JPH0994227A - Ophthalmological apparatus - Google Patents
Ophthalmological apparatusInfo
- Publication number
- JPH0994227A JPH0994227A JP7276954A JP27695495A JPH0994227A JP H0994227 A JPH0994227 A JP H0994227A JP 7276954 A JP7276954 A JP 7276954A JP 27695495 A JP27695495 A JP 27695495A JP H0994227 A JPH0994227 A JP H0994227A
- Authority
- JP
- Japan
- Prior art keywords
- eye
- alignment
- inspected
- state
- condition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、装置と被検眼との
位置合わせ状態を検知し、所定の位置合わせ状態になっ
た場合に自動的に被検眼の情報を得る眼科装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus which detects the alignment state between the apparatus and an eye to be inspected and automatically obtains information on the eye to be inspected when a predetermined alignment state is reached.
【０００２】[0002]
【従来の技術】従来から、眼科用装置には被検眼との位
置関係に対して正確な位置合わせが要求されるものが多
く、特に眼底カメラや非接触眼圧計等は極めて精密な位
置合わせが必要であり、その許容誤差が極めて狭いこと
が知られている。このために、計測装置と被検眼との位
置合わせの度合いを検出する機構について数々の提案が
なされており、特に最近は検出された位置合わせ情報を
使用して位置関係を正しく調整した後で、検者の特別な
操作なしに自動的に測定及び記録を行う計測装置が提案
されている。2. Description of the Related Art Conventionally, many ophthalmic devices are required to be accurately aligned with respect to the positional relationship with the eye to be inspected. Especially, a fundus camera, a non-contact tonometer, and the like require extremely precise alignment. It is known that it is necessary and its tolerance is extremely narrow. For this reason, a number of proposals have been made regarding a mechanism for detecting the degree of alignment between the measuring device and the eye to be inspected, and recently, particularly after correctly adjusting the positional relationship using the detected alignment information, There has been proposed a measuring device that automatically measures and records without any special operation by an examiner.
【０００３】例えば、特開昭６３−２８３６２０号公報
に開示されている装置は、図６に示すような検出光学系
を有し、ＬＥＤ光源１から出射した位置合わせ用光束
は、投影レンズ２を介してハーフミラー３で反射され、
対物レンズ４により被検眼Ｅの角膜Ec上に集光される。
角膜Ec上で反射した光束は再び対物レンズ４を通り、ハ
ーフミラー３、結像レンズ５により光検出器６に結像受
光されて位置合わせ検出が行われる。For example, the apparatus disclosed in Japanese Patent Application Laid-Open No. 63-283620 has a detection optical system as shown in FIG. 6, and the alignment light flux emitted from the LED light source 1 passes through the projection lens 2. Is reflected by the half mirror 3 through
The light is focused on the cornea Ec of the eye E by the objective lens 4.
The light flux reflected on the cornea Ec passes through the objective lens 4 again, and is imaged and received by the photodetector 6 by the half mirror 3 and the imaging lens 5 to perform alignment detection.
【０００４】この検出機構では、角膜Ecが装置に対して
正しく位置合わせされた場合に、光検出器６の受光信号
量が最大となるように構成されており、光検出器６で光
電変換された受光信号は判断回路７によって位置合わせ
状態が検出されると、その検出結果により測定トリガ発
生器８から信号が発せられ、測定が開始されるようにな
っている。In this detection mechanism, when the cornea Ec is correctly aligned with the apparatus, the light receiving signal amount of the photodetector 6 is maximized, and photoelectric conversion is performed by the photodetector 6. When the judgment circuit 7 detects the alignment state of the received light signal, a signal is emitted from the measurement trigger generator 8 according to the detection result, and the measurement is started.
【０００５】図７は被検眼Ｅと装置の位置合わせが前後
左右でずれた場合の光検出器６の出力の変化状態を示
し、Ｚ軸は光検出器６の信号出力、Ｘ軸は装置の左右方
向の位置、Ｙ軸は前後方向の位置を表しており、被検眼
Ｅと装置の位置合わせが完全になされた場合は、出力は
Ｚ軸上で極大値を示す。図８は図７を上から見た等高線
による説明図であり、実際の被検眼Ｅと装置との位置合
わせの軌跡が曲線S1、S2で示されている。FIG. 7 shows a change state of the output of the photodetector 6 when the position of the eye E to be inspected and the device are deviated from each other in the front-rear direction. The position in the left-right direction and the Y-axis represent the position in the front-rear direction. When the eye E to be inspected and the device are completely aligned, the output shows a maximum value on the Z-axis. FIG. 8 is an explanatory view by contour lines as viewed from above in FIG. 7, and the actual locus of alignment between the eye E to be inspected and the apparatus is shown by curves S1 and S2.
