JPH0523305A - Ophthalmologic camera - Google Patents
Ophthalmologic cameraInfo
- Publication number
- JPH0523305A JPH0523305A JP3182394A JP18239491A JPH0523305A JP H0523305 A JPH0523305 A JP H0523305A JP 3182394 A JP3182394 A JP 3182394A JP 18239491 A JP18239491 A JP 18239491A JP H0523305 A JPH0523305 A JP H0523305A
- Authority
- JP
- Japan
- Prior art keywords
- light
- illumination
- optical system
- eye
- observation
- 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]
【産業上の利用分野】本発明は被検眼への照明光量を自
動的に調節して露光量を調節することのできる眼科用撮
影装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmic photographing apparatus capable of automatically adjusting the amount of illumination light to an eye to be inspected to adjust the amount of exposure.
【0002】[0002]
【従来の技術】従来から、眼科用撮影装置には、発光強
度を一定とした撮影照明光による被検眼からの反射光の
光量を検出して適正露光量に達した時点で、撮影光源の
発光を停止させて適正露光量を得る構成のものが知られ
ている。2. Description of the Related Art Conventionally, in an ophthalmic photographing apparatus, when the amount of light reflected from the eye to be examined by the photographing illumination light having a constant emission intensity is detected and the appropriate exposure amount is reached, the light emitted from the photographing light source is emitted. There is known a configuration in which the exposure is stopped to obtain an appropriate exposure amount.
【0003】[0003]
【発明が解決しようとする課題】ところで、この種の眼
科用撮影装置においては、被検眼の撮影部位が過度に明
るすぎる場合には反射光量が過大となるので極短時間の
うちに適正露光量に達し、被検眼の撮影部位が過度に暗
すぎる場合には反射光量が過小となるので反射光束が相
対的に長い時間で適正露光量に達することになり、被検
眼の撮影部位からの反射光量が直接露光量に影響するた
め、被検眼からの反射光量が撮影中に変化する場合、た
とえば、固視微動のために眼底からの反射光量が変化す
る場合には、適正露光量を得ることが難しい。By the way, in this type of ophthalmic photographing apparatus, when the photographing region of the eye to be examined is excessively bright, the amount of reflected light becomes excessive, so that an appropriate exposure amount is obtained within an extremely short time. When the imaged region of the subject's eye is too dark, the amount of reflected light becomes too small, so the reflected light flux reaches the appropriate exposure amount in a relatively long time, and the amount of reflected light from the imaged region of the subject's eye. Directly affects the exposure amount, so that when the amount of reflected light from the subject's eye changes during imaging, for example, when the amount of reflected light from the fundus changes due to involuntary eye movement, an appropriate amount of exposure can be obtained. difficult.
【0004】そこで、本発明の目的は、被検眼に対する
適正露光量をより確実に得ることのできる眼科用撮影装
置を提供することにある。Therefore, an object of the present invention is to provide an ophthalmologic photographing apparatus which can more reliably obtain an appropriate exposure amount for an eye to be examined.
【0005】[0005]
【課題を解決するための手段】本発明の請求項1に記載
の眼科用撮影装置は、上記の課題を解決するため、被検
眼照明用の光源を有する照明光学系の途中に観察用の照
明光束の一部を抽出する照明光束抽出光学部材が設けら
れ、撮影光学系に被検眼からの観察用の照明光束の反射
光束を抽出する反射光束抽出光学部材が設けられ、前記
照明光束抽出光学部材により抽出された観察用の照明光
束の光量を基準として観察用の反射光束の光量との比で
ある反射率を演算により求める演算手段を備え、撮影光
源の発光量が演算手段により求められた反射率により制
御されることで撮影照明光量を適正光量とすることを特
徴とする。In order to solve the above-mentioned problems, the ophthalmic photographing apparatus according to claim 1 of the present invention has an illumination for observation in the middle of an illumination optical system having a light source for illumination of the eye to be examined. An illumination light flux extraction optical member that extracts a part of the light flux is provided, and a reflected light flux extraction optical member that extracts a reflected light flux of the illumination light flux for observation from the eye to be inspected is provided in the photographing optical system. The calculation means for calculating the reflectance, which is the ratio to the light quantity of the reflected light flux for observation, based on the light quantity of the illumination light flux for observation extracted by It is characterized in that the photographing illumination light amount is set to an appropriate light amount by being controlled by the rate.
