JPS6331634A - Eye refractometer - Google Patents
Eye refractometerInfo
- Publication number
- JPS6331634A JPS6331634A JP61176171A JP17617186A JPS6331634A JP S6331634 A JPS6331634 A JP S6331634A JP 61176171 A JP61176171 A JP 61176171A JP 17617186 A JP17617186 A JP 17617186A JP S6331634 A JPS6331634 A JP S6331634A
- Authority
- JP
- Japan
- Prior art keywords
- eye
- examined
- optical system
- projection optical
- stereoscopic 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
- 230000003287 optical effect Effects 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 5
- 230000004308 accommodation Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- 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) [Abstract] 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、眼科病院等において眼の屈折値等を測定する
ために用いられ、視度誘導を良好に実施できる眼屈折計
に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ocular refractometer that is used in eye hospitals, etc. to measure the refractive value of the eye, and can perform diopter guidance well. .
［従来の技術］
従来の一般的な眼屈折計においては、被検眼を遠点や近
点等に誘導する視度誘導手段が備えられているが、この
視度誘導用の視標は平面的であるために、被検眼調節の
誘導が十分にできない場合があり、その結果として遠点
や近点での屈折測定が必ずしも正確に実行し得ないとい
う欠点がある。[Prior Art] Conventional general eye refractometers are equipped with a diopter guiding means for guiding the eye to be examined to the far point, near point, etc., but the optotype for guiding the diopter is a flat one. Therefore, it may not be possible to sufficiently guide accommodation of the subject's eye, and as a result, there is a drawback that refraction measurements at far and near points cannot necessarily be performed accurately.
［発明の目的］
本発明の目的は、このような従来の欠点を改善し、遠点
又は近点への被検眼の調節誘導を確実に行うことができ
、遠点又は近点においても正確な屈折力測定が行えるよ
うにした眼屈折計を提供することにある。[Object of the Invention] The object of the present invention is to improve such conventional drawbacks, to be able to reliably guide the subject's eye to the far point or the near point, and to be able to accurately guide the subject's eye to the far point or the near point. An object of the present invention is to provide an eye refractometer capable of measuring refractive power.
［発明の概要］
上述の目的を達成するための本発明の要旨は、被検眼が
注視するための立体視標と、該立体視標を被検眼に向け
て投影する投影光学系と、被検眼からの反射光を用いて
屈折力を測定する屈折１１１１定部とを備え、前記投影
光学系の光学部材又は立体視標を前記投影光学系の光軸
方向に移動させて被検眼の調節を誘導し、屈折力測定を
行うことを特徴とする眼屈折計である。[Summary of the Invention] The gist of the present invention for achieving the above object is to provide a stereoscopic target for the eye to be examined to gaze at, a projection optical system that projects the stereoscopic target toward the eye to be examined, and a projection optical system that projects the stereoscopic target toward the eye to be examined. a refractive index 1111 constant part that measures refractive power using reflected light from the projection optical system, and moves an optical member or a stereoscopic target of the projection optical system in the optical axis direction of the projection optical system to guide accommodation of the eye to be examined. This eye refractometer is characterized in that it measures refractive power.
［発明の実施例］ 本発明を図示の実施例に基づいて詳細に説明する。[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.
第１図は本発明に係る眼屈折計の一実施例を示すもので
あり、被検眼Ｅ側から光分割部材１、投影光学系２、立
体視標３が配置され、光分割部材ｌの反射側に屈折力測
定部４が設けられている。FIG. 1 shows an embodiment of an eye refractometer according to the present invention, in which a light splitting member 1, a projection optical system 2, and a stereoscopic target 3 are arranged from the eye E side to be examined, and the reflection of the light splitting member l is arranged. A refractive power measuring section 4 is provided on the side.
投影光学系２は被検眼Ｅを遠点や近点等に誘導するため
のものであり、立体視標３は見掛は上、数ディオプタ程
度の奥行きを有し、例えば図示のように数ｍｍの厚さを
有するガラス等の透明板５の両面に異なるパターン６ａ
、６ｂを設けたものなどを用いることができる。また、
屈折力測定部４は例えば近赤外光等を被検眼Ｅの眼底に
投影し、その反射光を光電的に処理して屈折力測定を行
う装置である。The projection optical system 2 is for guiding the subject's eye E to the far point, near point, etc., and the stereoscopic target 3 has an apparent depth of several diopters, for example, several mm as shown in the figure. Different patterns 6a are formed on both sides of a transparent plate 5 made of glass or the like having a thickness of
, 6b can be used. Also,
The refractive power measurement unit 4 is a device that projects, for example, near-infrared light or the like onto the fundus of the eye E to be examined, and processes the reflected light photoelectrically to measure refractive power.
第２図は第１図の立体視標３を光軸方向から見た状態を
示し、パターン６ａは透明板５の前面に、パターン６ｂ
は後面に設けられている。FIG. 2 shows the stereoscopic target 3 of FIG.
is located at the rear.