【０００６】このように、被検眼Ｅと装置との相対関係
は試行的に常に動いているので、自動測定を行う場合に
は、同一レベル内に留まる時間やレベル間を遷移する回
数等を基にして、予め設定された条件を満足した場合
に、測定トリガ発生器８から信号が出力され測定が開始
される。As described above, since the relative relationship between the eye E and the apparatus constantly moves on a trial basis, when performing automatic measurement, the time to stay within the same level, the number of transitions between levels, and the like are used. Then, when the preset condition is satisfied, the signal is output from the measurement trigger generator 8 and the measurement is started.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら今日にお
いては、より正確に位置合わせが行われた状態で行う測
定の他に、例えば固視が不充分な状態でも、或る程度の
位置合わせの状態で測定を行う装置が求められている。However, nowadays, in addition to the measurement performed in a more accurate alignment state, for example, even when the fixation is insufficient, a certain degree of alignment state can be obtained. There is a need for a device that makes measurements.
【０００８】本発明の第１の目的は、上述の問題点を解
消し、被検眼の固視状況に応じて適切な自動測定を行う
眼科装置を提供することにある。A first object of the present invention is to solve the above-mentioned problems and to provide an ophthalmologic apparatus which performs appropriate automatic measurement according to the fixation state of the eye to be examined.
【０００９】本発明の第２の目的は、装置を駆動する駆
動手段と組み合わせて位置合わせを行い、位置合わせ完
了を判断して自動測定を行う眼科装置を提供することに
ある。A second object of the present invention is to provide an ophthalmologic apparatus which performs positioning by combining with a driving means for driving the apparatus, judges the completion of the positioning and performs automatic measurement.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
の第１発明に係る眼科装置は、被検眼と装置との位置合
わせ状態を逐次に検知する位置検出手段を有し、該位置
検出手段から得られる位置合わせ誤差に基づいて自動的
に被検眼の情報を得る眼科装置において、前記被検眼の
情報を得るための条件を前記位置合わせ誤差の状態に応
じて異ならせて設定する条件設定手段を有することを特
徴とする。An ophthalmologic apparatus according to a first aspect of the present invention for achieving the above object has a position detecting means for sequentially detecting the alignment state between an eye to be inspected and the apparatus, and the position detecting means. In an ophthalmologic apparatus that automatically obtains information of the eye to be inspected based on the alignment error obtained from the condition setting means for setting the condition for obtaining the information of the eye to be inspected differently according to the state of the alignment error. It is characterized by having.
【００１１】第２発明に係る眼科装置は、被検眼と装置
との位置合わせ状態を逐次に検知する位置検知手段と、
該位置検知手段から得られる位置合わせ状態が所定条件
を満足するか否かに基づいて自動的に被検眼情報を得る
ための制御手段とを有し、該制御手段は前記位置検知手
段から得られる位置合わせ状態が、位置合わせ誤差の程
度に応じて異なる度合いで所定条件を満足するか否かの
判断に使用することを特徴とする。An ophthalmologic apparatus according to a second aspect of the present invention comprises position detecting means for sequentially detecting the alignment state between the eye to be inspected and the apparatus,
And a control means for automatically obtaining eye information based on whether or not the alignment state obtained from the position detection means satisfies a predetermined condition, and the control means is obtained from the position detection means. It is characterized in that it is used to judge whether or not the alignment state satisfies a predetermined condition at different degrees depending on the degree of alignment error.
【００１２】[0012]
【発明の実施の形態】本発明を図１〜図５に図示の実施
例に基づいて詳細に説明する。図１は実施例の光学系の
斜視図を示し、被検眼Ｅの前方の光軸上には、対物レン
ズ１１、ハーフミラー１２、複数開口を有する絞り１
３、結像レンズ１４、撮像素子１５が順次に配列され、
ハーフミラー１２の上方の入射方向には、投影レンズ１
６、光源１７が配列されており、撮像素子１５の出力は
演算回路１８に接続されている。更に、図の光路中には
ビームスプリッタが配置され、このビームスプリッタを
介して対物レンズ１１を共用する眼底撮影観察系や眼屈
折測定光学系等の検眼測定系が配置されているが、図で
は省略している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 shows a perspective view of an optical system of an embodiment, in which an objective lens 11, a half mirror 12, and a diaphragm 1 having a plurality of apertures are arranged on an optical axis in front of an eye E to be examined.
