JPH02198536A - Ophthalmic apparatus - Google Patents
Ophthalmic apparatusInfo
- Publication number
- JPH02198536A JPH02198536A JP1018130A JP1813089A JPH02198536A JP H02198536 A JPH02198536 A JP H02198536A JP 1018130 A JP1018130 A JP 1018130A JP 1813089 A JP1813089 A JP 1813089A JP H02198536 A JPH02198536 A JP H02198536A
- Authority
- JP
- Japan
- Prior art keywords
- light
- illumination
- visible
- infrared
- light shielding
- 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
Links
- 238000005286 illumination Methods 0.000 claims abstract description 93
- 230000003287 optical effect Effects 0.000 claims abstract description 63
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、被検眼に対向される対物レンズの表面からの
有害反射光を除去するための有害反射光除去光学要素を
照明系の光路に備えた眼科装置の改良に関し、可視照明
光を被検眼に対向する対物レンズを介して被検眼に照射
し、この被、検眼の観察・撮影を行う可視照明撮影と、
赤外照明光を対物レンズを介して被検眼に照射し、この
被検眼の観察・撮影を行う赤外照明撮影゛とを行うのに
好適の眼科装置に関する。Detailed Description of the Invention (Industrial Application Field) The present invention provides a harmful reflected light removing optical element for removing harmful reflected light from the surface of an objective lens facing an eye to be examined, in an optical path of an illumination system. Visible illumination photography in which visible illumination light is irradiated onto the eye to be examined through an objective lens facing the eye to be examined, and the eye to be examined is observed and photographed;
The present invention relates to an ophthalmological apparatus suitable for performing infrared illumination photography in which an eye to be examined is irradiated with infrared illumination light through an objective lens to observe and photograph the eye to be examined.
（従来の技術）
従来から、可視照明光を被検眼に対向する対物レンズを
介してその被検眼に照射し、その被検眼の観察・撮影を
行う眼科装置、たとえば、眼底カメラが知られている。(Prior Art) Ophthalmological devices, such as fundus cameras, have been known in the past for observing and photographing the eye by irradiating visible illumination light onto the eye through an objective lens facing the eye. .
この種の眼底カメラでは、その対物レンズの表面からの
有害反射光を除去するための有害反射光除去光学要素が
照明系の光路に設けられており、その有害反射光除去光
学要素には可視用遮光部としての黒点が形成されている
。In this type of fundus camera, an optical element for removing harmful reflected light from the surface of the objective lens is installed in the optical path of the illumination system. A black dot is formed as a light shielding part.
（発明が解決しようとする課題）
ところで、従来から、眼底カーメラでは、一般白黒、一
般カラー撮影等の一般撮影と、可視蛍光撮影とが行われ
ているが、近時、いわゆる一般撮影、可視蛍光撮影に加
えて、赤外照明光を対物レンズを介して被検眼に照射し
、一般赤外撮影、赤外蛍光撮影を行うことができるよう
にした眼科装置としての眼底カメラが開発されつつある
。(Problems to be Solved by the Invention) Conventionally, general photography such as general black and white photography, general color photography, etc., and visible fluorescence photography have been performed with the fundus carmera, but recently, so-called general photography, visible fluorescence photography, etc. Fundus cameras are being developed as ophthalmic devices that can perform general infrared photography and infrared fluorescence photography by irradiating infrared illumination light onto a subject's eye through an objective lens in addition to photography.
