JPH07171103A - Ophthalmologic instrument - Google Patents
Ophthalmologic instrumentInfo
- Publication number
- JPH07171103A JPH07171103A JP5319628A JP31962893A JPH07171103A JP H07171103 A JPH07171103 A JP H07171103A JP 5319628 A JP5319628 A JP 5319628A JP 31962893 A JP31962893 A JP 31962893A JP H07171103 A JPH07171103 A JP H07171103A
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- alignment
- eye
- detection
- half mirror
- 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、アライメント光投影光
学系により被検眼の角膜に導かれてこの角膜で反射され
たアライメント反射光を受光して角膜と装置本体とのア
ライメント状態を検出するアライメント検出光学系を備
えた眼科器械に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an alignment for detecting alignment state between a cornea and an apparatus main body by receiving alignment reflected light which is guided to a cornea of an eye to be examined by an alignment light projection optical system and reflected by the cornea. The present invention relates to an ophthalmologic instrument equipped with a detection optical system.
【０００２】[0002]
【従来の技術】従来から、眼科器械として被検眼に対す
る装置本体の上下左右方向の整合検出（ＸＹ方向のアラ
イメント検出）と、被検眼に対する装置本体の適正作動
距離検出（Ｚ方向のアライメント検出）とを行なうため
にアライメント検出光学系を備えた非接触式眼圧計があ
る。2. Description of the Related Art Conventionally, as ophthalmologic instruments, alignment detection in the vertical and horizontal directions of the device body with respect to the eye to be examined (alignment detection in the XY directions) and proper working distance detection of the device body with respect to the eye to be examined (alignment detection in the Z direction). There is a non-contact type tonometer equipped with an alignment detection optical system for performing.
【０００３】この非接触式眼圧計では、モニタや接眼レ
ンズ等により被検眼の前眼部を観察しつつアライメント
操作を行なうもので、ＸＹＺ方向の各アライメントが許
容範囲に入ると、これに応じて検出器の受光位置が許容
範囲内に位置すると共にその受光光量が基準値を越える
こととなり、これによって空気パルスの放出手段が駆動
されて角膜への空気パルスの放出が開始される。In this non-contact tonometer, an alignment operation is performed while observing the anterior segment of the eye to be inspected by a monitor, an eyepiece lens, etc. When each alignment in the XYZ directions falls within an allowable range, the alignment operation is performed accordingly. The light receiving position of the detector is located within the allowable range and the amount of received light exceeds the reference value, whereby the air pulse emitting means is driven and the emission of the air pulse to the cornea is started.
【０００４】この従来の非接触式眼圧計では、Ｚ方向の
狂いよりもＸＹ方向の狂いが眼圧計の測定精度に大きな
影響を与えることになるが、被検眼の反射率にバラツキ
が大きい場合には、Ｚ方向の狂いも眼圧計の測定精度に
大きな影響を与えることとなる。In this conventional non-contact tonometer, the deviation in the XY direction has a greater effect on the measurement accuracy of the tonometer than the deviation in the Z direction, but when the reflectance of the eye to be examined has a large variation. The deviation in the Z direction greatly affects the measurement accuracy of the tonometer.
【０００５】このことを考慮して、Ｚ方向の許容範囲を
狭く設定するためにアライメント検出光学系の検出倍率
を高倍率に設定すると共に検出器直前に絞りを設置し、
装置本体に対する作動距離が少しでも狂った場合には、
像を大きく変化させて検出器に入射されるアライメント
反射光束を絞りにより制限することで、適正作動距離か
らの少しのズレで検出器に入射する光量を大きく変化さ
せることができる。In consideration of this, in order to set the allowable range in the Z direction to be narrow, the detection magnification of the alignment detection optical system is set to a high magnification and the diaphragm is installed immediately before the detector.
If the working distance with respect to the device body is a little off,
By restricting the alignment reflected light flux entering the detector by changing the image greatly, the amount of light entering the detector can be greatly changed with a slight deviation from the proper working distance.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、この非
接触式眼圧計のように被検眼に対する装置本体のＸＹ方
向の整合検出を厳密に行なわなければ測定精度が保証さ
れない眼科器械の場合には、アライメント検出光学系の
検出倍率を高くすると、角膜の反射率の相違によるＺ方
向の狂いを回避させることはできるが、ＸＹ方向の整合
精度の狂いが大きくなり、結果として測定精度が一層保
証されないこととなる。However, in the case of an ophthalmologic instrument such as this non-contact tonometer in which the measurement accuracy cannot be guaranteed unless strict alignment detection of the device main body with respect to the eye to be examined is performed in the XY directions, alignment is required. By increasing the detection magnification of the detection optical system, it is possible to avoid deviation in the Z direction due to the difference in the reflectance of the cornea, but the deviation in the alignment accuracy in the XY directions becomes large, and as a result, the measurement accuracy is not guaranteed further. Become.
【０００７】本発明は上記事情に鑑みなされたものであ
って、被検眼に対する装置本体の上下左右方向のアライ
メント精度を維持しつつ被検眼の反射率のバラツキに起
因する作動距離検出精度の低下を回避することができる
眼科器械を提供することを目的とする。The present invention has been made in view of the above circumstances, and it is possible to maintain the alignment accuracy of the device main body in the vertical and horizontal directions with respect to the eye to be inspected while reducing the accuracy of the working distance detection due to the variation in the reflectance of the eye to be inspected. It is an object to provide an ophthalmologic instrument that can be avoided.
【０００８】[0008]
【課題を解決するための手段】本発明はその目的を達成
するため、被検眼の角膜からのアライメント反射光を受
光することにより被検眼から装置本体までの作動距離と
被検眼に対する前記装置本体の上下左右方向のアライメ
ント状態とを検出するアライメント検出光学系が作動距
離検出用光学系と上下左右検出用光学系とから構成され
ていると共に、前記作動距離検出用光学系の検出倍率が
前記上下左右検出用光学系の検出倍率に比べて高倍であ
ることを要旨とする。In order to achieve the object, the present invention receives the alignment reflected light from the cornea of the eye to be inspected to thereby detect the working distance from the eye to the apparatus and the apparatus body to the eye. An alignment detection optical system for detecting the alignment state in the up, down, left, and right directions is composed of a working distance detection optical system and a top, bottom, left, and right detection optical system, and the detection magnification of the working distance detection optical system is the top, bottom, left, and right. The gist is that the magnification is higher than the detection magnification of the detection optical system.
【０００９】[0009]
【作用】このような構成においては、被検眼の角膜から
のアライメント反射光を受光するアライメント検出光学
系が作動距離検出用光学系と上下左右方向検出用光学系
とで構成され、検出倍率の高い作動距離検出用光学系に
より被検眼から装置本体までの作動距離が検出され、検
出倍率の低い上下左右検出用光学系により被検眼に対す
る装置本体の上下左右方向のアライメント状態が検出さ
れる。In this structure, the alignment detection optical system for receiving the alignment reflected light from the cornea of the eye to be inspected is composed of the working distance detecting optical system and the vertical and horizontal direction detecting optical system, and has a high detection magnification. The working distance detection optical system detects the working distance from the eye to be inspected to the apparatus body, and the up / down / left / right detection optical system having a low detection magnification detects the alignment state of the apparatus body in the up / down / left / right directions with respect to the eye to be inspected.
【００１０】[0010]
【実施例】次に、本発明の眼科器械の実施例を図１乃至
図３に基づいて説明する。EXAMPLE An example of the ophthalmologic apparatus of the present invention will be described below with reference to FIGS.
【００１１】図１乃至図３は本発明の眼科器械の実施例
を示し、図１は被検眼観察状態の光学系の説明図、図２
はアライメント検出状態の光学系の説明図、図３は眼圧
測定状態の光学系の説明図である。1 to 3 show an embodiment of an ophthalmologic apparatus of the present invention, FIG. 1 is an explanatory view of an optical system in an observation state of an eye to be examined, and FIG.
Is an explanatory diagram of the optical system in the alignment detection state, and FIG. 3 is an explanatory diagram of the optical system in the intraocular pressure measurement state.
【００１２】図１〜図３において、１０は固視用の注視
目標を被検眼Ｅに投影する固視標投影光学系、２０は被
検眼Ｅを含めて前眼部像を観察する前眼部観察光学系、
３０は被検眼Ｅにアライメント光束を投影するアライメ
ント光投影光学系、４０は被検眼Ｅの視軸Ｏ’と前眼部
観察光学系２０の光軸Ｏとの整合状態を観察するアライ
メント観察光学系、５０は被検眼Ｅに対する装置本体の
作動距離を含めて視軸Ｏ’と光軸Ｏとの整合を検出する
上下左右方向検出用光学系（以下、『第１検出系』と略
す。）、５０は被検眼Ｅに対する装置本体の作動距離を
含めて視軸Ｏ’と光軸Ｏとの整合を検出する作動距離検
出用光学系（以下、『第２検出系』と略す。）、７０は
角膜変形検出光の反射を受光する検出光受光光学系であ
る。1 to 3, 10 is a fixation target projection optical system for projecting a fixation target for fixation onto the eye E, and 20 is an anterior segment for observing an anterior segment image including the eye E. Observation optics,
Reference numeral 30 denotes an alignment light projection optical system for projecting an alignment light beam onto the eye E to be inspected, and 40 is an alignment observation optical system for observing the alignment state between the visual axis O ′ of the eye E and the optical axis O of the anterior segment observation optical system 20. , 50 are vertical and horizontal direction detection optical systems (hereinafter abbreviated as “first detection system”) for detecting the alignment between the visual axis O ′ and the optical axis O including the working distance of the apparatus main body to the eye E to be examined. Reference numeral 50 denotes a working distance detection optical system (hereinafter, abbreviated as "second detection system") for detecting the alignment between the visual axis O'and the optical axis O including the working distance of the apparatus main body to the eye E to be inspected. It is a detection light receiving optical system that receives the reflection of the corneal deformation detection light.
【００１３】固視標投影光学系１０は、可視光を出射す
るＬＥＤ１１、開口絞り１２、可視光を透過し且つ近赤
外光を反射する波長分割フィルター１３、コリメータレ
ンズ１４、絞り１５、ハーフミラー１６、チャンバー窓
１７、噴射ノズル１８を有する。The fixation target projection optical system 10 includes an LED 11 that emits visible light, an aperture stop 12, a wavelength division filter 13 that transmits visible light and reflects near infrared light, a collimator lens 14, a stop 15, and a half mirror. 16, a chamber window 17, and an injection nozzle 18.
【００１４】チャンバー窓１７は、噴射ノズル１８に空
気パルスを供給するための供給装置（例えば、シリンダ
部材）を包囲する枠体となっている。The chamber window 17 is a frame body surrounding a supply device (for example, a cylinder member) for supplying an air pulse to the injection nozzle 18.
【００１５】ＬＥＤ１１から出射された注視目標となる
可視光は、図２に示すように、開口絞り１２及び波長分
割フィルター１３を通過してコリメータレンズ１４によ
り平行光束とされ、絞り１５により絞り像とされた状態
でハーフミラー１６に反射された後、チャンバー窓１７
を透過し、さらに、噴射ノズル１８の内部を通って被検
眼Ｅの角膜Ｃに絞り像が提示される。尚、角膜Ｃに反射
された可視光は対物レンズ１１により反射されてそれ以
降の光学部材へは導かれないように設定されている。As shown in FIG. 2, visible light emitted from the LED 11 as a gaze target passes through the aperture stop 12 and the wavelength division filter 13 and is collimated by the collimator lens 14 to form a stop image by the stop 15. After being reflected by the half mirror 16 in the state of being kept, the chamber window 17
Through the injection nozzle 18, and a iris image is presented on the cornea C of the eye E to be inspected. The visible light reflected on the cornea C is set so as to be reflected by the objective lens 11 and not guided to the optical members thereafter.
【００１６】前眼部観察光学系２０は、左右から被検眼
Ｅをダイレクトに照明する赤外光を出射するＬＥＤ２
１、噴射ノズル１８の先端に固定のカバーガラス２２、
可視光を反射する対物レンズ１９、チャンバー窓１７、
ハーフミラー１６、ハーフミラー２３、全反射ミラー２
４、第１結像レンズ２５、第２結像レンズ２６、全反射
ミラー２７、ハーフミラー２８、ＣＣＤカメラ２９を有
する。The anterior ocular segment observing optical system 20 emits infrared light that directly illuminates the subject's eye E from the left and right.
1, a cover glass 22 fixed to the tip of the injection nozzle 18,
An objective lens 19 that reflects visible light, a chamber window 17,
Half mirror 16, half mirror 23, total reflection mirror 2
4, a first imaging lens 25, a second imaging lens 26, a total reflection mirror 27, a half mirror 28, and a CCD camera 29.
【００１７】被検眼Ｅに反射されたＬＥＤ２１からの赤
外反射光は、カバーガラス２２を透過して対物レンズ１
９により平行光束とされ、チャンバー窓１７及びハーフ
ミラー１６を透過してハーフミラー２３に反射された
後、全反射ミラー２４に反射され、さらに、第１，第２
結像レンズ２５，２６に集光され、全反射ミラー２７及
びハーフミラー２８を経てＣＣＤカメラ２９に結像され
る。尚、装置本体と角膜Ｃとの距離が離れている場合に
は、公知の手段により第２結像レンズ２６を矢印イ方向
に移動させてピント合わせを行なう。The infrared reflected light from the LED 21 reflected by the eye E to be examined passes through the cover glass 22 and the objective lens 1
The light beam is collimated by 9 and transmitted through the chamber window 17 and the half mirror 16 to be reflected by the half mirror 23, and then reflected by the total reflection mirror 24.
The light is focused on the imaging lenses 25 and 26, and is focused on the CCD camera 29 via the total reflection mirror 27 and the half mirror 28. When the distance between the main body of the apparatus and the cornea C is long, the second imaging lens 26 is moved in the direction of arrow A by a known means to focus.
【００１８】アライメント光投影光学系３０は、近赤外
光を出射するＬＥＤ３１、開口絞り３２、波長分割フィ
ルター１３、コリメータレンズ１４、絞り１５、ハーフ
ミラー１６、チャンバー窓１７、噴射ノズル１８を有す
る。The alignment light projection optical system 30 has an LED 31 for emitting near infrared light, an aperture stop 32, a wavelength division filter 13, a collimator lens 14, a stop 15, a half mirror 16, a chamber window 17, and an injection nozzle 18.
【００１９】ＬＥＤ３１から出射された近赤外光は、図
１に示すように、開口絞り３２を通過して波長分割フィ
ルター１３に反射され、コリメータレンズ１４により平
行光束とされて絞り１５により絞り像とされた状態でハ
ーフミラー１６に反射された後、チャンバー窓１７を透
過し、さらに、噴射ノズル１８の内部を通って被検眼Ｅ
の角膜Ｃに投影され、この角膜Ｃで反射される。As shown in FIG. 1, the near-infrared light emitted from the LED 31 passes through the aperture stop 32, is reflected by the wavelength division filter 13, is converted into a parallel light flux by the collimator lens 14, and a stop image is obtained by the stop 15. After being reflected by the half mirror 16 in such a state, the light passes through the chamber window 17 and further passes through the inside of the injection nozzle 18 to be examined.
Is projected on the cornea C and reflected by the cornea C.
【００２０】アライメント観察光学系４０は、カバーガ
ラス２２、対物レンズ１９、チャンバー窓１７、ハーフ
ミラー１６、ハーフミラー２３、ハーフミラー２３と交
差する方向に傾斜されたハーフミラー４１、結像レンズ
４２、ハーフミラー２８、ＣＣＤカメラ２９を有する。The alignment observation optical system 40 includes a cover glass 22, an objective lens 19, a chamber window 17, a half mirror 16, a half mirror 23, a half mirror 41 inclined in a direction intersecting with the half mirror 23, an imaging lens 42, and It has a half mirror 28 and a CCD camera 29.
【００２１】角膜Ｃで反射されたアライメント反射光束
は、カバーガラス２２を透過して対物レンズ１９により
平行光束とされ、チャンバー窓１７、ハーフミラー１
６、ハーフミラー２３、ハーフミラー４１を透過して結
像レンズ４２に導かれてこの結像レンズ４２で集光され
た後、ハーフミラー２８を透過してＣＣＤカメラ２９に
結像される。The alignment-reflected light beam reflected by the cornea C is transmitted through the cover glass 22 to be a parallel light beam by the objective lens 19, and the chamber window 17 and the half mirror 1
6. After passing through the half mirror 23 and the half mirror 41, it is guided to the image forming lens 42 and is condensed by the image forming lens 42. Then, it is transmitted through the half mirror 28 and an image is formed on the CCD camera 29.
【００２２】第１検出系５０は、低倍（×１．０未満）
で視軸Ｏ’と光軸Ｏとの整合監視用として用いられ、カ
バーガラス２２からハーフミラー４１に至るアライメン
ト観察光学系４０の各光学部材を共用していると共に、
中心部に全反射ミラー５１ａを設けたハーフミラー５
１、ハーフミラー５２、結像レンズ５３、絞り５４、受
光センサ５５を有する。The first detection system 50 has a low magnification (less than × 1.0).
Is used for alignment monitoring of the visual axis O ′ and the optical axis O, and shares each optical member of the alignment observation optical system 40 from the cover glass 22 to the half mirror 41.
Half mirror 5 having a total reflection mirror 51a in the center
1, a half mirror 52, an imaging lens 53, a diaphragm 54, and a light receiving sensor 55.
【００２３】第２検出系６０は、高倍（×２．０以上）
で作動距離検出用として用いられ、第１検出系５０と同
様に、カバーガラス２２からハーフミラー４１に至るア
ライメント観察光学系４０の各光学部材を共用している
と共に、ハーフミラー５１、ハーフミラー５２、結像レ
ンズ６１、全反射ミラー６２、絞り６３、受光センサ６
４を有する。The second detection system 60 has a high magnification (× 2.0 or more).
In the same manner as the first detection system 50, each optical member of the alignment observation optical system 40 from the cover glass 22 to the half mirror 41 is shared, and the half mirror 51 and the half mirror 52 are used. , Imaging lens 61, total reflection mirror 62, diaphragm 63, light receiving sensor 6
Have 4.
【００２４】角膜Ｃに反射されてハーフミラー４１に導
かれたアライメント反射光束は、このハーフミラー４１
に反射され、ハーフミラー５１の周縁部を透過してハー
フミラー５２に導かれる。The alignment reflected light flux reflected by the cornea C and guided to the half mirror 41 is the half mirror 41.
Is reflected by the half mirror 51, is transmitted through the peripheral portion of the half mirror 51, and is guided to the half mirror 52.
【００２５】一方、ハーフミラー５２に導かれたアライ
メント反射光束の一部は、ハーフミラー５２に反射され
て結像レンズ５３に導かれた後、絞り５４を経て受光セ
ンサ５５に結像される。また、ハーフミラー５２に導か
れたアライメント反射光束のその他の一部はハーフミラ
ー５２を透過して結像レンズ６１に導かれた後、全反射
ミラー６２により反射され、絞り６３を経て受光センサ
６４に結像される。On the other hand, a part of the alignment reflected light flux guided to the half mirror 52 is reflected by the half mirror 52 and guided to the image forming lens 53, and then is imaged on the light receiving sensor 55 via the diaphragm 54. The other part of the alignment reflected light flux guided to the half mirror 52 passes through the half mirror 52, is guided to the imaging lens 61, is reflected by the total reflection mirror 62, and passes through the diaphragm 63 to receive the light receiving sensor 64. Is imaged.
【００２６】受光センサ５５，６４は、共に所定の光量
以上にアライメント反射光量が達していると判断した場
合に整合が完了したことを検出し、この光量検出に基づ
いて噴射ノズル１８から空気パルスを自動的に噴射す
る。The light receiving sensors 55 and 64 detect that the alignment is completed when both of the light quantities of the alignment reflected light have reached a predetermined light quantity or more, and detect the light quantity from the injection nozzle 18 based on the light quantity detection. Fire automatically.
【００２７】従って、低倍率の第１検出系５０により視
軸Ｏと光軸Ｏ’との整合を検出し、高倍率の第２検出系
６０により作動距離の検出をすることにより角膜Ｃの反
射率の相違による測定誤差を少なくすることができる。Therefore, the low-magnification first detection system 50 detects the alignment between the visual axis O and the optical axis O ', and the high-magnification second detection system 60 detects the working distance to reflect the cornea C. The measurement error due to the difference in the rate can be reduced.
【００２８】ところで、アライメント光投影光学系３０
のＬＥＤ３１から噴射ノズル１８に至る各光学部材は、
図３に示すように、噴射ノズル１８からの空気パルスの
噴射による角膜Ｃの変形を光学的に検出するために角膜
Ｃに向けて角膜変形検出光を投影する検出光投影光学系
として機能し、角膜Ｃから反射された反射光をハーフミ
ラー４１に導く各光学部材は検出光受光光学系７０の一
部を構成する。By the way, the alignment light projection optical system 30
Each optical member from the LED 31 to the injection nozzle 18 is
As shown in FIG. 3, it functions as a detection light projection optical system that projects corneal deformation detection light toward the cornea C in order to optically detect the deformation of the cornea C due to the ejection of the air pulse from the ejection nozzle 18. Each optical member that guides the reflected light reflected from the cornea C to the half mirror 41 constitutes a part of the detection light receiving optical system 70.
【００２９】空気パルスの噴射によって圧平された角膜
Ｃからハーフミラー４１に導かれた検出反射光は、その
一部はハーフミラー５１に向けて反射され、このハーフ
ミラー５１の全反射ミラー５１ａに反射されて結像レン
ズ７１に集光され、絞り７２を経て受光素子７３に結像
される。A part of the detection reflected light guided to the half mirror 41 from the cornea C flattened by the jet of the air pulse is reflected toward the half mirror 51, and is reflected by the total reflection mirror 51a of the half mirror 51. The reflected light is focused on the imaging lens 71, and is focused on the light receiving element 73 through the diaphragm 72.
【００３０】受光素子７３では、角膜Ｃの変形開始と共
に受光素子７３の受光量が増加するため、この角膜Ｃの
変形に伴う受光量の増加に基づき公知の手順に従って眼
圧が測定される。In the light receiving element 73, the amount of light received by the light receiving element 73 increases with the start of the deformation of the cornea C. Therefore, the intraocular pressure is measured according to a known procedure based on the increase in the amount of light received with the deformation of the cornea C.
【００３１】一方、ハーフミラー４１に導かれた検出反
射光のその他の一部はハーフミラー４１を透過して結像
レンズ４２に導かれ、ハーフミラー２８を経てＣＣＤカ
メラ２９に結像される。On the other hand, the other part of the detection reflected light guided to the half mirror 41 passes through the half mirror 41 and is guided to the imaging lens 42, and is imaged on the CCD camera 29 via the half mirror 28.
【００３２】ＣＣＤカメラ２９に結像された角膜変形検
出光は、圧平状態の被検眼の前眼部像として図示しない
モニタに画面表示され、被検者はこの像により圧平時の
被検眼の状態を確認することができ、得られた眼圧値が
信頼できるものであるか否かを客観的に確認することが
できる。The corneal deformation detection light imaged on the CCD camera 29 is displayed on a monitor (not shown) as an anterior ocular segment image of the eye under applanation on a monitor (not shown), and the image shows the subject's eye under applanation. The state can be confirmed, and it can be objectively confirmed whether or not the obtained intraocular pressure value is reliable.
【００３３】[0033]
【発明の効果】以上説明したように、本発明の眼科器械
にあっては、アライメント検出光学系を作動距離検出用
光学系と上下左右方向検出用光学系とで構成すると共
に、作動距離検出用光学系の検出倍率を上下左右方向検
出用光学系の検出倍率よりも高倍としたことにより、被
検眼に対する装置本体の上下左右方向のアライメント精
度を維持しつつ被検眼の反射率のバラツキに起因する作
動距離検出精度の低下を回避することができる。As described above, in the ophthalmologic apparatus of the present invention, the alignment detecting optical system is composed of the working distance detecting optical system and the vertical and horizontal direction detecting optical system, and the working distance detecting optical system is used. By making the detection magnification of the optical system higher than that of the optical system for detecting the vertical and horizontal directions, it is caused by the variation in the reflectance of the eye to be examined while maintaining the alignment accuracy of the apparatus main body with respect to the eye to be examined in the vertical and horizontal directions. It is possible to avoid a decrease in working distance detection accuracy.
【図１】本発明の眼科器械を示し、被検眼観察状態の光
学系の説明図である。FIG. 1 is an explanatory diagram of an optical system of an ophthalmologic apparatus of the present invention, which is in an observation state of an eye to be examined.
【図２】同じく、アライメント検出状態の光学系の説明
図である。FIG. 2 is likewise an explanatory view of the optical system in an alignment detection state.
【図３】同じく、眼圧測定状態の光学系の説明図であ
る。FIG. 3 is likewise an explanatory diagram of the optical system in a state of measuring intraocular pressure.
Ｃ…角膜 Ｅ…被検眼 ５０…上下左右方向検出用光学系 ６０…作動距離検出用光学系 C ... Cornea E ... Eye to be inspected 50 ... Optical system for detecting vertical and horizontal directions 60 ... Optical system for detecting working distance
Claims (1)
を受光することにより被検眼から装置本体までの作動距
離と被検眼に対する前記装置本体の上下左右方向のアラ
イメント状態とを検出するアライメント検出光学系が作
動距離検出用光学系と上下左右検出用光学系とから構成
されていると共に、前記作動距離検出用光学系の検出倍
率が前記上下左右検出用光学系の検出倍率に比べて高倍
であることを特徴とする眼科器械。1. An alignment detection optical system for detecting the working distance from the eye to be inspected to the apparatus body and the alignment state of the apparatus body in the vertical and horizontal directions with respect to the eye by receiving alignment reflected light from the cornea of the eye to be inspected. Is composed of a working distance detection optical system and an up / down / left / right detection optical system, and the detection magnification of the working distance detection optical system is higher than the detection magnification of the up / down / left / right detection optical system. Ophthalmic instrument characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31962893A JP3452388B2 (en) | 1993-12-20 | 1993-12-20 | Ophthalmic instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31962893A JP3452388B2 (en) | 1993-12-20 | 1993-12-20 | Ophthalmic instruments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07171103A true JPH07171103A (en) | 1995-07-11 |
| JP3452388B2 JP3452388B2 (en) | 2003-09-29 |
Family
ID=18112415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31962893A Expired - Fee Related JP3452388B2 (en) | 1993-12-20 | 1993-12-20 | Ophthalmic instruments |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3452388B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001275985A (en) * | 2000-03-30 | 2001-10-09 | Topcon Corp | Ophthalmological apparatus |
-
1993
- 1993-12-20 JP JP31962893A patent/JP3452388B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001275985A (en) * | 2000-03-30 | 2001-10-09 | Topcon Corp | Ophthalmological apparatus |
| JP4531190B2 (en) * | 2000-03-30 | 2010-08-25 | 株式会社トプコン | Ophthalmic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3452388B2 (en) | 2003-09-29 |
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