3, the imaging lens 14, and the image sensor 15 are sequentially arranged,
In the incident direction above the half mirror 12, the projection lens 1
6, the light source 17 is arranged, and the output of the image sensor 15 is connected to the arithmetic circuit 18. Further, a beam splitter is arranged in the optical path in the figure, and an optometry system such as a fundus photographing observation system and an eye refraction measurement optical system which share the objective lens 11 are arranged through the beam splitter. Omitted.
【００１３】複数開口絞り１３は、図２に示すような中
心部開口１３ａと、この中心部開口１３ａに対して水平
方向に対称に配置された開口１３ｂ、１３ｃとにより構
成され、これらの開口１３ｂ、１３ｃに対応して、その
後方にそれぞれプリズム１９ｂ、１９ｃが配置されてお
り、開口１３ａにはプリズムは配置されていない。The multi-aperture diaphragm 13 is composed of a central opening 13a as shown in FIG. 2 and openings 13b and 13c arranged symmetrically with respect to the central opening 13a in the horizontal direction. , 13c, prisms 19b, 19c are arranged behind them, respectively, and no prism is arranged in the opening 13a.
【００１４】図３(a) 、(b) は開口１３ｂ、１３ｃとプ
リズム１９ｂ、１９ｃの側面図を示し、プリズム１９
ｂ、１９ｃは２つの開口１３ｂ、１３ｃの中心を結んだ
線に対して垂直方向に斜面が設けられ、それぞれの斜面
の向きが異なるように配置されている。3A and 3B are side views of the openings 13b and 13c and the prisms 19b and 19c, respectively.
b and 19c are provided with slopes perpendicular to the line connecting the centers of the two openings 13b and 13c, and are arranged so that the directions of the slopes are different.
【００１５】光源１７から射出した光束は、投影レンズ
１６を通りハーフミラー１２に反射され、対物レンズ１
１から被検眼Ｅの角膜Ecを照明し、対物レンズ１１の焦
点位置に角膜反射による虚像１７’を形成する。この虚
像１７’からの光束は再び対物レンズ１１で屈折され、
平行光となって複数開口絞り１３に入射する。絞り１３
において中心の開口１３ａを通過した光束はそのまま偏
向されずに直進し、一対の開口１３ｂ、１３ｃを通過し
た光束はプリズム１９ｂ、１９ｃによってそれぞれ上下
の別方向に偏向され、結像レンズ１４によりその焦点位
置にある撮像素子１５上に、被検眼Ｅの前眼部と共に角
膜反射像１７”を結像する。The light beam emitted from the light source 17 passes through the projection lens 16 and is reflected by the half mirror 12, and the objective lens 1
The cornea Ec of the eye E is illuminated from 1 to form a virtual image 17 'due to corneal reflection at the focal position of the objective lens 11. The light flux from this virtual image 17 'is refracted again by the objective lens 11,
It becomes parallel light and enters the multi-aperture diaphragm 13. Aperture 13
, The light flux that has passed through the central opening 13a travels straight without being deflected, and the light flux that has passed through the pair of openings 13b and 13c is deflected in different vertical directions by the prisms 19b and 19c, respectively, and is focused by the imaging lens 14 at its focal point. A corneal reflection image 17 ″ is formed on the image sensor 15 at the position together with the anterior segment of the eye E to be inspected.
【００１６】このとき撮像素子１５上には、対物レンズ
１１及び結像レンズ１４によって、図示しない照明光源
に照明されて開口１３ａを通過した前眼部像と、開口１
３ｂ、１３ｃを通過してプリズム１９ｂ、１９ｃにより
偏向された角膜反射像１７”とが映出され、この角膜反
射像１７”は撮像素子１５上の異なる所定位置に分離し
て結像される。At this time, on the image pickup device 15, the anterior ocular segment image which has been illuminated by an illumination light source (not shown) by the objective lens 11 and the imaging lens 14 and has passed through the aperture 13a, and the aperture 1.
A corneal reflection image 17 ″ deflected by the prisms 19b and 19c after passing through 3b and 13c is projected, and the corneal reflection image 17 ″ is separated and imaged at different predetermined positions on the image sensor 15.
