JP2004159784A - Ocular characteristic measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To precisely measure the optical characteristics of an examination eye with a large quantity of aberration. <P>SOLUTION: A first illumination optical system 10 illuminates the examination eye 100 with wide beams of the luminous flux from a light source 11. A first light receiving part 21A receives the reflected luminous flux from the examination eye at least substantially converted to 17 beams by a first conversion member 22A. A first compensation optical part 60A is disposed in the first illumination optical system 10 for compensating the aberration for the illumination luminous flux to the examination eye 100. On the other hand, a second compensation optical part 60B is disposed in a first light receiving optical system 20A for compensating the aberration of the reflected luminous flux from the examination eye 100. An operation part calculates the quantity of compensation to offset the aberration based on the output of the first light receiving part 21A, deforms the first and second compensation optical parts 60A and 60B, and compensates the aberration. Further, the operation part finds the optical characteristics of the examination eye 100 based on the optical characteristics based on the output of the first light receiving part 21A after compensation and based on the compensated optical characteristics. <P>COPYRIGHT: (C)2004,JPO

Description

（ｆ：第１測定部２５Ａのハルトマン板とＣＣＤとの距離）
【００３５】
ここで、波面Ｗをゼルニケ多項式Ｚ_ｉ ^２ｊ−ｉを使った展開であらわすと、
【００３６】
【数２】

【００３７】
上の２つの式と、測定で求められた△ｘ、△ｙ（よって、Ｘ、Ｙも含む）に関する測定値を使って、ゼルニケ係数ｃ_ｉ ^２ｊ−ｉの各値を求めることができる。また、角膜収差を求める場合、前眼部観察部４０の前眼部像受光部４１からの信号に基づき、角膜の傾き及び角膜の高さを計算し、角膜を光学レンズと同様に扱うことにより光学特性が計算される。なお、図３３、図３４に、ゼルニケ多項式についての説明図（１）及び（２）を示す。
【００３８】
次に、演算部６００は、測定結果が得られたか判断する（Ｓ１０３）。演算部６００は、例えば、収差測定１において取得したハルトマン像の各点像の重心位置が所定の数以上（例えば３分の１以上）取れない、又は各点像のぼけが大きい（例えば、無収差時の２０倍以上など）、又は隣接するスポット像と分離できずに検出できない点が所定の数以上ある等の予め定められたひとつ又は複数の適宜の条件に従い判断することができる。ここで、演算部６００は、測定結果が得られた場合（Ｓ１０３）、ステップＳ１０５の処理へ移り、一方、測定結果が得られなかった場合（Ｓ１０３）、ステップＳ１５０の処理へ移る。
【００３９】
ステップＳ１０５では、演算部６００は、求められた収差を打ち消すような第１及び第２補償光学部６０Ａ及び６０Ｂにおける補償量Ｍを求め、制御部６１０及び第５駆動部９１４を介して、補償量Ｍに応じた信号（１５）を出力し、可変鏡等の第１及び第２補償光学部６０Ａ及び６０Ｂをゆがませる（Ｓ１０５）。また、第１及び第２補償光学部６０Ａ及び６０Ｂは、信号（１５）に従い適宜の変形手段により変形する。なお、第１及び第２補償光学部６０Ａ及び６０Ｂは、可変鏡以外に、液晶空間光変調器を用いても良い。第１補償光学部６０Ａにより入射光の収差を補償することで、被検眼１００の収差量が多い場合においても眼底上に点光源を作る照明状態することができる。特に、収差の影響を受けやすいダブルパス測定においては、収差の影響を取り除くことができる。また、第２補償光学部６０Ｂにより、被検眼から戻ってくる反射光束の収差を補償することで、補償後の光束を精密に測定することが可能となる。以下、収差を打ち消すための補償量Ｍの算出について説明する。
【００４０】
図５は、可変鏡上の座標（Ｘ_ｍ、Ｙ_ｍ）と光学系の座標（Ｘ、Ｙ）の関係の説明図である。補償する収差をＷｃとし、解析された収差の式が、
【００４１】
【数３】

【００４２】
であるとき、可変鏡上の座標（Ｘ_ｍ、Ｙ_ｍ）と光学系の座標（Ｘ、Ｙ）の関係は、可変鏡への入射角θを考慮して、
【００４３】
【数４】

【００４４】
となる。可変鏡の補償量Ｍは、反射であることから２倍効くことと、目の瞳孔と可変鏡での倍率を考慮する。可変鏡の瞳孔に対する倍率をｋとすると、補償量Ｍは、
【００４５】
【数５】

【００４６】
となる。ここで求められた補償量Ｍは、収差の高次成分を含むことができる。第１及び第２補償光学部６０Ａ及び６０Ｂは、演算部６００から出力された補償量Ｍに基づいて変形する。なお、倍率ｋ及び無補償状態での入射角θは予め設定された値であり、予めメモリ８００に記憶されている。
【００４７】
なお、収差の低次成分である球面度数成分は、移動部１５によって第１受光部２５Ａを移動させることにより補償することもできる。また、低次成分の乱視成分は、バリアブルクロスシリンダーを回動することにより補償することもできる。また、ゆがませた可変鏡をさらにゆがませる場合、補償後に測定された収差に対して上記の解析と同様に補償量Ｍを求め、補償後の可変鏡にさらにその分を付加すればよい。また、第１及び第２補償光学部６０Ａ及び６０Ｂにより完全に収差をなくすのではなく、若干ハルトマン板への入射光を発散方向にする又は傾けるようにしてもよい。これにより例えば、長焦点又は高感度の第１変換部材２２Ａを有する第１受光光学系２０Ａを用いて感度の高い測定を行うことができる。
【００４８】
ステップＳ１５０では、演算部６００は、ステップＳ１０１での測定結果以外による収差補償処理を行い（Ｓ１５０）、ステップＳ１０７へ移る。
【００４９】
図４は、収差測定１以外による収差補償処理のフローチャートである。以下、図４に示す処理について説明する。
まず、演算部６００は、おおよその収差量が分かる、もしくは適当に収差補正をしてみるか判断する（Ｓ１５１）。例えば、角膜収差，過去の収差データ等を参考に測定を続けるかどうか判断する。判断方法としては、演算部６００は、自動的に表示したダイアログボックス、もしくはメニューから立ち上げた入力部６５０等から測定を続ける又は終了する信号を入力しても良い。また、演算部６００は、メモリ８００に角膜収差データ又は過去の収差データがあるかを検索し、データの有無によって測定を続けるか終了するかを判断しても良い。
【００５０】
演算部６００は、測定を続けない場合、表示部７００に解析不可能通知表示を行い（Ｓ１５３）、測定を終了する。一方、演算部６００は、測定を続ける場合、角膜収差データ、過去の収差データ等のゼルニケ係数、収差データ等を、装置内のメモリ８００、もしくは入力部６５０から入力し、可変鏡等の第１及び第２補償光学部６０Ａ及び６０Ｂの補償量Ｍを求め、制御部６１０及び第５駆動部９１４を介して可変鏡をゆがませる（Ｓ１５５）。また、演算部６００は、前眼部観察部４０の前眼部像受光部４１からの信号を入力して角膜収差を求め、求めた収差に基づいて補償量Ｍを算出してもよい。補償量Ｍの算出についてはステップＳ１０５と同様である。演算部６００は、制御部６１０及び第５駆動部９１４を介して、補償量Ｍに応じた信号（１５）を出力し、第１及び第２補償光学部６０Ａ及び６０Ｂをゆがませる。本実施の形態では、ハルトマン像から被検眼の光学特性が測定できない場合に、上述のように角膜収差等に基づいて第１及び第２補償光学部６０Ａ及び６０Ｂにより収差を補償することで測定可能となるようにする。
【００５１】
次に、演算部６００は、補償後に光学特性の測定が可能か判断する（Ｓ１５７）。演算部６００は、例えば、第１受光部２１Ａからハルトマン像を入力し、入力したハルトマン像の重心位置が所定の数以上（例えば３分の１）取れない、もしくは各点像のぼけが大きい（例えば、無収差時の２０倍以上など）、もしくは隣接するスポット像と分離できずに検出できない点が所定の数以上ある等の予め定められたひとつ又は複数の適宜の条件に従い判断することができる。演算部６００は、測定不可能な場合、さらに補償するか判断する（Ｓ１５９）。例えば、演算部６００は、自動的に表示したダイアログボックス、もしくはメニューから立ち上げた入力部６５０等から測定を続ける又は終了する信号を入力しても良い。また、演算部６００は、メモリ８００に別の収差データがあるかを検索しても良い。演算部６００は、補償する場合はステップＳ１５５へ戻り、一方、補償しない場合は、表示部７００に解析不可能通知を表示し（Ｓ１６１）、測定を終了する。
【００５２】
一方、演算部６００は、測定可能な場合（Ｓ１５７）、収差補償処理を終了する。
図３に戻り、演算部６００は、収差測定２として、第１受光部２１Ａから第１信号を取得し、収差を求める（Ｓ１０７）。ここで求められる収差は、補償後の収差であり、例えば、第１測定部２５Ａによって、微小な収差を高精度に測定可能である。また、角膜収差を第１及び第２補償光学部６０Ａ及び６０Ｂにより補償した場合、ここで求められる収差は眼内収差となる。
【００５３】
次に、演算部６００は、ステップＳ１０７で得られた収差が、予め定められた許容値以下であるか判断する（Ｓ１０９）。例えば、演算部６００は、高次収差のＲＭＳ値が０．１以下であるかを判断しても良い。収差のＲＭＳ値（平均２乗誤差）は、ゼルニケ係数ｃ_ｉ ^２ｊ−ｉを用いて次式で算出される。
【００５４】
【数６】

【００５５】
演算部６００は、これら収差のＲＭＳ値の予め定められた一つ又は複数が許容値以下であるか判断する。
【００５６】
演算部６００は、収差が許容値より大きい場合（Ｓ１０９）、ステップＳ１０５へ戻り、さらに第１及び第２補償光学部６０Ａ及び６０Ｂをゆがませる。一方、演算部６００は、許容値より小さい場合（Ｓ１０９）、ステップＳ１０７で測定された収差に、第１及び第２補償光学部６０Ａ及び６０Ｂで打ち消した収差を加えて、実際の被検眼の収差Ｗ（ゼルニケ係数ｃ_ｉ ^２ｊ−ｉを含む）を求める（Ｓ１１１）。また、演算部６００は、求められたゼルニケ係数ｃ_ｉ ^２ｊ−ｉと光学系の配置（例、移動位置が初期条件でどこに来ているかなどの情報）により、既知の方法をつかって、球面度数Ｓ、乱視度数Ｃ、乱視軸Ａ、高次球面収差等の光学特性を得ることができる。演算部６００は、次式のようにゼルニケ係数の２次項から球面度数Ｓ、乱視度数Ｃ、乱視軸Ａを求めることができる。
【００５７】
【数７】

