JP2004187248A - Television camera apparatus for photographing skin - Google Patents

Television camera apparatus for photographing skin Download PDF

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Publication number
JP2004187248A
JP2004187248A JP2002382756A JP2002382756A JP2004187248A JP 2004187248 A JP2004187248 A JP 2004187248A JP 2002382756 A JP2002382756 A JP 2002382756A JP 2002382756 A JP2002382756 A JP 2002382756A JP 2004187248 A JP2004187248 A JP 2004187248A
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light emitting
light
emitting element
skin
red
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Inventor
Makoto Dejima
孚 出島
Reiko Umezaki
礼子 梅崎
Yasuo Takekoshi
保夫 竹越
Masaki Imaizumi
正喜 今泉
Toshio Shimoda
登志雄 下田
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Earth Green Kk
Mamiya OP Co Ltd
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Earth Green Kk
Mamiya OP Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a television camera apparatus for photographing a skin which is simple, improves productivity and has an illumination mechanism for making possible imaging on a surface of the skin, imaging inside of the skin and highly functional color imaging. <P>SOLUTION: Within a closed case, light emitting element groups for illumination each composed of a plurality of horizontal light emitting element lines are separately disposed on two surfaces above and under an optical axis, and a subject abutted to a photographing window opened on the top of the case is illuminated from the inside. Reflected light from an object forms an image on an imaging device 4 by a proximate photographing lens 3. Two kinds of rectangular polarizing plates are disposed on front surfaces of the light emitting element groups for illumination and on an optical path of the reflected light, such that their vibrating directions become orthogonal, and an illumination mode is switched to correspond to two kinds of imaging on the surface of the skin and imaging inside of the skin. Besides, a control circuit is provided for switching the illumination mode for the unit of a frame by a still picture shutter switch. Further, light emitting elements are replaced with a set of light emitting elements having red, green and blue colors or having red, green, blue, ultraviolet and infrared colors to also configure an illumination system of a highly functional color camera. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】本発明は、肌の手入れや化粧のカウンセリングに使用される肌撮影用テレビカメラ装置に関し、特に2面型照明機構に関する。
【0002】
【従来の技術】現在、化粧品は広範な製品がいろいろな販売チャンネルで売られていて、市場にあふれているが、自分にはどのような化粧品が適しているのか一般の人が見極めるのは非常に難しい。またアドバイスを受ける機会は少ない。
【0003】そのようなニーズに対応する一つの方法として、肌撮影用テレビカメラを用いて、顔の肌を撮影し、肌の状態を診断して、その人に合った肌の手入れ方法と化粧品選定をカウンセリングすることが、化粧品販売店や美容院でかなり行われている。ほとんどは動画カメラでリアルタイムにモニタ画面を見ながらカウンセラーが肌の状態を判定し、カウンセリングを行っている。
【0004】この目的に使われるテレビカメラの多くは一つのケース内に近接撮影用レンズと撮像素子および照明が内蔵され、そして多くは照明角度差あるいは偏光板を利用して、表面反射光を主に用いて皮膚表面の形状を捉えるための照明モード(以下キメモードと呼ぶ)と表面反射光を除去して皮膚内部の状態を捉えるための照明モード(以下シミモードと呼ぶ)の2種類の撮影が出来るようになっている。
【0005】しかしながら、従来の肌撮影カメラは、下記に例示するように環状に配設された発光素子に角度を持たせたり、あるいは環状に配設された発光素子前面に細分化された偏光板を配置する等複雑な構造を有し、製造コストが高くなっている。また遠隔肌診断に適した静止画撮像のために必要な照明モードのフレーム切替の機構はほとんど持っていない。
特開平10−333057 CCDマイクロスコープ
この発明は、光軸Xの周囲に、内側の発光素子8と外側の発光素子9が異なる照射角度で二列に配列されている。観察孔2を皮膚に当てて、内側の発光素子8から観察孔2に対して直角に近い角度で照明光を照射させれば、皮膚表面の色や汚れを観察することができ、外側の発光素子9により観察孔2に対して斜め側方から照明光を照射させれば、皮膚表面の凹凸や細かい皺を観察できる。また、白色光,赤色光など色の異なる二種以上の発光素子を環状に配すれば、白色光で皮膚表面の色や汚れを、赤色光で皮膚内部のシミ,クスミ,黒ずみなどを観察できる。さらに、環状に配した複数の発光素子を所要数ずつ部分的に点灯させれば、任意の方向から照明光を照射することができるので、肌の表面に形成された細かな皺や凹凸のうち、照射方向に対して直角に近い角度で形成されたものを際立たせることができる。
【0006】