【００１７】なお、撮像素子１５上に角膜反射像１７”
だけを結像させる場合は、前眼部照明用光源と光源１１
とが異なる発光波長の光束を発するように選定し、開口
１３ｂ、１３ｃが光源１１からの光束の波長だけを透過
するようにする。実際には、プリズム１９ｂ、１９ｃに
上述のような光学特性を有する誘電体多層膜を蒸着した
り、開口１３ｂ、１３ｃの近傍にフィルタを配置するな
どの構成とする。A cornea reflection image 17 "is formed on the image pickup device 15.
In the case of forming an image of only the
Are selected so as to emit light fluxes having different emission wavelengths, and the openings 13b and 13c transmit only the wavelength of the light flux from the light source 11. In practice, the dielectric multilayer film having the above-mentioned optical characteristics is vapor-deposited on the prisms 19b and 19c, and a filter is arranged near the openings 13b and 13c.
【００１８】図４は位置合わせが完了した状態の撮像素
子１５上の画像を示し、実際の装置では図示しない内蔵
テレビモニタに表示される。この内蔵テレビモニタに
は、中心部開口１３ａを通過して結像された前眼部Pf
と、周辺部開口１３ｂ、１３ｃを通過して結像された角
膜反射像１７ｂ”、１７ｃ”とが表示される。なお、１
７ａ”は中心部開口１３ａを通過した反射像である。FIG. 4 shows an image on the image pickup device 15 in a state where the alignment is completed, which is displayed on an internal television monitor (not shown) in an actual device. This built-in television monitor has an anterior segment Pf imaged through the central opening 13a.
And corneal reflection images 17b ″ and 17c ″ formed by passing through the peripheral openings 13b and 13c are displayed. In addition, 1
7a ″ is a reflection image that has passed through the central opening 13a.
【００１９】この状態で、角膜反射像１７ｂ”、１７
ｃ”の中間位置座標X0、Y0と、両者間の水平方向距離Dx
を算出して記憶する。これらの角膜反射像１７ｂ”、１
７ｃ”の抽出は、一般的に画像をフレームメモリに取り
込んでソフトウェアにより抽出する方式や、撮像素子１
５からのビデオ信号をコンパレータで比較し、所定レベ
ル以上の信号が得られた時間から抽出する方式等により
行われ、演算回路１８はこれらの演算を行う。In this state, the corneal reflection images 17b ", 17
Intermediate position coordinates X0, Y0 of c "and the horizontal distance Dx between them
Is calculated and stored. These corneal reflection images 17b ″, 1
7c ″ is generally extracted by a method in which an image is captured in a frame memory and extracted by software, or the image sensor 1
This is performed by a method of comparing the video signals from 5 with a comparator and extracting from the time when a signal of a predetermined level or higher is obtained. The arithmetic circuit 18 performs these arithmetic operations.
【００２０】実際の位置合わせ時に得られる角膜反射像
１７ｂ”、１７ｃ”の中間位置座標Ｘ、Ｙは、被検眼Ｅ
の装置に対する左右上下方向位置に対応し、また両者間
の水平方向距離Ｄは同様に前後方向位置にそれぞれ対応
するので、これらの値がX0、Y0、Dxからどの程度ずれて
いるかにより、各方向の位置合わせずれ量が演算回路１
８において演算される。The intermediate position coordinates X and Y of the corneal reflection images 17b "and 17c" obtained during the actual alignment are the eye E to be examined.
The horizontal distance D between the two devices corresponds to the horizontal position and the horizontal distance D between them also corresponds to the front-back position. Therefore, depending on how much these values deviate from X0, Y0, and Dx, each direction The amount of misalignment of
8 is calculated.
【００２１】本実施例によれば、被検眼Ｅと装置との位
置合わせ状態が三次元方向で定量的に検知できるので、
位置合わせのずれ量に対し所定の重みを付することがで
きる。例えば、図５に示すようにずれの量と方向をＸＹ
Ｚ座標で考え、所定の位置合わせ状態（図の座標中心
Ｏ）に対して位置ずれ量に応じてレベル１〜３の範囲を
設定し、レベル３に相当する領域L3が中心Ｏに対して±
０．１ｍｍ以内の誤差範囲であれば重み１００、レベル
２の領域L2が±０．２ｍｍ以内の誤差範囲であれば重み
５０、レベル１の領域L1が±０．４ｍｍ以内の誤差範囲
であれば重み１０というように設定する。According to this embodiment, the alignment state between the eye E and the apparatus can be quantitatively detected in the three-dimensional direction.
