JP2011215239A - Light-shielding body and imaging apparatus - Google Patents

Light-shielding body and imaging apparatus Download PDF

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JP2011215239A
JP2011215239A JP2010081382A JP2010081382A JP2011215239A JP 2011215239 A JP2011215239 A JP 2011215239A JP 2010081382 A JP2010081382 A JP 2010081382A JP 2010081382 A JP2010081382 A JP 2010081382A JP 2011215239 A JP2011215239 A JP 2011215239A
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light
layer
shielding
shielding body
black
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JP5411043B2 (en
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Koji Watanabe
耕二 渡邊
Hodaka Egawa
穂高 江川
Yasuyuki Kanematsu
保行 兼松
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Tsuryo Technica Corp
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Abstract

PROBLEM TO BE SOLVED: To solve the following problem: the light-shielding properties of the surface of a black layer formed on the surface of the conventional light-shielding body are changed since the surface of the black layer is damaged when it is touched and rubbed by the hand of a worker, a work tool, etc.SOLUTION: In the light-shielding body 3, its light-shielding degree is highly and stably maintained by solving the problem of the damage of the surface. The light-shielding body 3 includes a light-shielding layer 32 composed of a black metal compound and a translucent glass layer 33 protecting the black color of the surface of the light-shielding layer on a substrate in order. An imaging apparatus includes the light-shielding body inserted between lenses, in such a state that each peripheral edge of a lens group including at least two lenses is held by a holding device.

Description

本発明は、遮光体およびそれを用いた撮像装置に関するものであり、特に低価格のカメラなどの撮像装置におけるレンズ間に使用される遮光体およびに撮像装置に関するものである。   The present invention relates to a light shield and an imaging device using the same, and more particularly to a light shield used between lenses in an imaging device such as a low-cost camera and an imaging device.

例えば、複数のレンズ間に遮光体を挟んで使用されるレンズユニットにおいて、そこに使用される遮光体の表面は、レンズの先で結像する画質への悪影響を避けるために、その表面は光の反射を防止し、光を吸収する効果のある表面に改質する必要がある。また当該遮光体は、光学機構の設計上で必要となる寸法精度に対して、それを満足する最適な加工法にて製作されることが望ましく、また組み込み工程を含めて安定した形状が維持できるものである必要から、遮光体形成用の材料としてステンレスまたは銅合金を使用し、そのステンレスまたは銅合金をエッチング加工またはプレス加工することにより製作している。しかしこの場合、ステンレスの表面が剥き出しのままで使用したのでは、その表面で光を反射して結像する画像に悪影響を与えるので、当該表面を反射しないように改質する必要があって、そのために、例えばステンレスを電解することにより発色させたり、銅を酸化剤により酸化処理したりすることにより表面を黒色に改質して光の反射を防止し使用している。   For example, in a lens unit that is used with a light-shielding body sandwiched between a plurality of lenses, the surface of the light-shielding body used there is light to avoid adverse effects on the image quality formed at the tip of the lens. Therefore, it is necessary to modify the surface so as to prevent light reflection and absorb light. In addition, it is desirable that the light shielding body is manufactured by an optimum processing method that satisfies the dimensional accuracy required in the design of the optical mechanism, and a stable shape can be maintained including the assembling process. Since it is necessary to be made, stainless steel or a copper alloy is used as a material for forming a light shielding body, and the stainless steel or copper alloy is manufactured by etching or pressing. However, in this case, if the surface of the stainless steel is used as it is exposed, it will adversely affect the image formed by reflecting light on the surface, so it is necessary to modify the surface so that it does not reflect, For this purpose, for example, color is developed by electrolysis of stainless steel, or copper is oxidized with an oxidizing agent to modify the surface to black, thereby preventing light reflection.

特許公開２００９−１３９７０５号公報Japanese Patent Publication No. 2009-139705 特許公開２００４−３４１１９４号公報Japanese Patent Publication No. 2004-341194 特許公開２００６−１８９７２６号公報Japanese Patent Publication No. 2006-189726 特許公開平９− ３１６６２号公報Japanese Patent Publication No. 9-31662 特許公開平６−２９９３９４号公報Japanese Patent Publication No. Hei 6-299394

ところで、従来の遮光体の表面に形成された上記黒色層の表面は、作業員の手や作業工具などと接触して擦られると傷付き、遮光性に変化が生じる問題がある。   By the way, the surface of the black layer formed on the surface of the conventional light-shielding body has a problem that it is scratched and changes in the light-shielding property when it is rubbed in contact with an operator's hand or work tool.

本発明の遮光体は、上記した表面損傷の問題を解消して、その遮光度を高度にかつ安定に維持するものであって、基体、上記基体の上に順次、黒色の金属化合物からなる遮光層、および上記遮光層の表面の黒色を保護する透光性ガラス層を有することを特徴とするものであり、本発明の撮像装置は、少なくとも二枚のレンズを含むレンズ群、上記レンズ群の少なくとも各周縁部を保持する保持装置、上記レンズ群の上記周縁部が上記保持装置により保持された状態において上記レンズ間に挿設された遮光体を有する撮像装置であって、当該遮光体は上記のものであることを特徴とする。   The light-shielding body of the present invention solves the above-mentioned problem of surface damage and maintains the degree of light shielding highly and stably. The light-shielding body is composed of a black metal compound on the base and the base in order. And a light-transmitting glass layer that protects the black color of the surface of the light-shielding layer, and the imaging device of the present invention includes a lens group including at least two lenses, A holding device that holds at least each peripheral edge, and an imaging device that includes a light-shielding body inserted between the lenses in a state where the peripheral edge of the lens group is held by the holding device. It is characterized by that.