【発明が解決しようとする課題】しかしながらこれらの従来のカメラは、光軸の周囲に環状に発光素子を配列するものがほとんどで、環状に加工されたプリント基板上に発光素子が取り付けられていた。そして発光素子をいくつかのブロックに分け、ブロックごとに細分化された偏光板を配置していたので、生産性が悪く、コストがかさみ高価であった。
【0007】また従来のカメラは動画カメラとして使用し、リアルタイムにモニタ画像を見ながら診断するという使い方には適しているとしても、遠隔肌診断に必要な静止画をキメモード、シミモード両方について撮影する場合には、操作が面倒であった。
【0008】また面順次カラーカメラとして赤、緑、青の発光色を有する発光素子の組または赤、緑、青、赤外光、紫外光の発光素子の組を有する方式はほとんど提案されていない。
【0009】また従来のカメラは発光素子が光軸に対して対称な環状に配置されていたので、配光特性は発光素子の指向性、環状配置の直径、被写体と発光素子間の距離といった要素で決まり、調整は困難であった。
【0010】そこで本発明では、発光素子の配列を光軸上下に分離された2面構造、水平列配置とし、また照明モード切替のための偏光板を加工しやすい方形の形状2種類で済ませ、製造コストを大幅に減少させるとともに、遠隔肌診断のための静止画撮影を容易にするため、1回のシャッター操作でキメモード、シミモード両方の画像を得られるようなフレーム切替え照明制御回路を備え、また発光素子の電流を個別に調整して照明系の配光特性調整機能を持たせることを技術課題としている。
【0011】
【課題を解決するための手段】本発明の肌撮影用テレビカメラ装置は、ケース本体の前方に開設された撮影窓に対向してケース内部に配置されたレンズ、及びこのレンズを介して入射した光学像を撮像する撮像素子と、撮影窓の外部に接した被写体をケース内部から照明する照明機構から構成されている。
照明機構は、複数の発光素子が光軸の上下に分離された二つの面上にそれぞれ水平列状に発光素子列として配設されており、上下2面の光軸側にある発光素子列と光軸から離れた側の発光素子列はそれぞれ機能別の二つのブロックを形成し、かつこれら二つのブロックは独立に発光可能になされている。
光軸側にある発光素子列ブロックの発光面側及び被写体から撮像素子に向かう反射光の光路上に一定振動方向の光を透過する1枚の偏光板を設け、光軸から離れた側の発光素子列ブロックの発光面側には前記偏光板とは直交する振動方向の光を透過する第二の偏光板を上下2枚備えた構造をなすことにより、シンプルで生産性がよく、安い製造コストを可能としている。
また、静止画撮影用シャッタースイッチを備え、フレーム期間に同期して1フレームあるいは数フレーム毎に発光素子列ブロックの駆動電流切替を行い、キメモード、シミモードの切替を行う点灯制御回路により、1回の操作で二つの照明モードの静止画同時撮像を実現している。
高解像度カラー撮像または、高解像度カラー撮像と紫外光、赤外光撮像を一つの撮像素子で可能とする面順次撮像用照明機構もあわせて実現している。
また、発光素子毎に駆動電流調整回路を設け、被写体の撮像範囲にて配光特性をフラットに調整することができるようになっている。
【0012】請求項1に記載した肌撮影用テレビカメラ装置は、光軸の上下に分離された2面の照明と振動方向が直交する2種類の偏光板によりキメモード、シミモードの切替を可能とした構造を特徴とする。
【0013】請求項2に記載した肌撮影用テレビカメラ装置は、静止画撮影用シャッタースイッチから送られる電気信号によって、フレーム期間に同期して1フレームあるいは数フレームで発光素子列ブロックの駆動電流切替を行う構造を特徴とする。
【0014】請求項3に記載した肌撮影用テレビカメラ装置は赤、緑、青の発光色を有する発光素子の組によって面順次カラーカメラを、あるいは赤、緑、青の3原色に紫外光および赤外光を追加して高機能面順次カラーカメラを実現するための照明機構を有することを特徴とする。
【0015】請求項4に記載した肌撮影用テレビカメラ装置は請求項3の赤、緑、青の発光色を有する発光素子の代わりに白色発光素子と赤、緑、青の帯域通過フィルタを用いる構造を特徴とする。
【0016】請求項5に記載した肌撮影用テレビカメラ装置は、請求項3あるいは請求項4の赤、緑、青または赤、緑、青、赤外光、紫外光の照明をフレーム期間毎に順次点灯する点灯制御回路を用いることを特徴とする。
【0017】請求項6に記載した肌撮影用テレビカメラ装置は、光軸の上下2面の発光素子群とそれに対応する偏光板の組を上側1面だけにした構造を特徴とする。配光特性の精度を求められない用途では実用に供しうる。
【0018】請求項7に記載した肌撮影用テレビカメラ装置は、発光素子毎に電流調整回路を備え、被写体の撮像範囲内でフラットな配光特性になるよう調整できる配光特性制御回路を備えることを特徴とする。
【0019】
【発明の実施の形態】以下、発明の実施の形態を、図面に基づいて詳細に説明する。
【0020】図1は、本発明の肌撮影用テレビカメラ装置の光学系部分の構造を示す説明図である。ケース1には開口した撮影窓2が設けられ、肌などの被写体8は撮影窓2に接した状態である。被写体8の映像はレンズ3を介して撮像素子4に結像してテレビ信号に変換される。被写体への照明は、複数の発光素子6が照明基板5に搭載されて光軸の上下に分離された二つのエリアに配置され、内部から照明される。複合偏光板7は発光素子6の直前に配置される。
【0021】図2は照明基板5の構造を示す平面図である。基板9の中心は光軸中心と一致しており、被写体からの反射光を通過させるように開口部9が設けられている。図中に小さい円形で示す複数の発光素子6は上下に分離されたエリアに配置され、水平列をなしている。この発光素子列は、光軸に近い発光素子列11及び12は一つのブロックをなし、光軸から離れた側の発光素子列10及び13はもう一つのブロックを形成していて、二つのブロックは独立してブロック単位で点灯あるいは消灯できるように接続されている。
【0022】図3は複合偏光板7の構造を示す平面図である。偏光板15は水平振動方向を持った光を透過し、偏光板14及び16は垂直振動方向の光を透過する。偏光板15は図2の光軸側の発光素子列11、12及び開口部9の前面を覆うように配置されている。偏光板14は図2の発光素子列10を、偏光板16は発光素子列13のそれぞれ前面を覆うように配置されている。尚、偏光板15と偏光板14及び16は互いに振動方向が直交していればよく、偏光板15が垂直で偏光板14及び16が水平でも差し支えない。
【0023】図4は請求項3及び請求項4に対応する照明基板5の構造を示す平面図である。図2に示した発光素子を赤、緑、青の3原色の発光色を持った発光素子の組で置換した形である。光軸側の発光素子列18及び19は一つのブロックをなし、光軸から離れた側の発光素子列17及び20はもう一つのブロックを形成していて、二つのブロックは独立してブロック単位で点灯あるいは消灯できるように接続されている。それと同時に赤、緑、青の3原色の発光素子は同じ発光色毎に順次点灯するように駆動される接続となっている。
【0024】図5は赤、緑、青の3原色の発光色を持った発光素子の組の構造を示す配置図である。赤色の発光素子22、緑色の発光素子23、青色の発光素子24がひとまとまりで組を形成している。
【0025】図6は発光素子の組が赤、緑、青、紫外、赤外の5種類の発光色で構成した場合の配置の例を示す。
【0026】図7、図8、図9はいずれも請求項6に記載した内容を説明するための図で、発光素子群と対応する偏光板が共に上側1面にのみ配置された構造を示す。
【0027】図10は請求項2の点灯制御の動作を示すタイミングチャートである。
【0028】図11は請求項3または請求項4に示す赤、緑、青あるいは赤、緑、青、紫外、赤外の発光色を持った発光素子を駆動する場合のタイミングチャートである。
【0029】図12は肌撮影用テレビカメラ装置のブロック図である。
【0030】図13は請求項3または請求項4に示す赤、緑、青あるいは赤、緑、青、紫外、赤外の発光色を持った発光素子を用いた面順次方式高機能カラーカメラの波長スペクトラム図である。
【0031】以上が本発明の一例構成であって、次にその作用を説明する。