A predetermined weight can be given to the amount of misalignment of the alignment. For example, as shown in FIG.
Considering the Z coordinate, a range of levels 1 to 3 is set according to the amount of displacement for a predetermined alignment state (coordinate center O in the figure), and an area L3 corresponding to level 3 is ± with respect to the center O.
If the error range is within 0.1 mm, the weight is 100; if the level 2 region L2 is within ± 0.2 mm, the weight is 50; if the level 1 region L1 is within ± 0.4 mm, the error range is within ± 0.4 mm. The weight is set to 10.
【００２２】このように位置合わせ誤差に応じた重みを
設定し、重みを加えた検知結果、例えば得られる検出値
Ｘ、Ｙ、Ｄからそのときのレベルを逐次に求め、求めた
レベルに対応する重みを、そのレベルが得られている時
間検出回数で積分した結果が所定値以上になったとき
に、演算回路１８からの制御信号で図示しない検眼測定
系により被検眼Ｅの情報を得るようにしている。このよ
うにすることにより、被検眼Ｅの状態に合った条件を単
一の評価尺度で設定することができる。In this way, weights are set according to the alignment error, and the levels at that time are sequentially obtained from the weighted detection results, for example, obtained detection values X, Y, D, and correspond to the obtained levels. When the result of integrating the weights by the number of times of detection for which the level is obtained becomes a predetermined value or more, the control signal from the arithmetic circuit 18 is used to obtain the information of the eye E by an optometry system (not shown). ing. By doing so, the condition suitable for the state of the eye E can be set with a single evaluation scale.
【００２３】例えば、この検出光学系はビデオ信号によ
り位置合わせ検出を行うので、最大１秒間に３０回の検
出が可能であるが、実際には処理時間などを考慮して、
１秒間に１０回即ち１回当たり０．１秒の割合で検出す
るものとして、レベル１の状態が０．５秒間続けば、こ
の間被検眼Ｅは安定して固視していると判断されるもの
と設定すると、自動測定の条件（所定値）は１００×５
＝５００となる。このように設定すると、位置合わせ検
出結果から予め設定された重みをその都度積算して、そ
の総和が５００を越えた場合に自動測定を開始するとい
うことになり、被検眼Ｅの固視が不安定で±０．２ｍｍ
以内に位置合わせができない場合でも１秒間で測定が開
始されることになる。For example, since this detection optical system detects the alignment by the video signal, the detection can be performed up to 30 times per second, but in actuality, considering the processing time, etc.
Assuming that detection is performed 10 times per second, that is, 0.1 second per detection, and the level 1 state continues for 0.5 seconds, it is determined that the eye E to be inspected is stably fixed during this period. If set to "1", the condition for automatic measurement (predetermined value) is 100 x 5
= 500. With this setting, preset weights are added up each time from the alignment detection result, and when the total exceeds 500, automatic measurement is started, and the fixation of the eye E to be examined is unsuccessful. Stable ± 0.2 mm
Even if the alignment cannot be done within one second, the measurement will be started in one second.
【００２４】このような制御を行えば、固視が不安定で
位置合わせがうまく行かず、偶然に位置合わせ状態が良
いと検知された場合でも、直ちに測定を開始するような
ことはなく、また固視が不安定でどうしてもレベル２以
上に位置合わせができない場合に、何時までも測定が行
われない等というような不都合を回避することができ
る。By performing such control, the fixation is unstable and the alignment is not successful, and even if it is accidentally detected that the alignment is good, the measurement is not started immediately, and It is possible to avoid the inconvenience that the measurement is not performed forever when the fixation is unstable and the position cannot be adjusted to the level 2 or higher.
【００２５】実際に重みの掛け方等の自動測定の条件
は、多数の被検眼Ｅを測定しそれらを解析して最適なも
のを選択すればよい。これらの条件判断をする制御は制
御手段１８としてＣＰＵを使用して行う。従って、スク
リーニング的測定なので位置合わせ精度はあまり高くな
くてもよいが、測定を迅速に行いたい場合や、多少時間
が掛かってもより正確に位置合わせを行って測定を行い
たい場合等の自動測定条件を、検者がキーボード等の図
示しない入力装置で変更できるようにすることが可能で
ある。Actual conditions for automatic measurement such as weighting may be determined by measuring a large number of eyes E to be inspected and analyzing them. The control for judging these conditions is performed by using a CPU as the control means 18. Therefore, since it is a screening measurement, the alignment accuracy does not have to be very high, but if you want to perform the measurement quickly, or if you want to perform the alignment more accurately even if it takes some time, the automatic measurement It is possible to allow the examiner to change the condition with an input device (not shown) such as a keyboard.
