JPH0471526A - Fundus camera - Google Patents

Fundus camera

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Publication number
JPH0471526A
JPH0471526A JP2183380A JP18338090A JPH0471526A JP H0471526 A JPH0471526 A JP H0471526A JP 2183380 A JP2183380 A JP 2183380A JP 18338090 A JP18338090 A JP 18338090A JP H0471526 A JPH0471526 A JP H0471526A
Authority
JP
Japan
Prior art keywords
aperture
eye
pupil diameter
recording mode
photographing
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.)
Pending
Application number
JP2183380A
Other languages
Japanese (ja)
Inventor
Hiroyuki Otsuka
浩之 大塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Topcon Corp
Original Assignee
Topcon Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Topcon Corp filed Critical Topcon Corp
Priority to JP2183380A priority Critical patent/JPH0471526A/en
Publication of JPH0471526A publication Critical patent/JPH0471526A/en
Pending legal-status Critical Current

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  • Eye Examination Apparatus (AREA)

Abstract

PURPOSE:To satisfactorily photograph an eye with a small pupil diameter and continuously photograph it even when photographing fails by providing a means switching the aperture of an optical system in response to the pupil diameter of the checked eye and a means switching the photographing mode from the film recording mode to the electronic image recording mode. CONSTITUTION:When an aperture switching means 25 is operated in response to the pupil diameter of an eye to be checked 12, an illumination system aperture 13 or a photographic system aperture 24 in the optical path of an optical system is switched, the signal output of the aperture switching means 25 is inputted to a recording mode switching means 27, and the switching means controls a luminescence control means 28 to perform film recording or electronic image recording based on the signal output. Film recording can be satisfactorily performed even when the light quantity is insufficient, if no stroboscopic luminescence is required for photographing the checked eye 12 with a small pupil diameter, luminescence may be prohibited in conjunction with the aperture switching, if stroboscopic luminescence is required, luminescence may be used. Even when the photographing of film recording fails and the pupil is shrunk by stroboscopic luminescence, the checked eye 12 can be continuously photographed.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、露光不足等が生じて良好にフィルム記録を行
なうことができない小瞳孔径の被検眼であっても、眼底
を良好に撮影できる眼底カメラに関する。
[Detailed Description of the Invention] (Industrial Application Field) The present invention enables good imaging of the fundus even in the case of an eye to be examined with a small pupil diameter in which good film recording cannot be performed due to insufficient exposure, etc. Regarding the fundus camera.

(従来の技術) 従来の眼底カメラには、変倍に応じて撮影フィルム上の
霧光量が一定になるように、照明絞り、撮影絞り、撮影
光量のうちいずれか一つ、またはこれらのいくつかを組
み合わせて露光量の調整を図っているものがある。また
、リングスリット照明の遮光部の遮光領域を被検眼の瞳
孔径に応じて変えているものもある。
(Prior art) Conventional fundus cameras have one or more of the following: an illumination diaphragm, a photographic diaphragm, and a photographic light amount, so that the amount of fog on the photographic film remains constant as the magnification changes. Some systems use a combination of these methods to adjust the exposure amount. Furthermore, there is also a ring slit illumination in which the light shielding area of the light shielding part is changed depending on the pupil diameter of the eye to be examined.

例えば、特公昭61−44499号公報は、変倍に応じ
て被検眼の水晶体と共役な遮光物を変更(光軸方向に移
動させるか若しくは移動させないで寸法を変えるか)す
ることによって照明光量を調整する構成としている。
For example, Japanese Patent Publication No. 61-44499 discloses that the amount of illumination light can be increased by changing the light shielding object that is conjugate with the crystalline lens of the subject's eye (move it in the optical axis direction or change its dimensions without moving it) according to the magnification change. It is configured to be adjusted.

また、特公昭62−54497号公報は、変倍に応じて
被検眼の瞳孔と共役なリングスリットの断面積を変えて
光量を調整する構成としている。
Further, Japanese Patent Publication No. 62-54497 has a configuration in which the cross-sectional area of a ring slit conjugate with the pupil of the eye to be examined is changed in accordance with the change in magnification to adjust the amount of light.