【0006】本発明の請求項3に記載の眼科用撮影装置
は、前記照明光学系の途中に被検眼に対するピント合わ
せ用の指標を投影する指標投影光学系が設けられ、前記
撮影光学系には少なくとも反射率を検出している間指標
を遮蔽する遮光手段が設けられていることを特徴とす
る。According to a third aspect of the present invention, in the ophthalmic photographing apparatus, an index projection optical system for projecting an index for focusing on an eye to be inspected is provided in the illumination optical system, and the photographing optical system is provided. It is characterized in that a light shielding means is provided for shielding the index at least while detecting the reflectance.
【0007】[0007]
【作用】本発明に係わる請求項1に記載の眼科撮影用装
置によれば、照明光束抽出光学部材は観察用の照明光束
の一部を抽出する。反射光束抽出光学部材は撮影光学系
に被検眼からの観察用の照明光束の反射光束を抽出す
る。演算手段は照明光束抽出光学部材により抽出された
観察用の照明光束の光量を基準として観察用の反射光束
の光量との比である反射率を演算により求める。撮影光
源の発光量は演算手段により求められた反射率により制
御されることで撮影照明光量が制御される。According to the ophthalmic photographing apparatus of the first aspect of the present invention, the illumination light flux extracting optical member extracts a part of the illumination light flux for observation. The reflected light flux extraction optical member extracts a reflected light flux of the illumination light flux for observation from the eye to be inspected into the photographing optical system. The calculating means calculates the reflectance, which is a ratio with the light quantity of the illuminating light flux for observation extracted by the illuminating light flux extracting optical member, as a reference. The amount of light emitted from the photographing light source is controlled by the reflectance obtained by the calculation means, thereby controlling the amount of photographing illumination light.
【0008】また、請求項3に記載の眼科撮影用装置に
よれば、少なくとも反射率を検出している間、指標投影
光学系の指標が遮蔽される。Further, according to the ophthalmic photographing apparatus of the third aspect, the index of the index projection optical system is shielded at least while the reflectance is being detected.
【0009】[0009]
【実施例】以下に、本発明に係わる眼科撮影用装置の実
施例を眼底カメラについて適用した実施例を図面を参照
しつつ説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an ophthalmologic image taking apparatus according to the present invention will be described below with reference to the drawings in which an eye fundus camera is applied.
【0010】図1において、1は照明光学系であり、2
は撮影光学系である。In FIG. 1, reference numeral 1 denotes an illumination optical system, and 2
Is a photographing optical system.
【0011】照明光学系1は、観察光源3、コンデンサ
レンズ4、撮影光源5、コンデンサレンズ6、リング状
絞り7、リレーレンズ8、ミラー9、リレーレンズ10を
備えている。撮影光学系2は、被検眼11に対向する対物
レンズ12、孔空きミラー13、合焦レンズ14、結像レンズ
15、クイックリターンミラー16、シャッター17、フィル
ム18を備えている。リング状絞り7は、リレーレンズ
8、10、対物レンズ12に関して被検眼の瞳孔と略共役位
置に設けられている。The illumination optical system 1 comprises an observation light source 3, a condenser lens 4, a photographing light source 5, a condenser lens 6, a ring diaphragm 7, a relay lens 8, a mirror 9 and a relay lens 10. The photographing optical system 2 includes an objective lens 12 facing the eye 11 to be inspected, a perforated mirror 13, a focusing lens 14, and an imaging lens.
It is equipped with 15, quick return mirror 16, shutter 17, and film 18. The ring-shaped diaphragm 7 is provided with respect to the relay lenses 8 and 10 and the objective lens 12 at a position substantially conjugate with the pupil of the eye to be inspected.
【0012】リレーレンズ8とリング状絞り7との間に
は、合焦用の指標投影光学系19の一部を構成するハーフ
ミラー20が設けられている。指標投影光学系19は光源2
1、指標板22、スプリットプリズム23、24を備えてい
る。光源21にはここではハロゲンランプが用いられてい
る。また、スプリットプリズム23、24は指標板22と一体
である。Between the relay lens 8 and the ring-shaped diaphragm 7, there is provided a half mirror 20 which constitutes a part of the index projection optical system 19 for focusing. The index projection optical system 19 is the light source 2
1, an index plate 22, split prisms 23, 24. A halogen lamp is used as the light source 21 here. The split prisms 23 and 24 are integrated with the index plate 22.