【００２６】また、重みの総和から測定条件を判断する
方式の他に、以下の方法も可能である。即ち、各ゾーン
における測定回数を予め設定しておいて、例えば検知結
果が３回連続してレベル１にあれば測定を開始し、検知
結果がレベル２の場合は１０回連続してレベル２にあれ
ば測定を開始するようにする。更に、レベル１の場合は
１回しか滞在せず、２回目に検知したときにはレベル２
に変化したような場合にも、３回目、４回目にレベル１
に戻ったときには測定を実行するようにし、レベル２以
上の状態では連続していなければ測定を実行しないよう
にするなど、精度の状態を示す領域間の遷移状態によっ
ても、測定条件を変化させて最適条件を設定する。これ
により、信頼度の高い測定を行うことができる。In addition to the method of determining the measurement condition from the sum of weights, the following method is also possible. That is, the number of times of measurement in each zone is set in advance. For example, if the detection result is level 1 for three consecutive times, the measurement is started, and if the detection result is level 2, it is set to level 2 for 10 consecutive times. If so, start the measurement. Furthermore, in the case of level 1, it stays only once, and when it is detected the second time, level 2
Even if it changes to, it will be level 1 on the 3rd and 4th times.
The measurement condition may be changed depending on the transition state between the regions indicating the accuracy state, such as performing the measurement when returning to the step 1, and not performing the measurement when the level is 2 or higher. Set the optimum conditions. Thereby, highly reliable measurement can be performed.
【００２７】また、図１の光学系を上下、左右、前後に
駆動する駆動装置を設け、位置合わせ検出結果を基に予
め設定した測定条件に従って駆動装置を駆動し、自動的
に位置合わせ及び測定を行うようにすれば、検者が粗ア
ライメントを行った時点で測定スイッチを押すことによ
り、自動的に被検眼Ｅとの位置合わせを行って測定を行
う全自動眼科装置が実現できる。更に、検者を必要とせ
ずに、被検者自身で粗アライメントを行って測定する自
己測定眼科装置も容易に実現することができる。Further, a driving device for driving the optical system of FIG. 1 up, down, left and right, front and back is provided, and the driving device is driven according to preset measurement conditions based on the alignment detection result, and the alignment and measurement are automatically performed. By performing the above, it is possible to realize a fully automatic ophthalmologic apparatus that automatically performs the alignment with the eye E to be measured by pressing the measurement switch when the examiner performs the rough alignment. Furthermore, it is possible to easily realize a self-measurement ophthalmologic apparatus that performs rough alignment by the subject himself or herself without requiring an examiner.
【００２８】[0028]
【発明の効果】以上説明したように本発明に係る眼科装
置は、被検眼と装置との位置合わせを所定方向で逐次に
検知し、その検知結果に基づいて被検眼の情報を得る条
件を変化させるようにすることにより、被検眼の状態に
よって位置合わせ状態が良い場合には迅速に位置合わせ
を行い、状態が悪い場合には時間を掛けて正確な位置合
わせ状態になるように調整することができ、被検眼の角
膜の状態に拘らず常に位置合わせ誤差を検知することが
できるので、誤判断を防止して信頼度の高い眼科測定を
行うことができる。As described above, the ophthalmologic apparatus according to the present invention sequentially detects the alignment between the eye to be inspected and the apparatus in a predetermined direction, and changes the condition for obtaining information on the eye to be inspected based on the detection result. By doing so, when the alignment condition is good depending on the condition of the eye to be inspected, it is possible to quickly perform the alignment, and when the alignment condition is bad, it is possible to take time to adjust so that the alignment condition is accurate. Since it is possible to always detect the alignment error regardless of the state of the cornea of the eye to be inspected, it is possible to prevent misjudgment and perform highly reliable ophthalmological measurement.
【図１】実施例の斜視図である。FIG. 1 is a perspective view of an embodiment.
【図２】複数開口を有する絞りの正面図である。FIG. 2 is a front view of a diaphragm having a plurality of openings.