(発明が解決しようとする課題) しかしながら、従来の眼底カメラは、 ■アライメントの容易性、 ■照明光量増加による被検眼への影響(特に、眩しさを
できるだけ与えないようにする配慮)、■装置の大きさ
、 等を総合的に判断して、良好にフィルム記録を行なうこ
とができる最小瞳孔径を4mmとしていた。
(Problems to be solved by the invention) However, conventional fundus cameras have the following problems: ■ Ease of alignment, ■ Impact on the eye to be examined due to increased illumination light intensity (in particular, consideration should be given to minimizing glare), ■ Equipment The minimum pupil diameter for good film recording was determined to be 4 mm, after comprehensively determining the size of the pupil and the like.

従って、瞳孔径が4mm以下の場合には光量不足等によ
り鮮明な眼底像を得ることができない不都合があった。
Therefore, when the pupil diameter is 4 mm or less, there is a problem that a clear fundus image cannot be obtained due to insufficient light quantity, etc.

また、光量不足を解消するために照明光量を増加させる
と写真にフレア等が発生する不都合もあった。
Furthermore, when the amount of illumination light is increased in order to resolve the insufficient amount of light, there is also the problem that flare and the like occur in photographs.

さらに、無散瞳眼底カメラでは、ストロボを発光させた
ときに、被検者の瞬き岬があると、撮影が失敗すること
になるが、被検眼がストロボ発光による照明により縮瞳
してしまうので、続けてもう一度撮影したいにも拘らず
、被検眼が自然散瞳するまで長時間待たなければならな
い不都合がある。このような場合でも、すぐに撮影をで
きるようにすることが望ましい。
Furthermore, with a non-mydriatic fundus camera, if the subject's blinking cape is present when the strobe is emitted, the image will fail; However, there is the inconvenience of having to wait for a long time until the subject's eye naturally dilates, even though the subject wants to take another picture. Even in such a case, it is desirable to be able to take pictures immediately.

そこで、本発明の目的は、被検眼の瞳孔径が、フィルム
記録を行なうと支障が生じる限界と考えられる所定値よ
りも小さい瞳孔径であっても良好に撮影を行なうことが
でき、また、撮影に失敗した場合でも長時間待つことな
く、続けて撮影を行なうことができる眼底カメラを提供
することにある。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to enable good imaging even if the pupil diameter of the eye to be examined is smaller than a predetermined value that is considered to be the limit that would cause problems when recording on film. To provide a fundus camera capable of continuously photographing without waiting for a long time even if the camera fails.

(課題を解決するための手段) 本発明に係る眼底カメラは上記の目的を達成するために
、 被検眼の瞳孔径に対応して、光学系の光路中の絞りを切
り換える絞り切換手段と、撮影モードをフィルム記録モ
ードから電子映像記録モードに切り換える記録モード切
換手段とを有することを特徴としている。
(Means for Solving the Problems) In order to achieve the above object, the fundus camera according to the present invention includes an aperture switching means for switching the aperture in the optical path of the optical system according to the pupil diameter of the eye to be examined; The present invention is characterized by comprising recording mode switching means for switching the mode from film recording mode to electronic video recording mode.