図1、図2、図3に示す光学系において、光軸側の発光素子列11及び12から発した光は偏光板15を透過し水平振動方向を持った偏光となって被写体8に照射される。表面反射された光は偏光を保っているが、同じ振動方向の偏光板15を通過してレンズ3を通り、撮像素子4に結像する。一方、光軸から離れた側の発光素子列10及び13から発した光は偏光板14及び16を通過して垂直振動方向を持った偏光となり、被写体8に照射されるが、表面反射光は垂直振動方向の偏光を保っているので、水平方向の偏光板15で阻止されて撮像素子には届かない。皮膚内部に入ってから反射される光は偏光板15を通過して撮像素子4に達する。
従って、光軸側の発光素子列11及び12が発光したときは表面反射光を活用した照明モードであるキメモード、光軸から離れた側の発光素子列10及び13が点灯した場合は表面反射光を除去したシミモードとなる。
【0032】図7、図8、図9は、2面構造の図1、図2、図3を上側1面のみ使用し、下側を省略した構造になる。従って基本的な作用は2面構造と同様である。
【0033】図10は請求項2に示す点灯制御回路の動作を示すタイミングチャートで、静止画撮影用シャッターパルス30が入力されると、フレーム期間に同期して光軸側の発光素子列が点灯し、照明光31が発生する。それによって撮像素子に電荷33が蓄積され、読み出されて映像信号35を形成する。
引き続いて光軸から離れた側の発光素子列が点灯し、同様の動作を行う。
【0034】図11は請求項3及び4に記載した赤、緑、青の発光色の発光素子組として動作させる場合のタイミングチャートである。静止画撮影用シャッターパルス30が入力されると、フレーム期間に同期して図5の青照明用発光素子24が点灯し、青照明出力37が1フレーム期間発生する。次いで緑照明用発光素子23が点灯し、緑照明出力38を発生させる。最後に赤照明用発光素子22が点灯し、赤照明出力39を発生させる。このように青色照明、緑色照明、赤色照明が順次点灯して被写体を照明し、被写体の像はレンズ3を通して撮像素子4に結像する。撮像素子からは青色照明、緑色照明、赤色照明に対応する青映像信号43、緑映像信号44、赤映像信号45が順次出力される。これら映像信号は図12に示す画像メモリ55に書き込まれ、次いで、青、緑、赤の各映像信号が同時に読み出されて、3原色カラー映像信号となって、画像表示回路56に送られ、テレビジョン信号に形成されて出力される。
赤、緑、青、紫外、赤外の場合も、上記に説明した赤、緑、青の発光素子組の場合と同様の動作を行い、赤、緑、青に紫外、赤外が追加された形である。この場合は赤、緑、青、紫外、赤外の各映像信号が生成させる。
尚、以上に述べた赤、緑、青の順次撮像サイクルあるいは赤、緑、青、紫外、赤外の順次撮像サイクルはキメモード、シミモードそれぞれについて1回ずつ行われる。
図13(A)は発光素子として赤、緑、青の発光ダイオードを用いた場合のスペクトラム図である。図13(B)は発光素子として白色発光ダイオードを用い、帯域通過フィルタと組み合わせた場合のスペクトラム図である。図13(C)は更に紫外、赤外の発光ダイオードを組み合わせた場合のスペクトラム図である。このように通常のカメラが撮像側で色分離するのに対し、請求項3または請求項4に示す発明は照明側で色分離する光学系を提供するものである。
【0035】図12は回路ブロック図で、静止画撮影用シャッターパルスが端子59から入力されるとMPU58を介して照明駆動回路51へ送られ、上述した照明駆動動作を行わせる。
【発明の効果】以上述べたように本発明は、従来よく見られる環状照明構造に対し生産性の優れたシンプルな構造を有し、製造コストを低く抑えることを可能としている。また遠隔診断に必要な静止画撮影のためのフレーム期間切替の照明制御回路を備え、シャッタースイッチ1回の操作でキメモード、シミモードの撮像を高速で行うことが出来る。
更に赤、緑、青あるいは赤、緑、青、紫外、赤外の発光素子の組を用いる構成では高画質を実現する面順次カラーカメラあるいは同カメラに紫外光、赤外光を追加した高機能面順次カラーカメラの光学系を実現し、肌撮影カメラとして高い性能が得られる。紫外光は皮膚表面形状の正確な観察に適し、赤外光はシミなどの皮膚内部の観察に適し、カラー映像と併せて可視光だけでは得られない高度な診断効果を期待できる。
一般に被写体の撮影エリアが比較的広い条件では配光特性の調整が難しくなるが、本発明では発光素子毎に駆動電流を調整する回路を備え、撮影エリアが広い場合でもフラットな配光特性を実現することができる。
【図面の簡単な説明】
【図1】本発明の光学系構造を示す説明図である。
【図2】発光素子を搭載した照明基板の平面図である。
【図3】複合偏光板の構造を示す平面図である。
【図4】請求項3及び4に対応する照明基板の構造を示す平面図である。
【図5】赤、緑、青の3原色の発光色を持った発光素子の組の構造を示す配置図である。
【図6】発光素子の組が赤、緑、青、紫外、赤外の5種類の発光色で構成した場合の配置図である。
【図7】上側1面の場合の光学系構造を示す説明図である。
【図8】上側1面の場合の照明基板の平面図である。
【図9】上側1面の場合の複合偏光板の構造を示す平面図である。
【図10】請求項2の点灯制御の動作を示すタイミングチャートである。
【図11】請求項3または4に示す赤、緑、青あるいは赤、緑、青、紫外、赤外の発光色を持った発光素子を駆動する場合のタイミングチャートである。
【図12】肌撮影用テレビカメラ装置のブロック図である。
【図13】請求項3または請求項4の作用を示す波長スペクトラム図である。
【符号の説明】
1 肌撮影用テレビカメラ装置の光学系のケース
2 撮影窓
3 レンズ
4 撮像素子
5 照明基板
6 発光素子
7 複合偏光板
8 被写体(肌)
9 開口部
10 発光素子列
11 発光素子列
12 発光素子列
13 発光素子列
14 垂直方向偏光板
15 水平方向偏光板
16 垂直方向偏光板
17 発光素子組の列
18 発光素子組の列
19 発光素子組の列
20 発光素子組の列
21 発光素子組
22 赤色発光素子
23 緑色発光素子
24 青色発光素子
25 赤色発光素子
26 緑色発光素子
27 青色発光素子
28 紫外発光素子
29 赤外発光素子
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera apparatus for photographing skin used for skin care and counseling of makeup, and more particularly to a two-sided illumination mechanism.
[0002]
2. Description of the Related Art At present, a wide variety of cosmetic products are sold through various sales channels and are overflowing the market, but it is very difficult for ordinary people to determine what kind of cosmetics are suitable for themselves. Difficult. Opportunities for advice are few.
As one method to meet such needs, a skin photographing television camera is used to photograph the skin of the face, diagnose the condition of the skin, and provide a skin care method and cosmetics suitable for the person. Counseling the selection is quite common at cosmetics stores and beauty salons. In most cases, a counselor judges the condition of the skin while watching the monitor screen in real time with a video camera, and provides counseling.
