JP3414792B2 - Eye refractive power measuring device - Google Patents

Eye refractive power measuring device

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Publication number
JP3414792B2
JP3414792B2 JP14866093A JP14866093A JP3414792B2 JP 3414792 B2 JP3414792 B2 JP 3414792B2 JP 14866093 A JP14866093 A JP 14866093A JP 14866093 A JP14866093 A JP 14866093A JP 3414792 B2 JP3414792 B2 JP 3414792B2
Authority
JP
Japan
Prior art keywords
light
eye
refractive power
measurement
inspected
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.)
Expired - Fee Related
Application number
JP14866093A
Other languages
Japanese (ja)
Other versions
JPH06335455A (en
Inventor
浩久 中尾
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.)
Topcon Corp
Original Assignee
Topcon Corp
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 Topcon Corp filed Critical Topcon Corp
Priority to JP14866093A priority Critical patent/JP3414792B2/en
Publication of JPH06335455A publication Critical patent/JPH06335455A/en
Application granted granted Critical
Publication of JP3414792B2 publication Critical patent/JP3414792B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

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

【0001】[0001]

【産業上の利用分野】本発明は眼屈折力測定装置、特に
眼位異常も同時に測定可能とした眼屈折力測定装置に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eye-refractive-power measuring device, and more particularly to an eye-refractive-power measuring device capable of simultaneously measuring eye position abnormalities.

【0002】[0002]

【従来の技術】本出願人は特願平1−86107号(特
開平2−264631号)に於いて、眼屈折力と眼位異
常を同時に測定できる眼屈折力測定装置を提案した。
2. Description of the Related Art The applicant of the present invention has proposed, in Japanese Patent Application No. 1-86107 (JP-A-2-264631), an eye-refractive-power measuring device capable of simultaneously measuring the eye-refractive power and the abnormal eye position.

【0003】この眼屈折力測定装置は被検眼眼底に光束
を投影し、眼底からの反射光束の一部を遮光することに
よって得られる瞳像の光量分布の勾配より眼屈折力を測
定し、又前記光量分布の形状から、即ち虹彩と瞳孔の境
界で急激な光量変化があることを利用して被検眼の瞳径
を求めると共に、光量分布測定時に角膜反射の輝点像が
得られることを利用し、この輝点と前記瞳径の相対位置
の関係で眼位異常、視線方向の測定を可能としたもので
ある。
This eye refractive power measuring device measures the eye refractive power from the gradient of the light amount distribution of the pupil image obtained by projecting a light beam on the fundus of the eye to be examined and blocking a part of the light beam reflected from the fundus. From the shape of the light intensity distribution, that is, the pupil diameter of the subject's eye is obtained by utilizing the fact that there is a rapid light intensity change at the boundary between the iris and the pupil, and the fact that a bright spot image of corneal reflection is obtained when measuring the light intensity distribution is used. However, the relationship between this bright point and the relative position of the pupil diameter makes it possible to measure the eye position abnormality and the line-of-sight direction.

【0004】[0004]

【発明が解決しようとする課題】然し乍ら、上記した眼
屈折力測定装置で得られる被検眼の光量分布では、眼屈
折力によっては前述の様に傾きを持つ為、虹彩と瞳孔の
境界を知るのが難しいという問題がある。この境界が正
確に求められないと図4で示す様に、真の瞳孔径dに対
して測定された瞳孔径d′との相違の為、瞳孔径と輝点
の相対位置が相違し、正確な視線方向を測定することが
できない。更に眼屈折力測定の為には発光光源はある程
度の長さを持つ面発光光源でなくてはならず、図5に示
される様に前記輝点像も又ある程度の面積を持ち、一点
を示すものではない(図5は光源が縦長の光源であった
場合の輝点像19である)。従って、正確な眼位異常、
視線方向の測定が難しい場合があるという問題があっ
た。
However, in the light amount distribution of the eye to be inspected obtained by the above-mentioned eye refractive power measuring device, there is an inclination as described above depending on the eye refractive power, so that the boundary between the iris and the pupil can be known. There is a problem that it is difficult. If this boundary cannot be accurately obtained, as shown in FIG. 4, the relative position between the pupil diameter and the bright spot is different due to the difference between the true pupil diameter d and the measured pupil diameter d ′. It is not possible to measure the line-of-sight direction. Furthermore, in order to measure the eye refractive power, the light emitting light source must be a surface emitting light source having a certain length, and as shown in FIG. 5, the bright spot image also has a certain area and shows one point. However, FIG. 5 shows a bright spot image 19 when the light source is a vertically long light source. Therefore, accurate eye position abnormality,
There is a problem that it may be difficult to measure the gaze direction.

【0005】本発明は斯かる実情に鑑み、正確に眼位異
常、視線方向の測定が行える様にしたものである。
In view of the above-mentioned circumstances, the present invention has made it possible to accurately measure the eye position abnormality and the line-of-sight direction.

【0006】[0006]

【課題を解決するための手段】本発明は、測定光源と、
被検眼眼底に測定光源像を投影する為の投影系と、被検
眼眼底からの反射光束を被検眼瞳と略共役位置に配置し
た受光素子上に導く為の受光系と、該受光系に配置され
た反射光束の一部を遮光するエッジ状の遮光部材とを有
し、前記受光素子上に形成された被検眼瞳像より被検眼
の眼屈折力、被検眼の瞳孔径或は角膜反射輝点像位置を
測定する眼屈折力測定装置に於いて、前記測定光源の発
光面積を可変とし、眼屈折力測定を除く測定では発光面
積を減少させる眼屈折力測定装置に係り、又前記測定光
源が複数の発光部を有し、眼屈折力測定時、瞳孔径測定
時に前記複数の発光部のうち適宜箇所を選択して点灯す
る眼屈折力測定装置に係り、更に又少なくとも1つの発
光部は前記被検眼眼底からの反射光束が前記遮光部材に
一部が遮光され、他の少なくとも1つの発光部は前記被
検眼眼底からの反射光束が前記遮光部材に遮光されない
か遮光の影響を受けない眼屈折力測定装置に係るもので
ある。
SUMMARY OF THE INVENTION The present invention comprises a measurement light source,
A projection system for projecting a measurement light source image onto the fundus of the eye to be inspected, a light receiving system for guiding the reflected light flux from the fundus of the eye to be detected onto a light receiving element arranged at a position substantially conjugate with the pupil of the eye to be inspected, and arranged in the light receiving system An edge-shaped light-shielding member that shields a part of the reflected light flux, and the eye refractive power of the eye to be inspected, the pupil diameter of the eye to be inspected, or the corneal reflection intensity from the pupil image of the eye to be inspected formed on the light receiving element. in the eye refractive power measurement apparatus for measuring the point image position, wherein the light-emitting area of the measurement light source is variable, it is measured, excluding the eye refractive power measurement relates to eye refractive power measurement apparatus for reducing the light emitting area, and before Symbol measured The present invention relates to an eye refractive power measuring device which has a plurality of light emitting parts, and which is turned on by selecting an appropriate part among the plurality of light emitting parts during eye refractive power measurement and pupil diameter measurement, and at least one light emitting part. Part of the light flux reflected from the fundus of the eye to be examined is blocked by the light blocking member, At least one light-emitting portion of which relates to eye refractive power measurement apparatus reflected light beam is not affected by shading or not blocked on the light blocking member from the fundus.

【0007】[0007]

【作用】眼屈折力測定時には、測定光源を所要の発光面
積で発光させ、眼屈折力測定に必要な光量分布を得、角
膜反射輝点像位置を測定する場合は発光面積を減少させ
て角膜反射輝点像の面積を小さくして輝点位置の測定精
度を上げる。或は、複数ある発光部を選択して点灯し、
受光素子で得られた光量分布が被検眼の眼屈折力に影響
を受けない状態として瞳孔測定を行う。
[Function] When measuring the eye refractive power, the measurement light source is caused to emit light in a required light emitting area to obtain a light amount distribution necessary for the eye refractive power measurement. When measuring the corneal reflection bright spot image position, the light emitting area is reduced to reduce the cornea. The area of the reflected bright spot image is reduced to improve the measurement accuracy of the bright spot position. Or, select a plurality of light emitting parts to light up,
The pupil measurement is performed under the condition that the light amount distribution obtained by the light receiving element is not affected by the eye refractive power of the subject's eye.

【0008】[0008]

【実施例】以下、図面を参照しつつ本発明の一実施例を
説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0009】1は測定光源像を被検眼3の眼底7に投影
する為の投影系であり、2は眼底7により反射された光
束10を受光する為の受光系であり、投影系1及び受光
系2は被検眼3に対向して配置される。
Reference numeral 1 is a projection system for projecting a measurement light source image onto the fundus 7 of the eye 3 to be inspected, and 2 is a light receiving system for receiving the light beam 10 reflected by the fundus 7, the projection system 1 and the light receiving system. The system 2 is arranged to face the eye 3 to be inspected.

【0010】前記投影系1は、投影系の光軸に直交する
面内の、直交する2経線上に位置する4つのスリット状
発光部4a,4b,4c,4d及び2経線の交点状に位
置する点状光源4eを有する測定光源部4と、該スリッ
ト状発光部4a,4b,4c,4d及び点状光源4eか
らの光束11を前記被検眼3に向けて反射させる為のハ
ーフミラー5とから成り、該投影系1はスリット状発光
部4a,4b,4c,4d及び点状光源4eをからの光
束11を瞳孔6を通して眼底7上にスリット状発光部4
a,4b,4c,4d及び点状光源4eの像を形成する
様に投影する。
The projection system 1 is positioned at an intersection of four slit-shaped light emitting portions 4a, 4b, 4c, 4d and two meridians located on two orthogonal meridians in a plane orthogonal to the optical axis of the projection system. A measuring light source unit 4 having a point light source 4e, and a half mirror 5 for reflecting the light beam 11 from the slit light emitting units 4a, 4b, 4c, 4d and the point light source 4e toward the eye 3 to be examined. The projection system 1 comprises a slit-shaped light-emitting portion 4a, 4b, 4c, 4d and a luminous flux 11 emitted from a point-shaped light source 4e through a pupil 6 and a fundus 7 on the fundus 7.
The images a, 4b, 4c and 4d and the point light source 4e are projected so as to form images.

【0011】次に、前記測定光源部4を図2、図3に於
いて説明する。
Next, the measurement light source unit 4 will be described with reference to FIGS.

【0012】該測定光源部4は、後述する遮光部材12
のエッヂ部12a,12b,12c,12dと直交する
スリット孔20a,20b,20c,20d及び該スリ
ット孔の中心線の交点に透過孔20eが穿設されたター
ゲット板16と、前記スリット孔20a,20b,20
c,20dに対応し、LED等赤外光を発する発光体が
直線状に配設され構成されたスリット状発光部4a,4
b,4c,4dと、前記透過孔20eに対応する点状発
光源4eとを有している。
The measuring light source unit 4 includes a light shielding member 12 which will be described later.
The slit portions 20a, 20b, 20c, 20d orthogonal to the edge portions 12a, 12b, 12c, 12d, and the target plate 16 in which the transmission holes 20e are formed at the intersections of the center lines of the slit holes, and the slit holes 20a, 20b, 20
Corresponding to c and 20d, slit-shaped light emitting portions 4a and 4 are formed by linearly arranging light emitting bodies such as LEDs that emit infrared light.
b, 4c, 4d and a point emission source 4e corresponding to the transmission hole 20e.

【0013】又、前記ターゲット板16には、前記スリ
ット孔20a,20b,20c,20dが配置された経
線とは別の経線(本実施例ではスリット孔の経線に対し
て45゜をなす別の経線)上に、可視光を発するLED
等発光体17をそれぞれ所要のピッチで所要数設ける。
この発光体17で形成される図柄は固視目標となるもの
であり、該発光体17を周辺より中心に向って順次点滅
できる様にしておく。
Further, the target plate 16 has a meridian different from the meridian in which the slit holes 20a, 20b, 20c and 20d are arranged (in this embodiment, another meridian forming an angle of 45 ° with the meridian of the slit holes). LED that emits visible light on the meridian)
A required number of equal light emitting bodies 17 are provided at a required pitch.
The pattern formed by the light-emitting body 17 is a fixation target, and the light-emitting body 17 is designed to be capable of blinking sequentially from the periphery toward the center.

【0014】前記受光系2は、対物レンズ8及び受光素
子9から成り、眼底7からの光束10はハーフミラー5
を透過して受光素子9上に導かれる。該受光素子9は、
エリアCCD、撮像管或は2以上の受光素子の集合体で
あり、受光素子9の受光面9aは対物レンズ8に関して
被検眼3の瞳孔6と共役位置に配置される。
The light receiving system 2 comprises an objective lens 8 and a light receiving element 9, and a light beam 10 from the fundus 7 is reflected by the half mirror 5.
Is guided through the light receiving element 9. The light receiving element 9 is
It is an area CCD, an image pickup tube or an assembly of two or more light receiving elements, and the light receiving surface 9a of the light receiving element 9 is arranged at a conjugate position with the pupil 6 of the eye 3 to be inspected with respect to the objective lens 8.

【0015】前記受光系2の光路内には、被検眼3の眼
屈折力が基準ディオプター値の場合に、前記発光部像が
形成される位置に、前記各スリット状発光部4a,4
b,4c,4dからの光束それぞれの片側を遮光する為
のエッヂ部12a,12b,12c,12dを有する遮
光部材12を、光軸と垂直な平面内に配置する。
In the optical path of the light receiving system 2, when the eye refractive power of the eye 3 to be inspected has a reference diopter value, the slit-shaped light emitting portions 4a, 4 are formed at the positions where the light emitting portion images are formed.
A light blocking member 12 having edge portions 12a, 12b, 12c, 12d for blocking one side of each of the light beams from b, 4c, 4d is arranged in a plane perpendicular to the optical axis.

【0016】該遮光部材12には正方形の孔18が穿設
され、該孔18の4辺が前記スリット状発光部4a,4
b,4c,4dの像と直交するエッヂ部12a,12
b,12c,12dとなっている。
A square hole 18 is formed in the light shielding member 12, and the four sides of the hole 18 are the slit-shaped light emitting portions 4a, 4a.
edge portions 12a, 12 orthogonal to the images b, 4c, 4d
b, 12c, 12d.

【0017】前記受光素子9には演算器13が接続さ
れ、該演算器13は受光素子9の受光状態を各径線での
データをメモリーし、更に演算し、その結果を表示器1
4に出力する様になっている。又、前記スリット状発光
部4a,4b,4c,4d及び点状光源4e、前記発光
体17を駆動するドライバ15が前記演算器13に接続
され、該演算器13は前記スリット状発光部4a,4
b,4c,4d及び点状光源4eの点灯状態を前記ドラ
イバ15を介して制御する様になっている。
An arithmetic unit 13 is connected to the light receiving element 9, and the arithmetic unit 13 stores the data of the light receiving state of the light receiving element 9 in each radial line and further calculates the result, and the result is displayed on the display unit 1.
It is designed to output to 4. Further, the slit-shaped light emitting units 4a, 4b, 4c, 4d, the point light source 4e, and the driver 15 for driving the light emitter 17 are connected to the arithmetic unit 13, and the arithmetic unit 13 connects the slit-shaped light emitting unit 4a, Four
The lighting states of b, 4c, 4d and the point light source 4e are controlled via the driver 15.

【0018】以下、作用を説明する。The operation will be described below.

【0019】先ず、測定を開始するにあたり、装置と被
検者、特に被検眼とのアライメントをするが、前記ター
ゲット板16は固視目標となるものであり、前記発光体
17を中心に向って順次点滅することで、被検者はこの
動きにより自然に中心を視準し、被検眼の視線を測定装
置の光軸に固定することができる。又、発光体17の点
滅に合せて音を出す様にすれば、尚効果的である。
First, when the measurement is started, the device and the subject, especially the eye to be inspected, are aligned. The target plate 16 is a fixation target, and the illuminant 17 is the center. By sequentially blinking, the subject naturally collimates the center by this movement, and the line of sight of the subject's eye can be fixed to the optical axis of the measuring device. Further, it is still more effective if the sound is emitted in accordance with the blinking of the light emitting body 17.

【0020】アライメントが完了すると、先ず眼屈折力
について測定する。
When the alignment is completed, first the eye refractive power is measured.

【0021】前記演算器13からの信号で、前記ドライ
バ15を介して前記スリット状発光部4a,4b,4
c,4dの1つを選択して点灯する。選択されたスリッ
ト状発光部の属する経線に関して光量分布、眼屈折力を
求める。
A signal from the computing unit 13 is used to output the slit-shaped light emitting portions 4a, 4b, 4 via the driver 15.
One of c and 4d is selected and turned on. The light amount distribution and the eye refractive power are obtained for the meridian to which the selected slit-shaped light emitting unit belongs.

【0022】図1で示されるものは、被検眼3が基準デ
ィオプター値を有している状態を示すが、この状態では
反射光束10は遮光部材12の前記選択された発光部と
対応するエッヂ部上で集光する。この状態で遮光部材1
2が反射光束10の一部を遮ぎると受光面9aに投影さ
れる光束の光量分布は均一になる。
FIG. 1 shows a state in which the eye 3 to be inspected has a reference diopter value. In this state, the reflected light beam 10 has an edge portion corresponding to the selected light emitting portion of the light shielding member 12. Focus on the top. In this state, the light blocking member 1
When 2 blocks a part of the reflected light beam 10, the light amount distribution of the light beam projected on the light receiving surface 9a becomes uniform.

【0023】次に、基準ディオプター値より大きいか又
は小さいディオプター値を有する被検眼では、そのディ
オプター値の大きさにより、反射光束10の集光位置が
遮光部材12のエッヂ部より、被検眼3側、或は対物レ
ンズ8側へ偏る。この偏りによって、遮光部材12によ
る反射光束10の遮光状態が変化し、受光面9aに投影
される光束の光量分布は均一でなくなり傾斜を有する様
になる。更にこの傾斜は、眼屈折力に対応する。
Next, in the eye to be inspected having a diopter value larger or smaller than the reference diopter value, the condensing position of the reflected light beam 10 is closer to the eye 3 side than the edge portion of the light shielding member 12 depending on the size of the diopter value. Or, it is biased toward the objective lens 8 side. Due to this bias, the light blocking state of the reflected light beam 10 by the light blocking member 12 changes, and the light amount distribution of the light beam projected on the light receiving surface 9a becomes uneven and has an inclination. Furthermore, this tilt corresponds to the eye power.

【0024】演算器13が受光素子9の1画面分の受光
信号を取込み、光量分布状態、更に眼屈折力を演算す
る。
The calculator 13 takes in a light-receiving signal for one screen of the light-receiving element 9 and calculates the light amount distribution state and the eye refractive power.

【0025】この眼屈折力の測定を、他の発光部に関し
ても行い、複数の経線について眼屈折力を求める。更
に、複数経線の眼屈折力から乱視軸角度、乱視度も演算
によって求めることができる。これら、演算結果は、測
定結果として表示器14に表示される。
This measurement of the eye refractive power is also performed for other light emitting parts, and the eye refractive power is obtained for a plurality of meridians. Furthermore, the astigmatic axis angle and the degree of astigmatism can also be calculated from the eye refractive power of a plurality of meridians. These calculation results are displayed on the display 14 as measurement results.

【0026】又、同一経線上、例えばスリット状発光部
4a、スリット状発光部4bについてそれぞれ眼屈折力
を測定し、平均化すれば測定精度が向上する。
Further, if the eye refractive powers of the slit-shaped light emitting portion 4a and the slit-shaped light emitting portion 4b are measured on the same meridian and averaged, the measurement accuracy is improved.

【0027】視線方向測定、瞳孔径測定時には、前記演
算器13より前記ドライバ15を介して点状光源4eの
みを点灯する。
At the time of measuring the line-of-sight direction and the pupil diameter, only the point light source 4e is turned on by the calculator 13 via the driver 15.

【0028】この点状光源4eの前記眼底7からの反射
光束10は、前記エッヂ部12a,12b,12c,1
2dの影響は殆ど受けないか、或は受けたとしても該エ
ッヂ部12a,12b,12c,12dの影響を均等に
受けるので、前記受光面9aに投影される光束の光量分
布は眼屈折力の如何に拘らず均一となる。従って、前記
点状光源4eの点灯によって得られる光量分布より瞳孔
径を求めると、高精度の瞳孔径測定ができ、その結果瞳
像の位置が正確に得られる。
The reflected light beam 10 from the fundus 7 of the point light source 4e is the edge portions 12a, 12b, 12c, 1 of the edges.
2d is hardly affected, or even if it is, the edge portions 12a, 12b, 12c, 12d are evenly affected, so that the light quantity distribution of the light beam projected on the light receiving surface 9a is equal to the eye refractive power. It becomes uniform regardless of how it is done. Therefore, if the pupil diameter is obtained from the light amount distribution obtained by turning on the point light source 4e, the pupil diameter can be measured with high accuracy, and as a result, the position of the pupil image can be accurately obtained.

【0029】次に、前記光量分布により或は受光面9a
の瞳像そのものから角膜反射による輝点の位置を測定す
るが、角膜反射像も前記点状光源4eが点光源に近いの
で(被検眼3からの光源の視角が狭いので)、非常にシ
ャープな点に近いものとなり、輝点位置の検出精度は正
確である。
Next, depending on the light quantity distribution or the light receiving surface 9a
The position of the bright spot due to corneal reflection is measured from the pupil image itself, but the corneal reflection image is also very sharp because the point light source 4e is close to the point light source (since the viewing angle of the light source from the subject's eye 3 is narrow). It becomes close to a point, and the detection accuracy of the bright spot position is accurate.

【0030】而して、瞳像の位置、輝点位置が正確に検
知し得、正確な視線方向の測定が行え、更に眼位異常の
測定が正確に行える。
Thus, the position of the pupil image and the position of the bright spot can be detected accurately, and the measurement of the line-of-sight direction can be performed accurately, and the abnormal eye position can be also accurately measured.

【0031】尚、眼屈折力測定時に前記輝点位置の測定
が充分に可能であれば、前記点状光源4eを省略するこ
とも可能であり、この場合前記スリット状発光部4a,
4b,4c,4dを点灯させ前記エッヂ部12a,12
b,12c,12dの影響を打ち消す様にし、瞳像位置
の測定を行ってもよい。
If the position of the bright spot can be measured sufficiently at the time of measuring the eye refractive power, the point light source 4e can be omitted. In this case, the slit light emitting section 4a,
4b, 4c, 4d are turned on and the edge portions 12a, 12
The pupil image position may be measured while canceling out the effects of b, 12c, and 12d.

【0032】又、測定光源、エッヂ部は4経線方向とし
たが、6経線方向であっても、或は1経線方向であって
もよい。
Further, although the measuring light source and the edge portion are arranged in the 4-meridian direction, they may be in the 6-meridian direction or the 1-meridian direction.

【0033】更に又、上記実施例で輝点位置測定の精度
を上げる場合に、点状光源4eに切替えたが、発光部が
LED等点光源の集合である場合は、発光部を構成する
LEDの一部のみを点灯可能とし、発光部自体の発光面
積を変化させ点光源に近付けてもよい。この場合、前記
点状光源4eは省略することができる。
Further, in order to improve the accuracy of the bright spot position measurement in the above-mentioned embodiment, the point light source 4e was switched, but when the light emitting portion is a set of point light sources such as LEDs, the LEDs constituting the light emitting portion are formed. It is also possible to turn on only a part of the light source and change the light emitting area of the light emitting unit itself to bring it closer to the point source. In this case, the point light source 4e can be omitted.

【0034】[0034]

【発明の効果】以上述べた如く本発明によれば、眼屈折
力の測定を行うと共に視線方向、瞳孔径の測定が精度よ
く行え、正確な眼位測定を合わせて行うことができると
いう優れた効果を発揮する。
As described above, according to the present invention, the eye refractive power can be measured, the eye direction and the pupil diameter can be accurately measured, and accurate eye position measurement can be performed together. Be effective.

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

【図1】本発明の一実施例を示す基本構成図である。FIG. 1 is a basic configuration diagram showing an embodiment of the present invention.

【図2】図1のA−A矢視図である。FIG. 2 is a view on arrow AA of FIG.

【図3】図1のB−B矢視図である。FIG. 3 is a view taken along the line BB of FIG.

【図4】瞳孔径測定の説明図である。FIG. 4 is an explanatory diagram of pupil diameter measurement.

【図5】角膜反射像測定の説明図である。FIG. 5 is an explanatory diagram of a corneal reflection image measurement.

【符号の説明】[Explanation of symbols]

1 投影系 2 受光系 3 被検眼 4 測定光源部 4a スリット状発光部 4b スリット状発光部 4c スリット状発光部 4d スリット状発光部 4e 点状光源 7 眼底 9 受光素子 12 遮光部材 13 演算器 14 表示器 15 ドライバ 1 Projection system 2 Light receiving system 3 eye 4 Measuring light source 4a Slit-shaped light emitting unit 4b Slit-shaped light emitting unit 4c Slit-shaped light emitting part 4d slit-shaped light emitting unit 4e point light source 7 fundus 9 Light receiving element 12 Light-shielding member 13 arithmetic unit 14 Display 15 driver

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 測定光源と、被検眼眼底に測定光源像を
投影する為の投影系と、被検眼眼底からの反射光束を被
検眼瞳と略共役位置に配置した受光素子上に導く為の受
光系と、該受光系に配置された反射光束の一部を遮光す
るエッジ状の遮光部材とを有し、前記受光素子上に形成
された被検眼瞳像より被検眼の眼屈折力、被検眼の瞳孔
径或は角膜反射輝点像位置を測定する眼屈折力測定装置
に於いて、前記測定光源の発光面積を可変とし、眼屈折
力測定を除く測定では発光面積を減少させる様構成した
ことを特徴とする眼屈折力測定装置。
1. A measurement light source, a projection system for projecting a measurement light source image on the fundus of the eye to be inspected, and a light flux reflected from the fundus of the eye to be inspected on a light receiving element arranged substantially conjugate with the pupil of the eye to be inspected. A light-receiving system and an edge-shaped light-shielding member that blocks a part of the reflected light beam disposed in the light-receiving system, and the eye refractive power of the eye to be inspected from the eye image of the eye to be inspected formed on the light receiving element. In an eye-refractive-power measuring device for measuring the pupil diameter or the corneal reflex bright spot image position of the optometry, the light-emitting area of the measurement light source is variable, and the light-emitting area is reduced in the measurement except the eye-refractive-power measurement. An eye refractive power measuring device characterized by the above.
【請求項2】記測定光源が複数の発光部を有し、眼
屈折力測定時、瞳孔径測定時に前記複数の発光部のうち
適宜箇所を選択して点灯する様構成した請求項1の眼屈
折力測定装置。
2. A pre-Symbol measurement light source has a plurality of light emitting portions, when the eye refractive power measurement, the pupil diameter measuring scheduled to claim 1 configured such that lights by selecting the appropriate position among the plurality of light emitting portions Eye refractive power measuring device.
【請求項3】 少なくとも1つの発光部は前記被検眼眼
底からの反射光束が前記遮光部材に一部が遮光され、他
の少なくとも1つの発光部は前記被検眼眼底からの反射
光束が前記遮光部材に遮光されないか遮光の影響を受け
ないものである請求項2の眼屈折力測定装置。
3. At least one light emitting portion is partially shielded by the light shielding member from a light beam reflected from the fundus of the eye to be examined, and at least another light emitting portion is shielded from light shielding member from the light beam reflected from the fundus of the eye to be examined. The eye refractive power measuring device according to claim 2, which is not shielded from light or is not affected by light shielding.
JP14866093A 1993-05-27 1993-05-27 Eye refractive power measuring device Expired - Fee Related JP3414792B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14866093A JP3414792B2 (en) 1993-05-27 1993-05-27 Eye refractive power measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14866093A JP3414792B2 (en) 1993-05-27 1993-05-27 Eye refractive power measuring device

Publications (2)

Publication Number Publication Date
JPH06335455A JPH06335455A (en) 1994-12-06
JP3414792B2 true JP3414792B2 (en) 2003-06-09

Family

ID=15457780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14866093A Expired - Fee Related JP3414792B2 (en) 1993-05-27 1993-05-27 Eye refractive power measuring device

Country Status (1)

Country Link
JP (1) JP3414792B2 (en)

Also Published As

Publication number Publication date
JPH06335455A (en) 1994-12-06

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