（ここに、ＳＥ：等価球面度数、Ｓ_ｍｏｖｅ：固視移動分の球面度数、ｒ：瞳径）
【００５８】
演算部６００は、求められた収差マップ、収差係数、ハルトマン像等の測定結果を表示部７００に表示し、メモリ８００に記憶する（Ｓ１１３）。また、演算部６００は、メモリ８００から角膜形状データ等を読み出し、表示部７００にさらに表示しても良い。
【００５９】
さらに、演算部６００は、測定を終了するか判断し（Ｓ１１５）、測定を続ける場合はステップＳ１０１に戻り、終了の場合は測定を終了する。測定終了の判断は、例えば、演算部６００は、自動的に表示したダイアログボックス、もしくはメニューから立ち上げた入力部６５０等から測定を続ける又は終了する信号を入力しても良い。
【００６０】
図６は、第１の実施の形態における光学系を用いた収差測定のフローチャートの変形例である。本変形例は、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行う例である。
【００６１】
まず、演算部６００は、ステップＳ１０１〜Ｓ１０７及びステップＳ１１１の処理を実行する。処理の詳細については上述と同様であるので省略する。
【００６２】
演算部６００は、求められた収差マップ、収差係数等の測定結果を表示部７００に表示し、メモリ８００に記憶する（Ｓ２０１）。なお、表示部７００への表示は必ずしも毎回行う必要はない。例えば、表示部７００への表示処理に時間がかかる等、測定に影響を及ぼす場合、一定の測定回数毎に結果を表示するようにしても良い。
【００６３】
演算部６００は、ステップＳ１１１で得られた収差が、予め定められた許容値以下であるか判断する（Ｓ１０９）。判断基準は、上述と同様とすることができる。演算部６００は、収差が許容値より大きい場合、ステップＳ１０５へ戻り、許容値より小さい場合、求められた収差マップ、収差係数、ハルトマン像等の測定結果を表示部７００に表示し、メモリ８００に記憶する（Ｓ２０３）。なお、ステップＳ２０１において、既に当該測定結果の表示、記憶を行っている場合は、ステップＳ２０３の処理を省略しても良い。また、演算部６００は、収差が許容値以下であるかを判断する代わりに、さらに第１及び第２補償光学部６０Ａ及び６０Ｂをゆがませるかの入力を指示する表示を表示部７００に出力し、入力部６５０から信号を入力するようにしてもよい。次に、演算部６００は、ステップＳ１１５の処理を実行する。処理の詳細は上述と同様である。
【００６４】
２．第２の実施の形態
（光学系構成）
図７は、第２の実施の形態における光学系の構成図である。図７には、図１の点線枠にあたる部分のみを示しているが、その他の部分については図１と同様である。図７における眼特性測定装置は、さらに、短焦点又は低感度の第２測定部２５Ｂ、ビームスプリッタ２３を備える。また、本実施の形態における第１変換部材２２Ａは、長焦点または高感度のレンズ部を有する波面変換部材である。
【００６５】
第２測定部２５Ｂは、第２受光光学系２０Ｂと、第２受光部２１Ｂを有する。第２受光光学系２０Ｂは、第１受光光学系２０Ａと同様に、被検眼１００の網膜から反射して戻ってきた光束を受光し第２受光部２１Ｂに導くためのものである。第２受光光学系２０Ｂは、例えば、第２変換部材２２Ｂ（例えば、ハルトマン板）と、第１受光光学系２０Ａと共用されるアフォーカルレンズ及びバリアブルクロスシリンダー及びリレーレンズを備える。第２変換部材２２Ｂは、反射光束を少なくとも１７本の複数のビームに変換するための短焦点又は低感度のレンズ部を有する波面変換部材である。第２変換部材２２Ｂには、光軸と直交する面内に配置された複数のマイクロフレネルレンズを用いることができる。眼底からの反射光は、第２変換部材２２Ｂを介して第２受光部２１Ｂ上に集光する。第２受光部２１Ｂは、第２変換部材２２Ｂを通過した第２受光光学系２０Ｂからの光を受光し、第２信号を生成するためのものである。第１測定部２５Ａと第２測定部２５Ｂの光束は、ビームスプリッター２３により分けられる。もしくは、ビームスプリッター２３の代わりにミラー部を用いて、このミラー部が動いて光路に挿板されることにより第１又は第２測定部２５Ａ又は２５Ｂに切り替えることもできる。なお、上述の第２の実施の形態における光学系は、ダブルパス測定用に構成されているが、シングルパス測定用に適宜変更することもできる。
【００６６】
本実施の形態における短焦点及び低感度とは、測定可能範囲にわたる第２変換部材２２Ｂにより変換されたビームの変化が、第２変換部材２２Ｂの変換ピッチよりも小さく設定されているものである。その結果、第２受光部２１Ｂで得られる各スポットと格子点との対応付けがしやすく、信号処理が容易かつ高速化が図れる。一方、長焦点又は高感度による測定では、スポット位置のずれが大きくハルトマンの格子の範囲外にもスポットが存在することもある。したがって、収差量が大きい等の理由により、あまりにスポット位置がずれてしまうと、各スポットと格子点との対応付けが難しい場合があり、信号処理に時間がかかることもある。
【００６７】
（共役関係）
第２受光部２１Ｂは、被検眼１００の眼底等と共役である。また、第２受光光学系２０Ｂの第２変換部材２２Ｂは、被検眼１００の瞳（光彩）等と共役である。
【００６８】
（電気系構成）
第２の実施の形態における電気系の構成は、第１の実施の形態における電気系の構成と同様のものを用いることができる。なお、演算部６００は、さらに、第２受光部２１Ｂからの第２信号（１４）を入力し、第２信号（１４）に基づき、被検眼１００の光学特性を求める。
【００６９】
（フローチャート）
図８は、第２の実施の形態における光学系を用いた収差測定のフローチャートである。図８は、短焦点または低感度の第２受光光学系２０Ｂからの信号に基づいて補償量を決定する収差測定のフローチャートである。演算部６００は、第２測定部２５Ｂからの出力に基づいて、第１及び第２補償光学部６０Ａ及び６０Ｂの補償量Ｍを高速に求め、収差が補償されている光束を長焦点又は高感度の第１測定部２５Ａで精密に測定することにより、高感度、かつ高速な測定を可能とする。
【００７０】
まず、演算部６００は、短焦点又は低感度の第２測定部２５Ｂでの信号に基づいて収差測定１を行う（Ｓ２５１）。演算部６００は、第２測定部２５Ｂの第２受光部２１Ｂからハルトマン像の第２信号を取得し、取得した画像に基づき、スポット像の重心点を検出する。無収差での重心点を中心とする矩形エリア内でそのスポットと対応する重心位置を探すことで高速可能となるように対応付けする。演算部６００は、得られたスポット像の重心点に基づいて、被検眼１００の粗い収差を求める。
【００７１】
次に、演算部６００は、ステップＳ１０３、Ｓ１０５、Ｓ１５０の各処理を実行する。処理の詳細は上述と同様であるので省略する。
演算部６００は、長焦点又は高感度の第１測定部２５Ａからの信号に基づいて収差測定２を行う（Ｓ２５７）。演算部６００は、第１測定部２５Ａの第１受光部２１Ａから、ハルトマン像の第１信号を入力する。次に、演算部６００は、入力した第１信号から、ハルトマン像の点像移動量を求め、点像移動量に基づき被検眼の光学特性を求める。従来の長焦点又は高感度の測定部を用いる収差測定では、スポット像のずれが大きくなることがあり、スポット像の対応付けに時間がかかる、又は、対応が取れず測定ができない場合がある。本実施の形態では、入力したハルトマン像の第１信号は、被検眼１００の収差がある程度打ち消されているハルトマン像であるため、長焦点又は高感度であってもスポットの位置ずれは小さくなっており、精密かつ高速な収差演算が可能である。
【００７２】
次に、演算部６００は、ステップＳ１０９〜Ｓ１１５の処理を実行する。処理の詳細は上述と同様であるので省略する。なお、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。
【００７３】
３．第３の実施の形態
図９は、第３の実施の形態における光学系の構成図である。図９には、図１の点線枠にあたる部分のみを示しているが、その他の部分については図１と同様である。図９の光学系は、第２補償光学部６０Ｂが第１及び第２測定部２５Ａ及び２５Ｂに共通して挿入されている。被検眼１００の網膜から反射して戻ってきた光束は、第２補償光学部６０Ｂを介して、第１及び第２測定部２５Ａ及び２５Ｂに導かれる。第２補償光学部６０Ｂを介した光束を第２測定部２５Ｂに導くことにより、補償後の収差を第２測定部２５Ｂでも測定可能となる。また、第２測定部２５Ｂからの出力により測定された収差が予め定められた許容値以下になるまで、第１及び第２補償光学部６０Ａ及び６０Ｂを変形することも可能である。また、第３の実施の形態における光学系の第１変換部材２２Ａは、長焦点または高感度のレンズ部を有する波面変換部材である。なお、上述の第３の実施の形態における光学系は、ダブルパス測定用に構成されているが、シングルパス測定用に適宜変更することもできる。
【００７４】
第３の実施の形態における電気系の構成は、第２の実施の形態における電気系と同様のものを用いることができる。また、第３の実施の形態における光学系を用いた収差測定のフローチャートは、図８に示すフローチャートを用いることができる。
【００７５】
４．第４の実施の形態
本実施の形態は、さらに、第１及び第２補償光学部６０Ａ及び６０Ｂで実際に補償されている収差（補償収差）を測定し、測定した補償収差と補償後の被検眼からの反射光束の収差に基づき、被検眼１００の光学特性を求める形態である。例えば、補償光学部での入力値と、実際の補償収差に誤差がある場合、より精密な測定が可能となる。
【００７６】
図１０は、第４の実施の形態における光学系の構成図である。図１０に示す光学系は、図１に示す第１の実施の形態における光学系に、さらに補償収差測定用の光学系を配置したものであり、第３光源部１６と、ビームスプリッタ１７及び１８と、第３測定部２５Ｃをさらに備える。また、第３測定部２５Ｃは、第３受光光学系２０Ｃ及び第３受光部２１Ｃを有する。その他各部については、図１と同様である。また、図１０には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【００７７】
第３光源部１６は、第３波長の光束を発する。第３光源部１６から発せられる光束は、例えば、第２補償光学部６０Ｂで補償されている収差（第２補償収差）を測定するために用いられる。第３光源部１６からの光束は、レンズを介してビームスプリッタ１７で反射し、第２補償光学部６０Ｂを照射する。例えば、第３光源部１６からの光束は、常に平行光として第２補償光学部６０Ｂに入射するようになっている。第２補償光学部６０Ｂで反射又は透過することによって収差を有した光束は、ビームスプリッタ１８で反射し、第３受光光学系２０Ｃで受光され、その収差が測定される。ビームスプリッタ１７及び１８は、例えば第１光源部１１から発せられる第１波長の光束を透過し、第３光源部１６から発せられる第３波長の光束を反射するダイクロイックミラーを用いることができる。この場合、第３光源部１６から発せられる第３波長は、第１光源部１１から発せられる第１波長と異なる波長を用いる。また、第３光源部１６から発せられる光束は、被検眼１００からの反射光束の偏光方向と逆の偏光光を使用してもよい。これは、ビームスプリッタ１７を被検眼１００の網膜からの反射光束の偏光方向を透過し、逆の偏光方向を反射するような偏光ビームスプリッタを用いることで実現できる。また、ビームスプリッタ１８は、例えば、偏光ビームスプリッタを用いることで被検眼１００からの反射光束と第３光源部１６からの光束を分割できる。なお、ビームスプリッタ１７は、ハーフミラーを用いることもできる。また、第３光源部１６は、被検眼１００の眼底等と共役である。なお、本実施の形態では、被検眼１００の網膜からの反射光束を透過して第１受光部２１Ａに導き、第３光源部１６からの光束を反射して第３受光部２１Ｃに導くようになっているが、反射と透過の関係を逆にし、受光部を入れ替えて測定を行ってもよい。
【００７８】
第３受光光学系２０Ｃは、第３光源部１６から発し、第２補償光学部６０Ｂで反射された光束を受光して第３受光部２１Ｃに導くためのものである。第３受光光学系２０Ｃは、例えば、第３変換部材２２Ｃ（例えば、ハルトマン板）と、第１受光光学系２０Ａと共用されるアフォーカルレンズ及びバリアブルクロスシリンダー及びリレーレンズを備える。第３変換部材２２Ｃは、第２補償光学部６０Ｂで反射された光束を少なくとも１７本の複数のビームに変換するためのレンズ部を有する波面変換部材である。第３変換部材２２Ｃには、光軸と直交する面内に配置された複数のマイクロフレネルレンズを用いることができる。第３光源部１６からの光束は、第２補償光学部６０Ｂ及び第３変換部材２２Ｃを介して第３受光部２１Ｃ上に集光する。第３受光部２１Ｃは、第３変換部材２２Ｃを通過した第３受光光学系２０Ｃからの光を受光し、第３信号を生成するためのものである。第１受光光学系２０Ａと第３受光光学系２０Ｃの光束は、例えば、ビームスプリッタ１８により分けられる。本実施の形態では、被検眼１００の網膜からの反射光束を透過して第１受光部２１Ａに導き、第３光源部１６からの光束を反射して第３受光部２１Ｃに導くようになっているが、反射と透過の関係を逆にし、受光部を入れ替えて測定を行ってもよい。
【００７９】
なお、図１０では、第２補償光学部６０Ｂでの第２補償収差を測定するために光学系が配置されているが、第１補償光学部６０Ａでの補償収差（第１補償収差）を測定するために光学系を配置してもよい。この場合、第３光源部１６は、第１光源部１１と共用することができる。
【００８０】
第４の実施の形態における電気系の構成は、第１の実施の形態における電気系の構成と同様のものを用いることができる。なお、演算部６００は、さらに、第３受光部２１Ｃからの第３信号（１７）を入力し、第３信号（１７）に基づいて第２補償光学部６０Ｂでの補償収差を演算する。また、制御部６１０は、さらに、第３光源部１６に対して信号（１６）を出力する。
【００８１】
図１１は、第４の実施の形態における光学系を用いた収差測定のフローチャートである。図１１に示すフローチャートは、図３に示すフローチャートに、さらに第２補償光学部６０Ｂが実際に補償している収差を測定し、測定した収差を考慮して被検眼１００の光学特性を求めるフローチャートである。
【００８２】
まず、演算部６００は、ステップＳ１０１〜Ｓ１０５、Ｓ１５０の各処理を実行する。処理の詳細は上述と同様であるので省略する。次に、演算部６００は、第２補償収差を測定する（Ｓ４０１）。演算部６００は、第３受光部２１Ｃから第３信号を入力し、入力した第３信号に基づき、第２補償光学部６０Ｂで補償されている第２補償収差を演算する。収差演算については、上述と同様である。演算部６００は、ステップＳ１０７、Ｓ１０９の処理を実行する。処理の詳細は上述と同様であるので省略する。なお、ステップＳ４０１、Ｓ１０７の処理は順序を逆に行っても良いし、並行して行っても良い。
【００８３】
演算部６００は、ステップＳ１０７で測定された収差にステップＳ４０１で測定された第２補償収差を加えて、被検眼１００の収差Ｗを求める（Ｓ４１１）。また、演算部６００は、球面度数等の光学特性を求めても良い。演算の詳細は、図３のステップＳ１１１と同様である。次に、演算部６００は、ステップＳ１１３、Ｓ１１５の処理を実行する。処理の詳細は、上述と同様であるので省略する。なお、補償収差の測定は、光学系を適宜配置し、第１補償光学部６０Ａでの補償収差を測定するようにしてもよい。なお、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。
【００８４】
図１２は、第４の実施の形態における光学系を用いた収差測定のフローチャートの変形例である。図１２に示すフローチャートは、図１１におけるフローチャートの第２補償収差の測定（Ｓ４０１）と、被検眼１００からの反射光束の収差測定２（Ｓ１０７）を並行して行う例である。演算は、複数の演算部を用いて並列演算を行っても良い。各ステップの処理は、図１１と同様であるので、同じ符号を付しその詳細な説明を省略する。
【００８５】
５．第５の実施の形態
図１３は、第５の実施の形態における光学系の構成図である。図１３に示す光学系は、図１０に示す第４の実施の形態における光学系に、さらに、第１補償光学部６０Ａにより補償されている収差（第１補償収差）を測定するための第４測定部２５Ｄを備えた光学系である。また、第４測定部２５Ｄは、第４受光光学系２０Ｄと第４受光部２１Ｄを有する。その他各部については、図１０と同様である。また、図１３には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【００８６】
第４受光光学系２０Ｄは、第１光源部１１から発し、第１補償光学部６０Ａで反射された光束を受光して第４受光部２１Ｄに導くためのものである。第４受光光学系２０Ｄは、第４変換部材２２Ｄ（例えば、ハルトマン板）とレンズを備える。第４変換部材２２Ｄは、第１補償光学部６０Ａで反射された光束を少なくとも１７本の複数のビームに変換するためのレンズ部を有する波面変換部材である。第４変換部材２２Ｄには、光軸と直交する面内に配置された複数のマイクロフレネルレンズを用いることができる。第１光源部１１からの光束は、第１補償光学部６０Ａ、ビームスプリッタ２４、第４変換部材２２Ｄを介して第４受光部２１Ｄ上に集光する。第４受光部２１Ｄは、第４変換部材２２Ｄを通過した第４受光光学系２０Ｄからの光を受光し、第４信号を生成するためのものである。第４受光光学系２０Ｄへの光束と被検眼１００へ送光される光束は、ビームスプリッタ２４により分けられる。もしくは、ビームスプリッタ２４の代わりにミラー部を用いて、このミラー部が動いて光路に挿板されることにより第４受光光学系２０Ｄと被検眼１００へ送光する光束を切り替えることもできる。また、ビームスプリッタ２４は、偏光ビームスプリッタでもよい。
【００８７】
第５の実施の形態における電気系の構成は、第４の実施の形態における電気系の構成と同様のものを用いることができる。なお、演算部６００は、さらに、第４受光部２１Ｃからの第４信号（１８）を入力し、第４信号（１８）に基づいて第１補償光学部６０Ａでの補償収差（第１補償収差）を演算する。
【００８８】
図１４は、第５の実施の形態における光学系を用いた収差測定のフローチャートである。図１４のフローチャートは、図１１に示すフローチャートに、さらに第１補償光学部６０Ａの第１補償収差の測定を行う例である。まず、演算部６００は、ステップＳ１０１〜Ｓ１０５、Ｓ１５０、Ｓ４０１の処理を実行する。処理の詳細は、上述と同様であるので省略する。次に、演算部６００は、第１補償収差を測定する（Ｓ４０３）。演算部６００は、第４受光部２１Ｄから第４信号を入力し、入力した第４信号に基づき第１補償光学部６０Ａで補償されている第１補償収差を演算する。収差演算については、上述と同様である。第４測定部２５Ｄにより測定した、第１補償光学部６０Ａで実際に補償されている第１補償収差は、被検眼１００の眼底上の微小領域を照明しているかどうかを示すものである。演算部６００は、例えば、測定した第１補償収差と第２補償収差に予め定められた許容値以上の差がある場合、その差に応じて第１補償光学部６０Ａ及び第２補償光学部６０Ｂをさらに補償し、差を許容値以下にするようにしてもよい。また、第１受光部２５Ａからの出力により測定された収差に基づく補償量が、第１補償光学部６０Ａに正確に反映されておらず、眼底上で微小領域が形成されていない場合などにより、補償後の収差が許容値より小さくないことがある。その場合には、演算部６００は、後に示す処理によりステップＳ１０５に戻った際に、ステップＳ４０３で測定された第１補償収差に基づき第１補償光学部６０Ａの補償量の再調整を行ってもよい。なお、演算部６００は、例えば第１補償光学部６０Ａへの入力値と測定した第１補償収差を比較し、再調整を行うか判断することができる。なお、ステップＳ４０１とＳ４０３の処理は、逆の順序で行っても良いし、並行して行っても良い。
【００８９】
さらに、演算部６００は、ステップＳ１０７、Ｓ１０９の処理を実行する。処理の詳細は上述と同様であるので省略する。次に、演算部６００は、測定した第２補償収差にステップＳ１０７で測定された収差２を加え、被検眼１００の収差Ｗを求める（Ｓ４０７）。また、演算部６００は、球面度数等の光学特性を求めても良い。演算の詳細は、図３のステップＳ１１１と同様である。次に、演算部６００は、ステップＳ１１３、Ｓ１１５の処理を実行する。処理の詳細は、上述と同様であるので省略する。なお、ステップＳ４０１及びＳ４０３の処理とステップＳ１０７の処理は、逆の順序で行っても良いし、並行して行っても良い。また、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。
【００９０】
６．第６の実施の形態
図１５は、第６の実施の形態における光学系の構成図である。図１５に示す光学系は、図１０に示す第４の実施の形態における光学系の第１測定部２５Ａと、第３測定部２５Ｃを共用させる光学系である。第１光源部１１からの光束と第３光源部１６からの光束を切り替えることにより、被検眼１００からの反射光束と、第３光源部１６から発し第２補償光学部６０Ｂで反射した光束を１つの測定部で受光することができる。例えば、第１光源部１１及び第３光源部１６の点灯・消灯を制御することにより、又は、第１及び第３光源部１１及び１６の前にチョッパー等の光束を遮断する手段を設け、これを制御することにより第１受光光学系２０Ａに入射する光束を切り替えることができる。なお、チョッパー以外にもミラーを光路に挿入するなど、適宜の光束遮断手段を用いても良い。その他各部については、図１０と同様である。また、図１５には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【００９１】
第６の実施の形態における電気系の構成は、第１の実施の形態における電気系の構成と同様のものを用いることができる。なお、制御部６１０は、さらに、第３光源部１６に対して信号（１６）を出力する。
【００９２】
図１６は、第６の実施の形態における光学系を用いた収差測定のフローチャートである。図１６に示すフローチャートは、１つの測定部からの出力に基づき、第２補償収差の測定と、補償後の収差の測定を行う例である。
【００９３】
まず、演算部６００は、第１測定部２５Ａからの出力に基づく被検眼１００の収差測定１を行う（Ｓ３０１）。演算部６００は、例えば、第１光源部１１を点灯、第３光源部１６を消灯することで、被検眼１００で反射した光束が第１受光光学系２０Ａに入射するようにし、第１受光部２１Ａから第１信号を入力する。次に、演算部６００は、入力した第１信号に基づき被検眼１００の収差を求める。収差の演算については、上述と同様である。さらに、演算部６００は、前眼部観察部４０の前眼部像受光部４１からの信号に基づき角膜形状、角膜収差等を求めてもよい。また、演算部６００は、これら計算結果をメモリ８００に記憶する。次に、演算部６００は、ステップＳ１０３、Ｓ１０５、Ｓ１５０の処理を実行する。処理の詳細は上述と同様であるので省略する。
【００９４】
演算部６００は、第１測定部２５Ａからの出力に基づき、第２補償収差を測定する（Ｓ３０６）。演算部６００は、例えば、第１光源部１１を消灯、第３光源部１６を点灯することで、第３光源部１６から発し第２補償光学部６０Ｂで反射した光束が第１受光光学系２０Ａに入射するようにする。さらに、演算部６００は、第１受光部２１Ａから第１信号を入力し、入力した第１信号に基づいて第２補償収差を求める。収差の演算については、上述と同様である。また、演算部６００は、求めた収差をメモリ８００に記憶する。
【００９５】
次に、演算部６００は、第１測定部２５Ａからの出力に基づく被検眼１００の収差測定２を行う（Ｓ３０７）。処理の詳細は、ステップＳ３０１と同様である。なお、上述の処理では、演算部６００は、第１受光光学系２０Ａへ入射する光束を、第１及び第３光源部１１及び１６の点灯・消灯によって切り替えているが、第１及び第３光源部１１及び１６の前にチョッパー等の光束を遮断する手段を設け、これを制御することにより第１受光光学系２０Ａへ入射する光束を切り替えるようにしてもよい。また、ステップＳ３０６とＳ３０７の処理は、順序を逆にしてもよい。以下の処理については図１１と同様であるので省略する。なお、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。
【００９６】
７．第７の実施の形態
図１７は、第７の実施の形態における光学系の構成図である。図１７における光学系は、図１５に示す第６の実施の形態に、さらに第１補償光学部６０Ａで補償されている第１補償収差を測定するための第４測定部２５Ｄを備えた光学系である。第４測定部２５Ｄは、第４受光光学系２０Ｄと第４受光部２１Ｄを有する。第６の実施の形態と同様に、第１光源部１１からの光束と第３光源部１６からの光束を切り替えることにより、被検眼１００からの反射光束と、第３光源部１６から発し第２補償光学部６０Ｂで反射した光束を第１受光光学系２０Ａに導くことができる。その他各部については、図１３と同様である。また、図１７には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【００９７】
第７の実施の形態における電気系の構成は、第６の実施の形態における電気系と同様の構成とすることができる。なお、演算部６００は、さらに、第４受光部２１Ｄからの第４信号（１８）を入力し、第４信号（１８）に基づいて第１補償光学部６０Ａでの補償収差を演算する。
【００９８】
図１８は、第７の実施の形態のおける光学系を用いた収差測定のフローチャートである。図１８は、図１６に示すフローチャートに、さらに第１補償収差を測定する処理を行う例である。各ステップの処理については、図１４、図１６と同様であるので、同じ符号を付し詳細な説明は省略する。なお、ステップＳ３０６とＳ４０３の処理は、並行して行ってもよい。また、ステップＳ３０６及びＳ４０３処理とステップＳ３０７の処理は逆の順序で行ってもよい。さらに、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしてもよい。
【００９９】
８．第８の実施の形態
図１９は、第８の実施の形態における光学系の構成図である。図１９に示す光学系は、図１に示す第１の実施の形態における光学系の第１補償光学部６０Ａと第２補償光学部６０Ｂを共通させる光学系である。第１補償光学部６０Ａは、被検眼１００への入射光と被検眼１００からの反射光の共通光路に挿入される。各部の詳細については図１と同様である。
【０１００】
第８の実施の形態における電気系の構成は、第１の実施の形態における電気系と同様の構成とすることができる。また、第８の実施の形態における光学系を用いた収差測定のフローチャートは、図３及び図５に示す第１の実施の形態におけるフローチャートを用いることができる。
【０１０１】
９．変形例
上述の第４乃至第８の実施の形態における光学系は、さらに短焦点又は低感度測定用の第２測定部２５Ｂを備える変形が可能である。以下、その変形例について述べる。
【０１０２】
（第４の実施の形態の第１変形例）
図２０は、第４の実施の形態の第１変形例における光学系の構成図である。図２０（ａ）に示す光学系は、図１０に示す第４の実施の形態における光学系に、さらに短焦点又は低感度測定用の第２測定部２５Ｂとビームスプリッタ２３を備えた光学系である。第２測定部２５Ｂは、第２受光光学系２０Ｂと第２受光部２１Ｂを有する。第２受光部２１Ｂはビームスプリッタ２３で２つに分割された被検眼１００からの反射光束を受光する。その際、例えば、第３光源部１６は消灯し、第２受光光学系２０Ｂに第３光源部１６からの光束が入射しないようにする。その他にも、第３光源部の前にチョッパーなどの光束を遮断する手段を設けたり、ビームスプリッタを用いて被検眼１００からの光束と第３光源部１６からの光束を分割する等、適宜の方法を用いることができる。その他各部については、図１０と同様である。図２０（ｂ）に示す光学系は、図２０（ａ）に示す第２補償光学部６０Ｂで反射した光束が、第２測定部２５Ｂにも入射するように配置したものである。第２補償光学部６０Ｂを介した光束を第２測定部２５Ｂに導くことにより、補償後の収差を第２測定部２５Ｂでも測定可能となる。また、第２測定部２５Ｂからの出力により測定された収差が予め定められた許容値以下になるまで、第１及び第２補償光学部６０Ａ及び６０Ｂを変形することも可能である。また、図２０（ａ）及び（ｂ）に示す光学系における第１変換部材２２Ａは、長焦点または高感度のレンズ部を有する波面変換部材である。その他各部については、図１０と同様である。なお、図２０（ａ）及び（ｂ）には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【０１０３】
第４の実施の形態の第１変形例における電気系の構成は、第４の実施の形態における電気系と同様の構成とすることができる。なお、演算部６００は、さらに、第２受光部２１Ｂからの第３信号（１１）を入力し、第２信号（１４）に基づいて被検眼１００の収差を演算する。
【０１０４】
図２１は、第４の実施の形態の第１変形例における光学系を用いた収差測定のフローチャートである。図２１に示すフローチャートは、例えば、図１１に示すフローチャートの収差測定１の処理を第２測定部２５Ｂの出力に基づいて行う例である。各ステップの処理は、図８、図１１の処理と同様であるので、同じ符号を付しその詳細な説明を省略する。なお、ステップＳ４０１とＳ２５７の処理は、逆の順序で行っても良いし、並行して行っても良い。また、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。
【０１０５】
（第５の実施の形態の変形例）
図２２は、第５の実施の形態の変形例における光学系の構成図である。図２２（ａ）に示す光学系は、図１３に示す第５の実施の形態の光学系に、さらに短焦点又は低感度測定用の第２測定部２５Ｂとビームスプリッタ２３を備えた光学系である。第２測定部２５Ｂは、第２受光光学系２０Ｂと第２受光部２１Ｂを有する。第２受光部２１Ｂはビームスプリッタ２３で２つに分割された被検眼１００からの反射光束を受光する。第４の実施の形態の第１変形例の場合と同様に、第２受光部２１Ｂで被検眼１００からの反射光束を受光する際には、第２受光光学系２０Ｂに第３光源部１６からの光束が入射しないようにする。その他各部については、図１３と同様である。図２２（ｂ）に示す光学系は、図２２（ａ）に示す第２補償光学部６０Ｂで反射した光束が、第２測定部２５Ｂにも入射するように配置したものである。図２２（ａ）の光学系を短焦点又は低感度測定用の第２測定部２５Ｂに第２補償光学部６０Ｂを介した光束が入射するように変形したものである。また、図２２（ａ）及び（ｂ）に示す光学系における第１変換部材２２Ａは、長焦点または高感度のレンズ部を有する波面変換部材である。その他各部については、図１３と同様である。なお、図２２（ａ）及び（ｂ）には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【０１０６】
第５の実施の形態の変形例における電気系の構成は、第５の実施の形態における電気系と同様の構成とすることができる。なお、演算部６００は、さらに、第２受光部２１Ｂからの第２信号（１４）を入力し、第２信号（１４）に基づいて被検眼１００の収差を演算する。
【０１０７】
図２３は、第５の実施の形態の変形例における光学系を用いた収差測定のフローチャートである。図２３に示すフローチャートは、例えば、図１４に示すフローチャートの収差測定１の処理を第２測定部２５Ｂの出力に基づいて行う例である。各ステップの処理は図８、図１４と同様であるので、同じ符号を付し詳細な説明を省略する。なお、ステップＳ４０１とＳ４０３の処理は、逆の順序で行っても良いし、並行して行っても良い。また、ステップＳ４０１及びＳ４０３の処理とＳ２５７の処理は、逆の順序で行っても良いし、並行して行っても良い。さらに、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。
【０１０８】
（第６の実施の形態の第１変形例）
図２４は、第６の実施の形態の第１変形例における光学系の構成図である。図２４（ａ）に示す光学系は、図１５に示す第６の実施の形態の光学系に、さらに短焦点又は低感度測定用の第２測定部２５Ｂとビームスプリッタ２３を備えた光学系である。第２測定部２５Ｂは、第２受光光学系２０Ｂと第２受光部２１Ｂを有する。図２４（ｂ）に示す光学系は、図２４（ａ）に示す第２補償光学部６０Ｂで反射した光束が、第２測定部２５Ｂにも入射するように配置したものである。また、図２４（ａ）及び（ｂ）に示す光学系における第１変換部材２２Ａは、長焦点または高感度のレンズ部を有する波面変換部材である。その他各部については、図１５と同様である。なお、図２４（ａ）及び（ｂ）には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【０１０９】
第６の実施の形態の第１変形例における電気系の構成は、第６の実施の形態における電気系と同様の構成とすることができる。なお、演算部６００は、さらに、第２受光部２１Ｂからの第３信号（１４）を入力し、第２信号（１４）に基づいて被検眼１００の収差を演算する。
【０１１０】
図２５は、第６の実施の形態の第１変形例における光学系を用いた収差測定のフローチャートである。図２５に示すフローチャートは、例えば、図１６に示すフローチャートの収差測定１の処理を第２測定部２５Ｂの出力に基づいて行う例である。
【０１１１】
まず、演算部６００は、第２測定部２５Ｂに被検眼１００からの反射光束を入射させ、第２測定部２５Ｂの出力から被検眼１００の収差を求める（Ｓ３０２）。演算部６００は、例えば、第１光源部１１を点灯、第３光源部１６を消灯することで、被検眼１００で反射した光束が第２受光光学系２０Ａに入射するようにし、第２受光部２１Ａから第２信号を入力する。次に、演算部６００は、入力した第２信号に基づき被検眼１００の粗い収差を求める。収差の演算については、上述と同様である。さらに、演算部６００は、前眼部観察部４０の前眼部像受光部４１からの信号に基づき角膜形状、角膜収差等を求めてもよい。また、演算部６００は、これら計算結果をメモリ８００に記憶する。以下の、各ステップの処理は、図１６と同様であるので、同じ符号を付し詳細な説明は省略する。なお、ステップＳ３０６とＳ３０７の処理は、逆の順序で行っても良い。また、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。なお、図２４（ｂ）に示す光学系を用いる場合、ステップＳ３０６の処理は、第２測定部２５Ｂの出力に基づいて行っても良い。
【０１１２】
（第７の実施の形態の変形例）
図２６は、第７の実施の形態の変形例における光学系の構成図である。図２６（ａ）に示す光学系は、図１７に示す第７の実施の形態における光学系に、さらに短焦点又は低感度測定用の第２測定部２５Ｂとビームスプリッタ２３を備えた光学系である。第２測定部２５Ｂは、第２受光光学系２０Ｂと第２受光部２１Ｂを有する。図２６（ｂ）に示す光学系は、図２６（ａ）に示す第２補償光学部６０Ｂで反射した光束が、第２測定部２５Ｂにも入射するように配置したものである。また、図２６（ａ）及び（ｂ）に示す光学系における第１変換部材２２Ａは、長焦点または高感度のレンズ部を有する波面変換部材である。その他各部については、図１７と同様である。なお、図２６（ａ）及び（ｂ）には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【０１１３】
第７の実施の形態の変形例における電気系の構成は、第７の実施の形態における電気系と同様の構成とすることができる。なお、演算部６００は、さらに、第２受光部２１Ｂからの第３信号（１４）を入力し、第２信号（１４）に基づいて被検眼１００の収差を演算する。
【０１１４】
図２７は、第７の実施の形態の変形例における光学系を用いた収差測定のフローチャートである。図２７に示すフローチャートは、例えば、図１８に示すフローチャートの収差測定１の処理を第２測定部２５Ｂの出力に基づいて行う例である。各ステップの処理は、図１８、図２５と同様であるので、同じ符号を付し詳細な説明は省略する。なお、ステップＳ３０６とＳ４０３の処理は、逆の順序で行っても良い。また、ステップＳ３０６及びＳ４０３の処理とステップＳ３０７の処理は、逆の順序で行っても良い。さらに、図６に示す変形例のように、補償後の収差測定毎に、被検眼１００の収差演算及び演算結果の出力を行うようにしても良い。
【０１１５】
（第８の実施の形態の変形例）
図２８は、第８の実施の形態の変形例における光学系の構成図である。図２８に示す光学系は、図１９に示す第８の実施の形態における光学系に、さらに短焦点又は低感度測定用の第２測定部２５Ｂとビームスプリッタ２３を備えた光学系である。第２測定部２５Ｂは、第２受光光学系２０Ｂと第２受光部２１Ｂを有する。また、図２８に示す光学系における第１変換部材２２Ａは、長焦点または高感度のレンズ部を有する波面変換部材である。その他各部については、図１７と同様である。なお、図２８には、図１の点線の枠内のみを示しているが、それ以外の部分については、図１と同様である。
【０１１６】
第８の実施の形態の変形例における電気系の構成は、第８の実施の形態と同様の構成とすることができる。なお、演算部６００は、さらに、第２受光部２１Ｂからの第３信号（１４）を入力し、第２信号（１４）に基づいて被検眼１００の収差を演算する。また、第８の実施の形態の変形例における光学系を用いた収差測定のフローチャートは、図８に示すフローチャートを用いることができる。
【０１１７】
また、各実施の形態における光学系は、第１補償光学部６０Ａと第２補償光学部６０Ｂを共通させる変形が可能である。以下、その変形例について述べる。
【０１１８】
（第４の実施の形態の第２変形例）
図２９は、第４の実施の形態の第２変形例における光学系の構成図である。図２９に示す光学系は、図１０に示す第４の実施の形態における光学系の第１補償光学部６０Ａ及び第２補償光学部６０Ｂを共通させる例である。第１補償光学部６０Ａは、被検眼１００への入射光と被検眼１００からの反射光の共通光路に挿入される。第３受光部２１Ｃは、第１補償光学部６０Ａで反射し、ビームスプリッタ６５によって分けられた第１光源部１１からの光束を受光する。なお、図２９に示す光学系では、一例として、補償収差の測定用の光束は、第３光源部１６からの光束を用いる変わりに第１光源部１１からの光束の一部を用いている。なお、第４の実施の形態と同様に、補償収差測定用の第３光源部１６を適宜配置してもよい。
【０１１９】