【0013】眼底カメラには、指標投影光学系19の光路
に挿入される遮光板26を有する遮光装置27が設けられて
いる。遮光装置27はロータリーソレノイド28を有し、2
9′はその回転軸である。この遮光装置27の作用につい
ては後述する。The fundus camera is provided with a light shielding device 27 having a light shielding plate 26 inserted into the optical path of the index projection optical system 19. The shading device 27 has a rotary solenoid 28,
9'is its axis of rotation. The operation of the light shielding device 27 will be described later.
【0014】コンデンサレンズ6とリング状絞り7との
間には、抽出光学系29の一部を構成する反射ミラー30が
設けられている。この反射ミラー30は観察用照明光束の
一部を抽出する。この反射ミラー30は眼底照明光束以外
の光束を抽出するために、リング状絞り7に極力接近さ
せて設けられている。その抽出光学系29はその反射ミラ
ー30により反射された光束を集光する集光レンズ31を有
し、その光束は受光素子32に集束される。Between the condenser lens 6 and the ring diaphragm 7, there is provided a reflection mirror 30 which constitutes a part of the extraction optical system 29. The reflection mirror 30 extracts a part of the illumination light flux for observation. The reflection mirror 30 is provided as close as possible to the ring-shaped diaphragm 7 in order to extract light beams other than the fundus illumination light beam. The extraction optical system 29 has a condenser lens 31 for condensing the light flux reflected by the reflection mirror 30, and the light flux is focused on a light receiving element 32.
【0015】撮影光学系2の途中には、孔空きミラー13
と合焦レンズ14との間にハーフミラー33が設けられてい
る。このハーフミラー33はアライメント指標投影光学系
34の一部を構成しており、35はその光源である。この光
源には例えばLEDが用いられている。In the middle of the photographing optical system 2, a perforated mirror 13
A half mirror 33 is provided between the focusing lens 14 and the focusing lens 14. This half mirror 33 is an alignment index projection optical system.
It forms part of 34, and 35 is its light source. An LED, for example, is used for this light source.
【0016】クイックリターンミラー16は接眼光学系36
の一部を構成しており、観察時に撮影光学系2の光路に
挿入されており、撮影時は撮影光学系2の光路から退避
されている。接眼光学系36は反射鏡37、接眼レンズ38を
有する。結像レンズ15とクイックリターンミラー16との
間には被検眼11の眼底39からの反射光束の一部を抽出す
る反射光束抽出光学部材としての可動ミラー40が設けら
れている。抽出光学部材40は抽出光学部材41の一部を構
成しており、抽出光学部材41は集光レンズ42と受光素子
43とを有し、受光素子43には抽出光学部材41により抽出
された眼底撮影部位からの反射光束が集束される。The quick return mirror 16 is an eyepiece optical system 36.
Is inserted in the optical path of the photographing optical system 2 during observation, and is retracted from the optical path of the photographing optical system 2 during photographing. The eyepiece optical system 36 has a reflecting mirror 37 and an eyepiece lens 38. A movable mirror 40 is provided between the imaging lens 15 and the quick return mirror 16 as a reflected light beam extraction optical member for extracting a part of the reflected light beam from the fundus 39 of the eye 11 to be inspected. The extraction optical member 40 constitutes a part of the extraction optical member 41, and the extraction optical member 41 includes the condenser lens 42 and the light receiving element.
43, the reflected light flux from the fundus imaging region extracted by the extraction optical member 41 is focused on the light receiving element 43.
【0017】撮影に際しては、アライメント指標がハー
フミラー33により反射されて、孔空きミラー13の孔部13
aを通って被検眼11に投影され、被検者はアライメント
指標により、被検眼に対するアライメント合わせを行な
う。At the time of photographing, the alignment index is reflected by the half mirror 33, and the hole portion 13 of the perforated mirror 13 is taken.
The image is projected through the eye a onto the eye 11 to be examined, and the subject aligns the eye 11 with the alignment index.
【0018】観察用の照明光束はコンデンサレンズ4に
より一旦撮影光源5の位置に集束されて再び拡散され、
コンデンサレンズ6により集光されて、リング状絞り7
に導かれる。リング状絞り7に導かれた観察用の照明光
束は、その一部が反射ミラー30により反射されて集光レ
ンズ31に導かれ、受光素子32に集束される。受光素子32
に導かれた観察用照明光束は基準光量として用いられ、
受光素子32はその基準光量に対応する光電信号を反射率
演算回路44に向かって出力する。The illumination luminous flux for observation is once focused on the position of the photographing light source 5 by the condenser lens 4 and diffused again,
The light is condensed by the condenser lens 6, and the ring-shaped diaphragm 7
Be led to. A part of the illumination light flux for observation guided to the ring-shaped diaphragm 7 is reflected by the reflection mirror 30, guided to the condenser lens 31, and focused on the light receiving element 32. Light receiving element 32
The illumination light flux for observation guided to is used as a reference light amount,
The light receiving element 32 outputs a photoelectric signal corresponding to the reference light amount to the reflectance calculation circuit 44.
【0019】リング状絞り7を通過した観察用の照明光
束は輪帯光束となり、リレーレンズ8、反射鏡9、リレ
ーレンズ10、孔空きミラー13、対物レンズ12を介して被
検眼11の眼底39を照明する。観察用の照明光束は眼底39
により反射され、その反射光束は対物レンズ12、孔空き
ミラー13の孔部13a、合焦レンズ14、結像レンズ15を介
してクイックリターンミラー16に導かれ、このクイック
リターンミラー16により反射されて反射ミラー37、接眼
レンズ38を経由して検者の眼に導かれる。The illumination light flux for observation that has passed through the ring-shaped diaphragm 7 becomes an annular light flux, and passes through the relay lens 8, the reflecting mirror 9, the relay lens 10, the perforated mirror 13, and the objective lens 12 to the fundus 39 of the eye 11 to be inspected. Illuminate. The illumination light flux for observation is the fundus 39
The reflected light beam is guided to the quick return mirror 16 through the objective lens 12, the hole portion 13a of the perforated mirror 13, the focusing lens 14, and the imaging lens 15, and is reflected by the quick return mirror 16. It is guided to the examiner's eye via the reflection mirror 37 and the eyepiece lens 38.
【0020】合焦用の指標投影光学系19の一対の指標
は、ハーフミラー20により反射され、リレーレンズ8、
反射ミラー9、リレーレンズ10、孔空きミラー13、対物
レンズ12を経由して被検眼11の眼底39に投影され、その
反射光束は同様にして接眼光学系36に導かれる。眼底39
の像がぼけて見えるときには、一対の指標が分離して視
認され、眼底39の像が鮮明に結像して見えるときには一
対の指標が合致して視認される。指標板22と合焦レンズ
14とは可動可能とされ、指標板22をその合焦用の指標投
影光学系19の光路に沿って可動させると、その可動に伴
って合焦レンズ14が撮影光学系2の光軸に沿って可動さ
れ、これによって、眼底39のピント合わせが行なわれ
る。The pair of indexes of the index projection optical system 19 for focusing are reflected by the half mirror 20, and the relay lens 8,
It is projected onto the fundus 39 of the eye 11 to be examined via the reflection mirror 9, the relay lens 10, the perforated mirror 13, and the objective lens 12, and the reflected light flux is similarly guided to the eyepiece optical system 36. Fundus 39
When the image of (1) appears to be blurred, the pair of indexes are visually recognized separately, and when the image of the fundus 39 is clearly imaged, the pair of indexes are visually recognized to match. Index plate 22 and focusing lens
When the index plate 22 is moved along the optical path of the index projection optical system 19 for focusing, the focusing lens 14 is moved along the optical axis of the photographing optical system 2 along with the movement. Then, the fundus 39 is focused.
【0021】撮影スイッチ45を図2(a)に示すように
時点t1で操作すると、ロータリーソレノイド28が同時
に時点t1で駆動されて、遮光板26がその指標投影光学
系19の光路に挿入され、ピント合わせ用の指標が図2
(d)で示すように時点t2から時点t3の間遮光され
る。また、略同時にアライメント指標投影光学系34の光
源35が消灯される。When the photographing switch 45 is operated at the time point t1 as shown in FIG. 2A, the rotary solenoid 28 is simultaneously driven at the time point t1 and the light shielding plate 26 is inserted into the optical path of the index projection optical system 19. The index for focusing is shown in Fig. 2.
As shown in (d), light is shielded from time t2 to time t3. Further, the light source 35 of the alignment index projection optical system 34 is turned off at substantially the same time.
【0022】次に、駆動手段46が駆動されて図2(b)
で示すように時点t4において抽出光学部材40が撮影光
学系2の光路に挿入されて、眼底39において反射された
反射光束の一部が受光素子43に導かれ、受光素子43はそ
の反射光量に対応する光電信号を反射率演算回路44に向
かって出力する。反射率演算回路44は図2(b)の時点
t4から時点t5までの間で駆動されて反射率を演算
し、その出力は発光量制御回路47に入力される。発光量
制御回路47は、ここでは、反射率情報に基づきコンデン
サに充電される充電電圧を変更する。Next, the driving means 46 is driven to drive FIG. 2 (b).
At time t4, the extraction optical member 40 is inserted into the optical path of the photographing optical system 2 as shown by, and a part of the reflected light flux reflected by the fundus 39 is guided to the light receiving element 43. The corresponding photoelectric signal is output to the reflectance calculation circuit 44. The reflectance calculation circuit 44 is driven from time t4 to time t5 in FIG. 2B to calculate the reflectance, and its output is input to the light emission amount control circuit 47. Here, the light emission amount control circuit 47 changes the charging voltage with which the capacitor is charged based on the reflectance information.
【0023】一方、 シャッター17は反射率演算後図2
(c)で示すように時点t6で駆動され、一定時間経過
すると図2(e)で示すように時点t7においてシンク
ロ接点信号が発光量制御回路2に入力され、撮影光源5
は図2(f)で示すように閃光を発する。その撮影光源
5は反射率情報に基づく発光強度(ピーク)で発光す
る。この発光強度の変更により全発光量が反射率に応じ
て変更される。なお、可動ミラー40は撮影直前の眼底撮
影部位の反射率を測定した後、時点t5において撮影光
学系2の光路から退避される。On the other hand, the shutter 17 is shown in FIG.
As shown in (c), it is driven at time t6, and after a certain time elapses, a sync contact signal is input to the light emission amount control circuit 2 at time t7 as shown in FIG.
Emits a flash as shown in FIG. The photographing light source 5 emits light with a light emission intensity (peak) based on the reflectance information. By changing the light emission intensity, the total light emission amount is changed according to the reflectance. The movable mirror 40 is retracted from the optical path of the photographing optical system 2 at time t5 after measuring the reflectance of the fundus photographing region immediately before photographing.
【0024】本実施例によれば、眼底撮影部位の反射率
の検出に先だって、アライメント指標投影光学系34の光
源35は消灯され、消灯速度の遅い光源21は反射率の演算
中に遮光されるので眼底撮影部位の反射率を正確に測定
できる。According to the present embodiment, the light source 35 of the alignment index projection optical system 34 is turned off and the light source 21 with a slow turn-off speed is shielded during the reflectance calculation prior to the detection of the reflectance of the fundus imaging region. Therefore, the reflectance of the fundus imaging part can be accurately measured.
【0025】以上実施例においては、遮光板26を回転さ
せて指標投影光学系19の光路に挿入させる構成とした
が、遮光板26を用いる代わりに指標投影光学系19の光路
の途中に液晶シャッター等のシャッター機構を設けても
よい。In the above embodiments, the light shield plate 26 is rotated and inserted into the optical path of the index projection optical system 19, but instead of using the light shield plate 26, a liquid crystal shutter is provided in the optical path of the index projection optical system 19. A shutter mechanism such as the above may be provided.
【0026】また、実施例では合焦用の指標投影光学系
19の指標を遮光するようにしたが、アライメント指標、
固視標も遮蔽するようにしてもよい。In the embodiment, the index projection optical system for focusing is also used.
I tried to shield 19 indexes from light, but alignment indexes,
The fixation target may also be shielded.
【0027】[0027]
【発明の効果】本発明に係わる請求項1に記載の眼科用
撮影装置は、以上説明したように眼底撮影部位の反射率
を求めて眼底撮影を行なうようにしたので、眼底からの
反射光量を積算して適正露光量を設定する従来のものに
較べて、より正確に適正露光量を設定できるという効果
を奏する。As described above, the ophthalmic photographing apparatus according to the first aspect of the present invention obtains the fundus photographing by obtaining the reflectance of the fundus photographing region. The present invention has an effect that the proper exposure amount can be set more accurately than the conventional one in which the proper exposure amount is integrated and set.
【0028】また、請求項3に記載の眼科撮影用装置に
よれば、眼底撮影部位の反射率を求めるに際し、眼底に
投影されるピント合わせ用の指標を遮蔽する構成とした
ので眼底撮影部位の反射率を正確に求めることができ
る。Further, according to the ophthalmic photographing apparatus of the third aspect, when the reflectance of the fundus photographing portion is obtained, the index for focusing focused on the fundus of the eye is shielded. The reflectance can be accurately obtained.