(作用) 本発明によれば、被検眼の瞳孔径に対応して絞り切換手
段を操作すると、光学系の光路中の絞りが切換えられる
。すなわち、照明系又は撮影系の絞りが切換えられ、か
つ、フィルム記録モードから電子映像記録モードに切換
えられるので、フィルム記録を行なうにあたり光量が十
分でなくても良好に記録をおこなうことができる。また
、小瞳孔径の被検眼の撮影の際にストロボ発光が不要な
場合は絞りの切換えに連動して発光を禁止してもよく、
ストロボ発光が必要な場合は発光させてもよい、さらに
、フィルム記録の撮影を失敗して、ストロボ発光により
縮瞳している場合であっても続けて撮影できる。
(Function) According to the present invention, when the aperture switching means is operated in accordance with the pupil diameter of the eye to be examined, the aperture in the optical path of the optical system is switched. That is, since the aperture of the illumination system or the photographing system is switched and the film recording mode is switched to the electronic video recording mode, good recording can be performed even if the amount of light is insufficient for film recording. In addition, if strobe light emission is not necessary when photographing an eye to be examined with a small pupil diameter, flash emission may be prohibited in conjunction with switching the aperture.
If strobe light emission is necessary, it may be emitted.Furthermore, even if the photographing for film recording fails and the pupils are constricted due to strobe light emission, photography can be continued.

(実施例) 以下に、本発明に係る眼科装置の実施例を図面を参照し
つつ説明する。
(Example) Hereinafter, an example of the ophthalmologic apparatus according to the present invention will be described with reference to the drawings.

第1図は本発明の第1実施例の構成を示すブロック図で
あって、1は凹面鏡、2は観察光源としてのハロゲンラ
ンプ、3はリレーレンズ、4は撮影光源としてのキセノ
ンランプ、5はコンデンサーレンズで、凹面鏡1、ハロ
ゲンランプ2、リレーレンズ3、キセノンランプ4、コ
ンデンサーレンズ5は、光軸6にこの順番で設けられて
いる。
FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention, in which 1 is a concave mirror, 2 is a halogen lamp as an observation light source, 3 is a relay lens, 4 is a xenon lamp as a photographing light source, and 5 is a xenon lamp as a photographing light source. In the condenser lens, a concave mirror 1, a halogen lamp 2, a relay lens 3, a xenon lamp 4, and a condenser lens 5 are provided in this order on an optical axis 6.

これらの光学部材1〜5は、ミラー7、投影レンズ8、
孔あきミラー9、対物レンズ10と共に照明光学系を構
成している。対物レンズ10には被検眼12が対向して
いる。コンデンサーレンズ5とミラー7の間には照明絞
り13が配置されている。この照明絞り13は絞り13
a、13bを有する。絞り13aは投影レンズ8に関し
て被検眼12の虹彩と共役である。
These optical members 1 to 5 include a mirror 7, a projection lens 8,
Together with the perforated mirror 9 and the objective lens 10, it constitutes an illumination optical system. An eye 12 to be examined faces the objective lens 10 . An illumination diaphragm 13 is arranged between the condenser lens 5 and the mirror 7. This illumination aperture 13 is the aperture 13
a, 13b. The aperture 13a is conjugate with the iris of the eye 12 to be examined with respect to the projection lens 8.

絞り13bは投影レンズ8に関して被検眼12の角膜と
共役である。一方、対物レンズ10の光軸11上には、
被検眼12に近い方から順に対物レンズ10、孔あきミ
ラー9、合焦レンズ14、結像レンズ15、クイックリ
ターンミラー16、フィルム17が設けられている。ク
イックリターンミラー16の反射光軸18上には、クイ
ックリターンミラー19、撮像集子20が設けられてい
る。クイックリターンミラー19の反射光軸21上には
、接眼スケール22、接眼レンズ23が設けられている
。検者はこの接眼スケール22上に映し出された被検眼
12の眼底を接眼レンズ23を介して観察する。孔あき
ミラー9と合焦レンズ14の間には撮影絞り24が配置
されている。
The aperture 13b is conjugate with the cornea of the eye 12 to be examined with respect to the projection lens 8. On the other hand, on the optical axis 11 of the objective lens 10,
An objective lens 10, a perforated mirror 9, a focusing lens 14, an imaging lens 15, a quick return mirror 16, and a film 17 are provided in order from the one closest to the eye 12 to be examined. A quick return mirror 19 and an imaging collector 20 are provided on the reflection optical axis 18 of the quick return mirror 16. An eyepiece scale 22 and an eyepiece lens 23 are provided on the reflection optical axis 21 of the quick return mirror 19. The examiner observes the fundus of the subject's eye 12 projected on the eyepiece scale 22 through the eyepiece lens 23. A photographic aperture 24 is arranged between the perforated mirror 9 and the focusing lens 14.

照明絞り13、撮影絞り24は瞳孔径に対応して、それ
ぞれ二種類設けられている。照明絞り13はフィルム記
録に支障が生じない瞳孔径のときに光路内に挿入される
絞り13′ とフィルム記録では支障が生じる瞳孔径の
ときに光路内に挿入される絞り13#とから構成されて
いる。撮影絞り24も同様にフィルム記録に支障が生じ
ない瞳孔径のときに光路内に挿入される絞り24′ と
フィルム記録では支障が生じる瞳孔径のときに光路内に
挿入される絞り24”とから構成されている。照明絞り
13、撮影絞り24は絞り切換手段25を操作すること
によって光路内に挿入されるものである。絞り切換手段
25はロータリー式であり、 「O」位置はフィルム記
録に支障が生じない瞳孔径のときに選択するもので、 
rQJ位置では照明絞り13′  撮影絞り24′がそ
れぞれ光路内に挿入されている。 「1」〜「3」位置
はフィルム記録では支障が生じる瞳孔径のときに選択す
るもので、 「1」位置では照明絞り13′が切り換え
られて照明絞り13#が光路内に挿入される。 「2」
位置では撮影絞り24′が切り換えられて撮影絞り24
′′が光路内に挿入される。
Two types of illumination diaphragm 13 and photographic diaphragm 24 are provided, each corresponding to the pupil diameter. The illumination diaphragm 13 consists of a diaphragm 13' that is inserted into the optical path when the pupil diameter is such that it does not interfere with film recording, and a diaphragm 13# that is inserted into the optical path when the pupil diameter is such that it does not interfere with film recording. ing. Similarly, the photographic aperture 24 has two types: a diaphragm 24' that is inserted into the optical path when the pupil diameter is such that it does not interfere with film recording, and a diaphragm 24'' that is inserted into the optical path when the pupil diameter is such that it does not interfere with film recording. The illumination diaphragm 13 and the photographic diaphragm 24 are inserted into the optical path by operating the diaphragm switching means 25.The diaphragm switching means 25 is of a rotary type, and the "O" position is set for film recording. This is selected when the pupil diameter does not cause any problems.
At the rQJ position, an illumination diaphragm 13' and a photographic diaphragm 24' are inserted into the optical path. Positions "1" to "3" are selected when the pupil diameter causes problems in film recording, and at the "1" position, the illumination diaphragm 13' is switched and the illumination diaphragm 13# is inserted into the optical path. "2"
At the position, the photographing aperture 24' is switched to the photographing aperture 24'.
'' is inserted into the optical path.

「3」位置では照明絞り13′  撮影絞り24′の双
方が切り換えられて、照明絞り13#  撮影絞り24
″の双方がそれぞれ光路内に挿入される。
At the "3" position, both the illumination diaphragm 13' and the photographic diaphragm 24' are switched, and the illumination diaphragm 13# and the photographic diaphragm 24 are switched.
'' are respectively inserted into the optical path.

第2図〜第4図は、絞り切換手段25の各位置を選択し
た際の照明絞り13、撮影絞り24の切換に基づく孔あ
きミラー9上での照明光の光束40および撮影光の光束
41を合焦レンズ15側から見た図である。第2図では
照明絞り13′  撮影絞り24′を光路内に挿入した
場合を、第3図では照明絞り13#撮影絞り24′を光
路内に挿入した場合を、第4図では照明絞り13″ 撮
影絞り24″を光路内に挿入した場合をそれぞれ示して
いる。なお、図中9aは孔あきミラー9の孔である。
2 to 4 show a luminous flux 40 of illumination light and a luminous flux 41 of photographic light on the perforated mirror 9 based on switching of the illumination diaphragm 13 and photographing diaphragm 24 when each position of the diaphragm switching means 25 is selected. FIG. 2 is a diagram seen from the focusing lens 15 side. Figure 2 shows the case where the illumination diaphragm 13' and photography diaphragm 24' are inserted into the optical path, Figure 3 shows the case where the illumination diaphragm 13' and photography diaphragm 24' are inserted into the optical path, and Figure 4 shows the case where the illumination diaphragm 13' and photography diaphragm 24' are inserted into the optical path. Each figure shows the case where the photographing aperture 24'' is inserted into the optical path. In addition, 9a in the figure is a hole of the perforated mirror 9.

検者は被検眼12の瞳孔径を確認して、その大きさがフ
ィルム記録することができる大きさであるか、否かを判
断した上で、絞り切換手段25を操作する。絞り切換手
段25からの信号は絞り駆動回路26に入力される。絞
り駆動回路26はその絞り切換手段25の選択された位
置に応じて絞りを切り換える。絞り切換手段25の信号
出力は記録モード切換手段27に入力されている。そし
て、この記録モード切換手段27は信号出力に基づいて
フィルム記録または電子映像記録を行なうように発光制
御手段28を制御する。クイックリターンミラー16は
フィルム記録モードのときは、撮影スイッチ28を操作
すると光路から退避させられ、撮影終了後は光路内に自
動的に復帰させられる。クイックリターンミラー19は
電子映像記録モードのときは、撮影スイッチ29を操作
すると光路かも退避させられ、撮影終了後は光路内に自
動的に復帰させられる。発光制御手段28はフィルム記
録モードのときにキセノンランプ4を発光させると共に
シャッター駆動回路30をキセノンランプ4の発光とほ
ぼ同時に駆動させる。シャッター駆動回路30はシャッ
ター31を制御する。一方、電子映像記録モードのとき
は、発光制御手段28は撮影スイッチ29の操作により
キセノンランプ4を発光させる必要がある場合には発光
させ、発光させる必要がない場合には発光させない。
The examiner confirms the pupil diameter of the eye 12 to be examined, determines whether or not it is large enough to be recorded on film, and then operates the aperture switching means 25. A signal from the aperture switching means 25 is input to an aperture drive circuit 26. The aperture driving circuit 26 switches the aperture according to the selected position of the aperture switching means 25. The signal output from the aperture switching means 25 is input to the recording mode switching means 27. The recording mode switching means 27 controls the light emission control means 28 to perform film recording or electronic image recording based on the signal output. In the film recording mode, the quick return mirror 16 is moved out of the optical path when the photographing switch 28 is operated, and is automatically returned to the optical path after photographing is completed. When the quick return mirror 19 is in the electronic image recording mode, the optical path is also moved out of the way when the photographing switch 29 is operated, and the quick return mirror 19 is automatically returned to the optical path after photographing is completed. The light emission control means 28 causes the xenon lamp 4 to emit light in the film recording mode, and also drives the shutter drive circuit 30 almost simultaneously with the light emission of the xenon lamp 4. A shutter drive circuit 30 controls a shutter 31. On the other hand, in the electronic video recording mode, the light emission control means 28 causes the xenon lamp 4 to emit light when it is necessary to emit light by operating the photographing switch 29, and does not cause it to emit light when it is not necessary to emit light.

本発明に係る眼底カメラによればフィルム記録に支障が
生じる瞳孔径であっても、絞りを切り換えることにより
、支障なく撮影できる。
According to the fundus camera according to the present invention, even if the pupil diameter causes a problem in film recording, it can be photographed without any problem by switching the aperture.

第5図は本発明の第2実施例を示すブロック図であるが
、第1実施例と同一構成要素については符号のみを付し
て重複する説明は省くこととする。
FIG. 5 is a block diagram showing a second embodiment of the present invention, and the same components as those in the first embodiment are given only the reference numerals and redundant explanation will be omitted.

この第2実施例では、対物レンズ10と孔あきミラー9
の間に可動式のハーフミラ−(または波長分割ミラー)
32が配置されている。その反射光軸33上に、リレー
レンズ34が配置されている。ハーフミラ−32とリレ
ーレンズ34の間には、被検眼12の瞳孔と、対物レン
ズ10に対して共役な結像点F1が結像される。そして
この結像点F1と、リレーレンズ34に対して共役な結
像点F2が結像される位置に撮像素子35の受光面が配
置されている。
In this second embodiment, an objective lens 10 and a perforated mirror 9 are used.
A movable half mirror (or wavelength division mirror) between
32 are arranged. A relay lens 34 is arranged on the reflection optical axis 33. An image point F1 that is conjugate to the pupil of the eye 12 and the objective lens 10 is formed between the half mirror 32 and the relay lens 34 . The light-receiving surface of the image sensor 35 is disposed at a position where an image point F2 conjugate to the image point F1 and the relay lens 34 is formed.

ハーフミラ−32は瞳孔径測定スイッチ36を操作する
と光路内に挿入される。検者が接眼レンズ24を介して
被検眼を観察して、瞳孔径測定スイッチ36を操作する
と撮像素子35に瞳孔像が結像される。
The half mirror 32 is inserted into the optical path when the pupil diameter measurement switch 36 is operated. When the examiner observes the eye to be examined through the eyepiece lens 24 and operates the pupil diameter measurement switch 36, a pupil image is formed on the imaging device 35.

撮像素子35には瞳孔径判断回路37が接続されており
、この瞳孔径判断回路37は撮像素子35の撮像出力に
基づき瞳孔径を算出する。この瞳孔径判断回路37は記
録モード切換手段27に接続されており、測定瞳孔径の
大きさに対応して記録モード切換手段27が作動して、
自動的にフィルム記録モードまたは電子映像記録モード
を選択する。
A pupil diameter determination circuit 37 is connected to the image sensor 35 , and the pupil diameter determination circuit 37 calculates the pupil diameter based on the imaging output of the image sensor 35 . This pupil diameter judgment circuit 37 is connected to the recording mode switching means 27, and the recording mode switching means 27 operates in accordance with the size of the measured pupil diameter.
Automatically select film recording mode or electronic video recording mode.

以上実施例について説明したが、キセノンランプ4、ハ
ロゲンランプ2の照明光量を増減変する構成とすること
もできる。このように構成すれば、小瞳孔径に対応させ
て絞りを切り換えた場合であっても良好な電子映像記録
画像を得ることができる。また、孔あきミラー9と撮影
絞り24との間に濃度可変のNDフィルターを設け、撮
影光量を増減する構成とすることもできる。
Although the embodiments have been described above, it is also possible to adopt a configuration in which the amount of illumination light from the xenon lamp 4 and the halogen lamp 2 is increased or decreased. With this configuration, it is possible to obtain a good electronic video recording image even when the aperture is switched in accordance with a small pupil diameter. Alternatively, a variable density ND filter may be provided between the perforated mirror 9 and the photographing aperture 24 to increase or decrease the amount of photographing light.

(発明の効果) 本発明に係る眼底カメラによれば、被検眼の瞳孔径がフ
ィルム記録を良好に行なうことができる瞳孔径よりも小
さい瞳孔径であっても、支障なく撮影を行なうことがで
きる。
(Effects of the Invention) According to the fundus camera according to the present invention, even if the pupil diameter of the eye to be examined is smaller than the pupil diameter that allows good film recording, imaging can be performed without any problem. .

また、撮影に失敗した場合でも長時間待つことなく、続
けて撮影を行なうことができる。
Further, even if the photographing fails, the photographing can be continued without waiting for a long time.

【図面の簡単な説明】[Brief explanation of drawings]

第1図〜第4図は本発明に係るwi底カメラの第1実施
例を示す図であって、第1図はその光学図、第2図〜第
4図は絞り切換手段の操作に基づく孔あきミラー上の照
明光束、撮影光束を示す図、第5図は第2実施例を示す
光学図である。
1 to 4 are diagrams showing a first embodiment of the Wi-bottom camera according to the present invention, in which FIG. 1 is an optical diagram thereof, and FIGS. 2 to 4 are diagrams based on the operation of the aperture switching means. FIG. 5 is an optical diagram showing the second embodiment.

Claims (4)

【特許請求の範囲】[Claims] (1)被検眼の瞳孔径に対応して、光学系の光路中の絞
りを切り換える絞り切換手段と、撮影モードをフィルム
記録モードから電子映像記録モードに切り換える記録モ
ード切換手段とを有することを特徴とする眼底カメラ。
(1) It is characterized by having an aperture switching means for switching the aperture in the optical path of the optical system in accordance with the pupil diameter of the eye to be examined, and a recording mode switching means for switching the shooting mode from a film recording mode to an electronic image recording mode. Fundus camera.
(2)照明光量と撮影光量との少なくとも一方を増減さ
せる照明撮影光量増減手段を有することを特徴とする請
求項1に記載の眼底カメラ。
(2) The fundus camera according to claim 1, further comprising an illumination/photography light amount increasing/decreasing means for increasing/decreasing at least one of the illumination light amount and the photographing light amount.
(3)被検眼の瞳孔径が小径のときに電子映像記録モー
ドで撮影を行なうことを特徴とする請求項1に記載の眼
底カメラ。
(3) The fundus camera according to claim 1, wherein imaging is performed in an electronic image recording mode when the pupil diameter of the eye to be examined is small.
(4)被検眼の瞳孔径を測定する測定手段と、瞳孔径が
所定値以下であるか否かを判断する判断手段とを備え、
小瞳孔に対応した絞りが光路に挿入されるように前記絞
り切換手段を制御するとともに前記電子映像記録モード
に切り換えるように前記記録モード切換手段を制御する
ことを特徴とする請求項3に記載の眼底カメラ。
(4) comprising a measuring means for measuring the pupil diameter of the eye to be examined, and a determining means for determining whether the pupil diameter is below a predetermined value;
4. The aperture switching means is controlled so that an aperture corresponding to a small pupil is inserted into the optical path, and the recording mode switching means is controlled so as to switch to the electronic image recording mode. fundus camera.
JP2183380A 1990-07-11 1990-07-11 Fundus camera Pending JPH0471526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2183380A JPH0471526A (en) 1990-07-11 1990-07-11 Fundus camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2183380A JPH0471526A (en) 1990-07-11 1990-07-11 Fundus camera

Publications (1)

Publication Number Publication Date
JPH0471526A true JPH0471526A (en) 1992-03-06

Family

ID=16134760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2183380A Pending JPH0471526A (en) 1990-07-11 1990-07-11 Fundus camera

Country Status (1)

Country Link
JP (1) JPH0471526A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122647A (en) * 2004-09-29 2006-05-18 Canon Inc Fundus photographing apparatus and photographing method therefor
JP2011172966A (en) * 2004-09-29 2011-09-08 Canon Inc Fundus photographing device
JP2017124214A (en) * 2017-03-13 2017-07-20 株式会社トプコン Ophthalmologic apparatus
JP2021053400A (en) * 2019-10-01 2021-04-08 オプトス ピーエルシー Ophthalmologic imaging apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122647A (en) * 2004-09-29 2006-05-18 Canon Inc Fundus photographing apparatus and photographing method therefor
JP2011172966A (en) * 2004-09-29 2011-09-08 Canon Inc Fundus photographing device
JP2017124214A (en) * 2017-03-13 2017-07-20 株式会社トプコン Ophthalmologic apparatus
JP2021053400A (en) * 2019-10-01 2021-04-08 オプトス ピーエルシー Ophthalmologic imaging apparatus
US11751765B2 (en) 2019-10-01 2023-09-12 Optos Plc Ophthalmic imaging device

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