演算部６００は、第３測定部２５Ｃからの出力に基づき、第１補償収差を測定する。ビームスプリッタ６５は、第１光源部１１からの光束を被検眼１００と第３測定部２５Ｃへ分けるビームスプリッタである。また、ビームスプリッタ６５は、被検眼１００から反射して戻ってくる光束を反射するようなビームスプリッタでもある。例えば、ビームスプリッタ６５は、ある一定の比率（例えば、９：１）で反射及び透過するビームスプリッタを用いることができる。また、ビームスプリッタ６５は、ハーフミラーを用いてもよい。その他各部については、図１０と同様である。なお、図２９には、光学系の一部のみを示しているが、それ以外の部分については、図１９と同様である。また、第５の実施の形態における光学系の第１補償光学部６０Ａ及び第２補償光学部６０Ｂを共通させる変形をした場合も、図２９に示す光学系と同様となる。
【０１２０】
第４の実施の形態の第２変形例における電気系の構成は、第４の実施の形態と同様の構成とすることができる。また、第４の実施の形態の第２変形例における光学系を用いた収差測定のフローチャートは、図１１及び図１２に示すフローチャートを用いることができる。
【０１２１】
（第４の実施の形態の第３変形例）
図３０は、第４の実施の形態の第３変形例における光学系の構成図である。図３０に示す光学系は、図２９に示す第４の実施の形態の第２変形例における光学系に、さらに短焦点又は低感度測定用の第２測定部２５Ｂとビームスプリッタ２３を備えた例である。各部の構成は、図２８及び図２９と同様である。また、図３０には、光学系の一部のみを示しているが、それ以外の部分については、図１９と同様である。
【０１２２】
第４の実施の形態の第３変形例における電気系の構成は、第２の実施の形態における電気系と同様の構成とすることができる。また、第４の実施の形態の第３変形例における光学系を用いた収差測定のフローチャートは、図２１に示すフローチャートを用いることができる。
【０１２３】
（第６の実施の形態の第２変形例）
図３１は、第６の実施の形態の第２変形例における光学系の構成図である。図３１に示す光学系は、図１５に示す第６の実施の形態における光学系の第１補償光学部６０Ａと第２補償光学部６０Ｂを共通させる例である。第１補償光学部６０Ａは、被検眼１００への入射光と被検眼１００からの反射光の共通光路に挿入される。第１光源部１１からの光束の一部は、第１補償光学部６０Ａ及びビームスプリッタ６５を介して被検眼１００へ送光される。また、第１光源部１１からの光束の一部は、第１補償光学部６０Ａを介してビームスプリッタ６５を通過し、補償収差測定用の光束として第１測定部２５Ｃに導かれる。被検眼１００からの反射光束は、ビームスプリッタ６５、第１補償光学部６０Ａを介して、ビームスプリッタ６４で反射され、第１測定部２５Ａに導かれる。ビームスプリッタ６４は、例えば、第１光源部１１からの光束を透過し、被検眼１００からの反射光束を反射する偏光ビームスプリッタである。第１測定部２５Ｃに入射する被検眼１００からの反射光束及び補償収差測定用の光束を切り替えることにより、１つの測定部での測定が可能となる。例えば、光路上、ビームスプリッタ６４の前にチョッパーを設け、これを制御することにより、光束を切り替えることができる。なお、チョッパーの配置は、適宜の場所に配置することができる。また、光束の切替手段はチョッパーの挿入以外にも適宜の手段を用いてもよい。その他各部については、図１５と同様である。なお、図３１には、光学系の一部のみを示しているが、それ以外の部分については、図１９と同様である。また、第７の実施の形態における光学系の第１補償光学部６０Ａ及び第２補償光学部６０Ｂを共通させる変形をした場合も、図３１に示す光学系と同様となる。
【０１２４】
第６の実施の形態の第２変形例における電気系の構成は、第６の実施の形態と同様の構成とすることができる。また、第６の実施の形態の第２変形例における光学系を用いた収差測定のフローチャートは、図１６に示すフローチャートを用いることができる。ただし、第１測定部２５Ｃに入射する被検眼１００からの反射光束及び補償収差測定用の光束は、光源の点灯・消灯ではなく、光路上に設けられたチョッパー等を制御することにより切り替える。また、補償収差測定用の光源部を設け、この光源部と第１光源部１１を点灯・消灯することにより、第１測定部２５Ａへの光束を切り替えることができる。
【０１２５】
（第６の実施の形態の第３変形例）
図３２は、第６の実施の形態の第３変形例における光学系の構成図である。図３２に示す光学系は、図３１に示す第６の実施の形態の第２変形例の光学系に、さらに短焦点又は低感度測定用の第２測定部２５Ｂとビームスプリッタ２３を備えた例である。各部の構成は、図２８及び図３１と同様である。また、図３２には、光学系の一部のみを示しているが、それ以外の部分については、図１９と同様である。
【０１２６】
第６の実施の形態の第３変形例における電気系の構成は、第４の実施の形態における電気系と同様の構成とすることができる。また、第６の実施の形態の第３変形例における光学系を用いた収差測定のフローチャートは、図２５に示すフローチャートを用いることができる。
【０１２７】
【発明の効果】
本発明によると、収差量が多い場合においても正確な測定が可能な、精密かつ測定レンジの広い眼特性測定装置を提供することができる。本発明によると、被検眼１００への照明を適切な照明状態で行うことができる。また、本発明によると、被検眼１００の光学特性を測定する場合に、収差を打ち消すような補償を行い、さらに補償後の収差量を測定することで、精密な測定を行う眼特性測定装置を提供するができる。本発明によると、測定光の収差を打ち消すような補正をし、さらに低感度と高感度の光学系を用いてより精密に、且つ、より高速に光学特性の測定を行う眼特性測定装置を提供することができる。さらに、本発明によると、収差を打ち消すための入力値と、実際に補償されている収差にずれがあることを考慮し、より正確な測定を行うことができる。
【図面の簡単な説明】
【図１】第１の実施の形態における光学系の構成図。
【図２】第１の実施の形態における電気系の構成図。
【図３】第１の実施の形態における光学系を用いた収差測定のフローチャート。
【図４】収差測定１以外による収差補償処理のフローチャート。
【図５】座標関係の説明図。
【図６】第１の実施の形態における光学系を用いた収差測定のフローチャートの変形例。
【図７】第２の実施の形態における光学系の構成図。
【図８】第２の実施の形態における光学系を用いた収差測定のフローチャート。
【図９】第３の実施の形態における光学系の構成図。
【図１０】第４の実施の形態における光学系の構成図。
【図１１】第４の実施の形態における光学系を用いた収差測定のフローチャート。
【図１２】第４の実施の形態における光学系を用いた収差測定のフローチャートの変形例。
【図１３】第５の実施の形態における光学系の構成図。
【図１４】第５の実施の形態における光学系を用いた収差測定のフローチャート。
【図１５】第６の実施の形態における光学系の構成図。
【図１６】第６の実施の形態における光学系を用いた収差測定のフローチャート。
【図１７】第７の実施の形態における光学系の構成図。
【図１８】第７の実施の形態のおける光学系を用いた収差測定のフローチャート。
【図１９】第８の実施の形態における光学系の構成図。
【図２０】第４の実施の形態の第１変形例における光学系の構成図。
【図２１】第４の実施の形態の第１変形例における光学系を用いた収差測定のフローチャート。
【図２２】第５の実施の形態の変形例における光学系の構成図。
【図２３】第５の実施の形態の変形例における光学系を用いた収差測定のフローチャート。
【図２４】第６の実施の形態の第１変形例における光学系の構成図。
【図２５】第６の実施の形態の第１変形例における光学系を用いた収差測定のフローチャート。
【図２６】第７の実施の形態の変形例における光学系の構成図。
【図２７】第７の実施の形態の変形例における光学系を用いた収差測定のフローチャート。
【図２８】第８の実施の形態の変形例における光学系の構成図。
【図２９】第４の実施の形態の第２変形例における光学系の構成図。
【図３０】第４の実施の形態の第３変形例における光学系の構成図。
【図３１】第６の実施の形態の第２変形例における光学系の構成図。
【図３２】第６の実施の形態の第３変形例における光学系の構成図。
【図３３】ゼルニケ多項式（１）。
【図３４】ゼルニケ多項式（２）。
【符号の説明】
１０ 第１照明光学系
１１ 第１光源部
１６ 第３光源部
２０Ａ 第１受光光学系
２１Ａ 第１受光部
２５Ａ 第１測定部
２５Ｂ 第２測定部
２５Ｃ 第３測定部
２５Ｄ 第４測定部
３０ 前眼部観察部
３１ 第２光源部
４０ 前眼部照明部
４１ 前眼部像受光部
５０ 第１調整光学部
６０Ａ 第１補償光学部
６０Ｂ 第２補償光学部
７０ 第２調整光学部
９０ 視標光学部
６００ 演算部
６１０ 制御部
６５０ 入力部
７００ 表示部
８００ メモリ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an eye characteristic measuring device, and more particularly to an eye characteristic measuring device that precisely measures optical characteristics of an eye to be inspected using a wavefront sensor.
[0002]
[Prior art]
2. Description of the Related Art In recent years, optical devices used for medical use have become widespread, particularly in ophthalmology, as optical characteristics measuring devices for examining eye functions such as refraction and accommodation of eyes and the inside of an eyeball. For example, there is a device called a photo-refractometer that determines the refractive power and the corneal shape of the eye to be examined.
[0003]
In addition, a retinal image resolution improving device that corrects a wave aberration by deforming a correction optical member such as a deformable mirror and has a half width but the same shape as the wave aberration is disclosed. (For example, see Patent Document 1). In this device, the laser light reflected from the retina of the eye forms a wavefront on a Hartmann-Shack wavefront sensor via a deformable mirror. The formed wavefront is digitized by a digital processor via a camera, and the wave aberration is measured. The digital data processor emits a correction signal that feeds back to the deformable mirror based on the measured wave aberration. The deformable mirror is deformed to correct the wave aberration of the eye, and has the same shape, although the width of the wave aberration is half.
[Patent Document 1]
JP 2001-507258 A
[0004]
[Problems to be solved by the invention]
However, in an apparatus for measuring the optical characteristics of an eye to be examined having an aberration, accurate measurement may be difficult when the amount of aberration is large. In particular, when there is a large amount of aberration, the secondary light source formed by condensing incident light on the fundus may be deteriorated in the state of light collection due to the influence of aberration, and the secondary light source may be blurred and spread. In a double-pass measurement using a wide (large diameter) beam, there is a case where the measurement is easily affected by aberration and cannot be performed.
[0005]
In view of the above points, an object of the present invention is to provide an eye characteristic measuring device having a wide measurement range that enables accurate measurement even when the amount of aberration is large. Another object of the present invention is to illuminate the subject's eye in an appropriate illumination state. Further, another object of the present invention is to perform compensation for canceling aberration with respect to light incident on the eye to be examined, and to remove the influence of aberration in the incident light. An object of the present invention is to provide an eye characteristic measuring apparatus that performs compensation for canceling out aberration of measurement light when measuring optical characteristics of an eye to be examined, further measures the amount of aberration after compensation, and performs precise measurement. With the goal. The present invention provides an eye characteristic measuring apparatus that performs correction so as to cancel out the aberration of the measurement light, and more precisely and uses a low-sensitivity and high-sensitivity optical system to measure optical characteristics more quickly. The purpose is to: A further object of the present invention is to perform more accurate measurement in consideration of a difference between an input value for canceling aberration and an aberration that is actually corrected.
[0006]
[Means for Solving the Problems]
According to a first solution of the present invention,
A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A second part for receiving a part of the reflected light beam reflected from the retina to be examined through a first conversion member having a long focal point or a highly sensitive lens part that converts at least substantially 17 beams. One light receiving optical system,
A second part for receiving light via a second conversion member having a short focus or low sensitivity lens unit that converts a part of the reflected light flux reflected from the retina of the subject's eye and returned to at least substantially 17 beams. Two light receiving optical systems,
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A second light receiving unit that receives a light beam received by the second light receiving optical system;
A compensation amount calculation unit that determines the optical characteristics of the subject's eye based on the output of the first light receiving unit and / or the second light receiving unit, calculates and outputs a compensation amount for canceling the aberration according to the optical characteristics,
A compensating optical unit that performs aberration compensation on both the illumination light beam from the first illumination optical system and the reflected light beam from the retina of the subject's eye, according to the compensation amount output from the compensation amount calculation unit;
Measurement operation for obtaining the optical characteristics of the eye to be examined based on the optical characteristics based on the output of the first light receiving unit and / or the second light receiving unit after the compensation by the compensation optical unit and the optical characteristics compensated by the compensation optical unit. Department and
An eye characteristic measuring device provided with:
[0007]
According to a second solution of the present invention,
A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A first light receiving optical system for receiving a part of the reflected light flux reflected from the retina to be examined and returned via at least substantially a first conversion member that converts the light into 17 beams;
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A second light source unit that emits a light beam of a second wavelength;
An anterior segment illuminating unit that illuminates the vicinity of the cornea of the eye to be examined in a predetermined pattern with a light beam from the second light source unit;
An anterior ocular segment observation unit for receiving a reflected light flux that is reflected and returned from near the cornea of the eye to be examined,
An anterior ocular segment image light receiving unit that receives a light beam received by the anterior ocular segment observation unit,
A compensation amount calculation unit that determines the optical characteristics of the subject's eye based on the output of the anterior ocular segment image light receiving unit, calculates and outputs a compensation amount for canceling aberrations according to the optical characteristics,
A compensating optical unit that performs aberration compensation on both the illumination light beam from the first illumination optical system and the reflected light beam from the retina of the subject's eye, according to the compensation amount output from the compensation amount calculation unit;
An optical characteristic based on the output of the first light receiving unit after compensation by the compensation optical unit, and a measurement calculation unit that determines the optical characteristic of the eye to be examined based on the optical characteristic compensated by the compensation optical unit.
An eye characteristic measuring device comprising:
[0008]
According to a third solution of the present invention,
A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A first light receiving optical system for receiving, via a first conversion member having a lens unit that converts a part of the reflected light flux reflected from the retina to be examined and returned to at least substantially 17 beams,
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A compensation amount calculation unit that determines an optical characteristic of the eye to be inspected based on an output of the first light receiving unit, and calculates and outputs a compensation amount for canceling aberration according to the optical characteristic;
A compensating optical unit that performs aberration compensation on both the illumination light beam from the first illumination optical system and the reflected light beam from the retina of the subject's eye, according to the compensation amount output from the compensation amount calculation unit;
A third light source unit that emits a light beam for illuminating the adaptive optics unit;
A third light receiving optical system for receiving a light beam from the third light source unit via the compensation optical unit and a third conversion member that converts the light beam into at least substantially 17 beams;
A third light receiving unit that receives a light beam received by the third light receiving optical system;
The optical characteristics based on the output of the first light receiving unit after the compensation by the compensating optical unit, and the optical characteristics compensated by the compensating optical unit based on the output of the third light receiving unit are measured. A measurement calculation unit for determining the optical characteristics of the subject's eye based on
An eye characteristic measuring device provided with:
[0009]
According to a fourth solution of the present invention,
A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A third light source unit that emits a light beam for measuring the compensated aberration,
A part of the reflected light beam reflected from the retina of the eye to be examined and the light beam from the third light source unit are received via a first conversion member having a lens unit that converts the light beam into at least substantially 17 beams. A first light receiving optical system for
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A compensation amount calculation unit that determines an optical characteristic of the eye to be inspected based on an output of the first light receiving unit, and calculates and outputs a compensation amount for canceling aberration according to the optical characteristic;
Compensation optics for compensating aberration for the illumination light beam from the first illumination optical system, the reflected light beam from the retina of the eye to be examined, and the light beam from the third light source unit according to the compensation amount output from the compensation amount calculation unit. Department and
An optical characteristic compensated by the compensation optical unit is measured based on an output of the first light receiving unit by a light beam from the third light source unit, and an output of the first light receiving unit by a light beam from the first light source unit is measured. Based on the measured optical characteristics after compensation by the compensation optical unit, a measurement calculation unit that determines the optical characteristics of the eye to be examined based on the measured optical characteristics
An eye characteristic measuring device provided with:
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
1. First embodiment
(Optical system configuration)
FIG. 1 shows a configuration diagram of an optical system according to the first embodiment.
The eye characteristic measuring device includes a first illumination optical system 10, a first light source unit 11, a first measurement unit 25A, an anterior eye illumination unit 30, an anterior eye observation unit 40, and a first adjustment optical unit 50. , A first compensation optical unit 60A, a second compensation optical unit 60B, a second adjustment optical unit 70, and a target optical unit 90. The first measuring unit 25A has a first light receiving optical system 20A and a first light receiving unit 21A. In addition, as for the subject's eye 100, the retina (the fundus) and the cornea (the anterior segment) are shown.
[0011]
Hereinafter, each part will be described in detail.
The first illumination optical system 10 illuminates a minute area on the fundus of the subject's eye 100 with a light beam from the first light source unit 11. The first illumination optical system 10 includes, for example, a condenser lens, a pair of positive and negative cylinder lenses (so-called variable cross cylinder), and a relay lens. The variable cross cylinder may not be provided.
[0012]
The first light source unit 11 emits a light beam of a first wavelength. It is desirable that the first light source unit 11 has high spatial coherence and not high temporal coherence. Here, as an example, an SLD (super luminescence diode) is adopted as the first light source unit 11, and a point light source with high luminance can be obtained. The first light source unit 11 is not limited to the SLD. Even if the first light source unit 11 has a high coherence in space and time, such as a laser, the first light source unit 11 can be used by appropriately reducing the time coherence by inserting a rotary diffuser or the like. it can. Then, even if the coherence is not high in space and time, such as an LED, as long as the light quantity is sufficient, it can be used by inserting a pinhole or the like at the position of the light source in the optical path. Further, as the wavelength of the first light source unit 11 for illumination, for example, a wavelength in an infrared region (for example, 780 nm) can be used.
[0013]
The first light receiving optical system 20A is for receiving, for example, a light beam reflected from the retina of the eye 100 and returning to the first light receiving unit 21A. The first light receiving optical system 20A includes, for example, a first conversion member 22A (for example, a Hartmann plate), an afocal lens, a variable cross cylinder, and a relay lens. The variable cross cylinder may not be provided. The first conversion member 22A is a wavefront conversion member having a lens unit for converting the reflected light beam into at least 17 beams. Note that the first conversion member 22A may be a wavefront conversion member having a long focal point or a highly sensitive lens unit. A plurality of micro Fresnel lenses arranged in a plane orthogonal to the optical axis can be used for the first conversion member 22A. The light reflected from the fundus is focused on the first light receiving unit 21A via the first conversion member 22A. The first light receiving unit 21A receives the light from the first light receiving optical system 20A that has passed through the first conversion member 22A, and generates a first signal. The front focal point of the afocal lens 42 substantially matches the pupil of the eye 100 to be examined.
[0014]
The moving unit 15 integrally moves a portion surrounded by a dotted line in FIG. 1 including the first illumination optical system 10 and the first light receiving optical system 20A. For example, assuming that the light beam from the first light source unit 11 is reflected at a converging point, the relationship in which the signal peak at the first light receiving unit 21A due to the reflected light is maintained at a maximum is maintained at the first light receiving unit 21A. Move in the direction in which the signal peak becomes stronger, and can stop at the position where the intensity becomes maximum. In addition, the first illumination optical system 10 and the first light receiving optical system 20A are moved separately, for example, assuming that the light beam from the first light source unit 11 is reflected at a converging point, and the first light receiving unit due to the reflected light. It is also possible to maintain the relationship where the signal peak at 21A is maximum, move in the direction in which the signal peak at the first light receiving unit 21A is strong, and stop at the position where the strength is maximum.
[0015]
The diameter of incident light from the first light source unit 11 to the subject's eye 100 is adjusted by the stop 12. In the present embodiment, adjustment is performed for so-called double-pass measurement, which illuminates the eye 100 with a wide (large diameter) beam. The double-pass measurement has an advantage that the light amount can be increased, but the incident light is easily affected by aberration when a secondary light source is formed on the fundus, and the secondary light source may spread out. In the present embodiment, the light beam that cancels out the aberration is incident on the subject's eye 100, thereby eliminating the influence of the aberration and enabling the double-path measurement. The aperture 12 may be configured so that the diameter thereof is smaller than the effective range of the Hartmann plate 22A, and so-called single-pass aberration measurement in which eye aberration affects only the light receiving side is established. After the incident light beam emitted from the first light source unit 11 has a common optical path with the measurement light beam diffusely reflected from the fundus, it is paraxially transmitted in the same way as the measurement light beam diffusely reflected from the fundus. I do.
[0016]
The anterior segment illuminating unit 30 includes a second light source unit 31 that emits a light beam of a second wavelength. The luminous flux from the second light source unit 31 uses, for example, a placido ring or a kerat ring to pattern the anterior segment to a predetermined pattern. Irradiate with In the case of kerattling, a pattern only near the center of curvature of the cornea can be obtained from the keratogram. The second wavelength of the light beam emitted from the second light source unit 31 is different from, for example, the first wavelength (here, 780 nm), and a longer wavelength can be selected (for example, 940 nm).
[0017]
The anterior ocular segment observation unit 40 includes, for example, a relay lens, an anterior ocular segment image receiving unit 41 composed of a telecentric aperture and a CCD. The luminous flux reflected from the anterior segment of the subject's eye 100 and returned is observed. Note that the telecentric aperture is an aperture for preventing an anterior ocular segment image from being blurred.
[0018]
The first adjustment optical unit 50 mainly performs, for example, working distance adjustment, and includes a light source unit, a condenser lens, and a light receiving unit. Here, the working distance adjustment is performed, for example, by irradiating a parallel light flux near the optical axis emitted from the light source unit toward the subject's eye 100, and passing the light reflected from the subject's eye 100 through a condenser lens. This is performed by receiving light at the light receiving section via the light receiving section. When the subject's eye 100 is at an appropriate working distance, a spot image from the light source unit is formed on the optical axis of the light receiving unit. On the other hand, when the subject's eye 100 deviates from the proper working distance back and forth, the spot image from the light source unit is formed above or below the optical axis of the light receiving unit. The light receiving unit only needs to be able to detect a change in the light flux position in a plane including the light source unit, the optical axis, and the light receiving unit. For example, a one-dimensional CCD, a position sensing device (PSD), or the like disposed in this plane Can be applied.
[0019]
The first compensating optical unit 60A and the second compensating optical unit 60B are adaptive optical systems (adaptive optics) that compensate for the aberration of the measurement light by being deformed. The first compensation optical unit 60 </ b> A is arranged in the first illumination optical system 10, and reflects, for example, a light beam from the first light source unit 11 and transmits a light beam that compensates for aberration to the subject's eye 100. Further, the second compensation optical system 60B is disposed in the first light receiving optical system 20A, and compensates, for example, the aberration of the reflected light flux reflected and returned from the subject's eye 100. As the first and second compensation optical units 60A and 60B, for example, a variable mirror or a liquid crystal spatial light modulator can be used. In addition, an appropriate optical system that can compensate for the aberration of the measurement light may be used. The deformable mirror changes the reflection direction of the light beam by deforming the mirror by an actuator provided inside the mirror. In addition, there are a method of deforming by capacitance, a method of deforming by piezo, and the like, but any other appropriate method can be used. The liquid crystal spatial light modulator modulates the phase using the light distribution of the liquid crystal, and is used by reflecting it in the same manner as a mirror. Although a polarizer is required in the optical path, the beam splitter 63 plays a role in this embodiment. The beam splitter 63 is configured by a mirror (for example, a polarization beam splitter) that reflects a light beam from the first light source unit 11 and transmits a reflected light beam that is reflected by the retina of the subject's eye 100 and returned. Further, the first compensation optical unit 60A and the second compensation optical unit 60B may use a transmission type optical system other than the one used by reflecting. The first and second compensating optical units 60A and 60B are preferably, but not limited to, made to receive a parallel light beam. For example, when the subject's eye 100 has no aberration, the reflected light flux from the retina of the subject's eye 100 enters the second compensation optical unit 60B as parallel light. Further, for example, the light beam from the first light source unit 11 always enters the first compensation optical unit 60A as parallel light.
[0020]
The beam splitter 61 is composed of, for example, a dichroic mirror that reflects a light beam of the first wavelength and transmits a light beam of the second wavelength. Further, a rotary prism 62 for uniformizing light due to uneven reflection from the fundus is arranged.
[0021]
The second adjustment optical unit 70 is for performing alignment adjustment in the X and Y directions, for example, and includes an alignment light source unit, a lens, and a beam splitter in order to form a bright point at the apex of the cornea.
[0022]
The optotype optical unit 90 includes, for example, a landscape chart of the eye 100 to be inspected, an optical path for projecting an optotype for fixation and fogging, and includes a light source unit (for example, a lamp), a fixation target 92, Equipped with a relay lens. The fixation target 92 can be illuminated to the fundus with a light beam from the light source, and the subject's eye 100 observes the image.
[0023]
(Conjugate relationship)
The fundus of the subject's eye 100, the fixation target 92 of the target optical unit 90, the first light source unit 11, and the first light receiving unit 21A are conjugate. Further, the pupil (iris) of the eye of the subject's eye 100, the rotary prism 62, the first conversion member (Hartmann plate) 22A, the stop 12 on the measurement light incident side of the first illumination optical system 10, the first compensation optical unit 60A, The two compensating optical units 60B are conjugate.
[0024]
(Electric system configuration)
FIG. 2 is a configuration diagram of an electric system according to the first embodiment.
The configuration of the electrical system of the eye characteristic measuring device includes an arithmetic unit 600, a control unit 610, an input unit 650, a display unit 700, a memory 800, a first driving unit 910, a second driving unit 911, A third drive unit 912, a fourth drive unit 913, and a fifth drive unit 914 are provided. The calculation unit 600 includes, for example, a compensation amount calculation unit 601 and a measurement calculation unit 602 that measures various eye characteristics. Further, the input unit 650 includes a pointing device for designating appropriate buttons, icons, positions, areas, and the like displayed on the display unit 700, a keyboard for inputting various data, and the like.
[0025]
In addition, for example, the arithmetic unit 600 includes a first signal (4) from the first light receiving unit 21A, a signal (7) from the anterior eye observation unit 40, and a signal (10) from the first adjustment optical unit 50. ) Is entered.
[0026]
The measurement calculation unit 602 receives the first signal {circle around (4)} from the first light receiving unit 21 </ b> A and the signal {circle over (7)} from the anterior eye observation unit 40, and obtains the optical characteristics of the subject's eye 100. Further, the compensation amount calculation unit 601 calculates the compensation amounts in the first and second compensation optical units 60A and 60B based on, for example, the optical characteristics obtained from the output of the first measurement unit 25A. Note that the compensation amount calculation unit 601 may calculate the compensation amount based on other optical characteristics obtained from the output of the measurement unit or optical characteristic data input from the input unit 650 or the memory 800. The arithmetic unit 600 appropriately outputs signals or other signals / data corresponding to these arithmetic results to the control unit 610 for controlling the electric drive system, the display unit 700, and the memory 800, respectively.
[0027]
The control unit 610 controls turning on and off of the first light source unit 11 and controls the first to fifth driving units 910 to 914 based on a control signal from the arithmetic unit 600. The control unit 610 outputs a signal {circle around (1)} to the first light source unit 11 and outputs a signal {circle around (5)} to the second adjustment optical unit 70 based on a signal corresponding to the calculation result in the calculation unit 600, for example. And outputs a signal {circle around (6)} to the anterior ocular segment illumination unit 30, outputs signals {circle around (8)} and {9} to the first adjusting optical unit 50, and outputs a signal to the optotype optical unit 90. And outputs a signal to the first drive unit 910 to the fifth drive unit 914.
[0028]
The first drive unit 910 outputs a signal (2) based on the signal (4) from the first light receiving unit 21A input to the arithmetic unit 600, and outputs a signal (2) to the variable cross cylinder of the first illumination optical system 10; The variable cross cylinder of the first light receiving optical system 20A is rotated by driving appropriate lens moving means to correct the astigmatic component of the subject's eye. Note that this correction need not be performed.
[0029]
The second driving unit 911 moves the first illumination optical system 10 and the first light receiving optical system 20A in the optical axis direction based on, for example, the light receiving signal {circle around (4)} from the first light receiving unit 21A input to the arithmetic unit 600. The moving unit 15 outputs the signal (3) to the moving unit 15 and drives the lens moving unit of the moving unit 15. By moving the first light receiving optical system 20A and the like in the optical axis direction, it is possible to compensate for the low-order aberration spherical power component.
[0030]
The third driving unit 912 moves the optotype optical unit 90, for example, and outputs a signal (12) to an appropriate moving unit (not shown) and drives the moving unit. The fourth drive unit 913 rotates the rotary prism 62, outputs a signal (13) to an appropriate lens moving unit (not shown), and drives the lens moving unit. The fifth driving unit 914 drives the first and second compensating optical units 60A and 60B. The fifth driving unit 914 calculates the compensation amount calculating unit 602 for the deforming means of the first and second compensating optical units 60A and 60B. A signal (15) is output based on the compensation amount, and the deforming means is driven.
[0031]
(flowchart)
FIGS. 3 and 4 are flowcharts of aberration measurement using the optical system according to the first embodiment. The calculation unit 600 determines the amount of compensation based on the output from the first light receiving unit 21A in the aberration measurement 1, and deflects the first and second compensation optical units 60A and 60B to compensate for the aberration. The optical characteristics of the subject's eye 100 are determined from the aberration and the compensated aberration. If no aberration is obtained from the Hartmann image from the first light receiving unit 21A, for example, compensation is performed based on optical characteristics near the cornea based on the anterior ocular segment image light receiving unit 41 so that aberration measurement can be performed. To
[0032]
First, the calculation unit 600 obtains the aberration of the subject's eye 100 based on the first signal from the first light receiving unit 21A as the aberration measurement 1 (S101). The calculation unit 600 receives the first signal of the Hartmann image from the first light receiving unit 21A of the first measurement unit 25A. Next, the calculation unit 600 calculates the point image movement amounts △ x and △ y of the Hartmann image from the input first signal, calculates the Zernike coefficients based on the point image movement amounts, and calculates the aberration of the eye 100 to be examined. . Further, the calculation unit 600 may obtain a corneal shape, a corneal aberration, and the like based on a signal from the anterior eye image receiving unit 41 of the anterior eye observation unit 40. The arithmetic unit 600 stores these calculation results in the memory 800.
[0033]
Hereinafter, the aberration calculation will be described. The calculation unit 600 calculates the movement amounts Δx and Δy of each point image from the image of the first measurement unit 25A. The movement amount and the aberration W are related by the following partial differential equation.
[0034]
(Equation 1)