【図３】開口と光偏向部材の側面図である。FIG. 3 is a side view of an opening and a light deflecting member.
【図４】位置合わせ完了時の撮像素子上の画像の説明図
である。FIG. 4 is an explanatory diagram of an image on the image sensor when the alignment is completed.
【図５】位置合わせ誤差と重みの説明図である。FIG. 5 is an explanatory diagram of alignment error and weight.
【図６】従来例の光学系の構成図である。FIG. 6 is a configuration diagram of a conventional optical system.
【図７】位置合わせ検知状態の説明図である。FIG. 7 is an explanatory diagram of an alignment detection state.
【図８】被検眼の動きと測定のタイミングの説明図であ
る。FIG. 8 is an explanatory diagram of the movement of the eye to be inspected and the timing of measurement.
１１ 対物レンズ １２ ハーフミラー １３ 複数開口絞り １４ 結像レンズ １５ 撮像素子 １６ 投影レンズ １７ 光源 １８ 演算回路 １９ｂ、１９ｃ 光偏向部材 11 Objective Lens 12 Half Mirror 13 Plural Aperture Stop 14 Imaging Lens 15 Imaging Element 16 Projection Lens 17 Light Source 18 Arithmetic Circuit 19b, 19c Light Deflection Member
フロントページの続き (72)発明者 嶋下 聡 神奈川県川崎市中原区今井上町53番地 キ ヤノン株式会社小杉事業所内 (72)発明者 正木 俊文 神奈川県川崎市中原区今井上町53番地 キ ヤノン株式会社小杉事業所内Front page continued (72) Inventor Satoshi Shimashita 53 Imaiue-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Canon Inc. Kosugi Plant (72) Inventor Toshifumi Masaki 53 Imaiue-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Canon Inc. Kosugi Office
Claims (6)
に検知する位置検出手段を有し、該位置検出手段から得
られる位置合わせ誤差に基づいて自動的に被検眼の情報
を得る眼科装置において、前記被検眼の情報を得るため
の条件を前記位置合わせ誤差の状態に応じて異ならせて
設定する条件設定手段を有することを特徴とする眼科装
置。1. An ophthalmologic apparatus having position detection means for sequentially detecting the alignment state between the eye to be inspected and the apparatus, and automatically obtaining information on the eye to be inspected based on the alignment error obtained from the position detection means. 2. The ophthalmologic apparatus according to claim 1, further comprising a condition setting unit that sets a condition for obtaining the information of the eye to be inspected differently according to the state of the alignment error.
せ誤差に応じて設定された重みを前記位置検出手段の信
号から算出して逐次に加算する演算手段と、該加算され
た結果を予め設定された値と比較する比較手段とから成
る請求項１に記載の眼科装置。2. The condition setting means calculates a weight preset according to the alignment error from the signal of the position detecting means and sequentially adds the weight, and presets the added result. An ophthalmologic apparatus according to claim 1, comprising a comparison means for comparing the calculated value.
手段を有する請求項１に記載の眼科装置。3. The ophthalmologic apparatus according to claim 1, further comprising input means for changing the preset weight.
置合わせ誤差に応じて設定された複数の領域と、該領域
内の滞在時間とにより変化させるようにした請求項１に
記載の眼科装置。4. The ophthalmology according to claim 1, wherein the condition for obtaining the information of the eye to be inspected is changed depending on a plurality of regions set according to the alignment error and a staying time within the regions. apparatus.
記位置検出手段の検出結果に基づいて前記駆動手段を駆
動して前記被検眼と前記装置との位置合わせを行う請求
項１に記載の眼科装置。5. The driving means for driving the device is provided, and the driving means is driven based on the detection result of the position detecting means to align the eye to be inspected with the device. Ophthalmic equipment.