この種の眼底カメラでは、赤外照明の際の対物レンズの
有害反射光の除去が問題となるが、有害反射光除去光学
要素に、可視・赤外の両方の光を遮光する１個の可視・
赤外用遮光部を設けて、赤外・可視照明の両方に基づく
有害反射光を除去するために、従来から可視用遮光部が
設けられていた照明系の光路のその箇所に、可視から赤
外に渡って全てを遮光する可視・赤外用遮光部を設ける
ことにすると、可視波長よりも赤外波長が長いので、照
明系光路中のレンズに関して可視波長と赤外波長との違
いに基づき結像位置が異なり、対物レンズの近傍におい
て形成される遮光像の領域が可視照明と赤外照明とで異
なることになり、この不具合を解消するために対物レン
ズの近傍において従来の可視照明の遮光像と同じ大きさ
の遮光像を赤外照明で確保しようとすると、その可視・
赤外用遮光部を大きく形成しなければならず、可視照明
による一般観察・撮影の際に眼底中心部に影を生じ、ひ
いては、得られる写真に影が生じることになり好ましく
ない。In this type of fundus camera, removing harmful reflected light from the objective lens during infrared illumination is a problem.・
In order to remove harmful reflected light based on both infrared and visible illumination by providing an infrared light shielding section, a visible to infrared If a visible/infrared light blocking section is provided to block all light over the entire range, since infrared wavelengths are longer than visible wavelengths, images will be formed based on the difference between visible and infrared wavelengths regarding the lens in the illumination system optical path. Due to the difference in position, the area of the shaded image formed near the objective lens is different between visible illumination and infrared illumination.To solve this problem, the area of the shaded image formed near the objective lens is If you try to secure a blackout image of the same size with infrared illumination, the visible and
The infrared light-shielding part must be formed large, which causes a shadow in the center of the fundus during general observation and photography using visible illumination, which is undesirable because it causes a shadow in the resulting photograph.
そこで、本発明は、赤外・可視照明のいずれであっても
、観察・撮影時の不具合を解消しつつ有害反射光を確実
に除去できる簡単な構成の眼科装置を提供することにあ
る。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ophthalmologic apparatus with a simple configuration that can reliably remove harmful reflected light while eliminating problems during observation and photography, regardless of whether the illumination is infrared or visible.
（課題を解決しようとする手段）
本発明は、上記の課題に鑑み為されたもので、その特徴
とするところは、対物レンズの表面反射に基づく有害反
射光を除去するために、照明系の光路中に、可視照明光
に基づく可視用遮光部と赤外照明光に基づく赤外用遮光
部とがそれぞれ形成された有害光除去光学要素を設けた
ところにある。(Means for Solving the Problems) The present invention has been made in view of the above-mentioned problems, and its feature is that the illumination system is designed to eliminate harmful reflected light based on surface reflection of the objective lens. In the optical path, there is provided a harmful light removing optical element in which a visible light shielding part based on visible illumination light and an infrared light shielding part based on infrared illumination light are respectively formed.
（作用）
本発明によれば、可視照明光が対物レンズを介して被検
眼に照明されたときには、可視用遮光部に基づく遮光像
が対物レンズの近傍に形成されて、その対物レンズの表
面からの有害反射光が除去される。(Function) According to the present invention, when visible illumination light is illuminated on the subject's eye through the objective lens, a light shielding image based on the visible light shielding part is formed near the objective lens, and a light shielding image is formed in the vicinity of the objective lens. harmful reflected light is removed.
また、赤外照明光が対物レンズを介して被検眼に照明さ
れたときには赤外用遮光部に基づく遮光像が対物レンズ
の近傍に形成されて、その対物レンズの表面からの有害
反射光が除去される。Furthermore, when the infrared illumination light is illuminated on the subject's eye through the objective lens, a light shielding image based on the infrared light shielding part is formed near the objective lens, and harmful reflected light from the surface of the objective lens is removed. Ru.
（実施例）
以下に、本発明に係わる眼科装置を眼底カメラに適用し
た実施例について説明する。(Example) An example in which the ophthalmologic apparatus according to the present invention is applied to a fundus camera will be described below.
第１図、第２図は本発明に係わる眼底カメラの第１実施
例に用いる図であって、その第１図において、１は被検
眼、２は照明系、３は観察・撮影系、４は観察系である
。照明系２は観察用照明系５と撮影用照明系６とを有す
る。観察用照明系５は観察用照明光源７と集光レンズ８
とから大略構成され、撮影用照明系６は撮影用照明光源
９と集光レンズ１０とから大略構成され、観察用照明系
５と撮影用照明系６とはハーフミラ−１１を境に４５゜
対称位置に設けられている。なお、撮影用照明光＠９に
はキセノンランプなどを用いる。この撮影用照明光源９
と観察用照明光源７とは、ここでは、可視光から赤外光
に渡っての波長域を有する光を発生するものとする。1 and 2 are diagrams used in a first embodiment of the fundus camera according to the present invention. In FIG. 1, 1 is the eye to be examined, 2 is the illumination system, 3 is the observation/imaging system, and 4 is an observation system. The illumination system 2 includes an observation illumination system 5 and a photography illumination system 6. The observation illumination system 5 includes an observation illumination light source 7 and a condenser lens 8.
The photographic illumination system 6 is approximately composed of a photographic illumination light source 9 and a condenser lens 10, and the observation illumination system 5 and photographic illumination system 6 are 45° symmetrical with respect to a half mirror 11. located at the location. Note that a xenon lamp or the like is used as the illumination light for photographing @9. This lighting light source for photography 9
Here, the observation illumination light source 7 is assumed to generate light having a wavelength range from visible light to infrared light.
照明系２の光路途中には、赤外照明のときにはその光路
に挿入されかつ可視照明のときにはその光路から退避さ
れる可視カットフィルター１２′、挿脱自在なエキサイ
タ−フィルター１２、リングスリット１３、リレーレン
ズ１４、反射鏡１５、有害反射光除去光学要素１６、リ
レーレンズ１７、穴空き反射ミラー１８が設けられ、観
察・撮影系３は対物レンズ１９、絞り部材加、挿脱自在
なバリアフィルター２１、リレーレンズ２２、はね上げ
ミラーｎ、フィルム２４から構成され、観察系４はフィ
ールドレンズ部、反射＃１２６、接眼レンズ２７から概
略構成されている。In the middle of the optical path of the illumination system 2, there is a visible cut filter 12' that is inserted into the optical path during infrared illumination and withdrawn from the optical path during visible illumination, a removable exciter filter 12, a ring slit 13, and a relay. A lens 14, a reflecting mirror 15, a harmful reflected light removal optical element 16, a relay lens 17, and a holed reflecting mirror 18 are provided, and the observation/photographing system 3 includes an objective lens 19, an aperture member, a barrier filter 21 that can be freely inserted and removed, It is composed of a relay lens 22, a flip-up mirror n, and a film 24, and the observation system 4 is roughly composed of a field lens section, a reflection #126, and an eyepiece lens 27.
エキサイタ−フィルター１２とバリアフィルター２１と
は可視照明・赤外照明により一般撮影を行うときには、
照明系２及び観察・撮影系３の光路から退避される。ま
た、蛍光剤を被検者に静注（静脈注射）して、可視照明
により蛍光眼底撮影を行うときには、蛍光剤を励起させ
るための励起波長の光を透過させるため、エキサイタ−
フィルター１２が照明系２の光路に進入されると共に、
バリアフィルター２１が蛍光剤の蛍光波長の光のみを透
過させるため観察・撮影系３の光路に進入される。The exciter filter 12 and barrier filter 21 are used when performing general photography using visible illumination or infrared illumination.
It is evacuated from the optical path of the illumination system 2 and observation/photography system 3. In addition, when a fluorescent agent is intravenously injected into a subject and fluorescence fundus photography is performed using visible illumination, the exciter is used to transmit light at the excitation wavelength to excite the fluorescent agent.
As the filter 12 enters the optical path of the illumination system 2,
The barrier filter 21 enters the optical path of the observation/photographing system 3 in order to transmit only the light having the fluorescence wavelength of the fluorescent agent.
なお、赤外照明により赤外蛍光撮影の時は赤外照明用の
エキサイタ−フィルター１２、バリアフィルター２１が
各光路に進入される。Note that when infrared fluorescence photography is performed using infrared illumination, an exciter filter 12 and a barrier filter 21 for infrared illumination are inserted into each optical path.
観察光源７を点灯すると、観察用の照明光が集光レンズ
８により集光されてハーフミラ−１１に導かれ、そのハ
ーフミラ−１１により反射されて、エキサイタ−フィル
ター１２の方向に導かれる。一般撮影のときには、この
エキサイタ−フィルター１２は照明系２の光路から退避
しているので、観察用照明光はそのままリングスリット
１３に向かって進行し、赤外照明撮影の時にはエキサイ
タ−フィルター１２を介してリングスリット１３に導か
れる。観察用照明光は、そのリングスリット１３により
リング状照明光となる。このリング状照明光は、反射鏡
１５によって有害反射光除去光学要素１６に向けて反射
される。When the observation light source 7 is turned on, illumination light for observation is condensed by a condensing lens 8 and guided to a half mirror 11, reflected by the half mirror 11, and guided in the direction of an exciter filter 12. During general photography, this exciter filter 12 is withdrawn from the optical path of the illumination system 2, so the observation illumination light proceeds directly toward the ring slit 13, and during infrared photography, it passes through the exciter filter 12. and guided to the ring slit 13. The observation illumination light becomes ring-shaped illumination light due to the ring slit 13 . This ring-shaped illumination light is reflected by a reflecting mirror 15 toward an optical element 16 for removing harmful reflected light.