(F: distance between the Hartmann plate of the first measurement unit 25A and the CCD)
[0035]
Here, the wavefront W is represented by the Zernike polynomial Z_i ^2j-iWhen expressed by using,
[0036]
(Equation 2)

[0037]
Using the above two equations and the measured values of △ x and △ y (and thus also including X and Y) obtained by the measurement, the Zernike coefficient c_i ^2j-iCan be obtained. Further, when obtaining the corneal aberration, the inclination of the cornea and the height of the cornea are calculated based on the signal from the anterior ocular segment image receiving unit 41 of the anterior ocular segment observation unit 40, and the cornea is treated in the same manner as the optical lens. Optical properties are calculated. FIGS. 33 and 34 are explanatory diagrams (1) and (2) of the Zernike polynomial.
[0038]
Next, the arithmetic part 600 determines whether a measurement result has been obtained (S103). For example, the calculation unit 600 cannot obtain the center of gravity position of each point image of the Hartmann image acquired in the aberration measurement 1 by a predetermined number or more (for example, one third or more), or each point image has large blur (for example, It can be determined according to one or a plurality of predetermined appropriate conditions, such as a predetermined number or more of points which cannot be detected because they cannot be separated from an adjacent spot image or more. Here, when the measurement result is obtained (S103), the operation proceeds to step S105, and when the measurement result is not obtained (S103), the operation proceeds to step S150.
[0039]
In step S105, the calculation unit 600 obtains a compensation amount M in the first and second compensation optical units 60A and 60B that cancels the obtained aberration, and outputs the compensation amount via the control unit 610 and the fifth driving unit 914. A signal (15) corresponding to M is output to distort the first and second compensation optical units 60A and 60B such as a variable mirror (S105). Further, the first and second compensating optical units 60A and 60B are deformed by appropriate deforming means according to the signal (15). The first and second compensating optical units 60A and 60B may use a liquid crystal spatial light modulator other than the variable mirror. By compensating the aberration of the incident light by the first compensation optical unit 60A, an illumination state in which a point light source is formed on the fundus can be achieved even when the amount of aberration of the subject's eye 100 is large. In particular, in a double-pass measurement that is easily affected by aberration, the influence of aberration can be removed. Further, by compensating the aberration of the reflected light beam returning from the eye to be inspected by the second compensation optical unit 60B, it is possible to accurately measure the compensated light beam. Hereinafter, the calculation of the compensation amount M for canceling the aberration will be described.
[0040]
FIG. 5 shows the coordinates (X_m, Y_mFIG. 4 is an explanatory diagram of the relationship between the coordinates (X, Y) of the optical system. The aberration to be compensated is represented by Wc, and the equation of the analyzed aberration is
[0041]
(Equation 3)