本発明の遮光体は、上記遮光層の表面に形成されたガラスからなる透光性ガラス層を有することにより、作業員の手や作業工具などと接触して擦られても上記透光性ガラス層の存在により上記した表面の損傷を解消して、黒色に基づく遮光度が安定する効果がある。また当該遮光体は、上記の優れた遮光機能を維持し得るので、それを用いた上記撮像装置は鮮明な各種画像の撮像を可能にする。   The light-shielding body of the present invention has the light-transmitting glass layer made of glass formed on the surface of the light-shielding layer, so that the light-transmitting glass can be rubbed even if it comes into contact with an operator's hand or a work tool. The presence of the layer eliminates the above-described surface damage and has an effect of stabilizing the light shielding degree based on black. Moreover, since the said light-shielding body can maintain said outstanding light-shielding function, the said imaging device using it enables imaging of various clear images.

本発明の実施の形態１における、遮光体を含むレンズユニットの断面図である。It is sectional drawing of the lens unit containing the light-shielding body in Embodiment 1 of this invention. 本発明の実施の形態１における撮像装置の概念的断面図である。1 is a conceptual cross-sectional view of an imaging apparatus according to Embodiment 1 of the present invention. 図１および図２に示す遮光体の平面図および断面図である。It is the top view and sectional drawing of the light-shielding body shown in FIG. 1 and FIG. 図３に示す遮光体の詳細な断面図である。FIG. 4 is a detailed cross-sectional view of the light shield shown in FIG. 3.

実施の形態１．
以下、図面を参照して本発明の実施の形態１を詳細に説明する。図１〜図４は、本発明の実施の形態１における遮光体例およびそれを含む撮像装置例を説明するものであって、図１は上記遮光体を含むレンズユニットの断面図であり、図２は本発明の撮像装置例の概念的断面図であり、図３aは図１〜図２に含まれている遮光体３の平面図、図３ｂは図３aのＡ−Ａ線に沿った当該遮光体の断面図であり、図４は図３aのＡ−Ａ線に沿った他の、且つ詳細な断面図である。 Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings. 1 to 4 illustrate an example of a light shielding body and an example of an imaging device including the same in Embodiment 1 of the present invention. FIG. 1 is a cross-sectional view of a lens unit including the light shielding body. FIG. 3A is a conceptual cross-sectional view of an example of an imaging apparatus of the present invention, FIG. 3A is a plan view of a light shielding body 3 included in FIGS. 1 and 2, and FIG. 3B is the light shielding along the line AA in FIG. FIG. 4 is another and detailed cross-sectional view taken along line AA of FIG. 3a.

図１において、レンズユニット１は、一対のレンズ１１とレンズ１２、および遮光体３とから構成されている。レンズ１１、レンズ１２、および遮光体３は、共に同外径を有する円盤状体である。また遮光体３は、図１〜図４に示すように、その中央に円形の貫通孔を有し、一方、レンズ１１とレンズ１２とは、共に平板体の一面の中央に窪みが設けられた形状を有する。よって、遮光体３をレンズ１１とレンズ１２とで挟んで、且つ遮光体３の中央の円形貫通孔の位置とレンズ１１、レンズ１２の上記の各窪みの位置が合致するようにすると、当該３者の結合体は、図１、図２に示す断面構造を有することになる。一対のレンズ１１と１２とは、その両者で遮光体３を挟んだ状態では、図１、２に示すように、当該両者間の中央部には上記窪みのためにレンズ状の空間が生じている。   In FIG. 1, the lens unit 1 includes a pair of lenses 11, a lens 12, and a light shield 3. The lens 11, the lens 12, and the light blocking body 3 are disk-shaped bodies having the same outer diameter. As shown in FIGS. 1 to 4, the light shielding body 3 has a circular through hole in the center thereof, while the lens 11 and the lens 12 are both provided with a recess in the center of one surface of the flat plate body. Has a shape. Therefore, when the light shielding body 3 is sandwiched between the lens 11 and the lens 12 and the positions of the circular through holes at the center of the light shielding body 3 are matched with the positions of the respective depressions of the lens 11 and the lens 12, the 3 The combined body has the cross-sectional structure shown in FIGS. In a state where the pair of lenses 11 and 12 sandwich the light shielding body 3 between them, as shown in FIGS. 1 and 2, a lens-like space is generated in the central portion between the two due to the depression. Yes.

遮光体３は、図３および図４にその断面図例を示すように、ドーナツ状体であって、断面が矩形状の基体３１、基体３１の全表面に形成された遮光層３２、および遮光層３２の表面上に形成されて、透明なガラスからなる透光性ガラス層３３を有する。なお図１〜図４では上記ドーナツ状体の内円を形成する孔の側面の形状例として、ドーナツ状体の表裏両面に対して直交する側面が例示されているが、本発明においては、当該側面の表面形状は、上記直交側面に限らず、各種の形状であっても良い。例えば当該表面は、その厚みの中間部がなだらかな山状のもの、急峻な山状に膨れた凸状のもの、当該中間部が上記とは反対に窪んだ凹状のもの、あるいは当該表面のエッジ部が盛り上がったもの、などが例示される。   3 and FIG. 4, the light shielding body 3 is a donut-shaped body having a rectangular cross section 31, a light shielding layer 32 formed on the entire surface of the base 31, and the light shielding. A transparent glass layer 33 made of transparent glass is formed on the surface of the layer 32. 1 to 4, as examples of the shape of the side surface of the hole forming the inner circle of the donut-shaped body, side surfaces orthogonal to both the front and back surfaces of the donut-shaped body are illustrated, but in the present invention, The surface shape of the side surface is not limited to the orthogonal side surface, and may be various shapes. For example, the surface has a gentle mountain shape at the middle of the thickness, a convex shape that swells in a steep mountain shape, a concave shape in which the middle portion is recessed opposite to the above, or an edge of the surface Examples of raised parts are exemplified.