従来の平面的視標では、ぼけて見える位置に視標が提示
されたとき、被検眼Ｅはどの方向に調整すればよいか見
当がつかなかった。しかし１本実施例では被検眼Ｅが注
視する視標として立体的構造を有する立体視標３を用い
ているので、奥行きのあるパターンが良く見え、被検眼
Ｅの調節すべき方向が明確になる。従って、投影光学系
２を動かして立体視標３の見掛は上の位置を変えたとき
１．被検眼Ｅはその視度に追従して調節が確実にできる
。従って、遠点又は近点における屈折力測定部４により
確実に実施できる。With conventional planar optotypes, when the optotype is presented in a position where it appears blurred, the subject's eye E has no idea in which direction it should be adjusted. However, in this embodiment, since the stereoscopic optotype 3 having a three-dimensional structure is used as the optotype that the eye E to be examined looks at, a pattern with depth can be clearly seen, and the direction in which the eye E to be examined should be adjusted becomes clear. . Therefore, when the projection optical system 2 is moved to change the apparent upper position of the stereoscopic target 3, the appearance of the stereoscopic target 3 changes as follows: 1. The eye E to be examined can be reliably adjusted by following its diopter. Therefore, the measurement can be reliably performed using the refractive power measuring section 4 at the far point or the near point.
また、実施例においては投影光学系２を移動するように
説明したが、この投影光学系２を動かす代りに立体視標
３を動かすようにしてもよい。Further, in the embodiment, the projection optical system 2 is moved, but instead of moving the projection optical system 2, the stereoscopic target 3 may be moved.
なお、上述の実施例では立体視標３として透明板５の両
面に２種のパターン６ａ、６ｂを設けた場合を示したが
、その他にもホログラムのようなものを用いてもよい。In the above-described embodiment, two types of patterns 6a and 6b were provided on both sides of the transparent plate 5 as the stereoscopic target 3, but other patterns such as holograms may also be used.
［発明の効果］
以上説明したように本発明に係る眼屈折計は、光軸方向
に遠近を有する立体視標を使用しているため、被検眼を
遠点又は近点に確実に誘導することができ、遠点又は近
点における屈折力測定を正確に行うことができる。[Effects of the Invention] As explained above, since the ocular refractometer according to the present invention uses a stereoscopic target having distance in the optical axis direction, it is possible to reliably guide the eye to be examined to the far point or the near point. It is possible to accurately measure refractive power at the far point or near point.
図面は本発明に係る眼屈折計の実施例を示すものであり
、第１図はその光学的配置図、第２図は立体視標の正面
図である。
符号ｌは光分割部材、２は投影光学系、３は立体視標、
４は屈折力測定部、５は透明板、６ａ、６ｂはパターン
である。
特許出願人 キャノン株式会社
第１図
第２図The drawings show an embodiment of the ocular refractometer according to the present invention, and FIG. 1 is an optical layout thereof, and FIG. 2 is a front view of a stereoscopic target. Symbol l is a light splitting member, 2 is a projection optical system, 3 is a stereoscopic target,
4 is a refractive power measuring section, 5 is a transparent plate, and 6a and 6b are patterns. Patent applicant Canon Co., Ltd. Figure 1 Figure 2
Claims (1)
被検眼に向けて投影する投影光学系と、被検眼からの反
射光を用いて屈折力を測定する屈折測定部とを備え、前
記投影光学系の光学部材又は立体視標を前記投影光学系
の光軸方向に移動させて被検眼の調節を誘導し、屈折力
測定を行うことを特徴とする眼屈折計。 ２、前記立体視標は両面に異なるパターンを有し、厚み
を持つ透明板とした特許請求の範囲第１項に記載の眼屈
折計。[Claims] 1. Measuring refractive power using a stereoscopic target for the eye to be examined to gaze at, a projection optical system that projects the stereoscopic target towards the eye to be examined, and light reflected from the eye to be examined. and a refraction measurement unit, which moves an optical member or a stereoscopic target of the projection optical system in the optical axis direction of the projection optical system to guide accommodation of the eye to be examined, and performs refractive power measurement. Ocular refractometer. 2. The ocular refractometer according to claim 1, wherein the stereoscopic target has different patterns on both sides and is a thick transparent plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61176171A JPS6331634A (en) | 1986-07-26 | 1986-07-26 | Eye refractometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61176171A JPS6331634A (en) | 1986-07-26 | 1986-07-26 | Eye refractometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6331634A true JPS6331634A (en) | 1988-02-10 |
| JPH0576292B2 JPH0576292B2 (en) | 1993-10-22 |
Family
ID=16008903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61176171A Granted JPS6331634A (en) | 1986-07-26 | 1986-07-26 | Eye refractometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6331634A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05176889A (en) * | 1991-10-31 | 1993-07-20 | Nidek Co Ltd | Eyesight tester |
| JPH07293035A (en) * | 1994-04-19 | 1995-11-07 | Kawasaki Heavy Ind Ltd | Method for constructing aboveground flat bottom cylindrical storage tank |
| JPH105176A (en) * | 1996-06-20 | 1998-01-13 | Topcon Corp | Optotypes presenting device and target plate for stereoscopic vision |
| JP2018042755A (en) * | 2016-09-14 | 2018-03-22 | 株式会社トプコン | Three-dimensional image presentation apparatus and ophthalmic apparatus |
-
1986
- 1986-07-26 JP JP61176171A patent/JPS6331634A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05176889A (en) * | 1991-10-31 | 1993-07-20 | Nidek Co Ltd | Eyesight tester |
| JPH07293035A (en) * | 1994-04-19 | 1995-11-07 | Kawasaki Heavy Ind Ltd | Method for constructing aboveground flat bottom cylindrical storage tank |
| JPH105176A (en) * | 1996-06-20 | 1998-01-13 | Topcon Corp | Optotypes presenting device and target plate for stereoscopic vision |
| JP2018042755A (en) * | 2016-09-14 | 2018-03-22 | 株式会社トプコン | Three-dimensional image presentation apparatus and ophthalmic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0576292B2 (en) | 1993-10-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |