JP2962769B2 - Light shielding member for optical equipment - Google Patents
Light shielding member for optical equipmentInfo
- Publication number
- JP2962769B2 JP2962769B2 JP11259590A JP11259590A JP2962769B2 JP 2962769 B2 JP2962769 B2 JP 2962769B2 JP 11259590 A JP11259590 A JP 11259590A JP 11259590 A JP11259590 A JP 11259590A JP 2962769 B2 JP2962769 B2 JP 2962769B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- film
- shielding
- shielding member
- carbon black
- 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.)
- Expired - Lifetime
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Description
【発明の詳細な説明】 ［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。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light shielding member such as a shutter, an aperture member, and an aperture member of an optical device such as a general camera or a video camera.
［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
フイ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] Conventionally, as a diaphragm of an optical device such as a camera, a film obtained by applying a black paint on a metal film has been used.
Recently, a lightweight plastic film has been used because of easy driving. As the aperture of such a plastic film material, a polyester film containing a black pigment is coated with a thermosetting matting paint and an antistatic agent is adhered thereon (JP-A-57-118226). There is known a plastic film in which carbon black is mixed in a concentration, which is roughened by sandblasting, and a conductive agent of an electronic conductivity type is applied thereon (Japanese Patent Laid-Open No. 1-12503).
［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度の塗布工程を必要
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, of the above-mentioned conventional materials, the former requires the application of a matting agent and the application of an antistatic agent twice, which is a double coating. There is a problem that the adhesion to the substrate film is poor, and these films are liable to fall off during use 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。In addition, when the matte paint has insufficient lubricity and is used for diaphragm blades, extra power is required to drive it,
There is a drawback that 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 has fine irregularities formed on the substrate by sandblasting, there is a problem that the mat shape is easily crushed when the members are rubbed with each other, and the gloss is increased after long-term use. Also, like the former, because the dynamic friction is large,
There is a drawback that power is required for driving the aperture.
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。In addition, all of these conventional materials use the polyester film itself, which is the base material, to have the light-shielding properties required as a diaphragm, and carbon black is mixed into the base material to the limit of mixing, so the physical properties of the base film However, there are difficulties such as changes in cost and an increase in cost.
［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 in order to solve the above-mentioned drawbacks of the prior art, and has sufficient light-shielding properties and slipperiness as a light-shielding member of an optical device, and has the characteristics (light weight, It is an object of the present invention to provide a light-shielding member for an optical device while maintaining 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] A light-shielding member for an optical device of the present invention that achieves the above objects comprises a base made of a synthetic resin film, and light-shielding films formed on both surfaces of the base, The light shielding film contains carbon black and a lubricant in a thermosetting resin or a room temperature setting 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 substrate, a synthetic resin film such as a polyester film, a polyimide film, a polystyrene film, and a polycarbonate film is used, and a polyester film is particularly preferable. However, when light condensed by a lens or the like is reflected and adversely affects the synthetic resin film portion at the end of the member when used as a light shielding member, a synthetic resin containing a black pigment such as carbon black is used. It is desirable to use a film. In this case, it is sufficient that the black pigment is contained so that the film looks black visually and the optical density is about 3. The thickness of the film varies depending on the application, but is 50 μm to 125 μm for a light shielding member of a general camera.
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。Alkyd resin as the base resin for forming the light shielding film,
A thermosetting resin such as a phenol resin and an unsaturated polyester resin, or a room temperature curable resin composed of an acrylic polyol and an isocyanate, which has good adhesion to a substrate 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族アミド系滑剤、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。As the lubricant, any of organic and inorganic lubricants can be used. For example, hydrocarbon lubricants such as polyethylene, paraffin and wax, aliphatic lubricants such as stearic acid, aliphatic amide lubricants such as stearamide, stearin Ester lubricants such as butyl acid, alcohol lubricants, solid lubricants such as metal soap, talc, molybdenum disulfide, silicone resin particles, fluororesin particles, cross-linked polymethyl methacrylate particles, cross-linked polystyrene particles, and the like. Species or a mixture of two or more 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, those having a particle size of about 10 μm to several μm, preferably about 3 μm to 5 μm 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% based on the base resin.
And knead it into the resin 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SiO2等、導電剤としてSnO2等を含有していても
よい。The light-shielding film may contain, in addition to the lubricant and the carbon black, a matting agent such as SiO 2 and a conductive agent such as SnO 2 .
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 obtained by mixing the lubricant and the carbon black.
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 purpose of use, but is about 4 to 15 μm when used as a diaphragm for a general camera.
［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 and also imparts conductivity to prevent charging of the light-shielding member. Further, the lubricating material has a matting effect as a mat material, provides a slipperiness as a diaphragm, is easy to drive, and has no unevenness or gloss change due to abrasion.
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 adopting a triple structure in which a light-shielding film is provided on both surfaces of the base material, the light-shielding member has sufficient light-shielding properties, is lightweight, and has low cost without impairing the characteristics of the base material itself.
［実施例］ 基材として厚さ50μのカーボンブラックを混練したポ
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 having a thickness of 50 µm was used as a substrate, and a coating solution for a light-shielding film having the following formulation was applied to both surfaces of the film to form a light-shielding film having a thickness of 10 µm.
アクリルポリオール（アクリディックA801−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、D110N、武田薬品工業
（株）製） 12.5重量部 カーボンブラック（バルカンXC−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） 12.5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。Acrylic polyol (Acrydic A801-P, manufactured by Dainippon Ink Co., Ltd.) 50 parts by weight Isocyanate (Takenate, D110N, manufactured by Takeda Pharmaceutical Co., Ltd.) 12.5 parts by weight Carbon black (Vulcan XC-72, manufactured by Cabot Corporation) 25 12.5 parts by weight Lubricant (Seridust, 3620 (Hoechst)) 12.5 parts by weight This light-shielding member has a light-shielding property (upper limit with a Macbeth transmission densitometer) that can be used as a diaphragm, and its surface resistance value is 10 4 Ω
The operation was smooth without being affected by static electricity when the aperture blades were driven. Also, good workability was exhibited during the work of punching out 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。In addition, when the durability of the camera diaphragm made of this light-shielding member was tested, it was confirmed that there was no change in the gloss of the surface even after use for one million times, and 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 embodiments, the light-shielding member for an optical device of the present invention has a triple structure in which light-shielding films are provided on both surfaces of a substrate, so that the use of carbon black is reduced as much as possible. The cost can be reduced while maintaining the physical properties of the synthetic resin film as 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。Further, by adjusting the amount of carbon black and the thickness of the light-shielding film, a light-shielding member that can be used for various kinds of optical devices having different degrees of required light-shielding properties can be obtained.
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 an optical device of the present invention, by including a lubricant in the light-shielding film, the sliding property as an aperture is extremely good, the driving power is small, and the durable light-shielding member has no wear. Obtainable.
Claims (1)
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ことを特徴とする光学機器用遮光部
材。1. A light-shielding film comprising a base made of a synthetic resin film and light-shielding films formed on both surfaces of the base, wherein the light-shielding film contains carbon black and a lubricant in a thermosetting resin or a room temperature-setting resin. A light-shielding member for an optical device.
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 JPH049802A (en) | 1992-01-14 |
| JP2962769B2 true 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3719811B2 (en) * | 1997-03-27 | 2005-11-24 | ソマール株式会社 | Antireflection film |
| JP5114995B2 (en) | 2006-11-30 | 2013-01-09 | 住友金属鉱山株式会社 | Heat-resistant light-shielding film, method for producing the same, and diaphragm or light amount adjusting device using the same |
| JP5026133B2 (en) * | 2007-03-30 | 2012-09-12 | ニッポン高度紙工業株式会社 | Flexible printed circuit board |
| JP5689320B2 (en) | 2008-12-16 | 2015-03-25 | 昭和電工株式会社 | Curable composition and cured product thereof |
| JP5614218B2 (en) | 2009-11-20 | 2014-10-29 | 東洋紡株式会社 | Black heat-resistant light-shielding film and method for producing the same, aperture using the same, light quantity adjustment module, and heat-resistant light-shielding tape |
| JP6650686B2 (en) | 2015-05-21 | 2020-02-19 | 株式会社きもと | Light shielding member |
| JP6730006B2 (en) | 2015-05-21 | 2020-07-29 | 株式会社きもと | Optical shading member and manufacturing method thereof |
| CN109791229B (en) * | 2016-09-16 | 2020-07-28 | 索马龙株式会社 | Light shielding member for optical device |
-
1990
- 1990-04-27 JP JP11259590A patent/JP2962769B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH049802A (en) | 1992-01-14 |
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