Many television cameras used for this purpose have a built-in lens for close-up photography, an image sensor, and illumination in a single case, and mainly use a difference in illumination angle or a polarizing plate to mainly reflect surface reflected light. There are two types of photography: an illumination mode for capturing the shape of the skin surface (hereinafter referred to as texture mode), and an illumination mode for removing the surface reflected light to capture the state inside the skin (hereinafter referred to as stain mode). It has become.
However, in the conventional skin photographing camera, as shown below, an annular light emitting element is provided with an angle, or a polarizing plate divided into a front surface of the annular light emitting element is provided. Have a complicated structure, such as arranging them, and the manufacturing cost is high. Further, there is almost no frame switching mechanism of the illumination mode necessary for still image capturing suitable for remote skin diagnosis.
In the present invention, an inner light emitting element 8 and an outer light emitting element 9 are arranged in two rows around an optical axis X at different irradiation angles. If the observation hole 2 is brought into contact with the skin and the illumination light is emitted from the inner light emitting element 8 at an angle close to a right angle to the observation hole 2, the color and dirt on the skin surface can be observed, and the outer light emission can be observed. By irradiating the observation hole 2 with illumination light from the oblique side by the element 9, irregularities and fine wrinkles on the skin surface can be observed. If two or more light emitting elements having different colors such as white light and red light are arranged in a ring, the color and dirt on the skin surface can be observed with white light, and spots, dark spots, and dark spots inside the skin can be observed with red light. . Furthermore, if a plurality of annularly arranged light emitting elements are partially turned on by a required number, illumination light can be emitted from an arbitrary direction, so that fine wrinkles and irregularities formed on the surface of the skin can be reduced. It is possible to make the one formed at a right angle to the irradiation direction stand out.
[0006]
However, most of these conventional cameras have light-emitting elements arranged in a ring around the optical axis, and the light-emitting elements are mounted on a printed circuit board processed in a ring. . Since the light-emitting element is divided into several blocks, and a polarizing plate divided into blocks is arranged, the productivity is low, the cost is high, and the cost is high.
Further, the conventional camera is used as a moving image camera, and is suitable for use while diagnosing while watching a monitor image in real time, but still images required for remote skin diagnosis are taken in both the texture mode and the stain mode. Operation was troublesome.
Further, almost no scheme has been proposed for a field sequential color camera having a set of light emitting elements having red, green, and blue emission colors or a set of red, green, blue, infrared, and ultraviolet light emitting elements. .
Further, in the conventional camera, the light emitting elements are arranged in an annular shape symmetrical with respect to the optical axis. Therefore, the light distribution characteristics include factors such as the directivity of the light emitting element, the diameter of the annular arrangement, and the distance between the subject and the light emitting element. The adjustment was difficult.
Therefore, in the present invention, the light-emitting elements are arranged in a two-sided structure separated in the vertical direction of the optical axis, arranged in a horizontal row, and two types of rectangular shapes which are easy to process a polarizing plate for switching the illumination mode are required. In order to greatly reduce manufacturing costs and facilitate still image shooting for remote skin diagnosis, a frame switching illumination control circuit that can obtain both texture mode and stain mode images with a single shutter operation is provided. An object of the present invention is to individually adjust currents of light emitting elements to have a function of adjusting light distribution characteristics of an illumination system.
[0011]
According to the present invention, there is provided a skin photographing television camera apparatus, wherein a lens is disposed inside the case so as to face a photographing window opened in front of the case body, and light is incident through the lens. It is composed of an image pickup element for picking up an optical image and an illumination mechanism for illuminating a subject in contact with the outside of the imaging window from inside the case.
The illumination mechanism includes a plurality of light-emitting elements arranged as light-emitting element rows in a horizontal row on two surfaces separated above and below the optical axis, respectively. The light-emitting element rows on the side away from the optical axis form two blocks each having a different function, and these two blocks can emit light independently.
One polarizing plate that transmits light in a constant vibration direction is provided on the light emitting surface side of the light emitting element row block on the optical axis side and on the optical path of the reflected light from the subject to the image sensor, and the light emitted on the side away from the optical axis is provided. The light emitting surface side of the element row block has a structure in which two upper and lower second polarizing plates that transmit light in a vibration direction orthogonal to the polarizing plate are provided. Is possible.
Further, a lighting control circuit that includes a still image photographing shutter switch, switches the driving current of the light emitting element array block every frame or every several frames in synchronization with the frame period, and switches between the texture mode and the stain mode, performs one operation. Simultaneous imaging of still images in two illumination modes is realized by operation.
A high-resolution color imaging or an illumination mechanism for field-sequential imaging that enables high-resolution color imaging and ultraviolet light and infrared light imaging with one image sensor is also realized.
Further, a drive current adjustment circuit is provided for each light emitting element, so that the light distribution characteristics can be adjusted flat in the imaging range of the subject.
According to the first aspect of the present invention, the skin photographing television camera device can switch between the texture mode and the stain mode by using two kinds of polarizing plates whose vibration directions are orthogonal to the illumination of two surfaces separated above and below the optical axis. Features a structure.
According to a second aspect of the present invention, there is provided a skin photographing television camera apparatus which switches a drive current of a light emitting element array block in one frame or several frames in synchronization with a frame period by an electric signal sent from a still image photographing shutter switch. Is characterized by the following structure.
According to a third aspect of the present invention, there is provided a television camera apparatus for photographing a skin, wherein a color sequential camera is provided by a set of light-emitting elements having red, green, and blue light-emitting colors, or ultraviolet light and red light for three primary colors, red, green and blue. It is characterized by having an illumination mechanism for realizing a high-performance surface-sequential color camera by adding infrared light.
In a fourth aspect of the present invention, the skin photographing television camera apparatus uses a white light emitting element and red, green, and blue band-pass filters instead of the light emitting elements having the red, green, and blue emission colors of the third aspect. Features a structure.
According to a fifth aspect of the present invention, there is provided the skin photographing television camera apparatus, wherein the illumination of red, green, blue or red, green, blue, infrared light, or ultraviolet light according to the third or fourth aspect is performed for each frame period. A lighting control circuit for sequentially lighting is used.
[0016] The skin photographing television camera device according to claim 6 is characterized in that a set of a light emitting element group on the upper and lower surfaces of the optical axis and a corresponding polarizing plate is provided on only one upper surface. It can be put to practical use in applications where the accuracy of light distribution characteristics is not required.
According to a seventh aspect of the present invention, there is provided a skin photographing television camera apparatus including a current adjusting circuit for each light emitting element, and a light distribution characteristic control circuit capable of adjusting a light distribution characteristic to be flat within an imaging range of a subject. It is characterized by the following.
[0019]
Embodiments of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is an explanatory view showing the structure of the optical system of the television camera apparatus for photographing skin according to the present invention. The case 1 is provided with an open photographing window 2, and a subject 8 such as skin is in contact with the photographing window 2. An image of the subject 8 is formed on the imaging device 4 via the lens 3 and is converted into a television signal. For illumination of the subject, a plurality of light emitting elements 6 are mounted on the illumination board 5 and arranged in two areas separated above and below the optical axis, and are illuminated from inside. The composite polarizing plate 7 is disposed immediately before the light emitting element 6.
FIG. 2 is a plan view showing the structure of the lighting board 5. The center of the substrate 9 coincides with the center of the optical axis, and an opening 9 is provided to allow the reflected light from the subject to pass. A plurality of light emitting elements 6 indicated by small circles in the figure are arranged in areas separated vertically and form a horizontal row. In this light-emitting element array, the light-emitting element arrays 11 and 12 near the optical axis form one block, and the light-emitting element arrays 10 and 13 on the side remote from the optical axis form another block. Are connected so that they can be turned on or off independently in block units.
FIG. 3 is a plan view showing the structure of the composite polarizing plate 7. The polarizing plate 15 transmits light having a horizontal vibration direction, and the polarizing plates 14 and 16 transmit light having a vertical vibration direction. The polarizing plate 15 is arranged so as to cover the light emitting element rows 11 and 12 on the optical axis side in FIG. The polarizing plate 14 is arranged so as to cover the light emitting element array 10 of FIG. 2, and the polarizing plate 16 is arranged so as to cover the front surface of the light emitting element array 13. Note that the polarizing plate 15 and the polarizing plates 14 and 16 need only have their vibration directions orthogonal to each other, and the polarizing plate 15 may be vertical and the polarizing plates 14 and 16 may be horizontal.
FIG. 4 is a plan view showing the structure of the illumination board 5 according to the third and fourth aspects. The light emitting device shown in FIG. 2 is replaced with a set of light emitting devices having three primary colors of red, green and blue. The light-emitting element arrays 18 and 19 on the optical axis form one block, and the light-emitting element arrays 17 and 20 on the side remote from the optical axis form another block, and the two blocks are independently block units. It is connected so that it can be turned on or off. At the same time, the light emitting elements of the three primary colors of red, green, and blue are connected so as to be sequentially driven for the same light emitting color.
FIG. 5 is a layout diagram showing a structure of a set of light emitting elements having three primary colors of red, green and blue. A red light emitting element 22, a green light emitting element 23, and a blue light emitting element 24 form a group.
FIG. 6 shows an example of an arrangement in which a set of light emitting elements is composed of five kinds of emission colors of red, green, blue, ultraviolet and infrared.
FIGS. 7, 8 and 9 are diagrams for explaining the contents described in claim 6, and show a structure in which the light emitting element group and the corresponding polarizing plate are both arranged on only one upper surface. .
FIG. 10 is a timing chart showing the operation of the lighting control of the second aspect.
FIG. 11 is a timing chart for driving a light emitting element having a red, green, blue or red, green, blue, ultraviolet, or infrared light emission color according to the third or fourth aspect.
FIG. 12 is a block diagram of a television camera device for photographing skin.
FIG. 13 shows a high-performance color camera of the field sequential type using a light emitting element having a red, green, blue or red, green, blue, ultraviolet, or infrared light emitting color according to the third or fourth aspect. It is a wavelength spectrum diagram.
The above is an example of the configuration of the present invention, and its operation will be described below.
In the optical system shown in FIGS. 1, 2 and 3, light emitted from the light emitting element rows 11 and 12 on the optical axis side passes through the polarizing plate 15 and becomes polarized light having a horizontal vibration direction and is irradiated on the subject 8. You. The light reflected on the surface keeps the polarization, but passes through the polarizing plate 15 having the same vibration direction, passes through the lens 3, and forms an image on the image sensor 4. On the other hand, light emitted from the light emitting element arrays 10 and 13 on the side away from the optical axis passes through the polarizers 14 and 16 to become polarized light having a vertical vibration direction and is irradiated on the subject 8, but the surface reflected light is Since the polarized light in the vertical vibration direction is maintained, the polarized light is blocked by the horizontal polarizing plate 15 and does not reach the image sensor. The light reflected after entering the skin passes through the polarizing plate 15 and reaches the image sensor 4.
Therefore, when the light emitting element arrays 11 and 12 on the optical axis side emit light, a texture mode is an illumination mode utilizing surface reflected light, and when the light emitting element arrays 10 and 13 on the side away from the optical axis are turned on, surface reflected light is emitted. Becomes the stain mode in which is removed.
FIGS. 7, 8, and 9 show a structure in which only the upper surface of FIGS. 1, 2, and 3 of the two-surface structure is used, and the lower surface is omitted. Therefore, the basic operation is the same as that of the two-sided structure.
FIG. 10 is a timing chart showing the operation of the lighting control circuit according to the second embodiment. When a shutter pulse 30 for photographing a still image is input, the light emitting element array on the optical axis is turned on in synchronization with the frame period. Then, illumination light 31 is generated. As a result, the electric charges 33 are accumulated in the image sensor and read out to form a video signal 35.
Subsequently, the light emitting element row on the side distant from the optical axis is turned on, and the same operation is performed.
FIG. 11 is a timing chart in the case of operating as a light emitting element set of red, green and blue light emitting colors according to the third and fourth aspects. When the still image capturing shutter pulse 30 is input, the blue illumination light emitting element 24 shown in FIG. 5 is turned on in synchronization with the frame period, and the blue illumination output 37 is generated for one frame period. Next, the green illumination light emitting element 23 is turned on, and a green illumination output 38 is generated. Finally, the red illumination light emitting element 22 is turned on, and a red illumination output 39 is generated. As described above, the blue illumination, the green illumination, and the red illumination are sequentially turned on to illuminate the subject, and an image of the subject is formed on the image sensor 4 through the lens 3. A blue video signal 43, a green video signal 44, and a red video signal 45 corresponding to blue illumination, green illumination, and red illumination are sequentially output from the image sensor. These video signals are written into the image memory 55 shown in FIG. 12, and then the blue, green, and red video signals are simultaneously read out, become three primary color video signals, and sent to the image display circuit 56. It is formed into a television signal and output.
In the case of red, green, blue, ultraviolet, infrared, the same operation as the case of the red, green, blue light emitting element group described above is performed, and ultraviolet, infrared is added to red, green, blue. Shape. In this case, red, green, blue, ultraviolet, and infrared video signals are generated.
The above-described sequential imaging cycle of red, green, and blue or the sequential imaging cycle of red, green, blue, ultraviolet, and infrared is performed once for each of the texture mode and the stain mode.
FIG. 13A is a spectrum diagram in the case where red, green, and blue light emitting diodes are used as light emitting elements. FIG. 13B is a spectrum diagram when a white light emitting diode is used as a light emitting element and the white light emitting diode is combined with a band pass filter. FIG. 13C is a spectrum diagram in the case where ultraviolet and infrared light emitting diodes are further combined. As described above, the ordinary camera separates colors on the imaging side, whereas the invention according to claim 3 or 4 provides an optical system for separating colors on the illumination side.
FIG. 12 is a circuit block diagram. When a shutter pulse for photographing a still image is input from the terminal 59, it is sent to the illumination driving circuit 51 via the MPU 58 to perform the above-described illumination driving operation.
