JPH05220113A - Eye refracting power measuring instrument - Google Patents

Eye refracting power measuring instrument

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Publication number
JPH05220113A
JPH05220113A JP4061084A JP6108492A JPH05220113A JP H05220113 A JPH05220113 A JP H05220113A JP 4061084 A JP4061084 A JP 4061084A JP 6108492 A JP6108492 A JP 6108492A JP H05220113 A JPH05220113 A JP H05220113A
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JP
Japan
Prior art keywords
eye
light
system
eyes
refractive power
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Pending
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JP4061084A
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Japanese (ja)
Inventor
Takeshi Hayashi
健史 林
Original Assignee
Topcon Corp
株式会社トプコン
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Application filed by Topcon Corp, 株式会社トプコン filed Critical Topcon Corp
Priority to JP4061084A priority Critical patent/JPH05220113A/en
Publication of JPH05220113A publication Critical patent/JPH05220113A/en
Application status is Pending legal-status Critical

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Abstract

PURPOSE: To facilitate alignment by providing a mobile mirror at the common optical path part of a projection system, photodetection system and fixed index system and moving the mobile mirror corresponding to the positions of eyes to be inspected.
CONSTITUTION: After alignment is executed at the degree of projecting both of the eyes to be inspected on a monitor screen, an inspector moves a mobile mirror 8 by operating an attached switch, and both pupiles 10 of the eyes to be inspected are set in alignment areas and focused. At such a time, since it is enough for the optical axis of the device and the optical axes of eyes 4L and 4R to set the pupiles 10 in the alignment areas according to the principle of photorefraction, it is not necessary to make those optical axes coincident. Next, pre-measurement is executed in this state. Since the rough refracting force of the eyes to be inspected is discriminated by this pre-measurement, the proper positions of a light source 6, light shielding member 17 and fixed index 18 for calculated exact refracting force from the result of the pre- measurement are calculated, and those equipments are integrally moved to the calculated positions. Then, main measurement is executed, and the refracting power of the eyes to be inspected is calculated.
COPYRIGHT: (C)1993,JPO&Japio

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、特に固視標を簡略化したフォトレフラクション方式の眼屈折力測定装置に関するものである。 The present invention relates to relates to eye refractive power measurement apparatus of the photo-les fractions scheme eye refractive power measuring apparatus, and in particular simplified fixation target.

【0002】 [0002]

【従来の技術】眼屈折力を測定する場合に、被検眼の視線を測定光学系の光軸に合致、固定させる必要があり、 When measuring BACKGROUND ART eye refractive power, conform to the optical axis of the measuring optical system the line of sight of the eye, must be fixed,
又被検眼の調整機能が作用していない状態で測定する必要があり、この為眼屈折力測定装置には被検眼を固視、 Also must be measured in a state where adjustment function of the eye is not acting, fixing an eye to this Tameme refractive power measurement apparatus,
雲霧させる固視標が設けられる。 Fixation target to fogging is provided.

【0003】又、被検眼を雲霧視状態とするには、被検眼の屈折力に応じて、被検眼から固視標迄の光学的距離を調整しなければならない。 [0003] Also, the fogging vision state the eye, depending on the refractive power of the eye must be adjusted to the optical distance to the fixation target from the eye.

【0004】従来、被検眼の視線を測定光学系の光軸に位置合せするには、被検者に協力してもらい、被検者自身で位置合せしてもらうか、或は測定装置全体を移動させて調整をし、又被検眼を雲霧視状態とするには、測定装置全体を移動させて被検眼と固視標との光学的距離を調整していた。 Conventionally, to align the optical axis of the measuring optical system the line of sight of the eye is asked to cooperate with the subject, or have them aligned with the subject itself, or the entire measuring device the moved by an adjustment, also in the fogging vision state the eye had to adjust the optical distance between the eye and the fixation target by moving the entire measuring device.

【0005】 [0005]

【発明が解決しようとする課題】上記した様に、従来の眼屈折力測定装置では、被検眼を固視、雲霧させる為のアライメント作業を被検者側で協力してもらい、或は測定装置全体を移動させているので、アライメント作業は繁雑であった。 As has been described above [0005], in the conventional eye refractive power measuring device, ask to cooperate fixing an eye, the alignment work of the order to cloud in the examiner's side, or the measurement device since the move the whole, alignment work was complicated.

【0006】本発明は斯かる実情に鑑み、アライメント作業を著しく簡単にしようとするものである。 [0006] The present invention has been made in consideration of the such circumstances, it is intended to greatly simplifies the alignment operation.

【0007】 [0007]

【課題を解決するための手段】本発明は、被検眼眼底に光源像を投影する為の投影系と、該被検眼眼底からの反射光束を受光素子に導く為の受光系と、該受光系の光路内に配置され受光光束の一部を遮光する為の遮光部材と、固視標系とを有し、該受光素子上に形成された光量分布により被検眼の眼屈折力を測定する眼屈折力測定装置に於いて、前記投影系、受光系、固視標系の共通光路部分に移動ミラーを設け、被検眼位置に合せて前記移動ミラーを移動可能としたことを特徴とするものであり、 SUMMARY OF THE INVENTION The present invention provides a projection system for projecting the light source image on the fundus of the eye, a light receiving system for guiding the reflected light beam from 該被 fundus to the light receiving element, the light receiving system eye to the measurement and the light shielding member for being disposed in the optical path for shielding a portion of the received light flux, and a fixation target system, the eye refractive power of the eye by forming light amount distribution on the light receiving element in refractive power measurement apparatus, the projection system, the light receiving system, a common optical path portion of the fixation target system to provide a moving mirror, characterized in that it has movable the moving mirror in accordance with the subject's eye position Yes,
又少なくとも投影系の光源と受光系の受光素子と、固視標系の固視標とを共役位置を保持して移動可能としたことを特徴とするものである。 The at least a projection system of a light source and the light receiving element of the light receiving system, is characterized in that the fixation target fixation target system was capable of holding and moving the conjugate position.

【0008】 [0008]

【作用】前測定前の大体のアライメントは、移動ミラーの移動によって行い、本測定前のアライメントは光源、 Approximate alignment before the [action] before the measurement is carried out by the movement of the moving mirror, this measurement prior to the alignment light source,
遮光部材、固視標を同時に移動して行う。 Performing shading member, by moving the fixation target at the same time.

【0009】 [0009]

【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。 EXAMPLES Hereinafter, a description will be given of an embodiment of the present invention with reference to the drawings.

【0010】本出願人は先の出願、特願平1−2449 [0010] The present applicant has previously filed application, Japanese Patent Application No. 1-2449
1号に於いて、被検眼眼底に光源像を投影し、眼底で反射される光源からの光束を、エッヂ状の遮光部材で遮り、遮った光束を受光素子で受け、その光束の光量分布状態を基に眼屈折力を測定し、如何なるディオプター値でも測定を可能とした眼屈折力測定装置を提案した。 In No. 1, by projecting a light source image on the fundus, a light beam from a light source is reflected by the fundus, intercepts at edge-shaped light shielding member receives the light beam blocked by the light receiving element, the light amount distribution of the light beam the eye refractive power is measured based on proposed possible and the eye refractive power measuring device measuring in any diopter value. 以下に述べる実施例は、斯かる眼屈折力測定装置に実施したものである。 Embodiments described below are those conducted in such eye refractive power measurement apparatus.

【0011】図1は左被検眼4L 、右被検眼4R の眼屈折力を同時に測定できる構成を有する眼屈折力測定装置を示している。 [0011] Figure 1 shows the eye refractive power measuring apparatus having a configuration capable of measuring the left eye to be examined 4L, the eye refractive power of the right eye to be examined 4R simultaneously. 該眼屈折力測定装置に於いて、左被検眼4Lを測定する左測定光学系30L と右被検眼4R を測定する右測定光学系30R とは同一構成であるので、以下は左測定光学系30L について説明する。 In the eye refractive power measurement apparatus, since the right measurement optical system 30R for measuring the left measuring optical system 30L and the right eye to be examined 4R measuring the left eye to be examined 4L the same configuration, hereinafter the left measuring optical system 30L It will be described.

【0012】図1に於いて、1は光源像を被検眼4L の眼底5に投影する為の投影系であり、2は眼底5により反射された光束を受光する為の受光系であり、3は固視標系であり、投影系1、受光系2、固視標系3は被検眼4L に対向して配置される。 [0012] In FIG. 1, 1 is a projection system for projecting the light source image on the fundus 5 of the eye 4L, 2 is a light receiving system for receiving the light beam reflected by the fundus 5, 3 It is a fixation target system, the projection system 1, the light receiving system 2, a fixation target system 3 is arranged opposite the eye 4L.

【0013】前記投影系1は、赤外光を発する光源6、 [0013] The projection system 1 comprises a light source 6 for emitting infrared light,
リレーレンズ11及び該光源6からの光束を被検眼4L Subject's eye the light from the relay lens 11 and the light source 6 4L
に向けて反射させる為のミラー7、移動ミラー8、該ミラー7と該移動ミラー8との間に配された対物レンズ9 Mirror 7 for reflecting toward the movement mirror 8, an objective lens 9 disposed between the mirror 7 and the mobile mirror 8
から成り、該投影系1は前記光源6からの光束を瞳孔1 From made, the projection system 1 pupil 1 a light beam from the light source 6
0を通して眼底5上に光源6の像を形成する様に投影するもので、被検眼4L の眼屈折力が基準ディオプター値(基準屈折力)の場合に、前記眼底5上に光源6の像が合焦される様に光源6と被検眼4L との距離が設定されている。 0 through designed to project so as to form an image of the light source 6 onto the fundus 5, when the reference diopter value eye refractive power of the eye 4L (reference refracting power), the image of the light source 6 on the fundus 5 distance between the light source 6 as being focused the eye 4L is set.

【0014】前記移動ミラー8は、特に図示しない移動機構部に支持されスイッチ等の操作で光軸に沿って矢印方向に移動する様になっている。 [0014] The movable mirror 8, in particular turned as to move in the direction of the arrow along the optical axis by the operation of such is supported by the moving mechanism (not shown) switches.

【0015】前記受光系2は、可視光透過、赤外光に対しては1部透過1部反射のハーフミラー12、リレーレンズ13、ミラー14、結像レンズ15から成り、眼底5からの光束を前記ハーフミラー12で分割して受光素子16へ導く。 [0015] The light receiving system 2, the visible light transmittance, the half mirror 12 of 1 part transmission 1 part reflective for infrared light, a relay lens 13, a mirror 14 made of the imaging lens 15, the light beam from the fundus 5 the divided by the half mirror 12 directs the light receiving element 16.

【0016】該受光素子16は、CCD、撮像管、或はこれらの2以上の集合体であり、受光素子16の受光面は前記結像レンズ15に関して被検眼4L の瞳孔10と共役位置に配置される。 The light receiving element 16, CCD, camera tube, or a 2 or more sets of these, the light receiving surface of the light receiving element 16 is arranged in the pupil 10 is conjugate position of the eye 4L with respect to the imaging lens 15 It is.

【0017】前記受光系2の光路内には、ハーフミラー12に関して光源6と共役な位置に眼底5からの光束の一部を遮光する為のエッヂ状の遮光部材17を配置する。 [0017] The light receiving system 2 in the optical path, placing the edge-like light blocking member 17 for shielding a part of the light beam from the fundus 5 to the light source 6 at a position conjugate with respect to the half mirror 12.

【0018】前記固視標系3は、固視標18、ミラー1 [0018] The fixation target system 3, a fixation target 18, the mirror 1
9、赤外光透過、可視光反射のミラー20から成り、前記固視標20からの光を被検眼4L に導く様になっている。 9, the infrared light transmitting consists mirror 20 of the visible light reflection, it has become as guides the eye 4L light from the fixation target 20.

【0019】尚、図1中には特に図示していないが、被検眼の様子を観察できる様モニタテレビ等が設けられている。 [0019] Although not specifically illustrated in Figure 1, it is such as a monitor television as capable observe the eye to be examined is provided.

【0020】又、前記投影系1、前記受光系2、固視標系3は少なくとも前記光源6、前記遮光部材17、固視標18が一体的、或は同期して移動し、且これらの共役関係が損われない様になっている。 [0020] Also, the projection system 1, the light receiving system 2, a fixation target system 3 is at least the light source 6, the light shielding member 17, the fixation target 18 are moved integrally, or in synchronization with, 且 of conjugate relationship is given as not impaired.

【0021】又、前記受光素子16には演算器(図示せず)が接続され、該演算器は受光素子16の受光状態、 [0021] Further, said light-receiving element 16 is connected calculator (not shown), the arithmetic unit light receiving state of the light-receiving element 16,
光量分布よりディオプター値を演算する様になっている。 The amount of light has become as to calculate the diopter value than distribution.

【0022】前記眼底5からの光束は被検眼のディオプター値によって前記遮光部材17によって遮られる状態が変化し、この変化は前記受光素子16上に投影された光束の光量分布として現れ、而も該光量分布は被検眼のディオプター値に対応する。 [0022] The light flux from the fundus 5 wherein the state is changed to be shielded by the light shielding member 17 by the diopter value of the eye, this change appears as the light amount distribution of the light beam projected onto the light receiving element 16, Thus also the light intensity distribution corresponding to the diopter value of the eye. 従って、受光素子16の受光状態から光量分布、具体的には該光量分布の傾斜からディオプター値を演算することができる。 Accordingly, the light amount distribution from the light receiving state of the light-receiving element 16, specifically it is possible to calculate the diopter value from the inclination of the optical amount distribution.

【0023】以下、作動について説明する。 [0023] In the following, a description will be given of the operation.

【0024】先ず、検者が被検眼の両眼部がモニタ画面上に映る程度にアライメントを行った後、付属のスイッチを操作し、前記移動ミラー8を移動させ、被検眼両瞳孔10をアライメントエリア内に入れピントを合せる。 [0024] First, after the examiner eyes part of the eye was performed alignment to such an extent that reflected on the monitor screen, by operating the attached switch, moving the movable mirror 8, the alignment the eye both pupils 10 adjust the focus placed in the area.

【0025】この時、フォトレフラクションの原理より装置の光軸と被検眼4L,4R の光軸は、アライメントエリア内に被検眼瞳孔10が入っていればよいので、合致させる必要はない。 [0025] At this time, the optical axis and the subject's eye 4L of the apparatus the principle of the photo-les fractions, the optical axis of the 4R, since it is sufficient that the subject's eye pupil 10 enters the alignment area need not match. この状態に於いて被検眼4L,4R Subject's eye 4L In this state, 4R
は、両眼で固視標18を見ており、検者が測定スイッチを押し、前測定をする。 Is a look at the fixation target 18 in both eyes, the examiner presses the measurement switch, the previous measurement.

【0026】前測定により、被検眼の大体の眼屈折力が判明するので、前測定の結果から正確な眼屈折力を求めるに適正な光源6、遮光部材17、固視標18の位置を算出することができる。 [0026] By pre-measured, calculated since rough eye refractive power of the eye is known, appropriate light source 6 to obtain an accurate eye refractive power from the result of the previous measurement, the light blocking member 17, the position of the fixation target 18 can do. 而して、光源6、遮光部材1 And Thus, the light source 6, the light shielding member 1
7、固視標18を、前記算出した位置迄一体に移動する。 7, the fixation target 18, and moves together to the position where the calculated.

【0027】次に、被検者に固視標をはっきり見せ、雲霧視させた後、本測定を行い、被検眼の眼屈折力を求める。 Next, it shows clearly fixation target to the subject, after fogging vision, make this measurement to determine the ocular refracting power of the eye.

【0028】一般に、左右の屈折力は異なっており、前記光源6、遮光部材17、固視標18の一体的な移動は、左眼、右眼それぞれの屈折力に応じて行う。 [0028] In general, the refractive power of the left and right are different, the light source 6, the light shielding member 17, the integral movement of the fixation target 18, the left eye is performed in accordance with the refractive power of each right eye. 又、光源6、遮光部材17、固視標18を移動させる機構は、 Moreover, mechanisms for moving the light source 6, the light shielding member 17, the fixation target 18,
左右それぞれ独立して移動できる様にしてもよく、又、 May be in the manner can be moved left and right independently of each other, also,
左右一体に移動させる機構とし、時間的にずらして左右個別に移動させてもよい。 And mechanism for moving the left and right together may be moved right and left individually staggered in time.

【0029】又、左眼、右眼どちらかの測定光学系の光軸と被検眼の光軸とを合せ、合せた方の固視標のみ照明して測定する様にすれば、より正確な測定が行える。 [0029] In addition, the left eye, combined with the optical axis and the optical axis of the examined eye of either the measuring optical system the right eye, if as measured by illuminating only the fixation target towards which combined, more accurate measurement can be performed.

【0030】尚、上記実施例は、投影系、受光系、固視標系を左右被検眼に対してそれぞれ設けたが、1組のみで構成してもよいことは勿論である。 [0030] The above embodiment is the projection system, the light receiving system, is provided each fixation target system relative lateral subject's eye, is a matter of course that may be composed of only one set.

【0031】 [0031]

【発明の効果】以上述べた如く本発明によれば、アライメントイ作業を行う場合に、被検者に位置合せを協力してもらう必要もなく、又装置全体を動かす必要がないので、測定前のアライメント作業が著しく容易となり、且迅速に行えるという優れた効果を発揮する。 According to the above mentioned as the present invention, when performing alignment Lee work, it is not necessary to have them cooperate alignment to the subject, and there is no need to move the entire device, prior to measurement alignment work is remarkably facilitated and exhibits an excellent effect that allows to 且迅 speed.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例を示す基本概略図である。 1 is a basic schematic diagram showing an embodiment of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 投影系 2 受光系 3 固視標系 4L 左被検眼 4R 右被検眼 5 被検眼眼底 6 光源 8 移動ミラー 16 受光素子 17 遮光部材 18 固視標 1 projection system 2 receiving system 3 fixation target system 4L left eye to be examined 4R right eye to be examined 5 fundus 6 source 8 moving mirror 16 light receiving element 17 the light shielding member 18 a fixation target

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 被検眼眼底に光源像を投影する為の投影系と、該被検眼眼底からの反射光束を受光素子に導く為の受光系と、該受光系の光路内に配置され受光光束の一部を遮光する為の遮光部材と、固視標系とを有し、該受光素子上に形成された光量分布により被検眼の眼屈折力を測定する眼屈折力測定装置に於いて、前記投影系、受光系、固視標系の共通光路部分に移動ミラーを設け、被検眼位置に合せて前記移動ミラーを移動可能としたことを特徴とする眼屈折力測定装置。 1. A projection system for projecting the light source image on the fundus of the eye, 該被's eye and receiving system of the reflected light beam for guiding the light receiving element from the fundus, is disposed in the optical path of the light receiving system receiving light beams a light shielding member for shielding a part of, and a fixation target system, in the eye refractive power measurement apparatus for measuring eye refractive power of the eye by light intensity distribution formed on the light receiving element, the projection system, the light receiving system, a common optical path portion of the fixation target system to provide a moving mirror, the eye refractive power measurement apparatus, characterized in that the movable said moving mirror in accordance with the subject's eye position.
  2. 【請求項2】 被検眼眼底に光源像を投影する為の投影系と、該被検眼眼底からの反射光束を受光素子に導く為の受光系と、該受光系の光路内に配置され受光光束の一部を遮光する為の遮光部材と、固視標系とを有し、該受光素子上に形成された光量分布により被検眼の眼屈折力を測定する眼屈折力測定装置に於いて、少なくとも投影系の光源と受光系の受光素子と、固視標系の固視標とを共役位置を保持して移動可能としたことを特徴とする請求項1の眼屈折力測定装置。 Wherein a projection system for projecting the light source image on the fundus of the eye, 該被's eye and receiving system of the reflected light beam for guiding the light receiving element from the fundus, is disposed in the optical path of the light receiving system receiving light beams a light shielding member for shielding a part of, and a fixation target system, in the eye refractive power measurement apparatus for measuring eye refractive power of the eye by light intensity distribution formed on the light receiving element, at least a projection system of the light source and the light receiving element of the light receiving system, a fixation target system of the fixation target and the eye refractive power measurement apparatus according to claim 1, characterized in that the movable holding a conjugate position.
JP4061084A 1992-02-17 1992-02-17 Eye refracting power measuring instrument Pending JPH05220113A (en)

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JP4061084A JPH05220113A (en) 1992-02-17 1992-02-17 Eye refracting power measuring instrument

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JPH05220113A true JPH05220113A (en) 1993-08-31

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003102688A (en) * 2001-09-28 2003-04-08 Topcon Corp Ophthalmic equipment
WO2006033171A1 (en) * 2004-09-22 2006-03-30 Takagi Seiko Co., Ltd. Ophthalmologic examination instrument
JP2014094313A (en) * 2008-03-27 2014-05-22 Doheny Eye Inst Optical coherence tomography apparatus and optical coherence tomography system
US9226856B2 (en) 2013-03-14 2016-01-05 Envision Diagnostics, Inc. Inflatable medical interfaces and other medical devices, systems, and methods
US9492079B2 (en) 2008-07-18 2016-11-15 Doheny Eye Institute Optical coherence tomography-based ophthalmic testing methods, devices and systems

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003102688A (en) * 2001-09-28 2003-04-08 Topcon Corp Ophthalmic equipment
WO2006033171A1 (en) * 2004-09-22 2006-03-30 Takagi Seiko Co., Ltd. Ophthalmologic examination instrument
JP2006087614A (en) * 2004-09-22 2006-04-06 Kenji Kashiwagi Ophthalmologic examination apparatus
JP4541084B2 (en) * 2004-09-22 2010-09-08 賢治 柏木 Ophthalmic examination equipment
JP2014094313A (en) * 2008-03-27 2014-05-22 Doheny Eye Inst Optical coherence tomography apparatus and optical coherence tomography system
US10165941B2 (en) 2008-03-27 2019-01-01 Doheny Eye Institute Optical coherence tomography-based ophthalmic testing methods, devices and systems
US9492079B2 (en) 2008-07-18 2016-11-15 Doheny Eye Institute Optical coherence tomography-based ophthalmic testing methods, devices and systems
US9226856B2 (en) 2013-03-14 2016-01-05 Envision Diagnostics, Inc. Inflatable medical interfaces and other medical devices, systems, and methods

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