基体３１の構成材料としては、その表面に上記の遮光層３２の形成が可能な材料であれば特に制限はなく、例えばステンレス、銅と各種の銅合金、ニッケル、アルミニウム、プラスチックス、セラミックなどである。上記のステンレスとしては、斯界で周知のものを採用し得て、例えば耐食性の優れた１２％（重量％、以下同様）以上のＣｒを含むＦｅ−Ｃｒ−Ｎｉ系合金類、フェライト系合金類、マルテンサイト系合金類、オーステナイト系合金類、フェライト−オーステナイト系合金類などが例示される。銅としては、純度が ９９．９６重量％以上のものであってよく、上記の銅合金としてはリン青銅や黄銅などであってよい。ニッケルとしては、純度が少なくとも９９重量％の高純度ニッケル以外にも、各種のニッケル合金が使用可能である。プラスチックスとしては、その上に前記した遮光層３２および透光性ガラス層３３を後記する方法で形成可能な耐熱性、および本発明の撮像装置の使用温度以上の耐熱変形性を有するものであれば、各種の熱可塑性樹脂や熱硬化性樹脂が用いられる。セラミックとしても、上記プラスチックスと同様の形成可能性および耐熱変形性を有するものであればよい。   The constituent material of the base 31 is not particularly limited as long as the light shielding layer 32 can be formed on the surface thereof. For example, stainless steel, copper and various copper alloys, nickel, aluminum, plastics, ceramics, etc. is there. As the above stainless steel, those well known in the art can be adopted. For example, Fe—Cr—Ni alloys, ferrite alloys containing 12% (% by weight, the same applies hereinafter) or more of Cr having excellent corrosion resistance, Examples include martensitic alloys, austenitic alloys, and ferrite-austenite alloys. Copper may have a purity of 99.96% by weight or more, and the copper alloy may be phosphor bronze or brass. As nickel, various nickel alloys can be used in addition to high-purity nickel having a purity of at least 99% by weight. The plastics may have heat resistance that can be formed by the method described later on the light shielding layer 32 and the light transmissive glass layer 33 thereon, and heat resistance that is higher than the operating temperature of the imaging device of the present invention. For example, various thermoplastic resins and thermosetting resins are used. Any ceramic may be used as long as it has the same formability and heat distortion resistance as the above plastics.

次に遮光体３の一例に就き詳述すると、図４において、遮光層３２は、ニッケルめっきからなる下地層３２１、銅からなる中間層３２２、黒色被膜層３２３、および透光性ガラス層３３の４層から形成されている。黒色被膜層３２３を形成する上記金属化合物の例としては、銅酸化物、クロム酸化物、ニッケル酸化物、亜鉛・クロム・銀酸化物、染料で染めたアルミニウム酸化物、からなる群から選ばれた少なくとも１種、が例示される。   Next, an example of the light shielding body 3 will be described in detail. In FIG. 4, the light shielding layer 32 includes an underlayer 321 made of nickel plating, an intermediate layer 322 made of copper, a black coating layer 323, and a translucent glass layer 33. It is formed from four layers. Examples of the metal compound forming the black coating layer 323 were selected from the group consisting of copper oxide, chromium oxide, nickel oxide, zinc / chromium / silver oxide, and dyed aluminum oxide. At least one is exemplified.

上記の下地層３２１を形成するニッケルめっきや中間層３２２を形成する銅めっきなどは、それぞれ従来から斯界で知られた方法並びに条件によって形成されてよく、例えば上記のニッケルめっきは、ニッケルストライクめっき浴を使用して、５Ａ／ｄｍ２で５分間めっきし、銅めっき３２２は硫酸銅めっき浴を使用して１Ａ／ｄｍ２で１０分間めっきすることにより形成されてよく、ニッケルめっきの厚みは０.５μｍ〜１μｍ程度であり、銅めっきの厚みは１μｍ〜２μｍ程度でよい。 The nickel plating for forming the base layer 321 and the copper plating for forming the intermediate layer 322 may be formed by methods and conditions conventionally known in the art. For example, the nickel plating is a nickel strike plating bath. The copper plating 322 may be formed by plating at 1 A / dm 2 for 10 minutes using a copper sulfate plating bath, and the thickness of the nickel plating is 0. 5A / dm 2 . The thickness of the copper plating may be about 1 μm to 2 μm.

本発明において、透光性ガラス層３３は透光性ガラスにて形成されており、当該ガラス材としては、遮光体３２の上にそれを形成可能な透光性材料にて形成されたものであれば特に制限はないが、遮光体３２の表面上への形成の容易さ、および形成後における機械的強度の安定性の観点から、ＪＩＳ Ｋ５６００−６−３に規定された耐熱性を有するものが好ましく、さらに遮光体３２上への形成可能温度が室温〜６０℃程度であり、透光性ガラス層３３の平均厚みが２μｍ〜４μｍ程度であり、またエンピツ硬度法で測定した表面硬度が４Ｈ以上であることが好ましい。   In the present invention, the translucent glass layer 33 is formed of translucent glass, and the glass material is formed of a translucent material capable of forming it on the light shielding body 32. There is no particular limitation as long as it has any heat resistance as defined in JIS K5600-6-3 from the viewpoint of ease of formation on the surface of the light shielding body 32 and stability of mechanical strength after the formation. Further, the temperature that can be formed on the light shielding body 32 is about room temperature to 60 ° C., the average thickness of the translucent glass layer 33 is about 2 μm to 4 μm, and the surface hardness measured by the pencil hardness method is 4H. The above is preferable.

上記透光性ガラスの例としては、例えば無機ガラス類、有機ガラス類、無機ガラスと有機ガラスとの化学的あるいは物理的混合体類などであってよい。たとえば、ＳｉＯ２を主成分とする通常の各種のガラス類であってよく、有機ガラス類としては、例えばＳｉＯ主鎖にＳｉ−Ｒ３基（Ｒは、アルキル基、アラルキル基、ＯＨ基など）が置換したものが例示される。また上記以外にも、メタクリル樹脂、メタクリル酸メチル樹脂、ポリスチレン、不飽和ポリエステル樹脂、ポリ塩化ビニルなどの、硬度と透明性が良好なものが例示される。 Examples of the translucent glass may be, for example, inorganic glasses, organic glasses, chemical or physical mixtures of inorganic glass and organic glass, and the like. For example, it may be various kinds of ordinary glasses mainly composed of SiO 2 , and examples of organic glasses include Si—R 3 group (for example, R is an alkyl group, aralkyl group, OH group) in the SiO main chain. Are substituted. In addition to the above, those having good hardness and transparency such as methacrylic resin, methyl methacrylate resin, polystyrene, unsaturated polyester resin, and polyvinyl chloride are exemplified.