【図1】 本発明に係わる眼科用検査装置としての眼底
カメラの一実施例を示す光学図である。FIG. 1 is an optical diagram showing an embodiment of a fundus camera as an ophthalmic examination apparatus according to the present invention.
【図2】 本発明に係わる眼科用検査装置としての眼底
カメラの反射率測定から撮影光源までの過程を示すタイ
ミング図である。FIG. 2 is a timing chart showing a process from reflectance measurement to a photographing light source of a fundus camera as an ophthalmic examination apparatus according to the present invention.
1 照明光学系 2 撮影光学系 7 リング状絞り 11 被検眼 26 遮光板 29 抽出光学系 30 ミラー(照明光束抽出光学部材) 34 抽出光学系 40 可動ミラー(反射光束抽出光学部材) 44 反射率演算回路 1 Illumination optical system 2 Shooting optical system 7 Ring diaphragm 11 Eye to be examined 26 Light shield 29 Extraction optical system 30 Mirror (illumination light flux extraction optical member) 34 Extraction optical system 40 Movable mirror (optical component for extracting reflected light flux) 44 Reflectance calculation circuit
Claims (3)
の途中に観察用の照明光束の一部を抽出する照明光束抽
出光学部材が設けられ、撮影光学系に被検眼からの観察
用の照明光束の反射光束を抽出する反射光束抽出光学部
材が設けられ、前記照明光束抽出光学部材により抽出さ
れた観察用の照明光束の光量を基準として観察用の反射
光束の光量との比である反射率を演算により求める演算
手段を備え、撮影光源の発光量が演算手段により求めら
れた反射率により制御されることを特徴とする眼科用撮
影装置。1. An illumination light beam extracting optical member for extracting a part of an illumination light beam for observation is provided in the middle of an illumination optical system having a light source for illuminating an eye to be inspected, and an optical system for observation from an eye to be inspected is provided in a photographing optical system. A reflection light flux extraction optical member for extracting a reflection light flux of the illumination light flux is provided, and the reflection is a ratio of the light intensity of the observation illumination light flux extracted by the illumination light flux extraction optical member to the light intensity of the observation reflection light flux. An ophthalmic photographing apparatus comprising: a calculating unit for calculating a ratio, wherein the light emission amount of a photographing light source is controlled by the reflectance calculated by the calculating unit.
光学系に設けられて前記被検眼の瞳孔と光学的に略共役
なリング絞りと前記光源との間で前記被検眼の眼底を照
明する照明光束以外の光束を抽出することのできる箇所
に設けたことを特徴とする請求項1に記載の眼科用撮影
装置。2. The illumination light flux extracting optical member is provided in the illumination optical system and illuminates a fundus of the eye to be inspected between a light source and a ring diaphragm that is optically substantially conjugate with a pupil of the eye to be inspected. The ophthalmic photographing apparatus according to claim 1, wherein the ophthalmic photographing apparatus is provided at a location where a luminous flux other than the illumination luminous flux can be extracted.
投影する指標投影光学系が設けられ、少なくとも反射率
を検出している間前記指標投影光学系の指標を遮蔽する
遮光手段が設けられていることを特徴とする眼科用撮影
装置。3. An index projection optical system for projecting an index onto the eye to be inspected is provided in the middle of the illumination optical system, and a light shielding unit is provided for shielding the index of the index projection optical system at least while detecting the reflectance. An ophthalmic imaging device characterized by being provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03182394A JP3108135B2 (en) | 1991-07-23 | 1991-07-23 | Ophthalmic imaging equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03182394A JP3108135B2 (en) | 1991-07-23 | 1991-07-23 | Ophthalmic imaging equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0523305A true JPH0523305A (en) | 1993-02-02 |
JP3108135B2 JP3108135B2 (en) | 2000-11-13 |
Family
ID=16117553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP03182394A Expired - Fee Related JP3108135B2 (en) | 1991-07-23 | 1991-07-23 | Ophthalmic imaging equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3108135B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013048896A (en) * | 2011-07-29 | 2013-03-14 | Canon Inc | Ophthalmic apparatus |
-
1991
- 1991-07-23 JP JP03182394A patent/JP3108135B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013048896A (en) * | 2011-07-29 | 2013-03-14 | Canon Inc | Ophthalmic apparatus |
Also Published As
Publication number | Publication date |
---|---|
JP3108135B2 (en) | 2000-11-13 |
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