[0042]
, The coordinates (X_m, Y_m) And the coordinates (X, Y) of the optical system are determined by considering the incident angle θ to the variable mirror.
[0043]
(Equation 4)

[0044]
Becomes The compensation amount M of the variable mirror takes into account the effect of doubling because of reflection and the magnification of the pupil of the eye and the variable mirror. Assuming that the magnification of the deformable mirror with respect to the pupil is k, the compensation amount M is
[0045]
(Equation 5)

[0046]
Becomes The compensation amount M obtained here can include a high-order component of aberration. The first and second compensation optical units 60A and 60B are deformed based on the compensation amount M output from the calculation unit 600. Note that the magnification k and the angle of incidence θ in the uncompensated state are preset values and are stored in the memory 800 in advance.
[0047]
The spherical power component, which is a low-order component of the aberration, can be compensated by moving the first light receiving unit 25A by the moving unit 15. In addition, the low-order astigmatic component can be compensated by rotating the variable cross cylinder. When the distorted variable mirror is further distorted, the compensation amount M is obtained for the aberration measured after compensation in the same manner as in the above analysis, and the compensation amount M is added to the compensated variable mirror. . Further, instead of completely eliminating aberration by the first and second compensation optical units 60A and 60B, the light incident on the Hartmann plate may be slightly diverged or inclined. Thereby, for example, a highly sensitive measurement can be performed using the first light receiving optical system 20A having the long focus or the highly sensitive first conversion member 22A.
[0048]
In step S150, the arithmetic unit 600 performs an aberration compensation process based on a result other than the measurement result in step S101 (S150), and proceeds to step S107.
[0049]
FIG. 4 is a flowchart of the aberration compensation processing other than the aberration measurement 1. Hereinafter, the processing illustrated in FIG. 4 will be described.
First, the calculation unit 600 determines whether the approximate amount of aberration is known or whether aberration correction is appropriately performed (S151). For example, it is determined whether to continue the measurement with reference to corneal aberration, past aberration data, and the like. As a determination method, the arithmetic unit 600 may input a signal to continue or end the measurement from an automatically displayed dialog box, an input unit 650 started from a menu, or the like. The arithmetic unit 600 may search the memory 800 for corneal aberration data or past aberration data, and determine whether to continue or terminate the measurement based on the presence or absence of the data.
[0050]
When the measurement is not to be continued, the arithmetic unit 600 displays an analysis impossible notification on the display unit 700 (S153), and ends the measurement. On the other hand, when the measurement is continued, the arithmetic unit 600 inputs the corneal aberration data, the Zernike coefficients such as the past aberration data, the aberration data, and the like from the memory 800 in the apparatus or the input unit 650 and the first unit such as the variable mirror. Then, the compensation amount M of the second compensation optical units 60A and 60B is obtained, and the variable mirror is distorted via the control unit 610 and the fifth drive unit 914 (S155). In addition, the arithmetic unit 600 may obtain a corneal aberration by inputting a signal from the anterior ocular segment image light receiving unit 41 of the anterior ocular segment observation unit 40, and calculate the compensation amount M based on the obtained aberration. The calculation of the compensation amount M is the same as in step S105. The arithmetic unit 600 outputs a signal (15) according to the compensation amount M via the control unit 610 and the fifth driving unit 914, and distorts the first and second compensation optical units 60A and 60B. In the present embodiment, when the optical characteristics of the subject's eye cannot be measured from the Hartmann image, the measurement can be performed by compensating the aberration by the first and second compensation optical units 60A and 60B based on the corneal aberration and the like as described above. So that
[0051]
Next, the arithmetic unit 600 determines whether the optical characteristics can be measured after the compensation (S157). The calculation unit 600 receives, for example, a Hartmann image from the first light receiving unit 21A, and the center of gravity of the input Hartmann image cannot be more than a predetermined number (for example, one third), or each point image has a large blur ( For example, the determination can be made in accordance with one or more predetermined conditions such as a predetermined number or more of points that cannot be detected because they cannot be separated from an adjacent spot image because they are not separated from an adjacent spot image. . If the measurement is not possible, the arithmetic unit 600 determines whether to perform further compensation (S159). For example, the arithmetic unit 600 may input a signal for continuing or ending the measurement from an automatically displayed dialog box or an input unit 650 started from a menu. The calculation unit 600 may search the memory 800 to determine whether there is another aberration data. The arithmetic unit 600 returns to step S155 when compensating, or displays an analysis impossible notification on the display unit 700 when not compensating (S161), and ends the measurement.
[0052]
On the other hand, when the measurement can be performed (S157), the arithmetic unit 600 ends the aberration compensation processing.
Returning to FIG. 3, the arithmetic unit 600 acquires the first signal from the first light receiving unit 21 </ b> A as the aberration measurement 2 and obtains the aberration (S <b> 107). The aberration obtained here is the aberration after the compensation, and for example, the first measuring unit 25A can measure the minute aberration with high accuracy. Further, when the corneal aberration is compensated by the first and second compensation optical units 60A and 60B, the aberration obtained here is an intraocular aberration.
[0053]
Next, the calculation unit 600 determines whether the aberration obtained in step S107 is equal to or less than a predetermined allowable value (S109). For example, the calculation unit 600 may determine whether the RMS value of the higher-order aberration is 0.1 or less. The RMS value (mean square error) of the aberration is the Zernike coefficient c_i ^2j-iIs calculated using the following equation.
[0054]
(Equation 6)

[0055]
The calculation unit 600 determines whether one or more of the predetermined RMS values of the aberrations is equal to or less than an allowable value.
[0056]
When the aberration is larger than the allowable value (S109), the calculation unit 600 returns to step S105, and further distorts the first and second compensation optical units 60A and 60B. On the other hand, when the calculated value is smaller than the allowable value (S109), the arithmetic unit 600 adds the aberrations canceled in the first and second compensation optical units 60A and 60B to the aberration measured in step S107, and calculates the actual aberration of the subject's eye. W (Zernike coefficient c_i ^2j-i(S111). The arithmetic unit 600 calculates the Zernike coefficient c_i ^2j-iAnd the arrangement of the optical system (eg, information such as where the moving position comes under the initial conditions), the optics of the spherical power S, the astigmatic power C, the astigmatic axis A, the higher order spherical aberration, etc., using a known method. Properties can be obtained. The arithmetic unit 600 can calculate the spherical power S, the astigmatic power C, and the astigmatic axis A from the second-order terms of the Zernike coefficients as in the following equation.
[0057]
(Equation 7)

(Where, SE: equivalent spherical power, S_move: Spherical power for fixation movement, r: pupil diameter)
[0058]
The calculation unit 600 displays the obtained measurement results such as the aberration map, the aberration coefficient, and the Hartmann image on the display unit 700, and stores the measurement results in the memory 800 (S113). The arithmetic unit 600 may read corneal shape data and the like from the memory 800 and further display the data on the display unit 700.
[0059]
Further, the arithmetic unit 600 determines whether to end the measurement (S115), and returns to step S101 if the measurement is to be continued, and ends the measurement if it is to be ended. For the determination of the measurement end, for example, the arithmetic unit 600 may input a signal to continue or end the measurement from an automatically displayed dialog box, an input unit 650 started from a menu, or the like.
[0060]
FIG. 6 is a modified example of the flowchart of the aberration measurement using the optical system according to the first embodiment. This modified example is an example in which the aberration calculation of the eye 100 to be inspected and the output of the calculation result are performed every aberration measurement after compensation.
[0061]
First, the calculation unit 600 performs the processing of steps S101 to S107 and step S111. Details of the processing are the same as those described above, and a description thereof will be omitted.
[0062]
The calculation unit 600 displays the obtained measurement results such as the aberration map and the aberration coefficient on the display unit 700 and stores the measurement results in the memory 800 (S201). The display on the display unit 700 does not always need to be performed every time. For example, in a case where it takes a long time for the display processing on the display unit 700 to affect the measurement, the result may be displayed every certain number of measurements.
[0063]
The calculation unit 600 determines whether the aberration obtained in step S111 is equal to or smaller than a predetermined allowable value (S109). The criteria can be the same as described above. If the aberration is larger than the permissible value, the operation unit 600 returns to step S105. If the aberration is smaller than the permissible value, the calculation unit 600 displays the obtained aberration map, aberration coefficient, Hartmann image, and other measurement results on the display unit 700, and stores it in the memory 800. It is stored (S203). If the measurement result is already displayed and stored in step S201, the process of step S203 may be omitted. In addition, instead of judging whether the aberration is equal to or less than the allowable value, the arithmetic unit 600 outputs to the display unit 700 a display for instructing whether to further distort the first and second adaptive optics units 60A and 60B. Alternatively, a signal may be input from the input unit 650. Next, arithmetic unit 600 performs the process of step S115. The details of the processing are the same as described above.
[0064]
2. Second embodiment
(Optical system configuration)
FIG. 7 is a configuration diagram of an optical system according to the second embodiment. FIG. 7 shows only the portion corresponding to the dotted frame in FIG. 1, but the other portions are the same as those in FIG. The eye characteristic measuring apparatus in FIG. 7 further includes a short focus or low sensitivity second measuring unit 25B and a beam splitter 23. In addition, the first conversion member 22A in the present embodiment is a wavefront conversion member having a long focal point or a highly sensitive lens unit.
[0065]
The second measuring section 25B has a second light receiving optical system 20B and a second light receiving section 21B. The second light receiving optical system 20B, like the first light receiving optical system 20A, is for receiving the light flux reflected from the retina of the eye 100 and returning to the second light receiving unit 21B. The second light receiving optical system 20B includes, for example, a second conversion member 22B (for example, a Hartmann plate), an afocal lens shared with the first light receiving optical system 20A, a variable cross cylinder, and a relay lens. The second conversion member 22B is a wavefront conversion member having a short focus or low sensitivity lens unit for converting the reflected light beam into at least 17 plural beams. A plurality of micro Fresnel lenses arranged in a plane orthogonal to the optical axis can be used for the second conversion member 22B. The light reflected from the fundus is collected on the second light receiving unit 21B via the second conversion member 22B. The second light receiving unit 21B receives the light from the second light receiving optical system 20B that has passed through the second conversion member 22B, and generates a second signal. The light fluxes of the first measuring unit 25A and the second measuring unit 25B are split by the beam splitter 23. Alternatively, it is also possible to use a mirror unit instead of the beam splitter 23 and switch to the first or second measuring unit 25A or 25B by moving the mirror unit and inserting it into the optical path. Note that the optical system in the above-described second embodiment is configured for double-pass measurement, but can be appropriately changed for single-pass measurement.
[0066]
The short focus and the low sensitivity in the present embodiment mean that the change of the beam converted by the second conversion member 22B over the measurable range is set smaller than the conversion pitch of the second conversion member 22B. As a result, it is easy to associate each spot obtained by the second light receiving unit 21B with a grid point, and signal processing can be easily performed at high speed. On the other hand, in the measurement using a long focus or high sensitivity, the spot position is largely displaced, and a spot may exist outside the range of the Hartmann grating. Therefore, if the spot positions are shifted too much due to a large amount of aberration or the like, it may be difficult to associate each spot with a grid point, and it may take time for signal processing.
[0067]
(Conjugate relationship)
The second light receiving unit 21B is conjugate with the fundus of the eye 100 to be examined. The second conversion member 22B of the second light receiving optical system 20B is conjugate with the pupil (iris) of the subject's eye 100 and the like.
[0068]
(Electric system configuration)
The configuration of the electric system in the second embodiment can be the same as the configuration of the electric system in the first embodiment. The calculation unit 600 further receives the second signal (14) from the second light receiving unit 21B and obtains the optical characteristics of the eye 100 based on the second signal (14).
[0069]
(flowchart)
FIG. 8 is a flowchart of aberration measurement using the optical system according to the second embodiment. FIG. 8 is a flowchart of aberration measurement for determining a compensation amount based on a signal from the short-focus or low-sensitivity second light receiving optical system 20B. The calculation unit 600 obtains the compensation amount M of the first and second compensation optical units 60A and 60B at high speed based on the output from the second measurement unit 25B, and converts the light beam whose aberration has been compensated to a long focus or a high sensitivity. By using the first measuring unit 25A for precise measurement, high-sensitivity and high-speed measurement can be performed.
[0070]
First, the calculation unit 600 performs the aberration measurement 1 based on the signal from the short focus or low sensitivity second measurement unit 25B (S251). The calculation unit 600 acquires the second signal of the Hartmann image from the second light receiving unit 21B of the second measurement unit 25B, and detects the center of gravity of the spot image based on the acquired image. By searching for a barycentric position corresponding to the spot in a rectangular area centered on the barycentric point with no aberration, the correspondence is made so that high speed is possible. The calculation unit 600 obtains a coarse aberration of the subject's eye 100 based on the obtained center of gravity of the spot image.
[0071]
Next, the arithmetic section 600 executes each processing of steps S103, S105, and S150. Details of the processing are the same as those described above, and will not be described.
The calculation unit 600 performs the second aberration measurement based on the signal from the first measurement unit 25A having a long focus or high sensitivity (S257). The calculation unit 600 receives the first signal of the Hartmann image from the first light receiving unit 21A of the first measurement unit 25A. Next, the arithmetic unit 600 obtains a point image movement amount of the Hartmann image from the input first signal, and obtains optical characteristics of the eye to be inspected based on the point image movement amount. In the aberration measurement using the conventional long focal point or high sensitivity measurement unit, the displacement of the spot image may be large, and it may take time to associate the spot image, or the measurement may not be performed due to lack of correspondence. In the present embodiment, since the input first signal of the Hartmann image is a Hartmann image in which the aberration of the subject's eye 100 is canceled out to some extent, even if it has a long focus or high sensitivity, the spot displacement is small. As a result, accurate and high-speed aberration calculation is possible.
[0072]
Next, arithmetic unit 600 performs the processing of steps S109 to S115. Details of the processing are the same as those described above, and will not be described. As in the modification shown in FIG. 6, the aberration calculation of the subject's eye 100 and the output of the calculation result may be performed for each aberration measurement after compensation.
[0073]
3. Third embodiment
FIG. 9 is a configuration diagram of an optical system according to the third embodiment. FIG. 9 shows only the portion corresponding to the dotted frame in FIG. 1, but the other portions are the same as those in FIG. In the optical system of FIG. 9, the second compensation optical unit 60B is inserted commonly to the first and second measurement units 25A and 25B. The light flux reflected from the retina of the subject's eye 100 and returned is guided to the first and second measurement units 25A and 25B via the second compensation optical unit 60B. By guiding the light beam passing through the second compensation optical unit 60B to the second measurement unit 25B, the aberration after compensation can be measured by the second measurement unit 25B. Further, the first and second adaptive optics units 60A and 60B can be modified until the aberration measured by the output from the second measuring unit 25B becomes equal to or less than a predetermined allowable value. The first conversion member 22A of the optical system according to the third embodiment is a wavefront conversion member having a long focal point or a highly sensitive lens unit. Note that the optical system in the third embodiment described above is configured for double-pass measurement, but can be appropriately changed for single-pass measurement.
[0074]
The configuration of the electric system according to the third embodiment can be the same as that of the electric system according to the second embodiment. As a flowchart of the aberration measurement using the optical system according to the third embodiment, the flowchart shown in FIG. 8 can be used.
[0075]
4. Fourth embodiment
In the present embodiment, the aberration (compensation aberration) actually compensated by the first and second compensation optical units 60A and 60B is further measured, and the measured compensation aberration and the reflected light flux from the eye to be inspected after compensation are measured. In this embodiment, the optical characteristics of the eye 100 to be inspected are obtained based on the aberration. For example, when there is an error between the input value at the adaptive optics unit and the actual compensation aberration, more accurate measurement is possible.
[0076]
FIG. 10 is a configuration diagram of an optical system according to the fourth embodiment. The optical system shown in FIG. 10 is obtained by further arranging an optical system for measuring the compensation aberration in the optical system in the first embodiment shown in FIG. 1, and includes a third light source unit 16 and beam splitters 17 and 18. And a third measuring unit 25C. The third measuring unit 25C has a third light receiving optical system 20C and a third light receiving unit 21C. Other components are the same as those in FIG. Also, FIG. 10 shows only the area within the dotted line in FIG. 1, but the other parts are the same as in FIG.
[0077]
The third light source unit 16 emits a light beam of a third wavelength. The light beam emitted from the third light source unit 16 is used, for example, to measure the aberration (second compensation aberration) compensated by the second compensation optical unit 60B. The light beam from the third light source unit 16 is reflected by the beam splitter 17 via the lens, and irradiates the second compensation optical unit 60B. For example, the light beam from the third light source unit 16 always enters the second compensation optical unit 60B as parallel light. The light beam having an aberration by being reflected or transmitted by the second compensation optical unit 60B is reflected by the beam splitter 18, received by the third light receiving optical system 20C, and its aberration is measured. As the beam splitters 17 and 18, for example, a dichroic mirror that transmits a light beam of the first wavelength emitted from the first light source unit 11 and reflects a light beam of the third wavelength emitted from the third light source unit 16 can be used. In this case, a wavelength different from the first wavelength emitted from the first light source unit 11 is used as the third wavelength emitted from the third light source unit 16. Further, as the light beam emitted from the third light source unit 16, a polarized light that is reverse to the polarization direction of the reflected light beam from the eye 100 may be used. This can be realized by using the beam splitter 17 as a polarizing beam splitter that transmits the polarization direction of the light beam reflected from the retina of the eye 100 and reflects the opposite polarization direction. The beam splitter 18 can split the reflected light beam from the subject's eye 100 and the light beam from the third light source unit 16 by using, for example, a polarizing beam splitter. Note that a half mirror can be used as the beam splitter 17. The third light source unit 16 is conjugate with the fundus of the eye 100 to be examined. In the present embodiment, the light beam reflected from the retina of the eye 100 to be examined is transmitted to the first light receiving unit 21A, and the light beam from the third light source unit 16 is reflected and guided to the third light receiving unit 21C. However, the relationship between the reflection and the transmission may be reversed, and the measurement may be performed by replacing the light receiving unit.
[0078]
The third light receiving optical system 20C is for receiving a light beam emitted from the third light source unit 16 and reflected by the second compensation optical unit 60B, and guiding the light beam to the third light receiving unit 21C. The third light receiving optical system 20C includes, for example, a third conversion member 22C (for example, a Hartmann plate), an afocal lens shared with the first light receiving optical system 20A, a variable cross cylinder, and a relay lens. The third conversion member 22C is a wavefront conversion member having a lens unit for converting the light beam reflected by the second compensation optical unit 60B into at least 17 plural beams. As the third conversion member 22C, a plurality of micro Fresnel lenses arranged in a plane orthogonal to the optical axis can be used. The light beam from the third light source unit 16 is focused on the third light receiving unit 21C via the second compensation optical unit 60B and the third conversion member 22C. The third light receiving section 21C receives the light from the third light receiving optical system 20C that has passed through the third conversion member 22C, and generates a third signal. The light beams of the first light receiving optical system 20A and the third light receiving optical system 20C are split by the beam splitter 18, for example. In the present embodiment, the light beam reflected from the retina of the subject's eye 100 is transmitted and guided to the first light receiving unit 21A, and the light beam from the third light source unit 16 is reflected and guided to the third light receiving unit 21C. However, the relationship between the reflection and the transmission may be reversed, and the measurement may be performed by replacing the light receiving unit.
[0079]
In FIG. 10, an optical system is arranged to measure the second compensation aberration in the second compensation optical unit 60B, but the compensation aberration (first compensation aberration) in the first compensation optical unit 60A is measured. For this purpose, an optical system may be provided. In this case, the third light source unit 16 can be shared with the first light source unit 11.
[0080]
The configuration of the electric system according to the fourth embodiment can be the same as the configuration of the electric system according to the first embodiment. The calculation unit 600 further receives the third signal (17) from the third light receiving unit 21C, and calculates the compensation aberration in the second compensation optical unit 60B based on the third signal (17). The control unit 610 further outputs a signal (16) to the third light source unit 16.
[0081]
FIG. 11 is a flowchart of aberration measurement using the optical system according to the fourth embodiment. The flowchart illustrated in FIG. 11 is a flowchart in which, in addition to the flowchart illustrated in FIG. 3, the aberration actually compensated by the second compensation optical unit 60B is measured, and the optical characteristics of the eye 100 to be inspected are determined in consideration of the measured aberration. is there.
[0082]
First, the calculation unit 600 executes each processing of steps S101 to S105 and S150. Details of the processing are the same as those described above, and will not be described. Next, the calculation unit 600 measures the second compensation aberration (S401). The calculation section 600 receives the third signal from the third light receiving section 21C, and calculates the second compensation aberration compensated by the second compensation optical section 60B based on the inputted third signal. The aberration calculation is the same as described above. The calculation unit 600 performs the processing of steps S107 and S109. Details of the processing are the same as those described above, and will not be described. The processing of steps S401 and S107 may be performed in reverse order or may be performed in parallel.
[0083]
The calculation unit 600 obtains the aberration W of the subject's eye 100 by adding the second compensation aberration measured in Step S401 to the aberration measured in Step S107 (S411). In addition, the calculation unit 600 may obtain optical characteristics such as spherical power. The details of the calculation are the same as in step S111 in FIG. Next, arithmetic unit 600 performs the processing of steps S113 and S115. Details of the processing are the same as those described above, and will not be described. In measuring the compensation aberration, the optical system may be appropriately arranged, and the compensation aberration in the first compensation optical unit 60A may be measured. As in the modification shown in FIG. 6, the aberration calculation of the subject's eye 100 and the output of the calculation result may be performed every aberration measurement after the compensation.
[0084]
FIG. 12 is a modified example of the flowchart of the aberration measurement using the optical system according to the fourth embodiment. The flowchart shown in FIG. 12 is an example in which the measurement of the second compensation aberration (S401) of the flowchart in FIG. 11 and the aberration measurement 2 (S107) of the light beam reflected from the subject's eye 100 are performed in parallel. The calculation may be performed in parallel using a plurality of calculation units. Since the processing in each step is the same as in FIG. 11, the same reference numerals are given and the detailed description thereof will be omitted.
[0085]
5. Fifth embodiment
FIG. 13 is a configuration diagram of an optical system according to the fifth embodiment. The optical system shown in FIG. 13 is different from the optical system according to the fourth embodiment shown in FIG. 10 in that the fourth system for measuring aberration (first compensation aberration) compensated by the first compensation optical unit 60A is further provided. This is an optical system including the measurement unit 25D. The fourth measuring unit 25D includes a fourth light receiving optical system 20D and a fourth light receiving unit 21D. Other components are the same as those in FIG. Further, FIG. 13 shows only the area inside the dotted line in FIG. 1, but the other parts are the same as those in FIG.
[0086]
The fourth light receiving optical system 20D receives the light beam emitted from the first light source unit 11 and reflected by the first compensation optical unit 60A, and guides the light beam to the fourth light receiving unit 21D. The fourth light receiving optical system 20D includes a fourth conversion member 22D (for example, a Hartmann plate) and a lens. The fourth conversion member 22D is a wavefront conversion member having a lens unit for converting the light beam reflected by the first compensation optical unit 60A into at least 17 plural beams. A plurality of micro Fresnel lenses arranged in a plane perpendicular to the optical axis can be used for the fourth conversion member 22D. The light beam from the first light source unit 11 is condensed on the fourth light receiving unit 21D via the first compensation optical unit 60A, the beam splitter 24, and the fourth conversion member 22D. The fourth light receiving unit 21D receives the light from the fourth light receiving optical system 20D that has passed through the fourth conversion member 22D, and generates a fourth signal. The light beam to the fourth light receiving optical system 20D and the light beam transmitted to the subject's eye 100 are split by the beam splitter 24. Alternatively, a mirror unit may be used in place of the beam splitter 24, and the mirror unit may be moved and inserted into the optical path to switch the light beam transmitted to the fourth light receiving optical system 20D and the eye 100 to be inspected. Further, the beam splitter 24 may be a polarization beam splitter.
[0087]
The configuration of the electric system according to the fifth embodiment can be the same as the configuration of the electric system according to the fourth embodiment. The arithmetic unit 600 further receives a fourth signal (18) from the fourth light receiving unit 21C, and performs compensation aberration (first compensation aberration) in the first compensation optical unit 60A based on the fourth signal (18). ) Is calculated.
[0088]
FIG. 14 is a flowchart of aberration measurement using the optical system according to the fifth embodiment. The flowchart of FIG. 14 is an example in which the first compensation aberration of the first compensation optical unit 60A is further measured in the flowchart of FIG. First, the calculation unit 600 performs the processing of steps S101 to S105, S150, and S401. Details of the processing are the same as those described above, and will not be described. Next, the arithmetic section 600 measures the first compensation aberration (S403). The calculation unit 600 receives the fourth signal from the fourth light receiving unit 21D, and calculates the first compensation aberration compensated by the first compensation optical unit 60A based on the input fourth signal. The aberration calculation is the same as described above. The first compensation aberration actually compensated by the first compensation optical unit 60A measured by the fourth measurement unit 25D indicates whether or not a minute area on the fundus of the subject's eye 100 is illuminated. For example, when there is a difference between the measured first compensation aberration and the second compensation aberration that is equal to or greater than a predetermined allowable value, the calculation unit 600 determines the first compensation optical unit 60A and the second compensation optical unit 60B according to the difference. May be further compensated to make the difference equal to or less than the allowable value. Further, depending on the case where the compensation amount based on the aberration measured by the output from the first light receiving unit 25A is not accurately reflected on the first compensation optical unit 60A, and a minute area is not formed on the fundus, The aberration after the compensation may not be smaller than the allowable value. In this case, when returning to step S105 by the processing described later, the calculation unit 600 may readjust the compensation amount of the first compensation optical unit 60A based on the first compensation aberration measured in step S403. Good. The arithmetic unit 600 can compare the input value to the first compensation optical unit 60A with the measured first compensation aberration, for example, to determine whether to perform readjustment. Note that the processing of steps S401 and S403 may be performed in the reverse order, or may be performed in parallel.
[0089]
Further, the arithmetic section 600 performs the processing of steps S107 and S109. Details of the processing are the same as those described above, and will not be described. Next, the calculation unit 600 obtains the aberration W of the subject's eye 100 by adding the aberration 2 measured in step S107 to the measured second compensation aberration (S407). In addition, the calculation unit 600 may obtain optical characteristics such as spherical power. The details of the calculation are the same as in step S111 in FIG. Next, arithmetic unit 600 performs the processing of steps S113 and S115. Details of the processing are the same as those described above, and will not be described. Note that the processing of steps S401 and S403 and the processing of step S107 may be performed in reverse order, or may be performed in parallel. Further, as in the modification shown in FIG. 6, the aberration calculation of the eye 100 to be inspected and the output of the calculation result may be performed every aberration measurement after the compensation.
[0090]
6. Sixth embodiment
FIG. 15 is a configuration diagram of an optical system according to the sixth embodiment. The optical system shown in FIG. 15 is an optical system that shares the first measuring unit 25A and the third measuring unit 25C of the optical system in the fourth embodiment shown in FIG. By switching between the light beam from the first light source unit 11 and the light beam from the third light source unit 16, the reflected light beam from the subject's eye 100 and the light beam emitted from the third light source unit 16 and reflected by the second compensation optical unit 60B are changed by one. Light can be received by one of the measurement units. For example, by turning on and off the first light source unit 11 and the third light source unit 16 or by providing a means for blocking a light beam such as a chopper in front of the first and third light source units 11 and 16, Is controlled, the luminous flux incident on the first light receiving optical system 20A can be switched. In addition, other than the chopper, an appropriate light beam blocking unit may be used, such as inserting a mirror into the optical path. Other components are the same as those in FIG. Also, FIG. 15 shows only the area inside the dotted line in FIG. 1, but the other parts are the same as those in FIG.
[0091]
The configuration of the electric system according to the sixth embodiment can be the same as the configuration of the electric system according to the first embodiment. The control section 610 further outputs a signal (16) to the third light source section 16.
[0092]
FIG. 16 is a flowchart of aberration measurement using the optical system according to the sixth embodiment. The flowchart shown in FIG. 16 is an example in which the measurement of the second compensation aberration and the measurement of the aberration after the compensation are performed based on the output from one measurement unit.
[0093]
First, the calculation unit 600 performs aberration measurement 1 of the subject's eye 100 based on the output from the first measurement unit 25A (S301). The calculation unit 600 turns on the first light source unit 11 and turns off the third light source unit 16, for example, so that the light beam reflected by the subject's eye 100 enters the first light receiving optical system 20A, and the first light receiving unit The first signal is input from 21A. Next, the arithmetic unit 600 calculates the aberration of the subject's eye 100 based on the input first signal. The calculation of the aberration is the same as described above. Further, the calculation unit 600 may obtain a corneal shape, a corneal aberration, and the like based on a signal from the anterior eye image receiving unit 41 of the anterior eye observation unit 40. The arithmetic unit 600 stores these calculation results in the memory 800. Next, the arithmetic part 600 performs the processing of steps S103, S105, and S150. Details of the processing are the same as those described above, and will not be described.
[0094]
The calculation section 600 measures the second compensation aberration based on the output from the first measurement section 25A (S306). The arithmetic unit 600, for example, turns off the first light source unit 11 and turns on the third light source unit 16, so that the light beam emitted from the third light source unit 16 and reflected by the second compensation optical unit 60B is reflected by the first light receiving optical system 20A. To be incident. Further, the arithmetic section 600 receives the first signal from the first light receiving section 21A, and obtains the second compensation aberration based on the input first signal. The calculation of the aberration is the same as described above. The calculation unit 600 stores the obtained aberration in the memory 800.
[0095]
Next, the calculation unit 600 performs the second aberration measurement of the subject's eye 100 based on the output from the first measurement unit 25A (S307). Details of the processing are the same as in step S301. In the above-described processing, the arithmetic unit 600 switches the light flux incident on the first light receiving optical system 20A by turning on / off the first and third light source units 11 and 16, but the first and third light sources A means for blocking a light beam such as a chopper may be provided in front of the units 11 and 16, and by controlling this, a light beam incident on the first light receiving optical system 20A may be switched. Further, the order of the processes of steps S306 and S307 may be reversed. The following processing is the same as in FIG. As in the modification shown in FIG. 6, the aberration calculation of the subject's eye 100 and the output of the calculation result may be performed every aberration measurement after the compensation.
[0096]
7. Seventh embodiment
FIG. 17 is a configuration diagram of an optical system according to the seventh embodiment. The optical system in FIG. 17 includes the fourth measuring unit 25D for measuring the first compensation aberration compensated by the first compensation optical unit 60A in the sixth embodiment shown in FIG. It is. The fourth measuring unit 25D includes a fourth light receiving optical system 20D and a fourth light receiving unit 21D. Similarly to the sixth embodiment, by switching between the light beam from the first light source unit 11 and the light beam from the third light source unit 16, the reflected light beam from the subject's eye 100 and the second light beam emitted from the third light source unit 16. The light beam reflected by the adaptive optics unit 60B can be guided to the first light receiving optical system 20A. Other components are the same as those in FIG. Also, FIG. 17 shows only the area within the dotted line in FIG. 1, but the other parts are the same as those in FIG.
[0097]
The configuration of the electric system according to the seventh embodiment can be the same as the configuration of the electric system according to the sixth embodiment. The calculation unit 600 further receives the fourth signal (18) from the fourth light receiving unit 21D, and calculates the compensation aberration in the first compensation optical unit 60A based on the fourth signal (18).
[0098]
FIG. 18 is a flowchart of aberration measurement using the optical system according to the seventh embodiment. FIG. 18 is an example in which a process for measuring the first compensation aberration is further performed on the flowchart shown in FIG. Since the processing in each step is the same as in FIGS. 14 and 16, the same reference numerals are given and the detailed description is omitted. Note that the processing of steps S306 and S403 may be performed in parallel. Further, the processing of steps S306 and S403 and the processing of step S307 may be performed in reverse order. Further, as in the modification shown in FIG. 6, the aberration calculation of the subject's eye 100 and the output of the calculation result may be performed for each measurement of the aberration after the compensation.
[0099]
8. Eighth embodiment
FIG. 19 is a configuration diagram of an optical system according to the eighth embodiment. The optical system shown in FIG. 19 is an optical system in which the first compensation optical unit 60A and the second compensation optical unit 60B of the optical system in the first embodiment shown in FIG. 1 are shared. The first compensation optical unit 60 </ b> A is inserted into a common optical path of light incident on the subject's eye 100 and light reflected from the subject's eye 100. Details of each part are the same as those in FIG.
[0100]
The configuration of the electric system according to the eighth embodiment can be the same as the configuration of the electric system according to the first embodiment. The flowchart of the aberration measurement using the optical system in the eighth embodiment can use the flowchart in the first embodiment shown in FIGS.
[0101]
9. Modified example
The optical systems in the above-described fourth to eighth embodiments can be modified to further include a second measuring unit 25B for short focus or low sensitivity measurement. Hereinafter, the modified examples will be described.
[0102]
(First Modification of Fourth Embodiment)
FIG. 20 is a configuration diagram of an optical system according to a first modification of the fourth embodiment. The optical system shown in FIG. 20A is an optical system further including a second measuring unit 25B for short focus or low sensitivity measurement and a beam splitter 23 in addition to the optical system in the fourth embodiment shown in FIG. is there. The second measuring section 25B has a second light receiving optical system 20B and a second light receiving section 21B. The second light receiving unit 21 </ b> B receives the reflected light flux from the subject's eye 100 divided into two by the beam splitter 23. At this time, for example, the third light source unit 16 is turned off so that the light beam from the third light source unit 16 does not enter the second light receiving optical system 20B. In addition, appropriate means such as providing a means for blocking a light beam such as a chopper in front of the third light source unit, or splitting the light beam from the eye 100 to be inspected and the light beam from the third light source unit 16 using a beam splitter, etc. A method can be used. Other components are the same as those in FIG. The optical system shown in FIG. 20B is arranged such that the light beam reflected by the second compensation optical unit 60B shown in FIG. 20A also enters the second measuring unit 25B. By guiding the light beam passing through the second compensation optical unit 60B to the second measurement unit 25B, the aberration after compensation can be measured by the second measurement unit 25B. Further, the first and second adaptive optics units 60A and 60B can be modified until the aberration measured by the output from the second measuring unit 25B becomes equal to or less than a predetermined allowable value. The first conversion member 22A in the optical system shown in FIGS. 20A and 20B is a wavefront conversion member having a long focal point or a highly sensitive lens unit. Other components are the same as those in FIG. 20 (a) and 20 (b) show only the area within the dotted line in FIG. 1, but the other parts are the same as those in FIG.
[0103]
The configuration of the electrical system according to the first modification of the fourth embodiment can be the same as the configuration of the electrical system according to the fourth embodiment. The calculation unit 600 further receives the third signal (11) from the second light receiving unit 21B, and calculates the aberration of the eye 100 based on the second signal (14).
[0104]
FIG. 21 is a flowchart of aberration measurement using an optical system according to a first modification of the fourth embodiment. The flowchart illustrated in FIG. 21 is an example in which the processing of the aberration measurement 1 in the flowchart illustrated in FIG. 11 is performed based on the output of the second measurement unit 25B. Since the processing in each step is the same as the processing in FIGS. 8 and 11, the same reference numerals are given and the detailed description is omitted. Steps S401 and S257 may be performed in reverse order or may be performed in parallel. Further, as in the modification shown in FIG. 6, the aberration calculation of the eye 100 to be inspected and the output of the calculation result may be performed every aberration measurement after the compensation.
[0105]
(Modification of Fifth Embodiment)
FIG. 22 is a configuration diagram of an optical system according to a modified example of the fifth embodiment. The optical system shown in FIG. 22A is an optical system further provided with a second measuring unit 25B for short focus or low sensitivity measurement and a beam splitter 23 in addition to the optical system of the fifth embodiment shown in FIG. is there. The second measuring section 25B has a second light receiving optical system 20B and a second light receiving section 21B. The second light receiving unit 21 </ b> B receives the reflected light flux from the subject's eye 100 divided into two by the beam splitter 23. As in the case of the first modification of the fourth embodiment, when the second light receiving unit 21B receives the reflected light beam from the eye 100 to be inspected, the second light receiving optical system 20B receives the light from the third light source unit 16. Of the light is not incident. Other components are the same as those in FIG. The optical system shown in FIG. 22B is arranged so that the light beam reflected by the second compensation optical unit 60B shown in FIG. 22A also enters the second measurement unit 25B. The optical system shown in FIG. 22A is modified so that the light beam via the second compensation optical unit 60B is incident on the second measuring unit 25B for short focus or low sensitivity measurement. The first conversion member 22A in the optical system shown in FIGS. 22A and 22B is a wavefront conversion member having a long focal point or a highly sensitive lens unit. Other components are the same as those in FIG. Note that FIGS. 22A and 22B show only the area inside the dotted line in FIG. 1, but the other parts are the same as in FIG. 1.
[0106]
The configuration of the electric system in the modification of the fifth embodiment can be the same as the configuration of the electric system in the fifth embodiment. The calculation unit 600 further receives the second signal (14) from the second light receiving unit 21B and calculates the aberration of the subject's eye 100 based on the second signal (14).
[0107]
FIG. 23 is a flowchart of aberration measurement using an optical system according to a modification of the fifth embodiment. The flowchart illustrated in FIG. 23 is an example in which the processing of the aberration measurement 1 in the flowchart illustrated in FIG. 14 is performed based on the output of the second measurement unit 25B. Since the processing in each step is the same as in FIGS. 8 and 14, the same reference numerals are given and the detailed description is omitted. Note that the processing of steps S401 and S403 may be performed in the reverse order, or may be performed in parallel. Further, the processing of steps S401 and S403 and the processing of S257 may be performed in the reverse order, or may be performed in parallel. Further, as in the modification shown in FIG. 6, the aberration calculation of the subject's eye 100 and the output of the calculation result may be performed every aberration measurement after the compensation.
[0108]
(First Modification of Sixth Embodiment)
FIG. 24 is a configuration diagram of an optical system according to a first modification of the sixth embodiment. The optical system shown in FIG. 24A is an optical system further provided with a second measuring unit 25B for short focus or low sensitivity measurement and a beam splitter 23 in addition to the optical system of the sixth embodiment shown in FIG. is there. The second measuring section 25B has a second light receiving optical system 20B and a second light receiving section 21B. The optical system shown in FIG. 24B is arranged such that the light beam reflected by the second compensation optical unit 60B shown in FIG. 24A also enters the second measurement unit 25B. The first conversion member 22A in the optical system shown in FIGS. 24A and 24B is a wavefront conversion member having a long focal point or a highly sensitive lens unit. Other components are the same as those in FIG. 24 (a) and 24 (b) show only a portion surrounded by a dotted line in FIG. 1, but the other portions are the same as those in FIG.
[0109]
The configuration of the electric system according to the first modification of the sixth embodiment can be the same as the configuration of the electric system according to the sixth embodiment. The calculation unit 600 further receives the third signal (14) from the second light receiving unit 21B, and calculates the aberration of the eye 100 based on the second signal (14).
[0110]
FIG. 25 is a flowchart of aberration measurement using an optical system according to a first modification of the sixth embodiment. The flowchart illustrated in FIG. 25 is an example in which the processing of the aberration measurement 1 in the flowchart illustrated in FIG. 16 is performed based on the output of the second measurement unit 25B.
[0111]
First, the calculation unit 600 causes the reflected light beam from the subject's eye 100 to enter the second measurement unit 25B, and obtains the aberration of the subject's eye 100 from the output of the second measurement unit 25B (S302). The arithmetic unit 600 turns on the first light source unit 11 and turns off the third light source unit 16, for example, so that the light beam reflected by the subject's eye 100 enters the second light receiving optical system 20A, and the second light receiving unit The second signal is input from 21A. Next, the calculation unit 600 obtains a coarse aberration of the eye 100 based on the input second signal. The calculation of the aberration is the same as described above. Further, the calculation unit 600 may obtain a corneal shape, a corneal aberration, and the like based on a signal from the anterior eye image receiving unit 41 of the anterior eye observation unit 40. The arithmetic unit 600 stores these calculation results in the memory 800. Since the processing of the following steps is the same as that of FIG. 16, the same reference numerals are given and the detailed description is omitted. Note that the processing of steps S306 and S307 may be performed in the reverse order. Further, as in the modification shown in FIG. 6, the aberration calculation of the eye 100 to be inspected and the output of the calculation result may be performed every aberration measurement after the compensation. When the optical system shown in FIG. 24B is used, the processing in step S306 may be performed based on the output of the second measurement unit 25B.
[0112]
(Modification of Seventh Embodiment)
FIG. 26 is a configuration diagram of an optical system according to a modified example of the seventh embodiment. The optical system shown in FIG. 26A is an optical system further including a second measuring unit 25B for short focus or low sensitivity measurement and a beam splitter 23 in addition to the optical system in the seventh embodiment shown in FIG. is there. The second measuring section 25B has a second light receiving optical system 20B and a second light receiving section 21B. The optical system shown in FIG. 26B is arranged such that the light beam reflected by the second compensation optical unit 60B shown in FIG. 26A also enters the second measuring unit 25B. The first conversion member 22A in the optical system shown in FIGS. 26A and 26B is a wavefront conversion member having a long focal point or a highly sensitive lens unit. Other components are the same as those in FIG. 26 (a) and 26 (b) show only the area surrounded by the dotted line in FIG. 1, but the other parts are the same as those in FIG.
[0113]
The configuration of the electrical system in the modification of the seventh embodiment can be the same as the configuration of the electrical system in the seventh embodiment. The calculation unit 600 further receives the third signal (14) from the second light receiving unit 21B, and calculates the aberration of the eye 100 based on the second signal (14).
[0114]
FIG. 27 is a flowchart of aberration measurement using an optical system according to a modification of the seventh embodiment. The flowchart illustrated in FIG. 27 is an example in which the processing of the aberration measurement 1 in the flowchart illustrated in FIG. 18 is performed based on the output of the second measurement unit 25B. Since the processing of each step is the same as in FIGS. 18 and 25, the same reference numerals are given and the detailed description is omitted. The processing of steps S306 and S403 may be performed in the reverse order. Further, the processing of steps S306 and S403 and the processing of step S307 may be performed in reverse order. Further, as in the modification shown in FIG. 6, the aberration calculation of the subject's eye 100 and the output of the calculation result may be performed every aberration measurement after the compensation.
[0115]
(Modification of the eighth embodiment)
FIG. 28 is a configuration diagram of an optical system according to a modification of the eighth embodiment. The optical system shown in FIG. 28 is an optical system further including a second measuring unit 25B for short focus or low sensitivity measurement and a beam splitter 23 in the optical system according to the eighth embodiment shown in FIG. The second measuring section 25B has a second light receiving optical system 20B and a second light receiving section 21B. The first conversion member 22A in the optical system shown in FIG. 28 is a wavefront conversion member having a long focal point or a highly sensitive lens unit. Other components are the same as those in FIG. Note that FIG. 28 shows only the area inside the dotted line in FIG. 1, but the other parts are the same as those in FIG.
[0116]
The configuration of the electric system in the modification of the eighth embodiment can be the same as that of the eighth embodiment. The calculation unit 600 further receives the third signal (14) from the second light receiving unit 21B, and calculates the aberration of the eye 100 based on the second signal (14). The flowchart shown in FIG. 8 can be used as the flowchart of the aberration measurement using the optical system in the modification of the eighth embodiment.
[0117]
Further, the optical system in each embodiment can be modified so that the first compensation optical unit 60A and the second compensation optical unit 60B are common. Hereinafter, the modified examples will be described.
[0118]
(Second Modification of Fourth Embodiment)
FIG. 29 is a configuration diagram of an optical system according to a second modification of the fourth embodiment. The optical system shown in FIG. 29 is an example in which the first compensation optical unit 60A and the second compensation optical unit 60B of the optical system in the fourth embodiment shown in FIG. 10 are shared. The first compensation optical unit 60 </ b> A is inserted into a common optical path of light incident on the subject's eye 100 and light reflected from the subject's eye 100. The third light receiving unit 21C receives the light beam from the first light source unit 11 reflected by the first compensation optical unit 60A and divided by the beam splitter 65. In the optical system illustrated in FIG. 29, as an example, the light beam for measuring the compensation aberration uses a part of the light beam from the first light source unit 11 instead of using the light beam from the third light source unit 16. Note that, similarly to the fourth embodiment, the third light source unit 16 for measuring the compensation aberration may be appropriately arranged.
[0119]
The calculation unit 600 measures the first compensation aberration based on the output from the third measurement unit 25C. The beam splitter 65 is a beam splitter that divides the light beam from the first light source unit 11 into the subject's eye 100 and the third measurement unit 25C. Further, the beam splitter 65 is also a beam splitter that reflects a light beam reflected from the eye 100 and returned. For example, the beam splitter 65 can use a beam splitter that reflects and transmits at a certain fixed ratio (for example, 9: 1). Further, the beam splitter 65 may use a half mirror. Other components are the same as those in FIG. FIG. 29 shows only a part of the optical system, but the other parts are the same as those in FIG. The optical system shown in FIG. 29 is also the same as the optical system shown in FIG. 29 in the case where the first compensation optical unit 60A and the second compensation optical unit 60B of the optical system according to the fifth embodiment are modified.
[0120]
The configuration of the electrical system according to the second modification of the fourth embodiment can be the same as that of the fourth embodiment. In addition, as a flowchart of the aberration measurement using the optical system in the second modification of the fourth embodiment, the flowcharts shown in FIGS. 11 and 12 can be used.
[0121]
(Third Modification of Fourth Embodiment)
FIG. 30 is a configuration diagram of an optical system according to a third modification of the fourth embodiment. The optical system shown in FIG. 30 is an example in which the optical system in the second modification of the fourth embodiment shown in FIG. 29 further includes a second measuring unit 25B for short focus or low sensitivity measurement and a beam splitter 23. It is. The configuration of each part is the same as in FIGS. 28 and 29. FIG. 30 shows only a part of the optical system, but other parts are the same as those in FIG.
[0122]
The configuration of the electric system according to the third modification of the fourth embodiment can be the same as the configuration of the electric system according to the second embodiment. In addition, the flowchart shown in FIG. 21 can be used as a flowchart of the aberration measurement using the optical system in the third modification of the fourth embodiment.
[0123]
(Second Modification of Sixth Embodiment)
FIG. 31 is a configuration diagram of an optical system according to a second modification of the sixth embodiment. The optical system shown in FIG. 31 is an example in which the first compensation optical unit 60A and the second compensation optical unit 60B of the optical system in the sixth embodiment shown in FIG. 15 are shared. The first compensation optical unit 60 </ b> A is inserted into a common optical path of light incident on the subject's eye 100 and light reflected from the subject's eye 100. A part of the light beam from the first light source unit 11 is transmitted to the eye 100 via the first compensation optical unit 60A and the beam splitter 65. In addition, a part of the light beam from the first light source unit 11 passes through the beam splitter 65 via the first compensation optical unit 60A, and is guided to the first measurement unit 25C as a light beam for measuring compensation aberration. The reflected light flux from the eye 100 is reflected by the beam splitter 64 via the beam splitter 65 and the first compensation optical unit 60A, and is guided to the first measurement unit 25A. The beam splitter 64 is, for example, a polarization beam splitter that transmits a light beam from the first light source unit 11 and reflects a light beam reflected from the subject's eye 100. By switching between the reflected light beam from the subject's eye 100 and the light beam for measuring the compensation aberration that enter the first measurement unit 25C, measurement can be performed by one measurement unit. For example, a chopper is provided on the optical path in front of the beam splitter 64, and by controlling this, the light flux can be switched. Note that the chopper can be arranged at an appropriate place. In addition, an appropriate means other than the insertion of the chopper may be used as the light flux switching means. Other components are the same as those in FIG. Although FIG. 31 shows only a part of the optical system, other parts are the same as those in FIG. Further, the modification is the same as that of the optical system shown in FIG. 31 in the case where the first compensation optical unit 60A and the second compensation optical unit 60B of the optical system according to the seventh embodiment are modified.
[0124]
The configuration of the electrical system according to the second modification of the sixth embodiment can be the same as that of the sixth embodiment. The flowchart of FIG. 16 can be used as a flowchart of aberration measurement using an optical system in the second modification of the sixth embodiment. However, the reflected light beam from the subject's eye 100 and the light beam for measuring the compensation aberration, which are incident on the first measurement unit 25C, are switched not by turning on / off the light source but by controlling a chopper provided on the optical path. Further, by providing a light source unit for measuring the compensation aberration and turning on and off the light source unit and the first light source unit 11, the light flux to the first measuring unit 25A can be switched.
[0125]
(Third Modification of Sixth Embodiment)
FIG. 32 is a configuration diagram of an optical system according to a third modification of the sixth embodiment. The optical system shown in FIG. 32 is an example in which the optical system of the second modified example of the sixth embodiment shown in FIG. 31 further includes a second measuring unit 25B for short focus or low sensitivity measurement and a beam splitter 23. It is. The configuration of each part is the same as in FIGS. 28 and 31. FIG. 32 shows only a part of the optical system, but other parts are the same as those in FIG.
[0126]
The configuration of the electric system according to the third modification of the sixth embodiment can be the same as the configuration of the electric system according to the fourth embodiment. In addition, the flowchart shown in FIG. 25 can be used as the flowchart of the aberration measurement using the optical system in the third modification of the sixth embodiment.
[0127]
【The invention's effect】
According to the present invention, it is possible to provide a precise and wide-ranging eye characteristic measuring apparatus capable of performing accurate measurement even when the amount of aberration is large. According to the present invention, illumination of the eye 100 can be performed in an appropriate illumination state. Further, according to the present invention, when measuring the optical characteristics of the subject's eye 100, an eye characteristic measuring apparatus that performs a precise measurement by performing compensation to cancel the aberration and further measuring the aberration amount after the compensation. Can be provided. According to the present invention, there is provided an eye characteristic measuring apparatus which performs correction so as to cancel out the aberration of the measuring light, and more precisely and more quickly measures optical characteristics using a low-sensitivity and high-sensitivity optical system. can do. Further, according to the present invention, more accurate measurement can be performed in consideration of a difference between an input value for canceling aberration and an aberration actually compensated.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an optical system according to a first embodiment.
FIG. 2 is a configuration diagram of an electric system according to the first embodiment.
FIG. 3 is a flowchart of aberration measurement using the optical system according to the first embodiment.
FIG. 4 is a flowchart of aberration compensation processing other than aberration measurement 1;
FIG. 5 is an explanatory diagram of a coordinate relationship.
FIG. 6 is a modified example of the flowchart of the aberration measurement using the optical system according to the first embodiment.
FIG. 7 is a configuration diagram of an optical system according to a second embodiment.
FIG. 8 is a flowchart of aberration measurement using an optical system according to the second embodiment.
FIG. 9 is a configuration diagram of an optical system according to a third embodiment.
FIG. 10 is a configuration diagram of an optical system according to a fourth embodiment.
FIG. 11 is a flowchart of aberration measurement using an optical system according to a fourth embodiment.
FIG. 12 is a modified example of the flowchart of the aberration measurement using the optical system according to the fourth embodiment.
FIG. 13 is a configuration diagram of an optical system according to a fifth embodiment.
FIG. 14 is a flowchart of aberration measurement using the optical system according to the fifth embodiment.
FIG. 15 is a configuration diagram of an optical system according to a sixth embodiment.
FIG. 16 is a flowchart of aberration measurement using the optical system according to the sixth embodiment.
FIG. 17 is a configuration diagram of an optical system according to a seventh embodiment.
FIG. 18 is a flowchart of aberration measurement using an optical system according to the seventh embodiment.
FIG. 19 is a configuration diagram of an optical system according to an eighth embodiment.
FIG. 20 is a configuration diagram of an optical system according to a first modification of the fourth embodiment.
FIG. 21 is a flowchart of aberration measurement using an optical system according to a first modification of the fourth embodiment.
FIG. 22 is a configuration diagram of an optical system according to a modification of the fifth embodiment.
FIG. 23 is a flowchart of aberration measurement using an optical system according to a modification of the fifth embodiment.
FIG. 24 is a configuration diagram of an optical system according to a first modification of the sixth embodiment.
FIG. 25 is a flowchart of aberration measurement using an optical system according to a first modification of the sixth embodiment.
FIG. 26 is a configuration diagram of an optical system according to a modification of the seventh embodiment.
FIG. 27 is a flowchart of aberration measurement using an optical system according to a modification of the seventh embodiment.
FIG. 28 is a configuration diagram of an optical system according to a modification of the eighth embodiment.
FIG. 29 is a configuration diagram of an optical system according to a second modification of the fourth embodiment.
FIG. 30 is a configuration diagram of an optical system according to a third modification of the fourth embodiment.
FIG. 31 is a configuration diagram of an optical system according to a second modification of the sixth embodiment.
FIG. 32 is a configuration diagram of an optical system according to a third modification of the sixth embodiment.
FIG. 33 shows a Zernike polynomial (1).
FIG. 34 is a Zernike polynomial (2).
[Explanation of symbols]
10 First illumination optical system
11 First light source unit
16 Third light source unit
20A First light receiving optical system
21A First light receiving unit
25A First measurement unit
25B 2nd measuring part
25C 3rd measuring part
25D 4th measuring part
30 Anterior segment observation unit
31 Second light source unit
40 Anterior segment lighting unit
41 Anterior eye image receiving unit
50 First adjustment optical unit
60A first adaptive optics
60B second adaptive optics
70 second adjustment optical unit
90 Opto-optical unit
600 arithmetic unit
610 control unit
650 input section
700 display
800 memory