透光性ガラス層３３が上記の無機ガラス類で形成される場合、当該層３３は、例えば通常のゾルゲル法やそのゾルゲル法を改良したスーパーゾルゲル法などにより形成することができる。即ち通常のゾルゲル法では、原料混合液に水や反応触媒を添加し、加水分解や縮合反応によりゾルを生成し、さらにかかる反応を進め、あるいは溶媒を除去してゲル化し、次いで当該ゲルを加熱硬化してガラス化する。一方、スーパーゾルゲル法では、原料混合液に反応触媒を添加し、溶媒除去した後、空気中の湿気により加水分解および縮合反応を開始せしめ、次いで室温硬化せしめてガラス化する。従って、通常のゾルゲル法では、ゲルのガラス化に加熱が必要となるので、その加熱によって遮光体３２の一部が崩壊あるいは変形する問題が生じる可能性があるが、スーパーゾルゲル法では、室温硬化にてガラス化するので上記の問題が生じない利点がある。   When the translucent glass layer 33 is formed of the above inorganic glass, the layer 33 can be formed by, for example, a normal sol-gel method or a super sol-gel method obtained by improving the sol-gel method. That is, in the normal sol-gel method, water or a reaction catalyst is added to a raw material mixture, and a sol is generated by hydrolysis or condensation reaction. Further, the reaction proceeds, or the solvent is removed to gel, and then the gel is heated. Harden and vitrify. On the other hand, in the super sol-gel method, a reaction catalyst is added to a raw material mixture, the solvent is removed, hydrolysis and condensation reactions are started by moisture in the air, and then the glass is cured at room temperature. Therefore, in the normal sol-gel method, heating is necessary for vitrification of the gel. Therefore, there is a possibility that a part of the light shielding body 32 is collapsed or deformed by the heating. There is an advantage that the above-mentioned problems do not occur because the glass is vitrified.

上記スーパーゾルゲル法に用いられる材料例としては、ナノコンポジットが挙げられる。ナノコンポジットは、シリカ粒からなる層中に、粒径が１〜１００ｎｍ程度の超微細な1種のポリマー粒または複数の各種のポリマー粒の混合物が、シリカを海とし、ポリマーを島とする海島状態で分散した構造を有するものであって、例えば日東紡社の商品名ＳＳＧコートが例示される。またナノコンポジットは、室温で硬化して透明なガラス状被膜を形成するので、本発明の上記透光性ガラス層３３の形成材として特に好適である。   Examples of the material used for the super sol-gel method include nanocomposites. A nanocomposite is a sea island in which a layer of silica particles is composed of one ultrafine polymer particle having a particle size of about 1 to 100 nm or a mixture of various polymer particles, with silica as the sea and polymers as islands. For example, a product name SSG coat of Nittobo Co., Ltd. is exemplified. In addition, the nanocomposite is cured at room temperature to form a transparent glassy film, and thus is particularly suitable as a material for forming the translucent glass layer 33 of the present invention.

次に、本発明の遮光体３の製造方法例に就き説明する。この製造例においては、基体３１の表面に機械的に安定した遮光層３２を形成するために、当該表面を前処理し、次いで遮光層３２を形成することが好ましい。かかる前処理の方法としては、アルカリ性洗剤を用いた脱脂、および電解脱脂をした後に、塩酸などの酸を用いた酸洗浄で表面を活性化し、後記する方法にて本発明の遮光層３２を形成する。   Next, an example of a method for manufacturing the light shield 3 according to the present invention will be described. In this production example, in order to form a mechanically stable light shielding layer 32 on the surface of the substrate 31, it is preferable to pretreat the surface and then form the light shielding layer 32. As the pretreatment method, after degreasing using an alkaline detergent and electrolytic degreasing, the surface is activated by acid cleaning using an acid such as hydrochloric acid, and the light shielding layer 32 of the present invention is formed by the method described later. To do.

本発明において、上記の方法で清浄化された遮光体３の表面に、下記の方法で直接、遮光層３２を形成しても良いが、好ましくは遮光層３２を構成する材料と化学的に親和性のある第三の材料からなる親和層を形成し、その上に遮光層３２を形成することが好ましい。かかる親和層としては、遮光層３２が銅酸化物／クロム酸化物／ニッケル酸化物からなる場合は、ニッケルめっき層が好ましく、亜鉛・クロム・銀酸化物からなる場合には、ニッケル＋銅めっき層が好ましい。   In the present invention, the light shielding layer 32 may be directly formed on the surface of the light shielding body 3 cleaned by the above method by the following method, but preferably chemically compatible with the material constituting the light shielding layer 32. It is preferable to form an affinity layer made of a third material having a property and form the light shielding layer 32 thereon. As the affinity layer, when the light shielding layer 32 is made of copper oxide / chromium oxide / nickel oxide, a nickel plating layer is preferable. When the light shielding layer 32 is made of zinc / chromium / silver oxide, a nickel + copper plating layer is used. Is preferred.

基体３１の表面（ステンレスの表面）に形成される遮光層３２の平均厚みは、一般的には３〜５μｍ程度、好ましくは２〜３μｍ程度、特に好ましくは１〜２μｍ程度である。   The average thickness of the light shielding layer 32 formed on the surface of the substrate 31 (stainless steel surface) is generally about 3 to 5 μm, preferably about 2 to 3 μm, and particularly preferably about 1 to 2 μm.

次に、図２により本発明の撮像装置の例を説明すると、当該撮像装置例は、これまでに詳述したレンズユニット１、およびフィルター４、イメージセンサー５、並びに外枠体６から構成されている。外枠体６は、半割り可能な筒状体であって、その内壁にレンズユニット１を挿着可能なリング状溝部６１、およびフィルター４を設置するためのリング状突起６２を有する。当該撮像装置は、外枠体６を半割りに近い状態においてリング状突起６２の上にフィルター４を設置し、リング状溝部６１にレンズユニット１を挿着し、次いで外枠体６を半割り状態から筒状態とし、筒状態の下部にイメージセンサー５を設置することにより完成する。   Next, an example of the image pickup apparatus of the present invention will be described with reference to FIG. 2. The image pickup apparatus example includes the lens unit 1, the filter 4, the image sensor 5, and the outer frame body 6 described in detail so far. Yes. The outer frame body 6 is a cylindrical body that can be divided in half, and has a ring-shaped groove portion 61 into which the lens unit 1 can be inserted and a ring-shaped protrusion 62 for installing the filter 4 on its inner wall. In the imaging apparatus, the filter 4 is installed on the ring-shaped protrusion 62 in a state where the outer frame body 6 is almost halved, the lens unit 1 is inserted into the ring-shaped groove 61, and then the outer frame body 6 is halved. The state is changed from the state to the tube state, and the image sensor 5 is installed in the lower portion of the tube state.

以下、本発明を実施例と比較例とにより一層詳細に説明する。
実施例１．
遮光体３の基体３１として、Ｃｒ含有量が１８重量％、Ｎｉ含有量が８重量％であって、残部がＦｅであるＦｅ−Ｃｒ−Ｎｉステンレスからなる、厚さ０．０２ｍｍ、外径２．５ｍｍ、内径０．５ｍｍのドーナツ状のステンレス板を用い、先ずその全面を、脱脂、酸洗い、および電解脱脂を順次行って清浄化し、次いで温度２５℃のニッケルストライクめっき浴にて５Ａ／ｄｍ２の電流密度で５分間めっきすることで、厚さ０．５μｍの下地ニッケル層を形成し、更に、当該下地ニッケル層の上に温度２５℃の硫酸銅めっき浴にて１Ａ／ｄｍ２の電流密度で１０分めっきし、厚さ２μｍの銅めっき層を形成してから、当該銅めっき層について、温度９５℃の亜塩素酸ソーダ溶液に１分間浸漬して酸化処理することで、当該銅めっき層の表面全体に平均厚さが２μｍの黒色酸化銅層を形成した。次いでこの黒色酸化銅層の全表面に、日東紡社の商品名ＳＳＧコートを塗布し、大気中の室温下７日間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例１の遮光層を得た。 Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples.
Example 1.
The base 31 of the light-shielding body 3 is made of Fe—Cr—Ni stainless steel having a Cr content of 18% by weight, a Ni content of 8% by weight, and the balance being Fe. Using a donut-shaped stainless steel plate having a diameter of 0.5 mm and an inner diameter of 0.5 mm, the entire surface is first cleaned by degreasing, pickling, and electrolytic degreasing sequentially, and then 5 A / dm in a nickel strike plating bath at a temperature of 25 ° C. By plating at a current density of 2 for 5 minutes, a base nickel layer having a thickness of 0.5 μm is formed, and further, a current of 1 A / dm 2 is applied on the base nickel layer in a copper sulfate plating bath at a temperature of 25 ° C. After plating at a density of 10 minutes to form a copper plating layer having a thickness of 2 μm, the copper plating layer is immersed in a sodium chlorite solution at a temperature of 95 ° C. for 1 minute and subjected to oxidation treatment, whereby the copper plating is performed. The entire surface of the layer Average thickness was formed a black copper oxide layer of 2μm to. Next, an SSG coat having a trade name of Nittobo Co., Ltd. was applied to the entire surface of the black copper oxide layer, and the SSG coat was cured and vitrified by allowing it to stand at room temperature in the atmosphere for 7 days, so that the average thickness was 2 μm. A light-shielding layer of Example 1 was obtained by forming a light glass layer.

実施例２．
遮光体３の基体３１として、Ｃｒ含有量が１８重量％、Ｎｉ含有量が８重量％であって、残部がＦｅであるＦｅ−Ｃｒ−Ｎｉステンレスからなる、厚さ０．０２ｍｍ外径２．５ｍｍ内径０．５ｍｍのドーナツ状のステンレス板を用い、先ずその全面を、脱脂、酸洗い、および電解脱脂により清浄化し、次いで温度２０℃の黒クロムめっき浴にて４Ｖの電圧で５分間めっきし、厚さ０．１μｍの黒色酸化クロム層を形成した。次いでこの黒色酸化クロム層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例２の遮光層を得た。 Example 2
The base 31 of the light-shielding body 3 is made of Fe—Cr—Ni stainless steel having a Cr content of 18% by weight, a Ni content of 8% by weight and the balance being Fe, and a thickness of 0.02 mm. Using a donut-shaped stainless steel plate having a 5 mm inner diameter and 0.5 mm inner diameter, the entire surface is first cleaned by degreasing, pickling and electrolytic degreasing, and then plated for 5 minutes at a voltage of 4 V in a black chromium plating bath at a temperature of 20 ° C. A black chromium oxide layer having a thickness of 0.1 μm was formed. Next, the SSG coat is applied to the entire surface of the black chromium oxide layer, and is left to stand for 7 days at room temperature in the atmosphere. The SSG coat is cured and vitrified to obtain a translucent glass layer having an average thickness of 2 μm. As a result, a light shielding layer of Example 2 was obtained.