有害反射光除去光学要素１６は、ここでは、ガラス板か
ら形成され、そのガラス板の一面側１６ａにはその中央
に第２図に示すように可視用遮光部２８が形成されてい
る。その有害反射光除去光学要素１６の他面側１６ｂに
は赤外用遮光部２９が形成されている。この赤外用遮光
部２９は可視照明光を透過可能とされている。この有害
反射光除去光学要素１６はリレーレンズ１７に関して対
物レンズ１９と略光学的に共役な位置に設けられ、リン
グ状照明光はその有害反射光除去光学要素１６を透過し
、リレーレンズ１７、穴空き反射ミラー１８を介して対
物レンズ１９に導かれ、眼底３０を照明する。と同時に
、可視照明のときには、可視用遮光部２８によって、対
物レンズ１９の近傍に遮光像３１が形成され、赤外照明
のときには赤外用遮光部２９によって対物レンズ１９の
近傍に遮光像３１が形成され、可視照明・赤外照明の際
にその対物レンズ１９の表面において反射された有害反
射光の発生を防ぐ。The optical element 16 for removing harmful reflected light is here formed from a glass plate, and a visible light shielding part 28 is formed at the center of one side 16a of the glass plate, as shown in FIG. An infrared light shielding section 29 is formed on the other side 16b of the harmful reflected light removing optical element 16. This infrared light blocking section 29 is capable of transmitting visible illumination light. This harmful reflected light removing optical element 16 is provided at a position that is substantially optically conjugate with the objective lens 19 with respect to the relay lens 17, and the ring-shaped illumination light is transmitted through the harmful reflected light removing optical element 16, and the relay lens 17 and the hole The light is guided to the objective lens 19 via the empty reflecting mirror 18, and illuminates the fundus 30. At the same time, during visible illumination, a light shielding image 31 is formed near the objective lens 19 by the visible light shielding section 28, and during infrared illumination, a light shielding image 31 is formed near the objective lens 19 by the infrared light shielding section 29. This prevents the generation of harmful reflected light reflected on the surface of the objective lens 19 during visible illumination or infrared illumination.
眼底３０からの反射光は、対物レンズ１９を介して穴空
きミラー１８に導かれ、その穴部ｎ１ 絞り部材２０
の開口３３を通ってバリアフィルター２１の方向に導か
れる。一般撮影の時には、バリアフィルター２１は撮影
系３の光路から退避しているので、反射光はそのままリ
レーレンズ２２に導かれ、そのリレーレンズ２２を通過
した後、はね上げミラー２３により反射されて、フィー
ルドレンズ２５に導かれ、反射鏡２６により反射されて
、接眼レンズ２７に導かれる。検者は可視照明による一
般撮影の時にはこの接眼レンズ２７を覗くことにより眼
底３０を観察することができる。The reflected light from the fundus 30 is guided to the perforated mirror 18 via the objective lens 19, and the aperture member 20
is guided toward the barrier filter 21 through the opening 33 of the filter. During general photography, the barrier filter 21 is retracted from the optical path of the photography system 3, so the reflected light is directly guided to the relay lens 22, passes through the relay lens 22, and is reflected by the flip-up mirror 23 to form a field. The light is guided to a lens 25, reflected by a reflecting mirror 26, and guided to an eyepiece 27. During general photography using visible illumination, the examiner can observe the fundus 30 by looking through the eyepiece 27.
撮影時には、撮影用光源９が閃光されて照明系２を通っ
て被検眼１が照明されると共に、はね上げミラー２３が
はね上げられ、眼底３０からの反射光が対物レンズ１９
、穴空きミラー１８の穴部３２、絞り部材２０、バリア
フィルター２１、リレーレンズ２２を介してフィルム２
４に導かれ、眼底像がフィルム２４に結像される。When photographing, the photographing light source 9 is flashed to illuminate the eye 1 through the illumination system 2, and the flip-up mirror 23 is flipped up, and the reflected light from the fundus 30 is reflected by the objective lens 19.
, the film 2 through the hole 32 of the perforated mirror 18, the aperture member 20, the barrier filter 21, and the relay lens 22.
4, and a fundus image is formed on a film 24.
可視蛍光撮影のときには、照明系２の光路には従来と同
様の特性を有するエキサイタ−フィルター１２が進入さ
れ、撮影系３の光路にはバリアフィルター２１が進入さ
れるので、従来の可視蛍光撮影が行われ、赤外蛍光撮影
の時には、赤外蛍光撮影用のエキサイタ−フィルター１
２、バリアフィルター２１が照明系２、観察・撮影系３
の各光路に進入されるので、赤外蛍光撮影が行われる。When performing visible fluorescence photography, an exciter filter 12 having the same characteristics as the conventional one is inserted into the optical path of the illumination system 2, and a barrier filter 21 is introduced into the optical path of the imaging system 3, so that conventional visible fluorescence photography is not possible. When performing infrared fluorescence photography, an exciter filter 1 for infrared fluorescence photography is used.
2. Barrier filter 21 serves as illumination system 2 and observation/photography system 3.
Infrared fluorescence photography is performed.
なお、赤外蛍光撮影用のエキサイタ−フィルター１２は
波長７６０ｎｍの赤外光を透過させる機能を有し、赤外
蛍光撮影用のバリアフィルター２１は波長７６０ｎｍの
赤外光によって励起された波長８６０ｎｍの赤外光を透
過させる機能を有する。The exciter filter 12 for infrared fluorescence photography has a function of transmitting infrared light with a wavelength of 760 nm, and the barrier filter 21 for infrared fluorescence photography has the function of transmitting infrared light with a wavelength of 760 nm. It has the function of transmitting infrared light.
なお、可視撮影と赤外撮影とで、フィルム面上での結像
位置が異なり、フィルム面上でのピントがずれるのを防
止するため、この実施例では、バリアフィルター２１と
リレーレンズ２２との間に、光路長を補正するための光
路長補正光学部材２２−が設けられ、この光路長補正光
学部材２２′は可視撮影の時、観察・撮影系３の光路に
挿入され、赤外撮影の時、側ト撮影系３の光路から退避
される。Note that the image formation position on the film surface differs between visible photography and infrared photography, and in order to prevent the focus from shifting on the film plane, in this embodiment, the barrier filter 21 and the relay lens 22 are An optical path length correction optical member 22- for correcting the optical path length is provided between them, and this optical path length correction optical member 22' is inserted into the optical path of the observation/photography system 3 during visible photography, and is inserted into the optical path of the observation/photography system 3 during infrared photography. At this time, the side camera is evacuated from the optical path of the photographing system 3.
第３図、第４図は本発明に係わる眼科装置の第２実施例
を示す図であって、第３図に示すように有害反射光除去
光学要素１６の一面側１６ｂに同心円上に紫外線用遮光
部あ、可視用遮光部あ、赤外用遮光部３６をそれぞれ形
成すると共に、有害反射光除去光学要素１６を照明系２
の光路の延びる方向に往復動させて、対物レンズ１９の
近傍に遮光像３１を形成することとしたものである。紫
外線照明の際にも、赤外照明のときと同様に結像位置が
長波長の側に延びるので、適正位置に遮光像３１が形成
されるように有害反射光除去光学要素１８を往復動させ
る。3 and 4 are diagrams showing a second embodiment of the ophthalmological apparatus according to the present invention. As shown in FIG. In addition to forming a light shielding part A, a visible light shielding part A, and an infrared light shielding part 36, the optical element 16 for removing harmful reflected light is connected to the illumination system 2.
A light-shielding image 31 is formed near the objective lens 19 by reciprocating in the direction in which the optical path extends. In the case of ultraviolet illumination, the image formation position extends to the longer wavelength side as in the case of infrared illumination, so the harmful reflected light removing optical element 18 is reciprocated so that the light-shielding image 31 is formed at an appropriate position. .
第５図はその第２実施例に示す有害反射光除去光学要素
１６の変形例を示す図であって、紫外線用遮光部詞、可
視用遮先部あ、赤外用遮光部３６を中心０の回りに設け
、照明系２の照明光の波長に対応して、各遮光部あ、話
、３６を照明系２の光路に進入するように有害反射光除
去光学要素１６を中心０の回りに回転させる構成とした
ものである。FIG. 5 is a diagram showing a modified example of the optical element 16 for removing harmful reflected light shown in the second embodiment, in which the ultraviolet light shielding part, the visible light shielding part 36, and the infrared light shielding part 36 are located at the center 0. The optical element 16 for removing harmful reflected light is rotated around the center 0 so that each light shielding part 36 enters the optical path of the illumination system 2 in accordance with the wavelength of the illumination light of the illumination system 2. The configuration is such that the
第６図は本発明に係わる有害反射除去光学要素１６の変
形例を示すもので、有害反射除去光学要素１６としての
遮光部材を照明系２の光路の光軸方向に前後動させる構
成としたものである。なお、有害反射除去光学要１１６
を照明系２の光路、の光軸方向に前後動させる構成とす
る代わりに、ブレーンパラレルを有害反射除去光学要素
１６と反射鏡１５との間に進入可能に設け、赤外照明と
可視照明とに応じてその光路に進入・退避する構成とす
れば、遮光部材を前後動させなくとも遮光像３１の位置
を変更することができる。FIG. 6 shows a modification of the harmful reflection removing optical element 16 according to the present invention, in which the light shielding member as the harmful reflection removing optical element 16 is moved back and forth in the optical axis direction of the optical path of the illumination system 2. It is. In addition, harmful reflection removal optics 116
Instead of moving back and forth in the optical axis direction of the optical path of the illumination system 2, a brane parallel is provided so as to be able to enter between the harmful reflection removing optical element 16 and the reflecting mirror 15, and the infrared illumination and visible illumination are If the structure is such that the light enters or retreats from the optical path depending on the direction, the position of the light-shielding image 31 can be changed without moving the light-shielding member back and forth.
（発明の効果）
本発明に係わる眼科装置は、以上説明したように構成し
たので、可視照明、赤外照明に対応させて、対物レンズ
の表面反射に基づく有害光除去を簡単な構成で図ること
ができるという効果を奏する。(Effects of the Invention) Since the ophthalmological apparatus according to the present invention is configured as described above, it is possible to remove harmful light based on surface reflection of the objective lens with a simple configuration that corresponds to visible illumination and infrared illumination. It has the effect of being able to.
第１図は本発明に係わる眼科装置の第１実施例を示す光
学図、
第２図はその第１図に示す有害反射光除去光学要素の平
面図、
第３図本発明に係わる眼科装置の第２実施例を示す図、
第４図はその第３図に示す有害反射光除去光学要素の平
面図、
第５図は第４図に示す有害反射光除去光学要素の変形例
を示す図、
第６図は第４図に示す有害反射鏡除去光学要素の更に他
の変形例を示す図、
である。
１・・・被検眼、 ２・・・照明系３・・・
撮影系、 ４・・・観察系７・・・観察用光
源、 ９・・・撮影用光源１６・・・有害反射光
除去光学要素
１９・・・対物レンズ、 ２８・・・可視用遮光
部２９・・・赤外用遮光部FIG. 1 is an optical diagram showing a first embodiment of the ophthalmological apparatus according to the present invention, FIG. 2 is a plan view of the optical element for removing harmful reflected light shown in FIG. 4 is a plan view of the harmful reflected light removing optical element shown in FIG. 3; FIG. 5 is a diagram showing a modification of the harmful reflected light removing optical element shown in FIG. 4; FIG. 6 is a diagram showing still another modification of the harmful reflection mirror removing optical element shown in FIG. 4. 1... Eye to be examined, 2... Illumination system 3...
Imaging system, 4... Observation system 7... Observation light source, 9... Imaging light source 16... Harmful reflected light removal optical element 19... Objective lens, 28... Visible light shielding section 29 ...Infrared light shielding part
Claims (3)
レンズを介して前記被検眼に照射し、該被検眼の観察・
撮影を行う可視照明撮影と、前記照明系からの赤外照明
光を前記対物レンズを介して前記被検眼に照射し、該被
検眼の観察・撮影を行う赤外照明撮影とを行うことので
きる眼科装置であって、 前記対物レンズの表面反射による有害反射光を除去する
ために、前記照明系の光路中に、前記可視照明光に基づ
く可視用遮光部と前記赤外照明光に基づく赤外用遮光部
とがそれぞれ形成された有害光除去光学要素を設けたこ
とを特徴とする眼科装置。(1) Visible illumination light from the illumination system is irradiated onto the eye to be examined through an objective lens facing the eye to be examined, and the eye to be examined is observed.
Visible illumination photography in which an image is taken, and infrared illumination photography in which infrared illumination light from the illumination system is irradiated onto the eye to be examined through the objective lens to observe and photograph the eye to be examined. In the ophthalmological apparatus, in order to remove harmful reflected light due to surface reflection of the objective lens, a visible light shielding section based on the visible illumination light and an infrared light shielding section based on the infrared illumination light are provided in the optical path of the illumination system. 1. An ophthalmological apparatus comprising harmful light removing optical elements each having a light shielding part and a light shielding part formed therein.
の一面側であってその中央に形成され、前記赤外用遮光
部は前記有害反射光除去光学要素の他面側に形成され、
かつ、前記可視光が透過可能であることを特徴とする請
求項１に記載の眼科装置。(2) the visible light shielding section is formed on one side of the harmful reflected light removing optical element at the center thereof, and the infrared light blocking section is formed on the other side of the harmful reflected light removing optical element;
The ophthalmologic apparatus according to claim 1, wherein the visible light is permeable.
には可視用遮光部が前記照明系の光路に進入され、赤外
照明のときには前記赤外用遮光部が前記照明系の光路に
進入されるように駆動されることを特徴とする請求項１
に記載の眼科装置。(3) In the optical element for removing harmful reflected light, the visible light shielding section enters the optical path of the illumination system during visible illumination, and the infrared light shielding section enters the optical path of the illumination system during infrared illumination. Claim 1 characterized in that it is driven as follows.
The ophthalmological device described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1018130A JPH02198536A (en) | 1989-01-27 | 1989-01-27 | Ophthalmic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1018130A JPH02198536A (en) | 1989-01-27 | 1989-01-27 | Ophthalmic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02198536A true JPH02198536A (en) | 1990-08-07 |
Family
ID=11963027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1018130A Pending JPH02198536A (en) | 1989-01-27 | 1989-01-27 | Ophthalmic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02198536A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005270641A (en) * | 2004-02-27 | 2005-10-06 | Nidek Co Ltd | Fundus camera |
| JP2010119591A (en) * | 2008-11-19 | 2010-06-03 | Canon Inc | Ophthalmologic apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711632A (en) * | 1980-06-26 | 1982-01-21 | Olympus Optical Co | Illumination optical system of eye bottom camera |
| JPS5886138A (en) * | 1981-11-18 | 1983-05-23 | オリンパス光学工業株式会社 | Eye bottom camera |
| JPS6068826A (en) * | 1984-07-16 | 1985-04-19 | キヤノン株式会社 | Eyeground camera |
| JPS62179431A (en) * | 1986-02-01 | 1987-08-06 | キヤノン株式会社 | Eyeground camera |
-
1989
- 1989-01-27 JP JP1018130A patent/JPH02198536A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5711632A (en) * | 1980-06-26 | 1982-01-21 | Olympus Optical Co | Illumination optical system of eye bottom camera |
| JPS5886138A (en) * | 1981-11-18 | 1983-05-23 | オリンパス光学工業株式会社 | Eye bottom camera |
| JPS6068826A (en) * | 1984-07-16 | 1985-04-19 | キヤノン株式会社 | Eyeground camera |
| JPS62179431A (en) * | 1986-02-01 | 1987-08-06 | キヤノン株式会社 | Eyeground camera |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005270641A (en) * | 2004-02-27 | 2005-10-06 | Nidek Co Ltd | Fundus camera |
| JP4649229B2 (en) * | 2004-02-27 | 2011-03-09 | 株式会社ニデック | Fundus camera |
| JP2010119591A (en) * | 2008-11-19 | 2010-06-03 | Canon Inc | Ophthalmologic apparatus |
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