JPS6238134A - Ophthalmic apparatus - Google Patents
Ophthalmic apparatusInfo
- Publication number
- JPS6238134A JPS6238134A JP61174041A JP17404186A JPS6238134A JP S6238134 A JPS6238134 A JP S6238134A JP 61174041 A JP61174041 A JP 61174041A JP 17404186 A JP17404186 A JP 17404186A JP S6238134 A JPS6238134 A JP S6238134A
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- eye
- fundus
- examined
- fixation target
- 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
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- Eye Examination Apparatus (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は検眼鏡あるいは眼底カメラ等の眼科装置であっ
て、被検眼の視線を固定することが可能な眼科装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ophthalmological apparatus such as an ophthalmoscope or a fundus camera, which is capable of fixing the line of sight of an eye to be examined.
（従来の技術）
従来、眼科装置内部に被検眼の視線を固定するための固
視標を設けた眼底カメラが特開昭５１−５３７８８号公
報に知られる。(Prior Art) A fundus camera in which a fixation target for fixing the line of sight of an eye to be examined is provided inside an ophthalmological apparatus is known from Japanese Patent Laid-Open No. 51-53788.
なお、装置内部に設けられた斯かる固視標は、眼底観察
時に光路内に設けられ被検眼に呈示され眼底撮影時に光
路外へ変位させられる。Note that such a fixation target provided inside the apparatus is provided within the optical path during fundus observation, is presented to the eye to be examined, and is displaced out of the optical path during fundus imaging.
（発明が解決しようとする問題点）
眼科装置内部に設けられた従来の固視標は、被検眼が正
視眼であれは眼底に鮮明に投影されるが、被検眼が遠視
眼或いは近視眼という異常眼の場合には眼底に鮮明に投
影されないという問題点かあだ。又眼底カメラの場合従
来の固視標は眼底撮影時に光路外へ変位させなければな
らないという問題点があった。(Problems to be Solved by the Invention) Conventional fixation targets installed inside ophthalmological devices are clearly projected onto the fundus if the eye to be examined is emmetropic, but if the eye to be examined has an abnormality such as hyperopia or myopia. In the case of the eye, the problem is that it is not clearly projected onto the fundus. Further, in the case of a fundus camera, there is a problem in that the conventional fixation target must be moved out of the optical path when photographing the fundus.
更に、従来の固視標は、眼底観察時に被検眼に呈示され
るというものであり、アライメントのための前眼部観察
系を備えた眼科装置にあっては、前眼部観察時に被検眼
の視線が固定せず調整かしにくいという問題点かあった
。Furthermore, conventional fixation targets are presented to the examinee's eye during fundus observation, and in ophthalmological equipment equipped with an anterior segment observation system for alignment, the fixation target is presented to the subject's eye during observation of the anterior segment of the eye. There was a problem that the line of sight was not fixed and it was difficult to adjust.
本発明は斯かる従来例の欠点を解消した眼科装置を提供
することを目的とする。It is an object of the present invention to provide an ophthalmologic apparatus that eliminates the drawbacks of the prior art.
〔問題を解決するための手段］
斯かる問題点を解決するために被検眼に対向する対物光
学系を介して被検眼を不可視光で照明する照明光学系と
、前記対物光学系及びピント調整可能な第１の結像光学
系を介して被検眼眼底を観察する眼底観察光学系と、該
眼底観察光学系の光路から外れた光路にあって前記第１
の結像光学系と連動する第２の結像光学系及び前記対物
光学系を介して、被検眼眼底に固視標を投影する固視標
投影系を備える。[Means for solving the problem] In order to solve this problem, an illumination optical system that illuminates the eye to be examined with invisible light via an objective optical system facing the eye to be examined, and an optical system that can adjust the focus of the objective optical system and the eye to be examined are provided. a fundus observation optical system for observing the fundus of the subject's eye through a first imaging optical system;
A fixation target projection system is provided that projects a fixation target onto the fundus of the subject's eye via a second imaging optical system that works with the imaging optical system and the objective optical system.
更には該固視標投影系の光路中に設けられる光分割器と
、該光分割器を介して被検眼前眼部を観察する前眼部観
察光学系を備える。The apparatus further includes a light splitter provided in the optical path of the fixation target projection system, and an anterior segment observation optical system for observing the anterior segment of the subject's eye via the light splitter.
〔実施例］ 以下、第１図に本発明の実施例を示す。〔Example] An embodiment of the present invention is shown in FIG. 1 below.
図中、Ｅは所定の位置を占める被検眼、Ｅｆは眼底、Ｅ
ｃは角膜である。１は対物レンズ、２は結像レンズ、３
はフィルムで、対物レンズ１は眼底Ｅｆの像を結像し、
結像レンズ２は眼底の像をフィルム３上に形成する。４
は白熱光源、５は集光鏡、６はコンデンサーレンズ、７
は可視領域を遮断し赤光領域を透過する赤外フィルター
、８はストロボ管、９は第２コンデンサーレンズ、１゜
は光路屈折鏡、１１はリング状開口を具えるスリット板
であり、光源４およびストロボ管８を発した光束はスリ
ット板１１に収斂する。１２はリレーレンズ、１３は絞
り円孔を具える有孔鏡で、有孔鏡１３の鏡面はリレーレ
ンズ１２に関してスリット板１１と共役に配する。また
有孔鏡１３の鏡面は対物レンズ１に関して被検眼の前眼
部例えば虹彩と角膜の頂点の中間と共役に設定する。部
材１乃至１３は眼底照明系を構成する。１４は跳上げ鏡
で眼底観察時には光路中に斜設し、眼底撮影時には光路
外へ除去する。１５はフィールドレンズで、結像レンズ
２の像面に設ける。１６は光路屈折鏡、１７は撮影レン
ズである。１８は撮影管で、赤外領域に感度を持つもの
を使用する。また撮像レンズ１７は、結像レンズ２によ
る像を撮像管１８の受光面に再結像する。１９はモニタ
ー装置、２０はブラウン管である。モニター装置１９は
、撮像管１８により光電変換された信号を処理してブラ
ウン管用の画像信号に変換する回路を収納する。In the figure, E is the subject's eye occupying a predetermined position, Ef is the fundus, and E
c is the cornea. 1 is an objective lens, 2 is an imaging lens, 3
is a film, and the objective lens 1 forms an image of the fundus Ef,
An imaging lens 2 forms an image of the fundus on a film 3. 4
is an incandescent light source, 5 is a condenser mirror, 6 is a condenser lens, 7
8 is an infrared filter that blocks visible light and transmits red light, 8 is a strobe tube, 9 is a second condenser lens, 1° is an optical path refracting mirror, 11 is a slit plate with a ring-shaped aperture, and light source 4 The light beam emitted from the strobe tube 8 is converged on the slit plate 11. 12 is a relay lens; 13 is a perforated mirror having a circular diaphragm hole; the mirror surface of the perforated mirror 13 is arranged to be conjugate with the slit plate 11 with respect to the relay lens 12; Further, the mirror surface of the perforated mirror 13 is set to be conjugate with the anterior part of the eye to be examined, for example, between the iris and the vertex of the cornea, with respect to the objective lens 1. Members 1 to 13 constitute a fundus illumination system. Reference numeral 14 denotes a flip-up mirror which is installed obliquely in the optical path when observing the fundus, and is removed out of the optical path when photographing the fundus. A field lens 15 is provided on the image plane of the imaging lens 2. 16 is an optical path refracting mirror, and 17 is a photographing lens. Reference numeral 18 denotes a photographing tube, which is sensitive to the infrared region. Further, the imaging lens 17 re-images the image formed by the imaging lens 2 on the light receiving surface of the imaging tube 18 . 19 is a monitor device, and 20 is a cathode ray tube. The monitor device 19 houses a circuit that processes a signal photoelectrically converted by the image pickup tube 18 and converts it into an image signal for a cathode ray tube.
以上か被検眼眼底を観察系であるが以下、被検眼前眼部
の観察系を示す。The above is a system for observing the fundus of the eye to be examined, and below, a system for observing the anterior segment of the eye to be examined will be described.
ＩＶｌｄコ＊１１．＋）ルー出＋ｋＩ−だ＋＋ｌイノ）
ｉ！１Ｊｕｌｌ＋！ｍ＜１１７．！／”Ｚより小さい直
径の導光鏡で、撮影時には光路外へ除去する。３２は斜
設半透鏡、３３は撮像レンズ、３４は別の撮像管で、被
検眼前眼部の所定位置と撮像管３４の受光面は対物レン
ズ１と鏡３１および撮像レンズ３３に関して共役である
。３５はモニター装置、３６はブラウン管で、眼底の像
と前眼部の像が同時に観察できる様にモニター装置１９
と３５は隣接して配する。IVld *11. +) Lou out+kI-da++l Ino)
i! 1 Jull+! m<117. ! /" A light guiding mirror with a diameter smaller than Z, which is removed to the outside of the optical path when photographing. 32 is an oblique semi-transparent mirror, 33 is an imaging lens, and 34 is another imaging tube, which is used to locate and image the anterior segment of the subject's eye at a predetermined position. The light-receiving surface of the tube 34 is conjugate with respect to the objective lens 1, the mirror 31, and the imaging lens 33. 35 is a monitor device, 36 is a cathode ray tube, and a monitor device 19 is installed so that an image of the fundus and an image of the anterior segment of the eye can be observed simultaneously.
and 35 are placed adjacent to each other.
一方３７は収斂レンズ、３８は指標用の微弱光を発光し
て発光ダイオードで、いわゆる固視標としての機能を有
する。この発光タイオード３８は光軸に垂直な一平面内
を自在に移動し得る。また、この実施例では結像レンズ
２を移動して被検眼眼底のピント調整を行なうものとし
、収斂レンズ３７と結像レンズ２を連動させて、対物レ
ンズ１と結像レンズ２に関する眼底Ｅｆとフィルム面３
の関係が対物レンズ１と収斂レンズ３７に関する眼底Ｅ
ｆと発光ダイオード３８の関係に等しくなる様に維持す
る。すなわち発光ダイオード３８は１１巳底Ｅｆ）−肚
母位苦ν−あ不一従って 咀完カゾラのピントが眼底に
合っている時には、被検者は発光ダイオード３８を鮮明
に視認する。On the other hand, 37 is a converging lens, and 38 is a light emitting diode that emits weak light for an index, and has a function as a so-called fixation target. This light emitting diode 38 can freely move within a plane perpendicular to the optical axis. Further, in this embodiment, the focus of the fundus of the subject's eye is adjusted by moving the imaging lens 2, and the converging lens 37 and the imaging lens 2 are linked to adjust the fundus Ef with respect to the objective lens 1 and the imaging lens 2. Film side 3
The relationship between the fundus E with respect to the objective lens 1 and the convergent lens 37 is
The relationship between f and the light emitting diode 38 is maintained to be equal. In other words, the light emitting diode 38 is 11mm wide (Ef) - Abdominal position ν - Afuichi Therefore, when the mastication cazola is focused on the fundus of the eye, the subject clearly sees the light emitting diode 38.
以上の構成で、光源４を点灯すると、ブラウン管２０に
は眼底の像が映り、ブラウン管３６には前眼部の像か映
る。操作者は前眼部の像を観察して作動距離および被検
眼と対物レンズの粗い位置合わせを行なう。更に、眼底
像を観察してピント調整及びフレアが入らないように微
細な位置合わせを行なう。なお発光ダイオード３８を適
宜の位置に設定し、被検眼の視線を誘導して、撮影視野
を決めることかできる。そしてピント調整と位置合わせ
調整が良好であることを確肥してストロボ管を発光させ
ることにより撮影を行なう。With the above configuration, when the light source 4 is turned on, an image of the fundus of the eye is reflected on the cathode ray tube 20, and an image of the anterior segment of the eye is reflected on the cathode ray tube 36. The operator observes the image of the anterior segment of the eye and roughly aligns the working distance and the objective lens with the eye to be examined. Furthermore, the fundus image is observed to perform focus adjustment and fine positioning to prevent flare. Note that the photographing field of view can be determined by setting the light emitting diode 38 at an appropriate position and guiding the line of sight of the eye to be examined. Then, after confirming that the focus adjustment and positioning adjustment are good, a photograph is taken by lighting the strobe tube.
ここで導光鏡３１は眼底撮影時には光路外へ除去するが
、撮影前には光路内にあり前眼部観察時には発光ダイオ
ード３８を被検眼に視認させつつ前眼部観察かてきる。Here, the light guiding mirror 31 is removed out of the optical path when photographing the fundus, but it remains in the optical path before photographing, and when observing the anterior segment of the eye, the light emitting diode 38 is made visible to the eye to be examined while observing the anterior segment of the eye.
又導光鏡３１はその直径か′ｆ１７影光束径より小さい
ため眼底観察時に発光ダイオード３８を被検眼に視認さ
せつつも導光鏡３１の周辺部を通過する光束によって眼
底観察かてきる。In addition, since the diameter of the light guide mirror 31 is smaller than the diameter of the shadow light flux 'f17, the fundus can be observed by the light flux passing through the periphery of the light guide mirror 31 while the light emitting diode 38 is visible to the subject's eye during fundus observation.
なお検者は一１１シにモニタを観察しているため発光ダ
イオード３８は検者に視認されず被検者のみに視認され
る。なお、斜設半透鏡３２を介して検者に発光ダイオー
ド３８か視認されることもない。Note that since the examiner observes the monitor all the time, the light emitting diode 38 is not visible to the examiner but only to the subject. Note that the light emitting diode 38 is not visible to the examiner through the oblique semi-transparent mirror 32.
ところで如上の構成で、赤外フィルター７を取外して光
源４の光ユをこの光源からの光か被検眼の障孔を線動さ
せない程度に減光し、すなわち実質的に不可視光とし、
撮像管１８をイメーシインテンシ・ファイアとビジコン
を組合せた超高感度撮像管に替えても良い。By the way, in the above configuration, the infrared filter 7 is removed and the light from the light source 4 is attenuated to such an extent that the light from this light source does not linearly move the defect in the eye to be examined, that is, it becomes substantially invisible light.
The image pickup tube 18 may be replaced with an ultra-high sensitivity image pickup tube that combines an image intensity fire and a vidicon.
（効 果〕
以上、本発明によればピント調整系に連動する結像光学
系を介して固視標は被検眼視度に拘らず常に鮮明に視認
される。(Effects) As described above, according to the present invention, the fixation target is always clearly visible through the imaging optical system linked to the focus adjustment system, regardless of the diopter of the eye to be examined.
特に、被検眼は不可視光で照明されるため被検眼は暗い
背景の中で固視標を明瞭に視認でき、固視標の輝度も小
ざくて済む。In particular, since the eye to be examined is illuminated with invisible light, the eye to be examined can clearly see the fixation target in a dark background, and the brightness of the fixation target can also be low.
又、本発明によれは、照明光学系に兼用される対物光学
系に変化を与えないですみ、フレア除去の照明条件を確
保できる。又、固視標が眼底観察系の光路内にあると眼
底撮影時に光路外へ変位させる必要があるが、本発明に
よれば固視標を眼底撮影時に変位させなくても良い。Further, according to the present invention, there is no need to make any changes to the objective optical system that also serves as the illumination optical system, and the illumination conditions for eliminating flare can be ensured. Further, if the fixation target is within the optical path of the fundus observation system, it is necessary to move it out of the optical path when photographing the fundus, but according to the present invention, the fixation target does not need to be displaced when photographing the fundus.
更に本発明によれば被検眼前眼部の観察時に被検眼の視
線を固定して被検眼の位置合わせを容易にすることがで
きる。Further, according to the present invention, it is possible to fix the line of sight of the eye to be examined during observation of the anterior segment of the eye to be examined, thereby facilitating positioning of the eye to be examined.
又、前眼部観察時に視線を定める際、固視標は被検眼像
を観察している検者には視認されず、被検者にのみ視認
されるため固視標が検者の妨げになるということがない
。In addition, when determining the line of sight during anterior segment observation, the fixation target is not visible to the examiner who is observing the image of the subject's eye, but only to the subject, so the fixation target may interfere with the examiner. There is no such thing as becoming.
第１図は本発明の実施例を示す図。
図中、１は対物レンズ、２は結像レンズ、３はフィルム
、７は赤外フィルター、１８は撮像管、３１は導光鏡、
３４は撮像管、３７は収斂レンズ、３８は発光ダイオー
ドである。FIG. 1 is a diagram showing an embodiment of the present invention. In the figure, 1 is an objective lens, 2 is an imaging lens, 3 is a film, 7 is an infrared filter, 18 is an image pickup tube, 31 is a light guide mirror,
34 is an imaging tube, 37 is a converging lens, and 38 is a light emitting diode.
Claims (1)
視光で照明する照明光学系と、前記対物光学系及びピン
ト調整可能な第１の結像光学系を介して被検眼眼底を観
察する眼底観察光学系と、該眼底観察光学系の光路から
外れた光路にあって前記第１の結像光学系と連動する第
２の結像光学系及び前記対物光学系を介して、被検眼眼
底に固視標を投影する固視標投影系を有することを特徴
とする眼科装置。 ２、前記固視標は光軸に垂直に移動可能である特許請求
の範囲第１項記載の眼科装置。 ３、被検眼に対向する対物光学系を介して被検眼を不可
視光で照明する照明光学系と、前記対物光学系及びピン
ト調整可能な第１の結像光学系を介して被検眼眼底を観
察する眼底観察光学系と、該眼底観察光学系の光路から
外れた光路にあって前記第１の結像光学系と連動する第
２の結像光学系及び前記対物光学系を介して被検眼眼底
に固視標を投影する固視標投影系と、該固視標投影系の
光路中に設けられる光分割器と、該光分割器を介して被
検眼前眼部を観察する前眼部観察光学系を有することを
特徴とする眼科装置。[Scope of Claims] 1. An illumination optical system that illuminates the eye to be examined with invisible light through an objective optical system facing the eye to be examined, and a first imaging optical system whose focus is adjustable through the objective optical system and the eye to be examined. a fundus observation optical system for observing the fundus of the eye to be examined; a second imaging optical system that is located in an optical path separate from the optical path of the fundus observation optical system and that operates in conjunction with the first imaging optical system; and the objective optical system. An ophthalmological apparatus characterized by having a fixation target projection system that projects a fixation target onto the fundus of an eye to be examined through. 2. The ophthalmologic apparatus according to claim 1, wherein the fixation target is movable perpendicularly to the optical axis. 3. Observing the fundus of the subject's eye through an illumination optical system that illuminates the subject's eye with invisible light through an objective optical system facing the subject's eye, and the objective optical system and a first imaging optical system whose focus is adjustable. A fundus observation optical system for observing the fundus of the eye to be examined, a second imaging optical system that is located in an optical path separate from the optical path of the fundus observation optical system and interlocks with the first imaging optical system, and the objective optical system. a fixation target projection system for projecting a fixation target on a target; a light splitter provided in the optical path of the fixation target projection system; and an anterior segment observation system for observing the anterior segment of the subject's eye via the light splitter. An ophthalmological device characterized by having an optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61174041A JPS6238134A (en) | 1986-07-23 | 1986-07-23 | Ophthalmic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61174041A JPS6238134A (en) | 1986-07-23 | 1986-07-23 | Ophthalmic apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6238134A true JPS6238134A (en) | 1987-02-19 |
| JPS6254496B2 JPS6254496B2 (en) | 1987-11-16 |
Family
ID=15971588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61174041A Granted JPS6238134A (en) | 1986-07-23 | 1986-07-23 | Ophthalmic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6238134A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0263430A (en) * | 1988-08-30 | 1990-03-02 | Canon Inc | Variable magnification type no pupil dilating fundus camera |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS433920Y1 (en) * | 1965-05-12 | 1968-02-19 | ||
| US3925793A (en) * | 1973-03-31 | 1975-12-09 | Canon Kk | Eye fundus camera with focus setting device |
| JPS51330A (en) * | 1974-06-19 | 1976-01-06 | Canon Kk | |
| JPS51128523A (en) * | 1975-04-30 | 1976-11-09 | Canon Inc | An optical system for the retinal camera |
| JPS525520A (en) * | 1975-07-03 | 1977-01-17 | Nippon Kogaku Kk <Nikon> | Ophthalmo funduscopic camera |
-
1986
- 1986-07-23 JP JP61174041A patent/JPS6238134A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS433920Y1 (en) * | 1965-05-12 | 1968-02-19 | ||
| US3925793A (en) * | 1973-03-31 | 1975-12-09 | Canon Kk | Eye fundus camera with focus setting device |
| JPS51330A (en) * | 1974-06-19 | 1976-01-06 | Canon Kk | |
| JPS51128523A (en) * | 1975-04-30 | 1976-11-09 | Canon Inc | An optical system for the retinal camera |
| JPS525520A (en) * | 1975-07-03 | 1977-01-17 | Nippon Kogaku Kk <Nikon> | Ophthalmo funduscopic camera |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0263430A (en) * | 1988-08-30 | 1990-03-02 | Canon Inc | Variable magnification type no pupil dilating fundus camera |
| JPH0431692B2 (en) * | 1988-08-30 | 1992-05-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6254496B2 (en) | 1987-11-16 |
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