実施例３．
遮光体３の基体３１として、実施形態１で用いたドーナツ状のステンレス板を用い、先ずその全面を、脱脂、酸洗い、および電解脱脂により清浄化し、次いで温度２５℃のニッケルストライクめっき浴にて５Ａ／ｄｍ２の電流密度で５分めっきすることで、厚さ０．５μｍの下地ニッケルめっき層を形成し、そのニッケルめっき層の表面を希硫酸で洗浄した後に黒ニッケルめっき浴（３０℃）にて０．１Ａ／ｄｍ２の電流密度で５分めっきし、厚さ０．１μｍの黒色酸化ニッケル層を形成した。次いでこの黒色酸化ニッケル層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例３の遮光層を得た。 Example 3
The donut-shaped stainless steel plate used in the first embodiment is used as the base 31 of the light-shielding body 3, and the entire surface is first cleaned by degreasing, pickling, and electrolytic degreasing, and then in a nickel strike plating bath at a temperature of 25 ° C. By plating at a current density of 5 A / dm 2 for 5 minutes, a 0.5 μm-thick underlying nickel plating layer is formed, and the surface of the nickel plating layer is washed with dilute sulfuric acid, and then a black nickel plating bath (30 ° C.) Was plated for 5 minutes at a current density of 0.1 A / dm 2 to form a black nickel oxide layer having a thickness of 0.1 μm. Next, the SSG coat is applied to the entire surface of the black nickel oxide layer, and the SSG coat is cured and vitrified by allowing it to stand at room temperature in the atmosphere for 7 days. The translucent glass layer having an average thickness of 2 μm. As a result, a light shielding layer of Example 3 was obtained.

実施例４．
遮光体３の基体３１として、実施形態１で用いられたドーナツ状のステンレス板を用い、先ずその全面を、脱脂、酸洗い、電解脱脂により清浄化し、次いでニッケルストライクめっき浴（２５℃）にて５Ａ／ｄｍ２の電流密度で５分めっきすることで厚さ０．５μｍの下地ニッケル層を形成し、その後、当該下地ニッケル層の上に硫酸銅めっき浴（２５℃）にて１Ａ／ｄｍ２の電流密度で１０分めっきし、厚さ２μｍの銅めっき層を形成してから、更に、当該銅めっき層の上にノーシアン亜鉛めっき浴（３０℃）にて４Ａ／ｄｍ２の電流密度で１５分めっきし、厚さ５μの亜鉛めっき層を形成してから、当該亜鉛めっき層について、黒クロメート処理液（２０℃）に３分間浸漬し、酸化処理することで、当該亜鉛めっき層の表面全体に０．１μｍ以下の厚みの黒色酸化亜鉛・クロム・銀層（黒クロメート皮膜）を形成した。次いでこの酸化亜鉛・クロム・銀層層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間時間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例４の遮光層を得た。 Example 4
The donut-shaped stainless steel plate used in the first embodiment is used as the base 31 of the light-shielding body 3, and the entire surface is first cleaned by degreasing, pickling, and electrolytic degreasing, and then in a nickel strike plating bath (25 ° C.). A base nickel layer having a thickness of 0.5 μm is formed by plating at a current density of 5 A / dm 2 for 5 minutes, and then 1 A / dm 2 in a copper sulfate plating bath (25 ° C.) on the base nickel layer. After forming a copper plating layer having a thickness of 2 μm for 10 minutes at a current density of 15 μm, the copper plating layer was further coated with a non-cyanide zinc plating bath (30 ° C.) at a current density of 4 A / dm 2 on the copper plating layer. After partial plating and forming a zinc plating layer having a thickness of 5 μm, the entire surface of the zinc plating layer is immersed in the black chromate treatment solution (20 ° C.) for 3 minutes and oxidized. 0.1 Oxide black zinc-chromium-silver layer thickness of less than m (black chromate film) was formed. Next, the SSG coat is applied to the entire surface of the zinc oxide / chromium / silver layer, and left for 7 days at room temperature in the atmosphere to cure and vitrify the SSG coat, so that the average thickness is 2 μm. A light-transmitting glass layer was formed to obtain a light-shielding layer of Example 4.

実施例５.
遮光体３の基体３１として、実施形態１で用いられたドーナツ状のアルミニウム板を用い、先ずその全面を、脱脂および酸洗いにより清浄化し、次いで陽極酸化皮膜処理浴（２０℃）にて１．７Ａ／ｄｍ２の電流密度で酸化することで、厚さ１０μｍの陽極酸化皮膜層を形成し、その後、黒色染色液（クラリアントジャパン社のサノダル・ディープ・ブラックＭＬＷ 使用）を５５℃に保持してそれに１５分浸漬し、水洗の後、酢酸ニッケル溶液（９７℃）に１５分浸漬して封孔処理することで、黒色アルミニウムの陽極酸化皮膜処理（黒染）層を形成した。次いでこの黒色アルミニウムの陽極酸化皮膜処理（黒染）層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例５の遮光層を得た。 Example 5.
The doughnut-shaped aluminum plate used in the first embodiment is used as the base 31 of the light-shielding body 3. First, the entire surface is cleaned by degreasing and pickling, and then 1. Anodized film treatment bath (20 ° C.) By oxidizing at a current density of 7 A / dm 2 , an anodic oxide film layer having a thickness of 10 μm is formed, and then a black dyeing solution (using Clariant Japan's Sanodal Deep Black MLW) is maintained at 55 ° C. It was immersed in it for 15 minutes, washed with water, then immersed in a nickel acetate solution (97 ° C.) for 15 minutes and sealed to form a black aluminum anodic oxide film treatment (black dyeing) layer. Next, the SSG coat is applied to the entire surface of the black aluminum anodized film treatment (black dyeing) layer, and the SSG coat is cured and vitrified by leaving it at room temperature in the atmosphere for 7 days to obtain an average thickness. Formed a light-transmitting glass layer of 2 μm to obtain a light-shielding layer of Example 5.

実施例６.
遮光体３の基体３１として、純度が９９．９％、厚さ０．３ｍｍ、外形３ｍｍ、内径０．５ｍｍのドーナツ状の銅板を用い、先ずその全面を、脱脂、酸エッチング、酸洗浄により清浄化し、次いで亜塩素酸ソーダ溶液（９５℃）に１分間浸漬し、酸化処理することにより当該銅表面全体に平均厚さが２μｍの黒色酸化銅層を形成した。次いでこの黒色酸化銅層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を得た。 Example 6
A donut-shaped copper plate having a purity of 99.9%, a thickness of 0.3 mm, an outer shape of 3 mm, and an inner diameter of 0.5 mm is used as the base 31 of the light shielding body 3. First, the entire surface is cleaned by degreasing, acid etching, and acid cleaning. Then, it was immersed in a sodium chlorite solution (95 ° C.) for 1 minute and oxidized to form a black copper oxide layer having an average thickness of 2 μm on the entire copper surface. Next, the SSG coat is applied to the entire surface of the black copper oxide layer, and the SSG coat is cured and vitrified by allowing it to stand at room temperature in the atmosphere for 7 days, so that the average thickness is 2 μm. Got.

実施例７.
遮光体３の基体３１として、実施例６で用いられたドーナツ状の銅板を用い、先ずその全面を、脱脂、酸洗い、電解脱脂により清浄化し、次いで黒クロムめっき浴（２０℃）にて４Ｖの電圧で５分めっきし、厚さ０．１μｍの黒色酸化クロム層を形成した。次いでこの黒色酸化クロム層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間放置して上記ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例７の遮光層を得た。 Example 7.
The donut-shaped copper plate used in Example 6 was used as the base 31 of the light-shielding body 3, and the entire surface was first cleaned by degreasing, pickling, and electrolytic degreasing, and then 4 V in a black chrome plating bath (20 ° C.). Was plated for 5 minutes to form a black chromium oxide layer having a thickness of 0.1 μm. Next, the SSG coat is applied to the entire surface of the black chromium oxide layer, and is left to stand at room temperature in the atmosphere for 7 days to cure and vitrify the SSG coat, thereby translucent glass layer having an average thickness of 2 μm. As a result, a light shielding layer of Example 7 was obtained.

実施例８.
遮光体３の基体３１として、実施例６で用いられたドーナツ状の銅板を用い、先ずその全面を、脱脂、酸洗い、電解脱脂により清浄化し、次いでニッケルストライクめっき浴（２５℃）にて５Ａ／ｄｍ２の電流密度で５分めっきすることで、厚さ０．５μｍの下地ニッケル層を形成し、そのニッケルめっき層表面を希硫酸で洗浄した後に黒ニッケルめっき浴（３０℃）にて０．１Ａ／ｄｍ２の電流密度で５分めっきし、厚さ０．１μｍの黒色酸化ニッケル層を有する実施例８の遮光体を製造した。次いでこの黒色酸化ニッケル層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例８の遮光層を得た。 Example 8.
The donut-shaped copper plate used in Example 6 was used as the base 31 of the light-shielding body 3, and the entire surface was first cleaned by degreasing, pickling, and electrolytic degreasing, and then 5A in a nickel strike plating bath (25 ° C.). By plating for 5 minutes at a current density of / dm 2, a 0.5 μm-thick base nickel layer is formed, and the surface of the nickel plating layer is washed with dilute sulfuric acid and then washed with a black nickel plating bath (30 ° C.). The light shielding body of Example 8 having a black nickel oxide layer having a thickness of 0.1 μm was produced by plating at a current density of 1 A / dm 2 for 5 minutes. Next, the SSG coat is applied to the entire surface of the black nickel oxide layer, and the SSG coat is cured and vitrified by allowing it to stand at room temperature in the atmosphere for 7 days. The translucent glass layer having an average thickness of 2 μm. As a result, a light shielding layer of Example 8 was obtained.

実施例９.
遮光体３の基体３１として、実施例６で用いられたドーナツ状の銅板を用い、先ずその全面を、脱脂、酸洗い、電解脱脂により清浄化し、硫酸銅めっき浴（２５℃）にて１Ａ／ｄｍ2の電流密度で１０分めっきし、厚さ２μｍの銅めっき層を形成してから、更に、当該銅めっき層の上にノーシアン亜鉛めっき浴（３０℃）にて４Ａ／ｄｍ２の電流密度で１５間めっきし、厚さ５μｍ亜鉛めっき層を形成してから、当該亜鉛めっき層について、黒クロメート処理液（２０℃）に３分間浸漬し、酸化処理することで、当該亜鉛めっき層表面全体に０．１μｍ以下の厚みの黒色酸化亜鉛・クロム・銀層（黒クロメート皮膜）を有する実施例９の遮光体を製造した。次いでこの黒色酸化亜鉛・クロム・銀層の全表面に、上記ＳＳＧコートを塗布し、大気中の室温下で７日間放置して当該ＳＳＧコートを硬化しガラス化せしめて平均厚さが２μｍの透光性ガラス層を形成して実施例９の遮光層を得た。 Example 9.
The doughnut-shaped copper plate used in Example 6 was used as the base 31 of the light-shielding body 3, and the entire surface was first cleaned by degreasing, pickling, and electrolytic degreasing, and 1 A / in a copper sulfate plating bath (25 ° C.). After plating at a current density of dm 2 for 10 minutes to form a copper plating layer having a thickness of 2 μm, a current density of 4 A / dm 2 is further applied on the copper plating layer in a non-cyanide zinc plating bath (30 ° C.). After forming a zinc plating layer with a thickness of 15 μm by immersing the zinc plating layer in the black chromate treatment solution (20 ° C.) for 3 minutes and oxidizing it, the entire surface of the zinc plating layer is obtained. A light shielding body of Example 9 having a black zinc oxide / chromium / silver layer (black chromate film) having a thickness of 0.1 μm or less was prepared. Next, the SSG coat is applied to the entire surface of the black zinc oxide / chromium / silver layer, and is left to stand for 7 days at room temperature in the atmosphere. The SSG coat is cured and vitrified, and the average thickness is 2 μm. A light-shielding layer of Example 9 was obtained by forming a light glass layer.

次に、上記実施例１〜９で得られた各黒色遮光層付きのステンレス板、銅板、あるいはアルミニウム板を対象として、また比較例１として、上記実施例１とは透光性ガラス層が無い点のみが異なるものを用い、比較例２として、実施例５とは透光性ガラス層が無い点のみが異なるものを用い、また、比較例３として、実施例６とは透光性ガラス層が無い点のみが異なるものを用い、それらに就き、その効果を比較すると、透光性ガラス層を付加したことにより、黒色遮光層の表面が格段に安定し、取り扱い易く、使い易いものになっていることが確認できた。   Next, for the stainless steel plate, copper plate, or aluminum plate with each black light shielding layer obtained in Examples 1 to 9, and as Comparative Example 1, there is no translucent glass layer as in Example 1 above. As a comparative example 2, a material that differs from Example 5 only in that there is no translucent glass layer is used. Also, as a comparative example 3, a translucent glass layer is different from Example 6. Compared to the effects of using different ones, there is no point, and by adding a translucent glass layer, the surface of the black shading layer becomes much more stable, easy to handle and easy to use. It was confirmed that

特に、その表面が外力に対して機械的に弱い比較例１と実施例１との対比、および比較例１と同様の比較例３と実施例６との対比において、透光性ガラス層の有無による差が顕著であった。また、透光性ガラス層を形成するためのコーテイング剤（ベース）にガラスの微粒子をマット剤（つや消し剤）として添加することにより、反射率を広範囲に調整することが容易にできることから、本発明の遮光体は、広範囲な素材に対して、安定した特性のものを、取り扱いし易いものとして、提供することができる。 In particular, in the comparison between Comparative Example 1 and Example 1 whose surface is mechanically weak against external force, and in the comparison between Comparative Example 3 and Example 6 similar to Comparative Example 1, the presence or absence of a translucent glass layer The difference by was remarkable. In addition, since the fine particles of glass are added as a matting agent (matting agent) to the coating agent (base) for forming the translucent glass layer, the reflectance can be easily adjusted over a wide range. The light-shielding body can be provided with a stable characteristic for a wide range of materials as being easy to handle.

本発明の遮光体は極めて優れた遮光性能を有するので、当該遮光体を用いた本発明の撮像装置は、携帯用カメラ、デジタルカメラ、ビデオカメラなど、撮像を目的とした機器のレンズの遮光板および光学機器の分野で使用される撮像装置用として好適である。   Since the light-shielding body of the present invention has extremely excellent light-shielding performance, the imaging device of the present invention using the light-shielding body is a light-shielding plate for a lens of a device intended for imaging such as a portable camera, a digital camera, or a video camera. And suitable for an imaging apparatus used in the field of optical equipment.

１：レンズユニット、３：遮光体、３２：遮光層、３３：透光性ガラス層、
４：フィルター、５：イメージセンサー、６：外枠体、６１：リング状溝部、
６２：リング状突起 1: lens unit, 3: light-shielding body, 32: light-shielding layer, 33: translucent glass layer,
4: Filter, 5: Image sensor, 6: Outer frame, 61: Ring-shaped groove,
62: Ring-shaped protrusion

Claims (7)

基体、上記基体の上に順次、黒色の金属化合物からなる遮光層、および上記遮光層の表面の黒色を保護すると共に８０℃以上の耐熱性を有する透光性ガラス層を有することを特徴とする遮光体。   A substrate, a light-shielding layer made of a black metal compound, and a light-transmitting glass layer that protects the black color of the surface of the light-shielding layer and has a heat resistance of 80 ° C. or higher are sequentially provided on the substrate. Shading body. 上記基体は板状であって、ステンレス、ニッケル、銅、銅合金、アルミニウム、プラスチックス、およびセラミックスからなる群から選ばれた少なくとも一種で形成されていることを特徴とする請求項1に記載の遮光体。   2. The substrate according to claim 1, wherein the substrate is plate-shaped and is formed of at least one selected from the group consisting of stainless steel, nickel, copper, copper alloy, aluminum, plastics, and ceramics. Shading body. 上記黒色の金属化合物は、銅酸化物、クロム酸化物、ニッケル酸化物、亜鉛酸化物、およびアルミニウム酸化物を染料で染色したものからなる群から選ばれた少なくとも一種であることを特徴とする請求項1に記載の遮光体。   The black metal compound is at least one selected from the group consisting of copper oxide, chromium oxide, nickel oxide, zinc oxide, and aluminum oxide dyed with a dye. Item 2. The light shielding member according to Item 1. 上記透光性ガラス層は、厚さ２μｍ〜４μｍであることを特徴とする請求項1に記載の遮光体。   The light-shielding body according to claim 1, wherein the translucent glass layer has a thickness of 2 μm to 4 μm. 上記透光性ガラス層は、無機ガラスと有機ポリマーとの混合体からなることを特徴とする請求項４に記載の遮光体。   The light-shielding body according to claim 4, wherein the translucent glass layer is made of a mixture of an inorganic glass and an organic polymer. 上記透光性ガラス層は、シリカ粒子と平均粒径が１〜１００ナノメートルの有機ポリマーとからなるナノコンポジットにて形成されたものであることを特徴とする請求項５に記載の遮光体。   The light-shielding body according to claim 5, wherein the translucent glass layer is formed of a nanocomposite composed of silica particles and an organic polymer having an average particle diameter of 1 to 100 nanometers. 少なくとも二枚のレンズを含レンズ群、上記レンズ群の少なくとも各周縁部を保持する保持装置、上記レンズ群の上記周縁部が上記保持装置により保持された状態において上記レンズ間に挿設された遮光体を有する撮像装置であって、上記遮光体は上記請求項１〜６のいずれか一項に記載のものであることを特徴とする撮像装置。   A lens group including at least two lenses, a holding device that holds at least each peripheral portion of the lens group, and a light shield inserted between the lenses in a state where the peripheral portion of the lens group is held by the holding device. An imaging apparatus having a body, wherein the light shielding body is the one according to any one of claims 1 to 6.
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