に検知する位置検知手段と、該位置検知手段から得られ
る位置合わせ状態が所定条件を満足するか否かに基づい
て自動的に被検眼情報を得るための制御手段とを有し、
該制御手段は前記位置検知手段から得られる位置合わせ
状態が、位置合わせ誤差の程度に応じて異なる度合いで
所定条件を満足するか否かの判断に使用することを特徴
とする眼科装置。6. A position detecting means for sequentially detecting a state of alignment between an eye to be inspected and an apparatus, and automatically detecting whether or not the state of alignment obtained from the position detecting means satisfies a predetermined condition. Having a control means for obtaining optometry information,
An ophthalmologic apparatus characterized in that the control means is used to judge whether or not the alignment state obtained from the position detection means satisfies a predetermined condition at different degrees depending on the degree of the alignment error.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27695495A JP3625323B2 (en) | 1995-09-29 | 1995-09-29 | Ophthalmic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27695495A JP3625323B2 (en) | 1995-09-29 | 1995-09-29 | Ophthalmic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0994227A true JPH0994227A (en) | 1997-04-08 |
| JP3625323B2 JP3625323B2 (en) | 2005-03-02 |
Family
ID=17576733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27695495A Expired - Fee Related JP3625323B2 (en) | 1995-09-29 | 1995-09-29 | Ophthalmic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3625323B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001346764A (en) * | 2000-06-08 | 2001-12-18 | Topcon Corp | Eyeground camera |
| US6685318B2 (en) | 2000-02-24 | 2004-02-03 | Canon Kabushiki Kaisha | Ophthalmologic apparatus |
| JP2010162424A (en) * | 2010-05-07 | 2010-07-29 | Canon Inc | Ophthalmic apparatus |
| JP4700785B2 (en) * | 2000-05-30 | 2011-06-15 | キヤノン株式会社 | Ophthalmic equipment |
| WO2014203625A1 (en) * | 2013-06-18 | 2014-12-24 | オリンパスメディカルシステムズ株式会社 | Endoscope system and method of controlling endoscope system |
-
1995
- 1995-09-29 JP JP27695495A patent/JP3625323B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6685318B2 (en) | 2000-02-24 | 2004-02-03 | Canon Kabushiki Kaisha | Ophthalmologic apparatus |
| JP4700785B2 (en) * | 2000-05-30 | 2011-06-15 | キヤノン株式会社 | Ophthalmic equipment |
| JP2001346764A (en) * | 2000-06-08 | 2001-12-18 | Topcon Corp | Eyeground camera |
| JP2010162424A (en) * | 2010-05-07 | 2010-07-29 | Canon Inc | Ophthalmic apparatus |
| WO2014203625A1 (en) * | 2013-06-18 | 2014-12-24 | オリンパスメディカルシステムズ株式会社 | Endoscope system and method of controlling endoscope system |
| CN104981198A (en) * | 2013-06-18 | 2015-10-14 | 奥林巴斯株式会社 | Endoscope system and control method for endoscope system |
| EP2926714A4 (en) * | 2013-06-18 | 2016-07-13 | Olympus Corp | Endoscope system and method of controlling endoscope system |
| US9579011B2 (en) | 2013-06-18 | 2017-02-28 | Olympus Corporation | Endoscope system that controls laser output of laser probe and control method for endoscope system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3625323B2 (en) | 2005-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4824400B2 (en) | Ophthalmic equipment | |
| EP1935330A1 (en) | Ophthalmologic apparatus | |
| JPH0265836A (en) | Visual axis detector and camera equipped therewith | |
| US20030097053A1 (en) | Noncontact ophthalmotonometer | |
| JP4533013B2 (en) | Ophthalmic equipment | |
| KR101637944B1 (en) | Ophthalmologic apparatus and alignment method | |
| KR100603005B1 (en) | Ophthalmologic apparatus | |
| JP4136690B2 (en) | Ophthalmic equipment | |
| JPH0966027A (en) | Opthalmologic system | |
| US6164778A (en) | Corneal endothelial cell photographing apparatus | |
| JP3625323B2 (en) | Ophthalmic equipment | |
| US5042940A (en) | Optical measuring apparatus for examining eye | |
| JPH02264632A (en) | Sight line detector | |
| JP3576656B2 (en) | Alignment detection device for ophthalmic instruments | |
| JPH0975308A (en) | Corneal endothelial cell photographing device | |
| JP4136691B2 (en) | Ophthalmic equipment | |
| JPH08562A (en) | Position detector for ophthalmological equipment | |
| JPH035810B2 (en) | ||
| JP3068625B2 (en) | Ophthalmic equipment | |
| JP3085679B2 (en) | Eye refractometer | |
| JP4412998B2 (en) | Eye refractive power measuring device | |
| JP2001231753A (en) | Opthalmometer | |
| JPH1043137A (en) | Ophthalmologic device | |
| JPH1043136A (en) | Ophthalmologic device | |
| JP3497007B2 (en) | Ophthalmic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040511 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040601 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040721 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20041124 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20041129 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081210 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081210 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091210 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091210 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101210 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111210 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121210 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131210 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |