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JP4476406B2 - Stereo microscope - Google Patents
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JP4476406B2 - Stereo microscope - Google Patents

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Publication number
JP4476406B2
JP4476406B2 JP2000009463A JP2000009463A JP4476406B2 JP 4476406 B2 JP4476406 B2 JP 4476406B2 JP 2000009463 A JP2000009463 A JP 2000009463A JP 2000009463 A JP2000009463 A JP 2000009463A JP 4476406 B2 JP4476406 B2 JP 4476406B2
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observation
eye
color temperature
mode
illumination
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JP2001198088A (en
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充晃 和田
正喜 大野
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Topcon Corp
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Topcon Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/13Ophthalmic microscopes

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
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  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eye Examination Apparatus (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、実体顕微鏡に関し、詳しくは、見易い眼底像等を観察することができ、被検眼の眼底観察、眼底治療を容易にすることができる細隙灯顕微鏡、手術用顕微鏡等のような実体顕微鏡に関する。
【0002】
【従来の技術】
例えば、細隙灯顕微鏡のような実体顕微鏡により被検眼の眼底観察を行う際や、眼底に対して光凝固等の治療を行う際に、コンタクトレンズ又は前置レンズが用いられる。被検眼の眼底像を両眼視しようとすれば、このとき観察視野内にコンタクトケンズ又は前置レンズによる反射光が入ってくる。これを避けるためには観察光軸と照明光軸との角度を大きくしなければならず、この結果、被検眼の両眼視ができなくなる。従って、必然的に観察光軸と照明光軸との角度を小さくする必要がある。
【0003】
また、被検眼の眼底の光凝固を行う場合には、細隙光(スリット光)の幅を被検眼の乳頭の大きさの3倍程度に設定して使用するのが通常であるため、コンタクトレンズ内の空気と接した面からの反射を逃すために照明系の光軸を振る角度はさほど大きくはならない。
【0004】
しかし、光凝固を行う眼底の箇所を変更する場合には、コンタクトレンズの位置も変更しなければならず、この際にコンタクトレンズからの反射光が細隙光で照明された眼底像の中に入ってしまう。
【0005】
そこで、観察光軸に対して照明光軸を振り、反射を逃さなければならず、被検眼の眼底観察、眼底治療の妨げとなっていた。
【0006】
一方、眼底のみを観察する場合、観察範囲が広く、照明光軸を広範囲に振る必要があり、このため、照明系が観察系の一部を塞いでしまい、眼底の両眼視は困難となる。
【0007】
その対策として、例えば前置レンズとしてイエロー(黄色)型のものが使用される。イエロー型の前置レンズを使用すると、前置レンズからの反射光が観察視野内に入っていてもかなり弱く見え、照明光軸と観察光軸との角度がかなり小さく、眼底の両眼視をある程度実現できる。また、患者の網膜に対する刺激も弱く網膜保護の点で効果がある。
【0008】
しかし、この場合には、眼底像の黄色味が増えてしまうという問題がある。
【0009】
ところで、被検眼の眼底観察、眼底治療を目的とする実体顕微鏡の場合、照明系の光源は主にハロゲン電球が使用される。ハロゲン電球よる照明光は、色温度が高く、被検眼の前眼部観察には適している。
【0010】
しかし、被検眼の眼底観察、眼底治療を行う場合には、照明光の色温度が高すぎ眼底像が白っぽく見えてしまい、フレアー成分も強く良好な眼底像を観察し又は観察しつつ治療を行うことができない。
【0011】
尚、照明系の光源として例えばハロゲン電球により色温度が低いタングステン電球を使用することで、照明光は暖色系となり被検眼の眼底像を良好に観察し得ることが知られている。
【0012】
【発明が解決しようとする課題】
上述したように、照明系の光源としてハロゲン電球を使用している実体顕微鏡の場合、被検眼の前眼部等の観察には適するものの被検眼の眼底観察を行う場合には、照明光の色温度が高すぎて不適当であるという問題があった。
【0013】
そこで、本発明は、高い色温度の照明光照射による被検眼の角膜、水晶体等の前眼部やこの他の眼底以外の部位の観察機能を損なうことなく、眼底観察も良好に行うことが可能な実体顕微鏡を提供するものである。
【0016】
【課題を解決するための手段】
請求項記載の発明は、被検眼にハロゲン電球からなる光源が出射する照明光を照射する照明系と、この照明系により照明される被検眼の像を観察する観察系とを有する実体顕微鏡において、前記照明系の光路又は観察系の光路のいずれかに挿脱可能に備えた照明光又は観察光の色温度を変換する色温度変換素子と、前記被検眼に対する観察モードを、前眼部観察モードと眼内観察モードとに切り換えるモード切替手段と、モード切替手段により眼内観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路のいずれかに挿入し、前眼部観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路から離脱させる変換素子駆動手段とを有することを特徴とするものである。
【0017】
この発明によれば、モード切替手段により、眼内観察モードに切り換えた時、変換素子駆動手段により前記色温度変換素子を前記照明系の光路又は観察系の光路のいずれかに挿入し、また、前眼部観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路から離脱させるものであるから、ハロゲン電球からなる光源による高い色温度の照明光照射による被検眼の前眼部観察機能を損なうことなく、しかも、被検眼の前眼部以外の眼内観察、例えば眼底観察等を行う場合には色温度変換素子により色温度を変換した状態での観察像を見ることが可能となり、前眼部観察、眼底観察等を各々良好に行うことができる。
【0018】
請求項記載の発明は、被検眼にハロゲン電球からなる光源が出射する照明光を照射する照明系と、この照明系により照明される被検眼の像を観察する観察系とを有する実体顕微鏡において、前記被検眼に対する観察モードを、前眼部観察モードと眼内観察モードとに切り換えるモード切替手段と、モード切替手段による眼内観察モード、前眼部観察モードへの切り替えに応じて、前記ハロゲン電球からなる光源の電圧を変更し、被検眼の眼内に対する照明光、前眼部に対する照明光の各照度の最適化を行う光源電圧制御手段とを有することを特徴とするものである
【0019】
この発明によれば、モード切替手段による前眼部観察モードと眼内観察モードとの切り替えに応じて、光源電圧制御手段がハロゲン電球からなる光源の電圧を変更し、被検眼の眼内に対する照明光、前眼部に対する照明光の各照度の最適化を行うものであるから、前眼部像の観察時、眼底等の眼内像の観察時に各々最適の画像を見ることができ、前眼部観察、眼底観察等を各々良好に行うことができる。
【0020】
請求項記載の発明は、被検眼にハロゲン電球からなる光源が出射する照明光を照射する照明系と、この照明系により照明される被検眼の像を観察する観察系とを有する実体顕微鏡において、前記照明系の光路又は観察系の光路のいずれかに挿脱可能に備えた照明光又は観察光の色温度を変換する色温度変換素子と、前記被検眼に対する観察モードを、前眼部観察モードと眼内観察モードとに切り換えるモード切替手段と、モード切替手段により眼内観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路のいずれかに挿入し、前眼部観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路から離脱させる変換素子駆動手段と、前記モード切替手段による眼内観察モード、前眼部観察モードへの切り替えに連動して、前記ハロゲン電球からなる光源の電圧を変更し、被検眼の眼内に対する照明光、前眼部に対する照明光の各照度の最適化を行う光源電圧制御手段とを有することを特徴とするものである。
【0021】
この発明によれば、請求項2、3記載の発明を組み合わせた構成で、特に眼底等の眼内像の観察時に、色温度変換素子による色温度変換と、光源電圧制御手段による被検眼の眼内に対する照明光の照度変換との相乗作用でより一層良好な眼底観察等を行うことができる。
【0022】
【発明の実施の形態】
以下に、本発明の実施の形態を説明する。
【0023】
(実施の形態1)
図1に示す本実施の形態1の実体顕微鏡1は、テーブル2上に移動機構部3を介して水平横方向及び水平縦方向に移動可能に支持された基台4と、傾倒操作により基台4を水平横方向及び水平縦方向に変位させる操作ハンドル5と、前記基台4により各々支持された観察系6、光源や鏡筒本体に対峙して配置する細隙を有する照明系8と、観察系6の対物レンズを収納した鏡筒本体9に対峙させた被検者用の顎受部10a、額当て10bを有する顎受け台10とを具備している。前記鏡筒本体9の側面には、観察倍率変倍用の回転軸を突設し、この回転軸に対して外周に観察系6の観察倍率を示す6,10,16,25,40等の数字を付した操作ノブ11を装着するようになっている。
【0024】
図2、図3は、本実施の形態の実体顕微鏡1の光学構成の概略を示すものであり、この細隙灯顕微鏡1は、鏡筒本体9に収納した観察系6と、鏡筒本体9に取り付けた撮像装置20と、観察系6に対し、被検眼Eに対峙させるミラー12に関して直交配置とした照明系8とを有している。
【0025】
前記観察系6は、ミラー12と、対物レンズ31と、変倍光学系32と、ビームスプリッタ34と、リレーレンズ35と、光路を接眼鏡筒9a側に変更するプリズム36と、接眼鏡筒9aに配置した接眼レンズ37とを具備し、被検眼Eの像(図7に示す前眼部像、図8に示す眼底像等)を図2に示す結像点Pに結像し検者眼E0 により観察可能とするようになっている。
【0026】
前記撮像装置20は、前記ビームスプリッタ34により分岐される光束を集光する集光レンズ41と、この集光レンズ41からの光束を90度直角に曲げるミラー42と、撮像カメラ43とを具備している。
【0027】
観察系6は、図3に示すように、検者眼E0 による立体視が可能なように2系統の構成となっている。
【0028】
前記照明系8は、図2に示すように、ハロゲンランプからなる光源51と、この光源51からの光を集光する集光レンズ52及び53と、この集光レンズ52及び53を通過した光の一部のみを通過させる視野絞り54と、視野絞り54を通過した光を投影する投影レンズ55と、前記光源51と集光レンズ52との間に配置したキセノンランプ等のストロボ光源56とを具備している。
【0029】
前記視野絞り54と被検眼Eとは、投影レンズ55に対して共役の位置になるように配置され、これにより、前記ミラー12を介して被検眼Eの例えば角膜に対し、図6に示すように、局所的な照明光(以下「スリット光」という)を照射し、被検眼Eの角膜断面(図6に斜線を付して示す)Edに対応する前眼部像Ed´を観察可能としている。
【0030】
本実施の形態1の実体顕微鏡1は、さらに、図2、図3に示すように、変倍光学系32と集光レンズ33との間に、観察光の色温度を変換する色温度変換素子61を色温度変換素子駆動手段である電磁ソレノイド65の動作で挿脱可能に配置している。
【0031】
色温度変換素子61は、図4に示すように、基板62に2個の色温度変換フィルター63を所定の間隔(中心間隔が照明系6の両眼用の光軸間距離Lと一致する間隔)で配置した構成となっている。
【0032】
色温度変換素子61の代わりに、図4に示すように、回転円板64に前記光軸間距離Lに相当する間隔で2個の色温度変換フィルター66を180度配置で設けるとともに、この2個の色温度変換フィルター66と各々90度ずらした位置に2個の抜穴67を設けた色温度変換素子61Aとし、この色温度変換素子61Aを図示しない回転駆動手段で回転駆動して、2個の色温度変換フィルター66を照明系6の両眼用の光軸に挿入したり(眼内モード時)、2個の抜穴67を照明系6の両眼用の光軸に挿入する(前眼部モード時)構成とすることもできる。
【0033】
図9は、実体顕微鏡1の制御系の主要部を示すものであり、前記光源51の点灯駆動、駆動電圧の電圧制御を行う光源電圧制御手段として機能するとともに、ストロボ光源55等の点灯制御を含むこの実態顕微鏡1全体の制御を行う制御部81と、前記撮像カメラ43と、実体顕微鏡1全体の動作に必要な電力を供給する電源部85と、前記制御部81に操作信号を供給する操作スイッチ86とを有し、さらに、撮像カメラ43からの画像信号を取り込む画像制御部82と、この画像制御部82に接続した液晶ディスプレイ等の画像モニタ83と、画像制御部82に接続した記憶手段である画像メモリ84とを付加している。前記画像制御部82、画像モニタ83及び画像メモリ84は実体顕微鏡1と別体の画像処理装置として構成している。
【0034】
前記操作スイッチ86には、被検眼Eに対する観察モードを前眼部モードとする前眼部キー91と、被検眼Eに対する観察モードを眼内モードとする眼内キー92とを有している。尚、前眼部モードとは被検眼Eの角膜、虹彩、水晶体等を観察するモードをいい、また、眼内モードとは被検眼Eの眼底、硝子体等を観察するモードを言うものとして以下の説明を行う。
【0035】
次に、上述した本実施の形態1の実体顕微鏡1の作用を説明する。
【0036】
この実体顕微鏡1において、前記前眼部キー91を操作して、前眼部モードに設定した場合、前記制御部81の制御の基に電磁ソレノイド65は不動作状態を維持し、色温度変換素子61の色温度変換フィルター63は照明系6の光路に挿入されない離脱状態とする。
【0037】
また、前記ハロゲン電球からなる光源51から発光した光は集光レンズ52を介して視野絞り54を通過する。視野絞り54と被検眼Eとは共役に配置されているので、視野絞り54を通過して形成されたスリット光は投影レンズ55、ミラー12を経て図6に示すように被検眼Eの前眼部(角膜断面:図6に斜線を付して示す)Edに照射される。
【0038】
このようにして、被検眼Eに照射され、被検眼Eの角膜断面Edで反射した光及び被検眼Eの全体で反射した光束は、高い色温度の状態で観察系6の対物レンズ31に通過し、さらに、ビームスプリッタ34を経てその一部が図2に示す結像点Pに結像し、検者眼E0 により前眼部像Ed´として明確に観察されることになる。
【0039】
また、ビームスプリッタ34により分岐される光束は、前記ミラー42を経て撮像カメラ43に入射し、これにより、検者眼E0 の観察像と同一の観察像が撮像カメラ43により撮像され、前記画像制御部82の制御の基に画像モニタ83に送られて図7に示すように前眼部像Ed´として表示される。
【0040】
一方、前記眼内キー92を操作して、眼内モードに設定した場合、前記制御部81の制御の基に電磁ソレノイド65が動作し、色温度変換素子61の色温度変換フィルター63を照明系6の光路に挿入する。
【0041】
これにより、上述した場合と同様な経路で被検眼Eの眼底Efに照明光が照射され、眼底Efからの反射光は観察系6の対物レンズ31に通過し、さらに、変倍光学系32、色温度変換フィルター63、ビームスプリッタ34を経てその一部が図2に示す結像点Pに色温度が変換され、暖色系の見易い眼底像Ef´として結像し、検者眼E0 により観察される。
【0042】
また、画像モニタ83に送られて図8に示すように眼底像Ef´として表示される。
【0043】
このようにして、本実施の形態1によれば、被検眼Eの前眼部観察、眼底観察等を各々良好な状態で行うことができる。
【0044】
図10は、本実施の形態1の変形例を示すものであり、図2に示す場合に変えて、照明系8の視野絞り54と投影レンズ55との間に照明光の色温度を変換する色温度変換素子61を色温度変換素子駆動手段である電磁ソレノイド65の動作で挿脱可能に配置したことが特徴である。
【0045】
色温度変換フィルター63を照明系8の光路に入れた場合について考察すると眼底Efでの色温度をK1 、色温度変換素子61を照明系8に入れた場合の眼底Efでの色温度をK2 、色温度変換素子61の色温度変換能力(ミレッド値)をaとすれば、眼底Efでの色温度K2 は下記数1で表すことができる。
【0046】
【数1】

Figure 0004476406
例えば、眼底Efでの色温度変換素子61を入れない場合の色温度K1 =3300K、色温度変換能力a=40とすれば、色温度変換素子61を入れた場合の眼底Ef´の色温度K2 =2915Kとなる。
【0047】
また、眼底Efでの色温度変換素子61を入れない場合の色温度K1 =3800K、色温度変換能力a=40とすれば、色温度変換素子61を入れた場合の眼底Efでの色温度K2 =3299Kとなる。
【0048】
このよう色温度をもった眼底Efの眼底像Ef´は依然として青白く観察される。また、物体面(眼底Ef面)での好ましい色温度は、2500K乃至2900K程度であることが知られている。
【0049】
本実施の形態1では、物体面(眼底Ef面)での色温度が2500K乃至2900K程度になるような色温度変換能力aをもった色温度変換素子61を選定するものである。
【0050】
(実施の形態2)
次に、本発明の実施の形態2の実体顕微鏡1について図9、図11、図12、図13を参照してを説明する。図11は、一般的な12V、30Wのハロゲン電球からなる光源51の電圧−光束特性を示すものである。また、図13は、12V、30Wのハロゲン電球の波長と分光放射輝度の変化との関係を示す特性図である。
【0051】
本実施の形態2においては、前眼部キー91、眼内キー92の操作に応じて、前記ハロゲン電球からなる光源51の電圧を変更し、被検眼Eの眼底Efに対する照明光、前眼部Edに対する照明光の各照度の最適化を行うようにしたことが特徴である。
【0052】
即ち、リットを細かく切る必要があるとき、前眼部キー91を操作して、前眼部モードに設定した場合、前記制御部81の制御の基に光源51に対する駆動電圧が例えば図11、図12に示す12Vに設定され、この状態で照明系8の動作で前眼部Edに最高照度に近い照度(光束800ルーメン程度)となる状態で照射が可能となる。
【0053】
この結果、実施の形態1の場合と同様、検者眼E0 により前眼部像Ed´として明確に観察することが可能となる。
【0054】
一方、前記眼内キー92を操作して、眼内モードに設定した場合、前記制御部81の制御の基に前記光源51に対する駆動電圧が例えば図11、図12に示す8Vに設定され、この状態で最大でも照明系8の動作で眼底Efに前眼部モードに比べ1/4程度に落ちた照度(光束220ルーメン程度)となる状態でしか照射できなくなる。この結果、実施の形態1の場合と同様、検者眼E0 により、照度の低い見易い眼底像Ef´として観察することが可能となる。
【0055】
ハロゲン電球からなる光源51の波長と分光放射輝度の変化との関係は、照度40万ルクスの場合、図13に示す特性aに示す如くであり、このとき色温度は3810Kである。
【0056】
また、前記色温度変換素子61をハロゲン電球からの照明光の光路に入れた場合には、光源51の波長と分光放射輝度の変化との関係は図13に示す特性bに示す如くであり、このとき色温度は3387K付近である。
【0057】
従って、本実施の形態2のように、眼内モードで光源51に対する駆動電圧を低下させて眼底Efの照明を行うと、恰も色温度変換能力の高い色温度変換素子61を照明光の光路に入れたかのようにして照度の低い見易い眼底像Ef´として観察することができる。
【0058】
また、上述した実施の形態1、2の双方の動作を組み合わせ、眼内モード時に前記制御部81の制御の基に色温度変換素子61の光路への挿入と、光源51に対する駆動電圧の低減とを連動させることで、より一層見易い眼底像Ef´を結像させ、検者眼E0 により観察したり、撮像カメラ43により撮像しより一層見易い眼底像Ef´として表示することも可能である。
【0059】
尚、照明系8においては、図示していないが、観察機能を向上する等の目的で、NDフィルター、グリーンフィルター、防熱フィルター、赤外線フィルター等が使用されるが、これらのフィルター群を組み込んだフィルター基板に上述した色温度変換素子61の色温度変換フィルター63を組み込んだ構成とすることも可能であり、これにより、色温度変換素子61を別途組み込む場合よりも省スペース化、コスト低減を図れる。
【0060】
尚、図12は、本実施の形態2における電圧表示部100を示すものである。この電圧表示部100は、例えば液晶ディスプレイ等を用い、図12の左欄に示すように0乃至16Vのフル目盛101aと図12の右欄に示すように0乃至8Vのハーフ目盛101bとを随時切り替え表示する構成としている。
【0061】
このような電圧表示部100を用いることにより、前眼部モード、眼内モードの区別を明確に行いつつ光源51の駆動電圧を確認することができる。
【0062】
また、前眼部キー91を操作して、前眼部モードに設定した状態において、色温度変換素子61の光路への挿入を行って、前眼部像Ed´を観察することももちろん可能である。この場合には、前眼部像Ed´をよりコントラトの高い画像として観察可能である。
【0063】
【発明の効果】
請求項1記載の発明によれば、高い色温度の照明光照射による被検眼の前眼部観察機能を損なうことなく、しかも、被検眼の前眼部以外の眼内観察、例えば眼底観察等を行う場合には色温度を変換した状態での観察像を見ることが可能となり、前眼部観察、眼底観察等を各々良好に行うことができる実体顕微鏡を提供することができる。
【0064】
請求項記載の発明によれば、前眼部像の観察時、眼底等の眼内像の観察時に各々照度が最適の画像を見ることができ、前眼部観察、眼底観察等を各々良好に行うことができる実体顕微鏡を提供することができる。
【0065】
請求項記載の発明によれば、色温度変換と照度変更とを組み合わせて、前眼部観察はもちろん、眼底観察等をより一層良好に行うことができる実体顕微鏡を提供することができる。
【図面の簡単な説明】
【図1】本発明の実施の形態1の実体顕微鏡の外観を示す側面図である。
【図2】本実施の形態1の実体顕微鏡の光学構成を示す概略図である。
【図3】本実施の形態1の実体顕微鏡の観察系の光学構成を示す概略図である。
【図4】本実施の形態1の色温度変換素子の平面図である。
【図5】本実施の形態1の色温度変換素子の他例を示す平面図である。
【図6】本実施の形態1の被検眼に対するスリット光の照射状態を示す説明図である。
【図7】本実施の形態1の前眼部像の表示状態を示す図である。
【図8】本実施の形態1の眼底像の表示状態を示す図である。
【図9】本実施の形態1の及び2の実体顕微鏡の制御系の主要部を示すブロック図である。
【図10】本実施の形態1の実体顕微鏡の変形例を示す概略図である。
【図11】本実施の形態2における光源の駆動電圧−光束特性を示す図である。
【図12】本実施の形態2における電圧表示部を示す説明図である。
【図13】本実施の形態2におけるハロゲン電球と波長の分光放射輝度の変化との関係を示す特性図である。
【符号の説明】
1 実体顕微鏡
6 観察系
8 照明系
12 ミラー
20 撮像装置
31 対物レンズ
32 変倍光学系
34 ビームスプリッタ
35 リレーレンズ
36 プリズム
43 撮像カメラ
51 光源
52 集光レンズ
53 集光レンズ
54 視野絞り
55 投影レンズ
56 ストロボ光源
61 色温度変換素子
63 色温度変換フィルター
65 電磁ソレノイド
81 制御部
82 画像制御部
83 画像モニタ
84 画像メモリ
86 操作スイッチ
91 前眼部キー
92 眼内キー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stereomicroscope, and more specifically, an entity such as a slit lamp microscope, a surgical microscope, or the like that can observe an easy-to-see fundus image and facilitate fundus observation and fundus treatment of an eye to be examined. It relates to a microscope.
[0002]
[Prior art]
For example, a contact lens or a front lens is used when observing the fundus of a subject's eye with a stereomicroscope such as a slit lamp microscope or when performing treatment such as photocoagulation on the fundus. If binocular viewing of the fundus image of the eye to be examined is attempted, the reflected light from the contact kenz or the front lens enters the observation field at this time. In order to avoid this, the angle between the observation optical axis and the illumination optical axis must be increased. As a result, the subject's eye cannot be viewed with both eyes. Therefore, it is inevitably necessary to reduce the angle between the observation optical axis and the illumination optical axis.
[0003]
In addition, when photocoagulation of the fundus of the eye to be examined is performed, it is usual to set the width of the slit light (slit light) to about three times the size of the nipple of the eye to be examined. The angle at which the optical axis of the illumination system is shaken in order to escape reflection from the surface in contact with the air in the lens is not so large.
[0004]
However, when changing the location of the fundus where photocoagulation is performed, the position of the contact lens must also be changed. At this time, the reflected light from the contact lens is included in the fundus image illuminated by the slit light. I will enter.
[0005]
Therefore, the illumination optical axis must be swung with respect to the observation optical axis to escape reflection, which hinders fundus observation and fundus treatment of the eye to be examined.
[0006]
On the other hand, when only the fundus is observed, the observation range is wide and the illumination optical axis needs to be shaken over a wide range. For this reason, the illumination system blocks part of the observation system, making binocular vision of the fundus difficult. .
[0007]
As a countermeasure, for example, a yellow (yellow) type lens is used as the front lens. When using a yellow type front lens, even if the reflected light from the front lens is in the observation field, the angle between the illumination optical axis and the observation optical axis is very small, and binocular vision of the fundus Can be realized to some extent. In addition, the stimulation of the patient's retina is weak and effective in protecting the retina.
[0008]
However, in this case, there is a problem that the yellowness of the fundus image increases.
[0009]
By the way, in the case of a stereomicroscope for the purpose of observing the fundus of the eye to be examined and treating the fundus, a halogen bulb is mainly used as the light source of the illumination system. Illumination light from a halogen bulb has a high color temperature and is suitable for observing the anterior segment of the eye to be examined.
[0010]
However, when performing fundus observation or fundus treatment of the subject's eye, the color temperature of the illumination light is too high, and the fundus image appears whitish, and the treatment is performed while observing or observing a good fundus image with a strong flare component. I can't.
[0011]
It is known that, for example, by using a tungsten light bulb having a low color temperature as a light source of the illumination system, the illumination light becomes a warm color system and the fundus image of the eye to be examined can be observed well.
[0012]
[Problems to be solved by the invention]
As described above, in the case of a stereomicroscope that uses a halogen bulb as the light source of the illumination system, it is suitable for observing the anterior segment of the eye to be examined, but when observing the fundus of the eye to be examined, the color of the illumination light There was a problem that the temperature was too high to be appropriate.
[0013]
Therefore, the present invention can satisfactorily perform fundus observation without impairing the observation function of the anterior segment of the subject's eye, such as the cornea and the crystalline lens, and other parts of the fundus other than the fundus by irradiation with illumination light with a high color temperature. A stereoscopic microscope is provided.
[0016]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a stereomicroscope having an illumination system that irradiates the subject's eye with illumination light emitted from a light source composed of a halogen bulb, and an observation system that observes an image of the subject's eye illuminated by the illumination system. A color temperature conversion element that converts the color temperature of illumination light or observation light that can be inserted into and removed from either the optical path of the illumination system or the observation system, and the observation mode for the eye to be examined. Mode switching means for switching between the mode and the intraocular observation mode, and when the mode switching means switches to the intraocular observation mode, the color temperature conversion element is inserted into either the light path of the illumination system or the optical path of the observation system, And a conversion element driving unit for detaching the color temperature conversion element from the optical path of the illumination system or the optical path of the observation system when switched to the eye observation mode.
[0017]
According to this invention, when switching to the intraocular observation mode by the mode switching means, the color temperature conversion element is inserted into either the optical path of the illumination system or the optical path of the observation system by the conversion element driving means, When switching to the anterior ocular segment observation mode, the color temperature conversion element is separated from the light path of the illumination system or the light path of the observation system. In the case of performing intraocular observation other than the anterior ocular segment of the eye to be examined, for example, fundus oculi observation, without observing the anterior ocular segment observation function, view the observation image with the color temperature converted by the color temperature conversion element Thus, anterior ocular segment observation, fundus oculi observation and the like can be performed satisfactorily.
[0018]
According to a second aspect of the present invention, there is provided a stereomicroscope having an illumination system for irradiating the eye to be inspected with illumination light emitted from a light source composed of a halogen bulb, and an observation system for observing an image of the eye to be examined illuminated by the illumination system. , A mode switching means for switching the observation mode for the eye to be examined between an anterior ocular segment observation mode and an intraocular observation mode, and the halogen according to the switching to the intraocular observation mode and the anterior ocular segment observation mode by the mode switching means. and changing the voltage of the light source consisting of bulbs, it is characterized in that it has a light source voltage control means to optimize the respective intensity of the illumination light to the illumination light, the anterior segment with respect to the eye of the eye.
[0019]
According to the present invention, the light source voltage control means changes the voltage of the light source composed of the halogen bulb in accordance with the switching between the anterior ocular segment observation mode and the intraocular observation mode by the mode switching means, and the illumination of the eye within the eye to be examined is performed. Optimizing the illuminance of the light and the illumination light for the anterior ocular segment allows optimal images to be seen when observing the anterior segment image and observing intraocular images such as the fundus. It is possible to satisfactorily perform part observation, fundus observation, and the like.
[0020]
According to a third aspect of the present invention, there is provided a stereomicroscope comprising: an illumination system that irradiates the subject's eye with illumination light emitted from a light source composed of a halogen bulb; and an observation system that observes an image of the subject's eye illuminated by the illumination system. A color temperature conversion element that converts the color temperature of illumination light or observation light that can be inserted into and removed from either the optical path of the illumination system or the observation system, and the observation mode for the eye to be examined. Mode switching means for switching between the mode and the intraocular observation mode, and when the mode switching means switches to the intraocular observation mode, the color temperature conversion element is inserted into either the light path of the illumination system or the optical path of the observation system, Conversion element driving means for detaching the color temperature conversion element from the optical path of the illumination system or the optical path of the observation system when switched to the eye part observation mode, and an intraocular observation mode and anterior eye part observation by the mode switching means A light source voltage control means for changing the voltage of the light source composed of the halogen light bulb in conjunction with the switching to the mode, and optimizing the illuminance of the illumination light in the eye of the eye to be examined and the illumination light of the anterior eye portion; It is characterized by having.
[0021]
According to the present invention, the eye of the eye to be inspected by the color temperature conversion by the color temperature conversion element and the light source voltage control means, particularly when observing an intraocular image such as the fundus, in the configuration combining the inventions of claims 2 and 3. Even better fundus observation and the like can be performed by a synergistic effect with illumination intensity conversion of illumination light to the inside.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described.
[0023]
(Embodiment 1)
The stereomicroscope 1 according to the first embodiment shown in FIG. 1 includes a base 4 supported on a table 2 so as to be movable in a horizontal horizontal direction and a horizontal vertical direction via a moving mechanism unit 3, and a base by tilting operation. An operation handle 5 for displacing 4 in the horizontal and horizontal directions and a horizontal vertical direction, an observation system 6 supported by the base 4, and an illumination system 8 having a slit arranged facing the light source and the lens barrel body, A chin rest 10a having a subject's chin rest 10a and a forehead rest 10b facing a lens barrel body 9 housing the objective lens of the observation system 6 is provided. A rotating shaft for changing the magnification of observation is provided on the side surface of the lens barrel main body 9, and 6, 10, 16, 25, 40, etc., which indicate the observation magnification of the observation system 6 on the outer periphery with respect to this rotating shaft. An operation knob 11 with numbers is attached.
[0024]
2 and 3 show an outline of the optical configuration of the stereomicroscope 1 according to the present embodiment. The slit lamp microscope 1 includes an observation system 6 housed in a barrel main body 9 and a barrel main body 9. And the illumination system 8 that is orthogonally arranged with respect to the mirror 12 that faces the eye E to be examined.
[0025]
The observation system 6 includes a mirror 12, an objective lens 31, a variable magnification optical system 32, a beam splitter 34, a relay lens 35, a prism 36 that changes the optical path to the eyepiece tube 9a side, and an eyepiece tube 9a. And an image of the eye E (an anterior ocular segment image shown in FIG. 7, a fundus image shown in FIG. 8, etc.) is formed at an imaging point P shown in FIG. Observation is made possible by E0.
[0026]
The imaging device 20 includes a condenser lens 41 that collects a light beam branched by the beam splitter 34, a mirror 42 that bends the light beam from the condenser lens 41 at a right angle of 90 degrees, and an imaging camera 43. ing.
[0027]
As shown in FIG. 3, the observation system 6 has two systems so as to enable stereoscopic viewing by the examiner's eye E0.
[0028]
As shown in FIG. 2, the illumination system 8 includes a light source 51 composed of a halogen lamp, condensing lenses 52 and 53 for condensing light from the light source 51, and light that has passed through the condensing lenses 52 and 53. A field stop 54 that passes only a part of the light source, a projection lens 55 that projects light that has passed through the field stop 54, and a strobe light source 56 such as a xenon lamp disposed between the light source 51 and the condenser lens 52. It has.
[0029]
The field stop 54 and the eye E to be examined are arranged so as to be in a conjugate position with respect to the projection lens 55, so that, for example, the cornea of the eye E via the mirror 12 is shown in FIG. In addition, irradiation with local illumination light (hereinafter referred to as “slit light”) makes it possible to observe an anterior ocular segment image Ed ′ corresponding to the corneal cross section (indicated by hatching in FIG. 6) Ed of the eye E to be examined. Yes.
[0030]
The stereomicroscope 1 of the first embodiment further includes a color temperature conversion element that converts the color temperature of the observation light between the variable magnification optical system 32 and the condenser lens 33, as shown in FIGS. 61 is detachably arranged by the operation of an electromagnetic solenoid 65 which is a color temperature conversion element driving means.
[0031]
As shown in FIG. 4, the color temperature conversion element 61 includes two color temperature conversion filters 63 on a substrate 62 with a predetermined interval (an interval at which the center interval coincides with the distance L between the optical axes for both eyes of the illumination system 6. ).
[0032]
Instead of the color temperature conversion element 61, as shown in FIG. 4, two color temperature conversion filters 66 are provided on the rotating disk 64 at an interval corresponding to the distance L between the optical axes in a 180 degree arrangement. The color temperature conversion element 61A is provided with two color holes 67 at positions shifted by 90 degrees from each of the color temperature conversion filters 66, and the color temperature conversion element 61A is rotationally driven by a rotation driving means (not shown). A single color temperature conversion filter 66 is inserted into the optical axis for both eyes of the illumination system 6 (in the intraocular mode), or two open holes 67 are inserted into the optical axis for both eyes of the illumination system 6 ( It can also be configured in the anterior segment mode).
[0033]
FIG. 9 shows the main part of the control system of the stereomicroscope 1, which functions as a light source voltage control means for performing the lighting drive of the light source 51 and the voltage control of the drive voltage, and controls the lighting of the strobe light source 55 and the like. Including the control unit 81 that controls the entire actual microscope 1, the imaging camera 43, a power supply unit 85 that supplies power necessary for the operation of the entire stereoscopic microscope 1, and an operation that supplies an operation signal to the control unit 81 An image control unit 82 that captures an image signal from the imaging camera 43, an image monitor 83 such as a liquid crystal display connected to the image control unit 82, and a storage unit connected to the image control unit 82. The image memory 84 is added. The image control unit 82, the image monitor 83, and the image memory 84 are configured as an image processing apparatus separate from the stereomicroscope 1.
[0034]
The operation switch 86 includes an anterior eye key 91 for setting the observation mode for the eye E to be anterior eye mode, and an intraocular key 92 for setting the observation mode for the eye E to be intraocular mode. The anterior segment mode refers to a mode for observing the cornea, iris, lens, etc. of the eye E, and the intraocular mode refers to a mode for observing the fundus, vitreous body, etc. of the subject eye E. Will be explained.
[0035]
Next, the operation of the stereomicroscope 1 according to the first embodiment described above will be described.
[0036]
In this stereomicroscope 1, when the anterior eye part key 91 is operated to set the anterior eye part mode, the electromagnetic solenoid 65 remains in an inoperative state under the control of the control part 81, and the color temperature conversion element The color temperature conversion filter 63 is in a detached state where it is not inserted into the light path of the illumination system 6.
[0037]
The light emitted from the light source 51 composed of the halogen bulb passes through the field stop 54 via the condenser lens 52. Since the field stop 54 and the eye E to be examined are arranged in a conjugate manner, the slit light formed after passing through the field stop 54 passes through the projection lens 55 and the mirror 12 and the anterior eye of the eye E as shown in FIG. Irradiated to a portion (corneal cross section: hatched in FIG. 6) Ed.
[0038]
In this way, the light irradiated to the eye E and reflected by the corneal section Ed of the eye E and the light beam reflected by the whole eye E pass through the objective lens 31 of the observation system 6 in a state of high color temperature. Further, a part of the beam is formed at the image point P shown in FIG. 2 through the beam splitter 34, and is clearly observed as an anterior segment image Ed 'by the examiner's eye E0.
[0039]
Further, the light beam branched by the beam splitter 34 enters the imaging camera 43 through the mirror 42, whereby an observation image identical to the observation image of the examiner's eye E0 is captured by the imaging camera 43, and the image control is performed. The image is sent to the image monitor 83 under the control of the unit 82 and displayed as an anterior segment image Ed ′ as shown in FIG.
[0040]
On the other hand, when the intraocular key 92 is operated to set the intraocular mode, the electromagnetic solenoid 65 operates based on the control of the control unit 81, and the color temperature conversion filter 63 of the color temperature conversion element 61 is connected to the illumination system. 6 is inserted into the optical path.
[0041]
Thereby, illumination light is irradiated to the fundus oculi Ef of the eye E to be examined through the same path as described above, and the reflected light from the fundus oculi passes through the objective lens 31 of the observation system 6, and further, the zoom optical system 32, A part of the color temperature is converted to an image forming point P shown in FIG. 2 through the color temperature conversion filter 63 and the beam splitter 34, and is formed as a warm-colored easy-to-see fundus image Ef ', which is observed by the examiner's eye E0. The
[0042]
Further, it is sent to the image monitor 83 and displayed as a fundus oculi image Ef ′ as shown in FIG.
[0043]
As described above, according to the first embodiment, it is possible to perform anterior eye part observation, fundus observation, and the like of the eye E under good conditions.
[0044]
FIG. 10 shows a modification of the first embodiment. Instead of the case shown in FIG. 2, the color temperature of the illumination light is converted between the field stop 54 and the projection lens 55 of the illumination system 8. The color temperature conversion element 61 is characterized in that it can be inserted and removed by the operation of an electromagnetic solenoid 65 which is a color temperature conversion element driving means.
[0045]
Considering the case where the color temperature conversion filter 63 is placed in the optical path of the illumination system 8, the color temperature at the fundus oculi Ef is K1, and the color temperature at the fundus oculi Ef when the color temperature conversion element 61 is placed in the illumination system 8 is K2, If the color temperature conversion capability (mired value) of the color temperature conversion element 61 is a, the color temperature K2 at the fundus oculi Ef can be expressed by the following equation (1).
[0046]
[Expression 1]
Figure 0004476406
For example, if the color temperature K1 without the color temperature conversion element 61 at the fundus oculi Ef = 3300K and the color temperature conversion capability a = 40, the color temperature K2 of the fundus oculi Ef ′ with the color temperature conversion element 61 inserted. = 2915K.
[0047]
If the color temperature K1 without the color temperature conversion element 61 in the fundus oculi Ef is 3800K and the color temperature conversion capability a is 40, the color temperature K2 in the fundus oculi Ef when the color temperature conversion element 61 is inserted. = 3299K.
[0048]
The fundus image Ef ′ of the fundus Ef having such a color temperature is still observed as pale. Further, it is known that a preferable color temperature on the object plane (fundus Ef plane) is about 2500K to 2900K.
[0049]
In the first embodiment, the color temperature conversion element 61 having the color temperature conversion capability a so that the color temperature on the object plane (fundus Ef plane) is about 2500K to 2900K is selected.
[0050]
(Embodiment 2)
Next, the stereomicroscope 1 according to the second embodiment of the present invention will be described with reference to FIGS. 9, 11, 12, and 13. FIG. FIG. 11 shows the voltage-beam characteristics of the light source 51 composed of a general 12V, 30 W halogen bulb. FIG. 13 is a characteristic diagram showing the relationship between the wavelength of a 12 V, 30 W halogen bulb and the change in spectral radiance.
[0051]
In the second embodiment, the voltage of the light source 51 composed of the halogen bulb is changed in accordance with the operation of the anterior segment key 91 and the intraocular key 92, and the illumination light for the fundus oculi Ef of the eye E to be examined, the anterior segment The feature is that each illuminance of illumination light with respect to Ed is optimized.
[0052]
That is, when the lit needs to be cut finely, when the anterior segment key 91 is operated to set the anterior segment mode, the driving voltage for the light source 51 is controlled based on the control of the control unit 81, for example, FIG. In this state, it is possible to irradiate the anterior segment Ed with an illuminance close to the maximum illuminance (light flux of about 800 lumens) by the operation of the illumination system 8.
[0053]
As a result, as in the case of the first embodiment, it is possible to clearly observe the anterior segment image Ed ′ with the examiner's eye E0.
[0054]
On the other hand, when the intraocular key 92 is operated to set the intraocular mode, the driving voltage for the light source 51 is set to 8 V shown in FIGS. 11 and 12, for example, based on the control of the control unit 81. At maximum, the illumination system 8 can irradiate the fundus oculi Ef only in a state where the illuminance (luminous flux is about 220 lumens) is reduced to about ¼ compared to the anterior segment mode. As a result, as in the case of the first embodiment, the examiner's eye E0 can be observed as an easy-to-see fundus image Ef 'with low illuminance.
[0055]
The relationship between the wavelength of the light source 51 composed of a halogen light bulb and the change in spectral radiance is as shown by the characteristic a shown in FIG. 13 in the case of an illuminance of 400,000 lux. At this time, the color temperature is 3810K.
[0056]
When the color temperature conversion element 61 is placed in the optical path of the illumination light from the halogen bulb, the relationship between the wavelength of the light source 51 and the change in spectral radiance is as shown by the characteristic b shown in FIG. At this time, the color temperature is around 3387K.
[0057]
Accordingly, as in the second embodiment, when the fundus oculi Ef is illuminated by reducing the driving voltage for the light source 51 in the intraocular mode, the color temperature conversion element 61 having a high color temperature conversion capability is used as the optical path of the illumination light. It can be observed as an easy-to-see fundus image Ef ′ with low illuminance as if it was inserted.
[0058]
Further, by combining the operations of both the first and second embodiments described above, the color temperature conversion element 61 is inserted into the optical path under the control of the control unit 81 in the intraocular mode, and the driving voltage for the light source 51 is reduced. Can be linked together to form a fundus image Ef 'that is easier to see, and can be observed with the examiner's eye E0, or captured with the imaging camera 43 and displayed as a fundus image Ef' that is easier to see.
[0059]
In the illumination system 8, although not shown, an ND filter, a green filter, a heat insulating filter, an infrared filter, and the like are used for the purpose of improving the observation function. A filter incorporating these filter groups It is also possible to adopt a configuration in which the color temperature conversion filter 63 of the color temperature conversion element 61 described above is incorporated in the substrate, and thereby, space saving and cost reduction can be achieved as compared with the case where the color temperature conversion element 61 is separately incorporated.
[0060]
FIG. 12 shows the voltage display unit 100 according to the second embodiment. The voltage display unit 100 uses, for example, a liquid crystal display or the like, and displays a full scale 101a of 0 to 16V as shown in the left column of FIG. 12 and a half scale 101b of 0 to 8V as shown in the right column of FIG. The display is switched.
[0061]
By using such a voltage display unit 100, the driving voltage of the light source 51 can be confirmed while clearly distinguishing between the anterior segment mode and the intraocular mode.
[0062]
In addition, it is of course possible to observe the anterior segment image Ed ′ by operating the anterior segment key 91 and inserting the color temperature conversion element 61 into the optical path in the state where the anterior segment mode is set. is there. In this case, the anterior segment image Ed ′ can be observed as a higher contrast image.
[0063]
【The invention's effect】
According to the invention of claim 1 Symbol placement, higher color temperature without compromising the anterior segment observation function of the eye with illumination light irradiation, moreover, intraocular observation other than the anterior segment of the eye, for example, the fundus observation, etc. When performing the above, it becomes possible to see an observation image in a state in which the color temperature is converted, and it is possible to provide a stereomicroscope that can satisfactorily perform anterior ocular segment observation, fundus observation, and the like.
[0064]
According to the second aspect of the present invention, when observing the anterior ocular segment image and observing the intraocular image such as the fundus oculi, it is possible to see images each having the optimum illuminance, and the anterior ocular segment observation and the fundus oculi observation are favorable. It is possible to provide a stereomicroscope that can be performed on
[0065]
According to the third aspect of the present invention, it is possible to provide a stereomicroscope that can perform the fundus observation and the like more satisfactorily as well as the anterior ocular segment observation by combining the color temperature conversion and the illuminance change.
[Brief description of the drawings]
FIG. 1 is a side view showing an appearance of a stereomicroscope according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating an optical configuration of the stereomicroscope according to the first embodiment.
FIG. 3 is a schematic diagram showing an optical configuration of an observation system of the stereoscopic microscope according to the first embodiment.
FIG. 4 is a plan view of the color temperature conversion element according to the first embodiment.
FIG. 5 is a plan view showing another example of the color temperature conversion element according to the first embodiment.
FIG. 6 is an explanatory diagram showing a state of slit light irradiation on the eye to be examined according to the first embodiment.
FIG. 7 is a diagram illustrating a display state of an anterior segment image according to the first embodiment.
FIG. 8 is a diagram illustrating a display state of a fundus image according to the first embodiment.
FIG. 9 is a block diagram showing a main part of a control system of the stereoscopic microscope according to the first and second embodiments.
FIG. 10 is a schematic diagram showing a modification of the stereoscopic microscope according to the first embodiment.
FIG. 11 is a diagram showing a drive voltage-light beam characteristic of a light source in the second embodiment.
FIG. 12 is an explanatory diagram showing a voltage display section in the second embodiment.
FIG. 13 is a characteristic diagram showing a relationship between a halogen bulb and a change in spectral radiance of wavelength in the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stereomicroscope 6 Observation system 8 Illumination system 12 Mirror 20 Imaging device 31 Objective lens 32 Variable magnification optical system 34 Beam splitter 35 Relay lens 36 Prism 43 Imaging camera 51 Light source 52 Condensing lens 53 Condensing lens 54 Field stop 55 Projection lens 56 Strobe light source 61 Color temperature conversion element 63 Color temperature conversion filter 65 Electromagnetic solenoid 81 Control unit 82 Image control unit 83 Image monitor 84 Image memory 86 Operation switch 91 Anterior eye key 92 Intraocular key

Claims (3)

被検眼にハロゲン電球からなる光源が出射する照明光を照射する照明系と、
この照明系により照明される被検眼の像を観察する観察系とを有する顕微鏡において、
前記照明系の光路又は観察系の光路のいずれかに挿脱可能に備えた照明光又は観察光の色温度を変換する色温度変換素子と、
前記被検眼に対する観察モードを、前眼部観察モードと眼内観察モードとに切り換えるモード切替手段と、
モード切替手段により眼内観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路のいずれかに挿入し、前眼部観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路から離脱させる変換素子駆動手段と、
を有することを特徴とする実体顕微鏡。
An illumination system for irradiating the eye to be examined with illumination light emitted from a light source composed of a halogen bulb;
In a microscope having an observation system for observing an image of an eye to be examined illuminated by this illumination system,
A color temperature conversion element for converting the color temperature of the illumination light or observation light, which is detachably provided in either the optical path of the illumination system or the optical path of the observation system;
Mode switching means for switching the observation mode for the eye to be examined between an anterior ocular segment observation mode and an intraocular observation mode;
When the mode switching means switches to the intraocular observation mode, the color temperature conversion element is inserted into either the illumination system optical path or the observation system optical path, and when switched to the anterior ocular segment observation mode, the color temperature conversion element is Conversion element driving means for separating from the optical path of the illumination system or the optical path of the observation system;
A stereomicroscope characterized by comprising:
被検眼にハロゲン電球からなる光源が出射する照明光を照射する照明系と、
この照明系により照明される被検眼の像を観察する観察系とを有する実体顕微鏡において、
前記被検眼に対する観察モードを、前眼部観察モードと眼内観察モードとに切り換えるモード切替手段と、
モード切替手段による眼内観察モード、前眼部観察モードへの切り替えに応じて、前記ハロゲン電球からなる光源の電圧を変更し、被検眼の眼内に対する照明光、前眼部に対する照明光の各照度の最適化を行う光源電圧制御手段と、
を有することを特徴とする実体顕微鏡。
An illumination system for irradiating the eye to be examined with illumination light emitted from a light source composed of a halogen bulb;
In a stereomicroscope having an observation system for observing an image of an eye to be examined illuminated by this illumination system,
Mode switching means for switching the observation mode for the eye to be examined between an anterior ocular segment observation mode and an intraocular observation mode;
According to the switching to the intraocular observation mode and the anterior ocular segment observation mode by the mode switching means, the voltage of the light source consisting of the halogen bulb is changed, and each of the illumination light for the intraocular eye of the subject eye and the illumination light for the anterior eye portion Light source voltage control means for optimizing illuminance;
A stereomicroscope characterized by comprising:
被検眼にハロゲン電球からなる光源が出射する照明光を照射する照明系と、
この照明系により照明される被検眼の像を観察する観察系とを有する実体顕微鏡において、
前記照明系の光路又は観察系の光路のいずれかに挿脱可能に備えた照明光又は観察光の色温度を変換する色温度変換素子と、
前記被検眼に対する観察モードを、前眼部観察モードと眼内観察モードとに切り換えるモード切替手段と、
モード切替手段により眼内観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路のいずれかに挿入し、前眼部観察モードに切り換えた時前記色温度変換素子を前記照明系の光路又は観察系の光路から離脱させる変換素子駆動手段と、
前記モード切替手段による眼内観察モード、前眼部観察モードへの切り替えに連動して、前記ハロゲン電球からなる光源の電圧を変更し、被検眼の眼内に対する照明光、前眼部に対する照明光の各照度の最適化を行う光源電圧制御手段と、
を有することを特徴とする実体顕微鏡。
An illumination system for irradiating the eye to be examined with illumination light emitted from a light source composed of a halogen bulb;
In a stereomicroscope having an observation system for observing an image of an eye to be examined illuminated by this illumination system,
A color temperature conversion element for converting the color temperature of the illumination light or observation light, which is detachably provided in either the optical path of the illumination system or the optical path of the observation system;
Mode switching means for switching the observation mode for the eye to be examined between an anterior ocular segment observation mode and an intraocular observation mode;
When the mode switching means switches to the intraocular observation mode, the color temperature conversion element is inserted into either the illumination system optical path or the observation system optical path, and when switched to the anterior ocular segment observation mode, the color temperature conversion element is Conversion element driving means for separating from the optical path of the illumination system or the optical path of the observation system;
In conjunction with switching to the intraocular observation mode and the anterior ocular segment observation mode by the mode switching means, the voltage of the light source composed of the halogen bulb is changed, and the illumination light for the intraocular eye of the subject eye, the illumination light for the anterior eye segment A light source voltage control means for optimizing each illuminance of
A stereomicroscope characterized by comprising:
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JP4289973B2 (en) * 2003-10-30 2009-07-01 株式会社扶桑プレシジョン Color correction device for quantifying cataract symptoms based on color image data of cataract eye obtained from slit lamp microscope
JP2009095518A (en) * 2007-10-18 2009-05-07 Topcon Corp Slit lamp microscope
JP2009207590A (en) * 2008-03-03 2009-09-17 Topcon Corp Stereomicroscope
US12137873B2 (en) 2009-06-18 2024-11-12 Endochoice, Inc. Compact multi-viewing element endoscope system
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CA2798716A1 (en) 2011-12-13 2013-06-13 Endochoice Innovation Center Ltd. Removable tip endoscope
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JP6915968B2 (en) * 2016-06-09 2021-08-11 株式会社トプコン Ophthalmic Surgical Microscope
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