JPH0739518A - Optometry apparatus - Google Patents

Optometry apparatus

Info

Publication number
JPH0739518A
JPH0739518A JP5208971A JP20897193A JPH0739518A JP H0739518 A JPH0739518 A JP H0739518A JP 5208971 A JP5208971 A JP 5208971A JP 20897193 A JP20897193 A JP 20897193A JP H0739518 A JPH0739518 A JP H0739518A
Authority
JP
Japan
Prior art keywords
slit
eye
light
optical system
lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5208971A
Other languages
Japanese (ja)
Inventor
Yoshi Kobayakawa
嘉 小早川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP5208971A priority Critical patent/JPH0739518A/en
Publication of JPH0739518A publication Critical patent/JPH0739518A/en
Pending legal-status Critical Current

Links

Landscapes

  • Eye Examination Apparatus (AREA)

Abstract

PURPOSE:To measure scattering characteristic of the anterior chamber of eye to be examined precisely in a simple structure. CONSTITUTION:The luminous flux from a storoboscopic light source 1 reaches anterior chamber Ea of a subject eye E in the oblique direction through a slit 2 shorter than the side of an imaging picture, rectangular opening 3 and the lens 4, and the scattering light is observed an optometrist through a lens 5, optical dividing material 6, aperture 7 and lens 8. The luminous flux reflected by the optical dividing material 6 is caught by an image pickup device 9 having a side longer than the length of the slit 2 and memorized in a signal processing apparatus 10 and then a fundus image with the lighting part and the non lighting part is displayed on a television monitor 11.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、眼科医院等において用
いられる検眼装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus used in an ophthalmology clinic or the like.

【0002】[0002]

【従来の技術】従来、被検眼の前房混濁測定では、レー
ザー光束を被検眼の前眼部に照射し、前眼部の所定区域
内を駆動機構によりレーザー光束を走査し、前房水中の
蛋白や細胞等による散乱光を光電素子等で受光し、散乱
光強度の信号を信号処理器で演算して、蛋白濃度や細胞
数等の情報を求めている。
2. Description of the Related Art Conventionally, in the anterior chamber opacity measurement of an eye to be examined, a laser beam is applied to the anterior segment of the eye, and a laser beam is scanned by a drive mechanism in a predetermined area of the anterior segment of the anterior chamber. Light scattered by proteins or cells is received by a photoelectric element or the like, and the signal of scattered light intensity is calculated by a signal processor to obtain information such as protein concentration or cell number.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上述の
従来例のような検眼装置では、前眼部をレーザー光束で
平面的に走査して散乱光を受光するので、前眼部の平面
方向の分解能は得られるが、レーザー光の光軸方向の分
解能がなく、このため目視検査の結果と対応する情報が
得られないという問題がある。
However, in the optometry apparatus as in the above-mentioned conventional example, since the anterior segment of the eye is planarly scanned with the laser beam and the scattered light is received, the resolution in the plane direction of the anterior segment of the eye. However, since there is no resolution in the optical axis direction of the laser light, there is a problem that information corresponding to the result of visual inspection cannot be obtained.

【0004】本発明の目的は、上述の問題を解決し、構
造が簡単で精度の高い被検眼の前房の散乱特性を測定す
る検眼装置を提供することにある。
An object of the present invention is to solve the above-mentioned problems and to provide an optometry apparatus which has a simple structure and has a high accuracy, and which measures the scattering characteristics of the anterior chamber of the eye to be examined.

【0005】[0005]

【課題を解決するための手段】上述の目的を達成するた
めの本発明に係る検眼装置は、撮像画面辺よりも短いス
リットで前眼部を照明する照明光学系と、該照明光学系
とは異なる方向に設けた撮像光学系と、該撮像光学系の
前記撮像画面上の光量分布を解析し被検眼の前房の散乱
特性を計測する計測手段とを有することを特徴とする。
The optometry apparatus according to the present invention for achieving the above object comprises an illumination optical system for illuminating the anterior segment with a slit shorter than a side of an imaging screen, and the illumination optical system. It is characterized by comprising an imaging optical system provided in different directions and a measuring means for analyzing a light amount distribution on the imaging screen of the imaging optical system and measuring the scattering characteristic of the anterior chamber of the eye to be examined.

【0006】[0006]

【作用】上述の構成を有する検眼装置は、被検眼の前眼
部に撮像画面辺よりも短いスリットによるスリット光束
を照射し、照明光学系とは異なる方向で反射光を受光し
て撮像画面の光量分布を求め、この情報から被検眼の前
房の散乱特性を測定する。
The optometry apparatus having the above-described structure irradiates the anterior segment of the eye to be examined with a slit light flux having a slit shorter than the imaging screen side, receives reflected light in a direction different from the illumination optical system, and The light quantity distribution is obtained, and the scattering characteristics of the anterior chamber of the eye to be examined are measured from this information.

【0007】[0007]

【実施例】本発明を図示の実施例に基づいて詳細に説明
する。図1は第1の実施例の構成図を示し、被検眼Eの
斜め前方方向に照明光学系が配置され、照明光学系と略
90°の角を成す斜め前方方向に結像光学系が配置され
ている。照明光学系はストロボ光源1、紙面に垂直な方
向に長さを有するスリット2、結像時の焦点深度を深く
するための矩形開口3、レンズ4が光路上に順次に配列
されている。また、結像光学系は被検眼E側から光路上
に順次に、観察撮影用結像レンズ5、光分割部材6、ア
パーチャ7、観察用接眼レンズ8が配列され、光分割部
材6の反射方向には、CCDセンサ等の撮像素子9が設
けられ、撮像素子9の出力は信号処理器10とテレビモ
ニタ11に接続されている。なお、スリット2の長さは
撮像素子9の一辺の長さよりも短くされている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiments. FIG. 1 shows a configuration diagram of the first embodiment, in which an illumination optical system is arranged in a diagonally forward direction of an eye E to be examined, and an imaging optical system is arranged in a diagonally forward direction forming an angle of about 90 ° with the illumination optical system. Has been done. In the illumination optical system, a strobe light source 1, a slit 2 having a length in a direction perpendicular to the paper surface, a rectangular aperture 3 for increasing the depth of focus at the time of image formation, and a lens 4 are sequentially arranged on the optical path. In the imaging optical system, the imaging lens 5 for observation and photographing, the light splitting member 6, the aperture 7, and the eyepiece 8 for observation are arranged in order from the eye E side on the optical path, and the reflection direction of the light splitting member 6 is arranged. An image pickup device 9 such as a CCD sensor is provided in the computer, and the output of the image pickup device 9 is connected to a signal processor 10 and a television monitor 11. The length of the slit 2 is shorter than the length of one side of the image sensor 9.

【0008】また、ストロボ光源1にはシャッタ釦12
を有するジョイスティック13の出力が接続され、更に
ジョイスティック13の出力は信号処理器10にも接続
されている。なお、照明光学系と結像光学系の位置関係
は必ずしも90°に配置する必要はないが、90°に近
い方が照明光源のスリット光が細くなるので測定には有
利である。また、アライメントのための前眼部の照明に
は図示しないランプ光源を使用している。
A shutter button 12 is attached to the flash light source 1.
Is connected to the output of the joystick 13, and the output of the joystick 13 is also connected to the signal processor 10. The positional relationship between the illumination optical system and the imaging optical system does not necessarily have to be set at 90 °, but the closer to 90 ° it is advantageous for measurement because the slit light of the illumination light source becomes thinner. A lamp light source (not shown) is used for illuminating the anterior segment for alignment.

【0009】アライメントの終了後に、ジョイスティッ
ク13のシャッタ釦12を操作しストロボ光源1を発光
させると、その光束はスリット2、開口3、レンズ4を
通り、スリット像を被検眼Eの前房Eaに結像する。光束
は前房Ea内の蛋白質等により散乱され、結像レンズ5、
光分割部材6を透過して一旦アパーチャ7において結像
し、観察用接眼レンズ8を介して検者眼eにより観察さ
れる。
After the alignment is completed, when the shutter button 12 of the joystick 13 is operated to cause the strobe light source 1 to emit light, the luminous flux passes through the slit 2, the opening 3 and the lens 4, and the slit image is directed to the anterior chamber Ea of the eye E to be examined. Form an image. The light flux is scattered by proteins and the like in the anterior chamber Ea, and the imaging lens 5,
After passing through the light splitting member 6, an image is once formed at the aperture 7, and is observed by the examiner's eye e through the observation eyepiece 8.

【0010】一方、光分割部材6を反射した光束は撮像
素子9に達し、瞬間的に撮像素子9で受光された信号を
信号処理器10に取り込む。ストロボ発光時間は1mS
程度の短い時間なので、撮像素子9からの信号は電子シ
ャッタを使用して、この間の蓄積電荷のみを信号として
利用するとよい。撮像素子9からの画像信号は信号処理
器10内のメモリに記憶されると共に、他方はテレビモ
ニタ11に画像として表示される。スリット2の長さは
撮像素子9の一辺よりも短いので、テレビモニタ11に
表示される画面は、中央部の照明された部分Cと、画面
も上下両側の照明されない部分Dから成る。
On the other hand, the light beam reflected by the light splitting member 6 reaches the image pickup device 9 and instantaneously receives the signal received by the image pickup device 9 in the signal processor 10. Strobe emission time is 1 ms
Since the time is short, the signal from the image pickup device 9 may use an electronic shutter, and only the charge accumulated during this period may be used as a signal. The image signal from the image sensor 9 is stored in the memory in the signal processor 10, and the other is displayed as an image on the television monitor 11. Since the length of the slit 2 is shorter than one side of the image sensor 9, the screen displayed on the television monitor 11 is composed of a central illuminated portion C and a non-illuminated portion D on the upper and lower sides of the screen.

【0011】図2はテレビモニタ11の画面上の縦線F
の光量分布を表す信号を示している。高さL1は照明され
ていない部分Dの信号レベルを表し、主として角膜等に
よる二次散乱光や外乱光、更には電気的ノイズによる信
号である。高さL2は照明されている部分Cの信号レベル
を表し、その差L2−L1から蛋白濃度を求めることができ
る。即ち、この部分の信号が位置により変化するので、
その変化の割合を求めることにより蛋白質の同定を行う
ことができる。高さL3は細胞Gによる散乱光の信号レベ
ルを表し、強度が一段と強いので、所定の閾値を決めて
画面内を走査することにより細胞の個数を測定すること
ができる。
FIG. 2 shows a vertical line F on the screen of the television monitor 11.
The signal showing the distribution of the light amount is shown. The height L1 represents the signal level of the non-illuminated portion D, and is mainly a signal due to secondary scattered light or disturbance light due to the cornea or the like, and electrical noise. The height L2 represents the signal level of the illuminated portion C, and the protein concentration can be determined from the difference L2-L1. That is, since the signal in this part changes depending on the position,
The protein can be identified by determining the rate of the change. The height L3 represents the signal level of the scattered light by the cells G, and the intensity is much stronger. Therefore, the number of cells can be measured by determining a predetermined threshold value and scanning the screen.

【0012】蛋白濃度はスリット幅やストロボの光量に
依存するので、これらを自動又は手動により信号処理器
10に入力し、演算を行うことにより正確な蛋白濃度の
測定値を求めることができる。また、撮像素子9をカラ
ー対応とすると、濃度情報の他に色彩の情報も求めるこ
とができる。このようにして求めた計測結果は、解析結
果A、インデックスI、撮像条件B等をテレビモニタ1
1の画面に合成して表示し、画像情報として記憶保存す
ることができる。
Since the protein concentration depends on the slit width and the amount of strobe light, an accurate measured value of the protein concentration can be obtained by automatically or manually inputting these to the signal processor 10. If the image sensor 9 is color-enabled, it is possible to obtain color information as well as density information. The measurement result obtained in this way is obtained by analyzing the analysis result A, the index I, the imaging condition B, etc.
It can be combined and displayed on one screen and stored and saved as image information.

【0013】図3は第2の実施例の光源部を示し、第1
の実施例のストロボ光源1の代りにレーザー光源14が
用いられている。レーザー光源14の前方には、レーザ
ー光を遮蔽するシャッタから成る遮蔽部15と、この遮
蔽部15を駆動するためのモータ等の操作部16が設け
られている。この操作部16は第1の実施例のジョイス
ティック13のシャッタ釦12に接続されている。
FIG. 3 shows the light source section of the second embodiment, and
A laser light source 14 is used in place of the strobe light source 1 of the above embodiment. In front of the laser light source 14, there are provided a shielding portion 15 which is a shutter for shielding the laser light, and an operation portion 16 such as a motor for driving the shielding portion 15. The operation unit 16 is connected to the shutter button 12 of the joystick 13 of the first embodiment.

【0014】この操作はジョイスティック13のシャッ
タ釦12を動かすことにより、操作部16が作動し遮蔽
部15が開きレーザー光源14のレーザー光が発射され
る。なお、半導体レーザー光源を使用する場合は、瞬間
的にレーザー光を発射できるので遮蔽部15及び操作部
16は不要である。
In this operation, when the shutter button 12 of the joystick 13 is moved, the operation portion 16 is operated and the shield portion 15 is opened, and the laser light of the laser light source 14 is emitted. In addition, when using a semiconductor laser light source, since the laser beam can be emitted instantaneously, the shielding unit 15 and the operation unit 16 are not necessary.

【0015】また、一般のホトスリットランプと信号処
理器を用いて同様のシステムを構成し、同様の効果を得
ることもできる。この場合は、図4に示すような較正用
セル17を被検眼Eの代りに用いて較正を行うことがで
きる。即ち、較正用セル17はガラスのケース18の中
に懸濁液19を入れた構造とされている。この較正用セ
ル17により計測値の較正を行えば、CCDカメラ等の
撮像素子の代りに一般のテレビカメラを使って撮影する
ことができる。
Further, a similar system can be constructed by using a general photo slit lamp and a signal processor to obtain the same effect. In this case, the calibration cell 17 as shown in FIG. 4 can be used instead of the eye E to be calibrated. That is, the calibration cell 17 has a structure in which a suspension 19 is placed in a glass case 18. If the measurement value is calibrated by the calibration cell 17, a general television camera can be used in place of an image pickup device such as a CCD camera for photographing.

【0016】[0016]

【発明の効果】以上説明したように本発明に係る検眼装
置は、撮像画面辺よりも短いスリット光束を用い、受光
した散乱光の撮像画面より求めた光量分布から前房散乱
特性を求めることにより、可動部のない簡単な構造で目
視観察と対応する精度の良い測定が可能となり、同時に
画像の記録もできる。
As described above, the optometry apparatus according to the present invention uses the slit light flux shorter than the image pickup screen side and obtains the anterior chamber scattering characteristic from the light amount distribution of the received scattered light obtained from the image pickup screen. With a simple structure without moving parts, it is possible to perform accurate measurement corresponding to visual observation, and at the same time record images.

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

【図1】第1の実施例の構成図である。FIG. 1 is a configuration diagram of a first embodiment.

【図2】散乱光分布信号の説明図である。FIG. 2 is an explanatory diagram of a scattered light distribution signal.

【図3】第2の実施例の光源部の構成図である。FIG. 3 is a configuration diagram of a light source unit according to a second embodiment.

【図4】較正用セルの構成図である。FIG. 4 is a configuration diagram of a calibration cell.

【符号の説明】[Explanation of symbols]

1 ストロボ光源 2 スリット 3 矩形開口 6 光分割部材 9 撮像素子 10 信号処理器 11 テレビモニタ 13 ジョイスティック 14 レーザー光源 17 較正用セル 1 Strobe Light Source 2 Slit 3 Rectangular Aperture 6 Light Splitting Member 9 Image Sensor 10 Signal Processor 11 TV Monitor 13 Joystick 14 Laser Light Source 17 Calibration Cell

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 撮像画面辺よりも短いスリットで前眼部
を照明する照明光学系と、該照明光学系とは異なる方向
に設けた撮像光学系と、該撮像光学系の前記撮像画面上
の光量分布を解析し被検眼の前房の散乱特性を計測する
計測手段とを有することを特徴とする検眼装置。
1. An illumination optical system that illuminates the anterior segment with a slit that is shorter than the side of the imaging screen, an imaging optical system provided in a direction different from the illumination optical system, and the imaging optical system on the imaging screen. An optometry apparatus comprising: a measuring unit configured to analyze a light amount distribution and measure a scattering characteristic of an anterior chamber of an eye to be inspected.
JP5208971A 1993-07-30 1993-07-30 Optometry apparatus Pending JPH0739518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5208971A JPH0739518A (en) 1993-07-30 1993-07-30 Optometry apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5208971A JPH0739518A (en) 1993-07-30 1993-07-30 Optometry apparatus

Publications (1)

Publication Number Publication Date
JPH0739518A true JPH0739518A (en) 1995-02-10

Family

ID=16565197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5208971A Pending JPH0739518A (en) 1993-07-30 1993-07-30 Optometry apparatus

Country Status (1)

Country Link
JP (1) JPH0739518A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0751229A (en) * 1993-08-09 1995-02-28 Kowa Co Corrector of ophthalmic measuring device
JP2007082640A (en) * 2005-09-21 2007-04-05 Kowa Co Correcting device for ophthalmologic apparatus
US7257865B2 (en) 2004-10-27 2007-08-21 Ykk Corporation Holder for cord fasteners
WO2018003906A1 (en) * 2016-06-30 2018-01-04 興和株式会社 Ophthalmic measurement device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0751229A (en) * 1993-08-09 1995-02-28 Kowa Co Corrector of ophthalmic measuring device
US7257865B2 (en) 2004-10-27 2007-08-21 Ykk Corporation Holder for cord fasteners
JP2007082640A (en) * 2005-09-21 2007-04-05 Kowa Co Correcting device for ophthalmologic apparatus
WO2018003906A1 (en) * 2016-06-30 2018-01-04 興和株式会社 Ophthalmic measurement device

Similar Documents

Publication Publication Date Title
US4019813A (en) Optical apparatus for obtaining measurements of portions of the eye
JP2520418B2 (en) Ophthalmic measuring device
JP3359100B2 (en) Optometry device
JPH0578330B2 (en)
JP4408640B2 (en) Ophthalmic measuring device
JP3499093B2 (en) Anterior eye section analyzer
JPH049412B2 (en)
US4950068A (en) Ophthalmic disease detection apparatus
JPH06343608A (en) Cornea shape measuring device
JPH0739518A (en) Optometry apparatus
JP2520426B2 (en) Ophthalmic measuring device
JPH11235316A (en) Optometrical device
JP4104302B2 (en) Anterior segment analysis device and anterior segment analysis program
JP5438119B2 (en) Ophthalmic measuring device
JPH06165754A (en) Ophthalmic apparatus
US4988184A (en) Ophthalmic disease detection apparatus
JPH08114503A (en) Colorimetry device
JPH0431054B2 (en)
JP2001231754A (en) Ophthalmometer
JP4235504B2 (en) Ophthalmic measuring device
JP4276039B2 (en) Ophthalmic measuring device
US5694198A (en) Apparatus including waveform rectifying means and method for eye examination
JP2688231B2 (en) Ophthalmic measurement device
JPH02206426A (en) Method and apparatus for analyzing surface hue of skin
JPH0716206A (en) Eye photographing device