Claims (27)

A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A second part for receiving a part of the reflected light beam reflected from the retina to be examined through a first conversion member having a long focal point or a highly sensitive lens part that converts at least substantially 17 beams. One light receiving optical system,
A second part for receiving light via a second conversion member having a short focus or low sensitivity lens unit that converts a part of the reflected light flux reflected from the retina of the subject's eye and returned to at least substantially 17 beams. Two light receiving optical systems,
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A second light receiving unit that receives a light beam received by the second light receiving optical system;
A compensation amount calculation unit that determines the optical characteristics of the subject's eye based on the output of the first light receiving unit and / or the second light receiving unit, calculates and outputs a compensation amount for canceling the aberration according to the optical characteristics,
A compensating optical unit that performs aberration compensation on both the illumination light beam from the first illumination optical system and the reflected light beam from the retina of the subject's eye, according to the compensation amount output from the compensation amount calculation unit;
Measurement operation for obtaining the optical characteristics of the eye to be inspected based on the optical characteristics based on the output of the first light receiving unit and / or the second light receiving unit after the compensation by the compensation optical unit and the optical characteristics compensated by the compensation optical unit. Characteristic measuring device comprising: In the second light receiving optical system, the change in the beam converted by the second conversion member over the measurable range is set smaller than the conversion pitch of the second conversion member. As a result, signal processing is easy and The eye characteristic measuring device according to claim 1, wherein the eye characteristic measuring device is configured to be able to achieve high speed. The compensation amount calculation unit obtains an optical characteristic of the subject's eye based on the output of the second light receiving unit, calculates and outputs a compensation amount for canceling aberration according to the optical characteristic,
The measurement calculation unit is configured to obtain the optical characteristics of the eye to be examined with high sensitivity based on the optical characteristics based on the output of the first light receiving unit and the optical characteristics compensated by the compensation optical unit. 3. The eye characteristic measuring device according to 2. A third light source unit that emits a light beam for illuminating the adaptive optics unit;
A third light receiving optical system for receiving a light beam from the third light source unit via the compensation optical unit and a third conversion member that converts the light beam into at least substantially 17 beams;
A third light receiving unit that receives a light beam received by the third light receiving optical system;
With
The measurement calculation unit is configured to measure an optical characteristic compensated by the compensation optical unit based on an output of the third light receiving unit, and obtain an optical characteristic of the eye to be inspected using the measured optical characteristic. Item 4. The eye characteristic measuring device according to any one of Items 1 to 3. The wavelength of the light beam from the third light source unit is different from the first wavelength of the first light source unit,
The measurement calculation unit is configured to measure an optical characteristic based on an output of the first light receiving unit after compensation by the compensation optical unit and to measure an optical characteristic compensated by the compensation optical unit based on an output of the third light receiving unit. The eye characteristic measuring device according to claim 4, wherein the eye characteristic measuring device is configured to perform the measurement in parallel. Furthermore, a third light source unit that emits a light beam for illuminating the adaptive optics unit is provided,
The first light receiving unit further receives a light beam from the third light source unit via the adaptive optics unit and the first conversion member,
The measurement calculation unit measures the optical characteristic compensated by the compensation optical unit based on the output of the first light receiving unit due to the light beam from the third light source unit, and uses the measured optical characteristic to measure the optical characteristic of the eye to be inspected. The eye characteristic measuring device according to claim 1, wherein the eye characteristic measuring device is configured to obtain a characteristic. The first light receiving unit may be configured to turn on and off the first and third light source units or to insert a light beam blocking unit into an optical path from the first and third light source units. 7. The eye characteristic measuring device according to claim 6, wherein the light beam to be received is switched. The third light source unit includes a common light source as the first light source unit,
The eye characteristic measuring apparatus according to claim 4, wherein the light beam from the third light source unit is configured to use a part of the light beam from the first light source unit. . A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A first light receiving optical system for receiving a part of the reflected light flux reflected from the retina to be examined and returned via at least substantially a first conversion member that converts the light into 17 beams;
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A second light source unit that emits a light beam of a second wavelength;
An anterior segment illuminating unit that illuminates the vicinity of the cornea of the eye to be examined in a predetermined pattern with a light beam from the second light source unit;
An anterior ocular segment observation unit for receiving a reflected light flux that is reflected and returned from near the cornea of the eye to be examined,
An anterior ocular segment image light receiving unit that receives a light beam received by the anterior ocular segment observation unit,
A compensation amount calculation unit that determines the optical characteristics of the subject's eye based on the output of the anterior ocular segment image light receiving unit, calculates and outputs a compensation amount for canceling aberrations according to the optical characteristics,
A compensating optical unit that performs aberration compensation on both the illumination light beam from the first illumination optical system and the reflected light beam from the retina of the subject's eye, according to the compensation amount output from the compensation amount calculation unit;
An eye characteristic measuring device comprising: an optical characteristic based on an output of the first light receiving unit after compensation by the compensation optical unit; . The eye characteristic measuring device according to claim 9, wherein the measurement calculation unit is further configured to obtain a corneal shape of the eye to be examined based on an output from the anterior ocular segment image light receiving unit. A third light source unit that emits a light beam for illuminating the adaptive optics unit;
A third light receiving optical system for receiving a light beam from the third light source unit via the compensation optical unit and a third conversion member that converts the light beam into at least substantially 17 beams;
A third light receiving unit that receives a light beam received by the third light receiving optical system;
With
The measurement calculation unit is configured to measure an optical characteristic compensated by the compensation optical unit based on an output of the third light receiving unit, and determine an optical characteristic of the subject's eye using the measured optical characteristic. Item 11. The eye characteristic measuring device according to item 9 or 10. The wavelength of the light beam from the third light source unit is different from the first wavelength of the first light source unit,
The measurement calculation unit is configured to measure an optical characteristic based on an output of the first light receiving unit after compensation by the compensation optical unit and to measure an optical characteristic compensated by the compensation optical unit based on an output of the third light receiving unit. The eye characteristic measuring apparatus according to claim 11, wherein the apparatus is configured to perform the measurement in parallel. Furthermore, a third light source unit that emits a light beam for illuminating the adaptive optics unit is provided,
The first light receiving unit further receives a light beam from the third light source unit via the adaptive optics unit and the first conversion member,
The measurement calculation unit measures the optical characteristics compensated by the compensation optical unit based on the output of the first light receiving unit due to the light beam from the third light source unit, and uses the measured optical characteristics to measure the optical characteristics of the subject's eye. The eye characteristic measuring device according to claim 9, wherein the eye characteristic measuring device is configured to obtain a characteristic. The first light receiving unit may be configured to turn on and off the first and third light source units or to insert a light beam blocking unit into an optical path from the first and third light source units. The eye characteristic measuring apparatus according to claim 13, wherein a light beam received by the device is switched. The third light source unit includes a common light source as the first light source unit,
14. The eye characteristic measuring device according to claim 9, wherein a part of the light beam from the first light source unit is used as the light beam from the third light source unit. . A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A first light receiving optical system for receiving, via a first conversion member having a lens unit that converts a part of the reflected light flux reflected from the retina to be examined and returned to at least substantially 17 beams,
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A compensation amount calculation unit that determines an optical characteristic of the eye to be inspected based on an output of the first light receiving unit, and calculates and outputs a compensation amount for canceling aberration according to the optical characteristic;
A compensating optical unit that performs aberration compensation on both the illumination light beam from the first illumination optical system and the reflected light beam from the retina of the subject's eye, according to the compensation amount output from the compensation amount calculation unit;
A third light source unit that emits a light beam for illuminating the adaptive optics unit;
A third light receiving optical system for receiving a light beam from the third light source unit via the compensation optical unit and a third conversion member that converts the light beam into at least substantially 17 beams;
A third light receiving unit that receives a light beam received by the third light receiving optical system;
The optical characteristics based on the output of the first light receiving unit after the compensation by the compensating optical unit and the optical characteristics compensated by the compensating optical unit based on the output of the third light receiving unit are measured. An eye characteristic measurement device comprising: a measurement calculation unit that obtains optical characteristics of the subject's eye based on the measurement operation unit. The wavelength of the light beam from the third light source unit is different from the first wavelength of the first light source unit,
The measurement calculation unit is configured to measure an optical characteristic based on an output of the first light receiving unit after compensation by the compensation optical unit and to measure an optical characteristic compensated by the compensation optical unit based on an output of the third light receiving unit. 17. The eye characteristic measuring device according to claim 16, wherein the eye characteristic measuring device is configured to perform the measurement in parallel. The third light source unit includes a common light source as the first light source unit,
The eye characteristic measuring device according to claim 16, wherein the light beam from the third light source unit is configured to use a part of the light beam from the first light source unit. A first light source unit that emits a light beam of a first wavelength;
A first illumination optical system for illuminating a minute area on the retina of the subject's eye with a wide beam with a light beam from the first light source unit;
A third light source unit that emits a light beam for measuring the compensated aberration,
A part of the reflected light beam reflected from the retina of the eye to be examined and the light beam from the third light source unit are received via a first conversion member having a lens unit that converts the light beam into at least substantially 17 beams. A first light receiving optical system for
A first light receiving unit that receives a light beam received by the first light receiving optical system;
A compensation amount calculation unit that determines an optical characteristic of the eye to be inspected based on an output of the first light receiving unit, and calculates and outputs a compensation amount for canceling aberration according to the optical characteristic;
Compensation optics for compensating aberration for the illumination light beam from the first illumination optical system, the reflected light beam from the retina of the eye to be examined, and the light beam from the third light source unit according to the compensation amount output from the compensation amount calculation unit. Department and
The optical characteristic compensated by the compensation optical unit is measured based on the output of the first light receiving unit by the light beam from the third light source unit, and the output of the first light receiving unit by the light beam from the first light source unit is measured. An eye characteristic measuring apparatus comprising: a measuring and calculating unit that measures optical characteristics after compensation by the compensation optical unit based on the above, and obtains optical characteristics of the eye to be inspected based on the measured optical characteristics. The first light receiving unit may be configured to turn on and off the first and third light source units or to insert a light beam blocking unit into an optical path from the first and third light source units. 20. The eye characteristic measuring apparatus according to claim 19, wherein the light beam received by the light source is switched. The third light source unit includes a common light source as the first light source unit,
20. The eye characteristic measuring device according to claim 19, wherein the light beam from the third light source unit is configured to use a part of the light beam from the first light source unit. The compensating optical unit includes a first compensating optical unit for compensating aberration for the illumination light beam from the first illumination optical system, and a second compensating optical unit for compensating aberration for the reflected light beam from the retina of the eye to be examined. 22. The eye characteristic measuring apparatus according to claim 1, further comprising a unit. Further, a fourth light receiving optical system for receiving a part of the light beam from the first light source unit through the first compensation optical unit and a fourth conversion member that converts the part into at least substantially 17 beams. ,
A fourth light receiving unit that receives a light beam received by the fourth light receiving optical system,
The third light source unit illuminates the second adaptive optics unit,
The third light receiving unit receives a light beam from the third light source unit via the second compensation optical unit and the third conversion member,
The measurement calculation unit is further configured to measure the optical characteristics compensated by the second compensation optical unit based on the output of the third light receiving unit, and determine the optical characteristics of the eye to be inspected using the measured optical characteristics. 23. The eye characteristic measuring device according to claim 22, wherein the eye characteristic is measured. The compensation amount calculation unit can compensate the spherical power component, which is a low-order aberration, by moving the first illumination optical system and / or the first light receiving optical system based on the optical characteristics of the eye to be inspected. The eye characteristic measuring device according to any one of claims 1 to 23, wherein: The eye characteristic measuring apparatus according to any one of claims 1 to 24, wherein the compensation optical unit is configured to perform compensation including at least a higher-order component of the optical characteristics of the eye to be inspected. 26. The eye characteristic measuring device according to claim 1, wherein the adaptive optics unit is configured by at least one of a liquid crystal spatial light modulator and a variable mirror. The optical characteristic of the eye to be inspected is displayed on a display unit after the compensation by the compensation optical unit, and the aberration is further compensated by the compensation amount calculation unit and the compensation optical unit according to an instruction from an input unit. The eye characteristic measuring device according to any one of 1 to 26.

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