As described above, the present invention has a simple structure with excellent productivity compared to the conventional annular lighting structure, and makes it possible to reduce the manufacturing cost. In addition, an illumination control circuit for switching a frame period for photographing a still image necessary for remote diagnosis is provided, so that a single operation of the shutter switch enables high-speed imaging in the texture mode and the spot mode.
Furthermore, in the configuration using a set of red, green, blue or red, green, blue, ultraviolet, and infrared light emitting elements, a high-performance plane-sequential color camera that achieves high image quality or an ultraviolet and infrared light added to the camera By realizing the optical system of a frame sequential color camera, high performance can be obtained as a skin photographing camera. Ultraviolet light is suitable for accurate observation of the surface shape of the skin, and infrared light is suitable for observation of the inside of the skin such as spots, and can be expected to provide advanced diagnostic effects that cannot be obtained with visible light alone in addition to color images.
Generally, it is difficult to adjust the light distribution characteristics when the shooting area of the subject is relatively large.However, the present invention has a circuit that adjusts the drive current for each light emitting element, realizing flat light distribution characteristics even when the shooting area is large. can do.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an optical system structure of the present invention.
FIG. 2 is a plan view of a lighting board on which a light emitting element is mounted.
FIG. 3 is a plan view showing a structure of a composite polarizing plate.
FIG. 4 is a plan view showing a structure of a lighting board according to the third and fourth aspects.
FIG. 5 is a layout view showing a structure of a set of light emitting elements having three primary colors of red, green and blue.
FIG. 6 is an arrangement diagram in the case where a set of light-emitting elements is constituted by five kinds of emission colors of red, green, blue, ultraviolet, and infrared.
FIG. 7 is an explanatory diagram showing an optical system structure in the case of one upper surface.
FIG. 8 is a plan view of the illumination board in the case of one upper surface.
FIG. 9 is a plan view showing the structure of the composite polarizing plate in the case of one upper surface.
FIG. 10 is a timing chart showing the operation of the lighting control of claim 2;
FIG. 11 is a timing chart for driving a light-emitting element having a red, green, blue or red, green, blue, ultraviolet, or infrared light emission color according to claim 3 or 4;
FIG. 12 is a block diagram of a television camera device for photographing skin.
FIG. 13 is a wavelength spectrum diagram showing the operation of claim 3 or claim 4.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 The case of the optical system of the television camera apparatus for skin imaging 2 The imaging window 3 The lens 4 The imaging element 5 The lighting board 6 The light emitting element 7 The composite polarizing plate 8 Subject (skin)
9 opening 10 light emitting element row 11 light emitting element row 12 light emitting element row 13 light emitting element row 14 vertical polarizing plate 15 horizontal polarizing plate 16 vertical polarizing plate 17 row of light emitting element set 18 row of light emitting element set 19 light emitting element set Row 20 of light emitting element set 21 light emitting element set 22 red light emitting element 23 green light emitting element 24 blue light emitting element 25 red light emitting element 26 green light emitting element 27 blue light emitting element 28 ultraviolet light emitting element 29 infrared light emitting element

Claims (7)

ケース本体の前方に開設された撮影窓に対向してケース内部に配置されたレンズ、及びこのレンズを介して入射した光学像を撮像する撮像素子と、前記ケース内部に設けられており、前記撮影窓に接した被写体を内部から照明する複数の発光素子が配置されている撮像機構において、複数の発光素子は光軸の上下に分離された二つの面上にそれぞれ水平列状に配設されており、前記上下2面上の発光素子のうち光軸側にある発光素子列と光軸から離れた側の発光素子列は二つのブロックをなし、かつ二つのブロックは独立に発光可能になされたものであって、光軸側にある発光素子列ブロックの発光面側および被写体から撮像素子に向かう反射光の光路上に一定振動方向の光を透過する第一の偏光板を設け、光軸から離れた側の発光素子列ブロックの発光面側には前記偏光板とは直交する振動方向の光を透過する第二の偏光板を備えたことを特徴とする肌撮影用テレビカメラ装置。A lens disposed inside the case in opposition to a photographing window opened in front of the case body, and an imaging element for capturing an optical image incident through the lens; and In an imaging mechanism in which a plurality of light-emitting elements for illuminating a subject in contact with a window from the inside are arranged, the plurality of light-emitting elements are respectively arranged in a horizontal row on two surfaces separated above and below the optical axis. The light emitting element row on the optical axis side and the light emitting element row on the side away from the optical axis among the light emitting elements on the upper and lower two surfaces form two blocks, and the two blocks can emit light independently. And a first polarizing plate that transmits light in a constant vibration direction on the light emitting surface side of the light emitting element row block on the optical axis side and on the optical path of the reflected light from the subject to the imaging element, from the optical axis. Light emitting element row Click on the light emitting surface side the polarizing plate skin photographing TV camera apparatus characterized by comprising a second polarizer for transmitting light in the oscillation direction perpendicular to the in. 静止画撮影用シャッタースイッチを備え、静止画撮影用シャッタースイッチに連動して、光軸側にある発光素子列ブロックと光軸から離れた側の発光素子列ブロックをフレーム期間に同期して順次点灯する点灯制御回路を備えたことを特徴とする請求項1記載の肌撮影用テレビカメラ装置。Equipped with a still image shooting shutter switch, and in conjunction with the still image shooting shutter switch, the light emitting element array block on the optical axis side and the light emitting element array block on the side away from the optical axis are sequentially turned on in synchronization with the frame period The television camera apparatus for photographing skin according to claim 1, further comprising a lighting control circuit for turning on the skin. 各々の発光素子を赤、緑、青の発光色を有する発光素子の組、または赤、緑、青、赤外光、紫外光の発光色を有する発光素子の組によって置換した構造を有する請求項1または請求項2記載の肌撮影用テレビカメラ装置。A structure in which each light-emitting element is replaced by a set of light-emitting elements having red, green, and blue emission colors, or a set of light-emitting elements having red, green, blue, infrared, and ultraviolet light emission colors. The skin photographing television camera device according to claim 1. 赤、緑、青の発光色を有する発光素子を、白色発光素子と赤、緑、青の各帯域通過フィルタの組み合わせによって、代替したことを特徴とする請求項3記載の肌撮影用テレビカメラ装置。4. The skin camera according to claim 3, wherein the light-emitting elements having red, green, and blue emission colors are replaced by a combination of a white light-emitting element and red, green, and blue band-pass filters. . 静止画撮影用シャッタースイッチを備え、静止画撮影用シャッタースイッチに連動して、赤、緑、青の発光色を有する発光素子の組または赤、緑、青、赤外光、紫外光の発光素子の組をそれぞれフレーム期間毎に順次点灯する点灯制御回路を設けたことを特徴とする請求項3または請求項4記載の肌撮影用テレビカメラ装置。Equipped with a shutter switch for shooting still images, and in combination with the shutter switch for shooting still images, a set of light emitting elements having red, green, and blue emission colors or light emitting elements for red, green, blue, infrared light, and ultraviolet light. 5. The television camera device for skin photographing according to claim 3, further comprising a lighting control circuit for sequentially lighting each set of the sets for each frame period. 複数の発光素子と当該発光素子の前面に配置された偏光板の組が、光軸の上側1面だけに用いられ、下側は省略された機構を特徴とする請求項1、請求項2、請求項3、請求項4または請求項5記載の肌撮影用テレビカメラ装置。3. A mechanism in which a set of a plurality of light emitting elements and a polarizing plate disposed on the front surface of the light emitting elements is used only on one upper surface of the optical axis and the lower side is omitted. The television camera apparatus for photographing skin according to claim 3, 4, or 5. 発光素子1個毎に、あるいは複数個まとめた単位毎に、配光特性を調整するための駆動電流調整回路を設けたことを特徴とする請求項1、請求項2、請求項3、請求項4、請求項5または請求項6記載の肌撮影用テレビカメラ装置。3. A driving current adjusting circuit for adjusting a light distribution characteristic for each light emitting element or for each unit of a plurality of light emitting elements. The television camera apparatus for photographing skin according to claim 4, claim 5, or claim 6.
JP2002382756A 2002-11-29 2002-11-29 Television camera apparatus for photographing skin Withdrawn JP2004187248A (en)

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Cited By (12)

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JP2006087748A (en) * 2004-09-24 2006-04-06 Kao Corp Instrument for measuring optical property of skin
WO2006049192A1 (en) * 2004-11-05 2006-05-11 Ya-Man Ltd. Skin treatment apparatus
JP2010167286A (en) * 2010-03-11 2010-08-05 Kao Corp Instrument for measuring optical property of skin
JP2010237091A (en) * 2009-03-31 2010-10-21 Hokuriku Electric Power Co Inc:The Alkali-silica reaction determination apparatus
JP2012234081A (en) * 2011-05-06 2012-11-29 Oputeikon:Kk Illumination device and optical device
JP2013026846A (en) * 2011-07-21 2013-02-04 Nidec Copal Corp Skin observation device
JP2013538601A (en) * 2010-08-13 2013-10-17 ユニリーバー・ナームローゼ・ベンノートシヤープ Camera device for diagnosing skin or hair condition
JP2015029168A (en) * 2013-07-30 2015-02-12 パナソニック株式会社 Electronic mirror device
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KR20150094751A (en) * 2012-12-27 2015-08-19 히다치 막셀 가부시키가이샤 Lens module and portable photography device
US9326685B2 (en) 2012-09-14 2016-05-03 Conopco, Inc. Device for evaluating condition of skin or hair
KR102203166B1 (en) * 2020-08-27 2021-01-14 주식회사 지원파트너스 Equipment capable of plasma irradiation and skin condition measurement

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4517800B2 (en) * 2004-09-24 2010-08-04 花王株式会社 Measuring device for optical properties of skin
JP2006087748A (en) * 2004-09-24 2006-04-06 Kao Corp Instrument for measuring optical property of skin
WO2006049192A1 (en) * 2004-11-05 2006-05-11 Ya-Man Ltd. Skin treatment apparatus
JP2010237091A (en) * 2009-03-31 2010-10-21 Hokuriku Electric Power Co Inc:The Alkali-silica reaction determination apparatus
JP2010167286A (en) * 2010-03-11 2010-08-05 Kao Corp Instrument for measuring optical property of skin
JP2013538601A (en) * 2010-08-13 2013-10-17 ユニリーバー・ナームローゼ・ベンノートシヤープ Camera device for diagnosing skin or hair condition
JP2012234081A (en) * 2011-05-06 2012-11-29 Oputeikon:Kk Illumination device and optical device
JP2013026846A (en) * 2011-07-21 2013-02-04 Nidec Copal Corp Skin observation device
US9326685B2 (en) 2012-09-14 2016-05-03 Conopco, Inc. Device for evaluating condition of skin or hair
KR20150094751A (en) * 2012-12-27 2015-08-19 히다치 막셀 가부시키가이샤 Lens module and portable photography device
KR102010995B1 (en) * 2012-12-27 2019-08-14 맥셀 홀딩스 가부시키가이샤 Lens module and portable photography device
JP2015029168A (en) * 2013-07-30 2015-02-12 パナソニック株式会社 Electronic mirror device
JP2015046698A (en) * 2013-08-27 2015-03-12 ソニー株式会社 Imaging apparatus and its imaging method, image processing system and its image processing method, and program
KR102203166B1 (en) * 2020-08-27 2021-01-14 주식회사 지원파트너스 Equipment capable of plasma irradiation and skin condition measurement

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