin formed by mixing the lubricant and carbon black in this manner.
遮光膜の厚さは、遮光膜中に含有されるカーボンブラッ
クの量、用途によって異なるが一般カメラの絞りとして
用いる場合、４μ〜１５μ程度である。The thickness of the light-shielding film varies depending on the amount of carbon black contained in the light-shielding film and the application, but when used as an aperture of a general camera, it is approximately 4 μ to 15 μ.
［作用］
遮光膜に含有されるカーボンブラックは、遮光膜に遮光
性を付与すると共に、導電性を付与し、遮光部材の帯電
を防止する。又、滑材はマット材としてつや消し効果を
有すると共に、絞りとしての滑り性を与え、駆動が容易
で且つ摩耗による凹凸変化、つや変化がない。[Function] The carbon black contained in the light-shielding film imparts light-shielding properties to the light-shielding film, as well as electrical conductivity, thereby preventing the light-shielding member from being charged. In addition, the lubricant has a matte effect as a matte material, provides slipperiness as a diaphragm, is easy to drive, and does not change in unevenness or gloss due to wear.
基材両面に遮光膜を設けた三重構造とすることにより、
遮光部材は充分な遮光性を有し、しかも軽量で基材自体
の特性を損うことなく、低コストである。By creating a triple structure with light-shielding films on both sides of the base material,
The light shielding member has sufficient light shielding properties, is lightweight, does not impair the properties of the base material itself, and is low cost.
［実施例コ
基材トして厚さ５０μのカーボンブラ・ツクを混練した
ポリエステルフィルムを用い、このフィルムの両面に下
記処方の遮光膜用塗液を塗工し、厚さ１０μの遮光膜を
形成した。[Example: A polyester film kneaded with carbon black with a thickness of 50 μm was used as the base material, and a light-shielding film coating liquid with the following formulation was applied to both sides of the film to form a light-shielding film with a thickness of 10 μm. Formed.
アクリルポリオール（アクリディックＡ３０１−Ｐ。Acrylic polyol (Acrydic A301-P.
大日本インキ（株）製） ５０重量部イソシアネー
ト（タケネート、ＤＩＩＯＮ、式日薬品工業（株）製）
１２５重量部カーボンブラック（パルカンＸ
Ｃ−７２、キャボット社製） ２５
重量部滑剤（セリダスト、３６２０ （ヘキスト製）１
２．５重量部
この遮光部材は絞りとして実用可能な遮光性（マクベス
透過濃度計で上限）を示し、その表面抵抗値は１０４Ω
であり、絞り羽根の駆動時に静電気の影響を受けず、ス
ムーズに作動した。又、遮光部材として所定の形に打ち
抜く作業時にも良好な作業性を示した。Dainippon Ink Co., Ltd.) 50 parts by weight isocyanate (Takenate, DIION, Shikinichi Yakuhin Kogyo Co., Ltd.)
125 parts by weight carbon black (Palcan
C-72, manufactured by Cabot) 25
Part by weight Lubricant (Ceridust, 3620 (manufactured by Hoechst) 1
2.5 parts by weight This light-shielding member exhibits a practical light-shielding property (upper limit for Macbeth transmission densitometer) as a diaphragm, and its surface resistance value is 104Ω.
The aperture blades were not affected by static electricity and operated smoothly. It also showed good workability when punched into a predetermined shape as a light shielding member.
又、この遮光性部材により作成したカメラ用絞りの耐久
性を試験したところ、１００万回使用後でも表面のつや
の変化がなく、機械的強度も充分であることが確認され
た。Furthermore, when the durability of a camera diaphragm made from this light-shielding member was tested, it was confirmed that there was no change in surface gloss even after one million uses, and that the mechanical strength was sufficient.
［発明の効果］
以上の実施例からも明らかなように本発明の光学機器用
遮光部材によれば、基材の両面に遮光膜を設けた三重構
造であるので、カーボンブラックの使用を極力低減する
ことができ、基材である合成樹脂フィルムの物性を維持
したまま、低コスト化を図ることができる。[Effects of the Invention] As is clear from the above examples, the light shielding member for optical equipment of the present invention has a triple structure in which light shielding films are provided on both sides of the base material, so the use of carbon black is reduced as much as possible. This makes it possible to reduce costs while maintaining the physical properties of the synthetic resin film that is the base material.
又、遮光膜のカーボンブラック量、厚さ等を調整するこ
とにより、要求される遮光性の度合が異なる多種の光学
機器に対応できる遮光部材を得ることができる。Furthermore, by adjusting the amount of carbon black, thickness, etc. of the light-shielding film, it is possible to obtain a light-shielding member that can be used with various optical devices that require different degrees of light-shielding performance.
更に、本発明の光学機器用遮光部材によれば、遮光膜に
滑剤を含有させることにより、絞りとしての滑り性が極
めて良好で、駆動電力が少なく、又摩耗がなく耐久性の
ある遮光部材を得ることができる。Further, according to the light-shielding member for optical equipment of the present invention, by incorporating a lubricant into the light-shielding film, the light-shielding member has extremely good sliding properties as an aperture, requires less driving power, and is durable without wear. Obtainable.
Claims (1)
成された遮光膜とから成り、前記遮光膜は熱硬化型樹脂
又は常温硬化型樹脂中にカーボンブラック及び滑剤を含
有することを特徴とする光学機器用遮光部材。It consists of a base material made of a synthetic resin film and a light-shielding film formed on both sides of the base material, and the light-shielding film contains carbon black and a lubricant in a thermosetting resin or room temperature curing resin. Light shielding material for optical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11259590A JP2962769B2 (en) | 1990-04-27 | 1990-04-27 | Light shielding member for optical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11259590A JP2962769B2 (en) | 1990-04-27 | 1990-04-27 | Light shielding member for optical equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH049802A true JPH049802A (en) | 1992-01-14 |
| JP2962769B2 JP2962769B2 (en) | 1999-10-12 |
Family
ID=14590672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11259590A Expired - Lifetime JP2962769B2 (en) | 1990-04-27 | 1990-04-27 | Light shielding member for optical equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2962769B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6110595A (en) * | 1997-03-27 | 2000-08-29 | Somar Corporation | Anti-reflective film |
| JP2008251877A (en) * | 2007-03-30 | 2008-10-16 | Nippon Kodoshi Corp | Flexible printed circuit board |
| US7670673B2 (en) | 2006-11-30 | 2010-03-02 | Sumitomo Metal Mining Co., Ltd. | Heat-resistant, light-shielding film, production thereof, and aperture and light intensity adjusting device using the same |
| WO2010071073A1 (en) | 2008-12-16 | 2010-06-24 | 昭和電工株式会社 | Hardening composition and hardened product of same |
| US8757902B2 (en) | 2009-11-20 | 2014-06-24 | Toyobo Co., Ltd. | Black heat resistant light shading film and production method thereof, and, diaphragm, light intensity adjusting module and heat resistant light shading tape using the same |
| KR20180011078A (en) | 2015-05-21 | 2018-01-31 | 키모토 컴파니 리미티드 | Light-shielding member, black resin comoposition, and black resin molded product |
| KR20180011079A (en) | 2015-05-21 | 2018-01-31 | 키모토 컴파니 리미티드 | Light-shielding member, black resin comoposition, and black resin molded product |
| KR20190043622A (en) * | 2016-09-16 | 2019-04-26 | 소마 가부시기가이샤 | Shading member for optical device |
| US12424018B2 (en) | 2022-03-08 | 2025-09-23 | Samsung Display Co., Ltd. | Method of fabricating electronic device including a sensor module |
-
1990
- 1990-04-27 JP JP11259590A patent/JP2962769B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6110595A (en) * | 1997-03-27 | 2000-08-29 | Somar Corporation | Anti-reflective film |
| US7670673B2 (en) | 2006-11-30 | 2010-03-02 | Sumitomo Metal Mining Co., Ltd. | Heat-resistant, light-shielding film, production thereof, and aperture and light intensity adjusting device using the same |
| JP2008251877A (en) * | 2007-03-30 | 2008-10-16 | Nippon Kodoshi Corp | Flexible printed circuit board |
| WO2010071073A1 (en) | 2008-12-16 | 2010-06-24 | 昭和電工株式会社 | Hardening composition and hardened product of same |
| US8349934B2 (en) | 2008-12-16 | 2013-01-08 | Showa Denko K.K. | Hardening composition and hardened product thereof |
| US8757902B2 (en) | 2009-11-20 | 2014-06-24 | Toyobo Co., Ltd. | Black heat resistant light shading film and production method thereof, and, diaphragm, light intensity adjusting module and heat resistant light shading tape using the same |
| KR20180011078A (en) | 2015-05-21 | 2018-01-31 | 키모토 컴파니 리미티드 | Light-shielding member, black resin comoposition, and black resin molded product |
| KR20180011079A (en) | 2015-05-21 | 2018-01-31 | 키모토 컴파니 리미티드 | Light-shielding member, black resin comoposition, and black resin molded product |
| US10975253B2 (en) | 2015-05-21 | 2021-04-13 | Kimoto Co., Ltd. | Light-blocking member, black resin composition, and black resin molded article |
| KR20190043622A (en) * | 2016-09-16 | 2019-04-26 | 소마 가부시기가이샤 | Shading member for optical device |
| US12424018B2 (en) | 2022-03-08 | 2025-09-23 | Samsung Display Co., Ltd. | Method of fabricating electronic device including a sensor module |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2962769B2 (en) | 1999-10-12 |
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