JP3018061U - Movable chin rest - Google Patents
Movable chin restInfo
- Publication number
- JP3018061U JP3018061U JP1995005498U JP549895U JP3018061U JP 3018061 U JP3018061 U JP 3018061U JP 1995005498 U JP1995005498 U JP 1995005498U JP 549895 U JP549895 U JP 549895U JP 3018061 U JP3018061 U JP 3018061U
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- eye
- optical system
- alignment
- chin rest
- forehead
- Prior art date
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Abstract
(57)【要約】
【目的】被検眼にアライメント指標光を投影して被検眼
と器械光学系とのＸ・Ｙ方向の位置合せを行うアライメ
ント装置を備えた眼科器械でアライメントを行う場合、
顎台上の被検者頭部の被検眼の位置差（奥目か否か）に
より、眼科器械の本来必要な距離合せの為の光学系の前
進量が不足してアライメント指標光の像が認識できなく
なることを防止し、前記前進量を増やすことによる器械
自体の大きくなることや撮影時間の長くなることを防止
できる構造簡単でコストの安い可動顎台を提供する。
【構成】アライメント装置を備えた眼科器械の顎台とし
て、眼科器械の基台２上にＸ・Ｙ・Ｚ方向に移動可能に
設けられた器械本体１に対向して、顎台５上方に顎台５
を挾んで所定間隔をおいて配設された支柱７，７間に、
額当て面と器械本体１の前眼部観察光学系との距離を遠
近切替可能に、少くとも２つの額当て面81, 82を備えた
額当て部材８を軸支配設する。
(57) [Abstract] [Purpose] When performing alignment with an ophthalmologic instrument equipped with an alignment device that projects alignment index light onto the eye to be aligned with the instrument optical system in the X and Y directions,
Due to the difference in the position of the subject's eye on the chin rest (whether it is the back or not), the amount of advancement of the optical system for the originally required distance adjustment of the ophthalmologic instrument is insufficient, and the image of the alignment index light is (EN) Provided is a movable chin rest which has a simple structure and can be prevented from becoming unrecognizable, and can be prevented from becoming large in size and lengthening a photographing time by increasing the forward movement amount. [Constitution] As a chin rest of an ophthalmologic instrument equipped with an alignment device, the chin rests above the chin rest 5 facing the instrument body 1 movably provided on the base 2 of the ophthalmologic instrument in the X, Y, and Z directions. Stand 5
Between the pillars 7, 7 arranged at a predetermined interval with
A forehead resting member 8 having at least two forehead resting surfaces 8 1 and 8 2 is axially controlled so that the distance between the forehead resting surface and the anterior ocular segment observation optical system of the instrument body 1 can be switched to perspective.
Description
【０００１】[0001]
この考案は、被検眼にアライメント光を投影してアライメント調整を行うよう にした眼科器械に使用する可動顎台に関する。 The present invention relates to a movable chin rest used for an ophthalmologic apparatus that is adapted to project alignment light onto an eye to be examined for alignment adjustment.
【０００２】[0002]
従来、眼科器械で被検眼に対する器械の光軸合わせ調整いわゆるアライメント 調整を容易且つ正確に行うため、被検眼にアライメント指標を投影し、前眼部観 察光学系で観察したアライメント指標の角膜などの反射像位置に基づいて眼科器 械の位置調整を行うものが、例えば特開平２−２８３３５２号公報に記載されて いるように、検眼ユニットを搭載した架台上のジョイスティックを動かして検眼 ユニットをＸ・Ｙ方向に動かしてアライメント調節するようにしたものがあり、 又、本出願人が先に提案した特開平７−３６２号公報に示されているように、撮 影系を搭載した架台を自動的にＸ・Ｙ方向に動かしてアライメント調節するよう にしたものなど、多数提案されている。 之等眼科器械を使用する場合、被検眼を眼科器械の観察乃至撮影光学系の対物 レンズに対面せしめるべく、該光学系に対向して被検眼の頭部を安定させるため に顎のせ台すなわち顎台と額受け（額当て）が設けられている。 Conventionally, in order to easily and accurately perform so-called alignment adjustment of the optical axis alignment of the instrument with the eye by an ophthalmologic instrument, an alignment index is projected on the eye to be examined, and the alignment index such as the cornea observed by the anterior ocular segment observation optical system is used. As described in, for example, Japanese Patent Laid-Open No. 2-283352, a device for adjusting the position of an ophthalmologic apparatus based on the reflection image position is used to move the optometry unit by moving a joystick on a mount equipped with the optometry unit. There is one that is moved in the Y direction to adjust the alignment. Further, as disclosed in Japanese Patent Laid-Open No. 7-362 proposed by the applicant of the present application, a mount equipped with an imaging system is automatically installed. There have been many proposals, such as one in which the alignment is adjusted by moving in the X and Y directions. When using a non-uniform ophthalmic instrument, a chin rest or jaw is used to stabilize the head of the subject's eye facing the optical system so that the subject's eye can face the objective lens of the observation or photographing optical system of the ophthalmic instrument. A stand and a forehead (forehead support) are provided.
【０００３】[0003]
多く提案されている眼科器械のアライメント装置は、「前眼部を観察し」、「 瞳又は角膜に写ったアライメント指標光の像を観察画面の指定位置へ移動させる 」という方式をとっており、該像は、ある程度のボケ範囲内で観察出来なければ 位置確認の面で動作に支障を生じる。そして、眼科器械作動の初期位置における 前眼部観察光学系による観察画面の指標光の像は、被検者の顎台当接部と被検眼 の位置差すなわち奥目又は出目の違いとから生じる焦点誤差があり、特に欧米人 の場合これが顕著で該像が認識できないことが起る。このため、次のような動作 順序をとることになる。すなわち「光学系をアライメント指標光の像が認識でき るまで前進せしめる」、「Ｘ・Ｙ方向を合致させる」、「ＸＹ方向のトラッキン グを行ないつつ前進（距離合せ・本来必要な前進）をさせる」という動作順序を とることになる。 前記で、最初の前進は奥目・出目の差より生じる焦点誤差を解消するのに必要 な前進量である。このために眼科器械として次の不都合が生じる。すなわち、 被検眼の位置差（奥目又は出目による位置の違い）により、本来必要な距 離合わせのための前進量が不足し、撮影できない場合が起きる。 このため、前進可能量を大きくとる必要がある。 従って、余分な移動量が必要で、器械本体が大きくなる。また、初期位置 より移動して撮影が行われるため撮影時間が長くなる。 という問題が起る。 Many proposed alignment devices for ophthalmologic instruments have a method of "observing the anterior segment of the eye" and "moving the image of the alignment index light reflected on the pupil or cornea to a designated position on the observation screen". If the image cannot be observed within a certain blur range, the operation will be hindered in terms of position confirmation. Then, the image of the index light on the observation screen by the anterior segment observation optical system at the initial position of the operation of the ophthalmologic instrument is based on the difference in the position between the chin rest contact portion of the subject and the subject's eye, that is, the difference between the back and the eye. There is a focus error that occurs, especially in the case of Westerners, and the image cannot be recognized. Therefore, the following operation sequence will be taken. That is, "advance the optical system until the image of the alignment index light can be recognized", "match the X and Y directions", and "advance while advancing the tracking in the XY directions" (distance matching, originally necessary advance). Will be taken in the order of operation. In the above, the first advance is the amount of advance necessary to eliminate the focus error caused by the difference between the depth and the depth. This causes the following inconvenience as an ophthalmologic instrument. In other words, due to the positional difference of the eye to be inspected (difference in position depending on the depth of the eye or the appearance of the eye), the amount of forward movement necessary for distance adjustment, which is originally necessary, may be insufficient, and imaging may not be possible. For this reason, it is necessary to set a large forward movement amount. Therefore, an extra amount of movement is required and the instrument body becomes large. Also, since the shooting is performed by moving from the initial position, the shooting time becomes long. The problem arises.
【０００４】 本考案は、このような実情を考慮してなされたものであって、被検眼の位置差 により本来必要な距離合わせのための光学系の前進量が不足してアライメント指 標像の認識出来なくなるようなことを無くし、余分な光学系の移動量を不要とし て器械本体が大きくなることを防止し、撮影時間が長くなることのないアライメ ント装置付き眼科器械を構成することのできる構造簡単でコストの安い可動顎台 を提供することを目的としている。The present invention has been made in consideration of such a situation, and the amount of advancement of the optical system for distance adjustment, which is originally necessary, is insufficient due to the positional difference of the eye to be inspected, and the alignment target image is It is possible to construct an ophthalmologic instrument with an alignment device that eliminates the possibility of becoming unrecognizable, prevents the instrument body from becoming large by eliminating the need for extra optical system movement, and does not lengthen the shooting time. The objective is to provide a movable chin rest with a simple structure and low cost.
【０００５】[0005]
前記目的を達成するために、本考案においては、被検眼にアライメント指標を 投影し前眼部観察光学系で観察したアライメント指標の被検眼からの反射像を用 いてアライメントを行うアライメント装置を備えた眼科器械に用いる可動顎台と して、被検眼に対し上下・左右・前後の各方向の移動手段を備えた前眼部観察光 学系に対向して、顎台５上方に、顎台５を挾んで所定間隔をおいて配設された支 柱７，７間に、額当て面と器械本体１の前眼部観察光学系との距離を遠近切替可 能に、少くとも２つの額当て面81, 82を備えた額当て部材8 を軸支配設したもの である。In order to achieve the above-mentioned object, the present invention includes an alignment device that projects an alignment index onto an eye to be inspected and performs alignment using a reflection image from the eye to be inspected of the alignment index observed by the anterior ocular segment observation optical system. As a movable chin rest used in an ophthalmologic apparatus, facing the anterior ocular segment observation optical system equipped with means for moving the eye up and down, left and right, and front and back, above the chin rest 5 and above the chin rest 5 The distance between the forehead resting surface and the anterior ocular segment observation optical system of the instrument body 1 can be switched between the columns 7 arranged at a predetermined interval with at least two forehead rests. The forehead support member 8 having the surfaces 8 1 and 8 2 is axially controlled.
【０００６】[0006]
本考案の可動顎台は、眼科器械本体１より被検眼にアライメント指標を投影し て、本体１の前眼部観察光学系により前眼部を観察し、被検眼の角膜又は虹彩に 写った指標光像を観察画面の中央へ移動させてアライメントを行う場合、顎台５ や眼科器械本体部１の上下方向位置調節手段により、前眼部観察光学系光軸と被 検眼との上下方向の位置合わせをするとともに、被検眼が左眼か右眼かに対応し て、器械の光学系本体部１の左右方向の移動手段により、前眼部観察光学系で被 検眼の前眼部が観察できるようにした後、アライメント指標を点灯・投影してア ライメントを行うが、このとき、前眼部観察光学系乃至撮影光学系を含む光学系 本体部１を被検眼方向に移動せしめることなく、顎台５上方に支柱７，７間に配 置された前眼部観察光学系との距離の異なる少くとも遠近２つの額当て面81, 82 を有する額当て部材８を操作して、被検眼が普通一般の場合は距離の遠い額当て 面を用い、西欧人のように奥目の場合は額当て面を距離の近い例に切替えること により、アライメント指標の被検眼からの反射光像を確実に前眼部観察光学系の 観察画面上に認識することが出来る。（この場合、遠近切替を３ケ乃至４ケの額 当て面を用いるようにしても良い。）従って被検眼が奥目の場合でも、前眼部観 察光学系乃至撮影光学系の前進量が不足してアライメント指標像を認識乃至被検 部の撮影ができなくなるのを防止することができる。さらに前眼部観察光学系乃 至撮影光学系の前進可能量を大きくとる必要がなく器械本体寸法を小さくするこ とができ、初期位置より観察乃至撮影位置までの光学系の移動量を少くすること ができるため、観察乃至撮影に要する時間を短かくすることができる。The movable chin rest of the present invention projects an alignment index from the ophthalmic instrument main body 1 onto the eye to be inspected, observes the anterior segment of the eye with the anterior ocular segment observing optical system of the main body 1, and the index appears on the cornea or iris of the eye to be examined When the optical image is moved to the center of the observation screen for alignment, the vertical position adjusting means of the chin rest 5 and the ophthalmologic instrument body 1 adjusts the vertical position between the optical axis of the anterior segment observation optical system and the eye to be examined. While aligning, the anterior segment of the eye can be observed with the anterior segment observation optical system by the lateral movement means of the optical system body 1 of the instrument depending on whether the eye is the left eye or the right eye. After that, the alignment index is turned on and projected to perform the alignment. At this time, the optics including the anterior ocular segment observation optical system or the imaging optical system 1 is moved without moving the main body 1 toward the eye to be inspected. The anterior segment of the eye placed between the columns 7 and 7 above the table 5. By operating the forehead contact member 8 having a different at least perspective two forehead rest surfaces 81, 82 of the distance between the observation optical system, if the eye to be examined is usually generally used far forehead surface of the distance, Western Europe In the case of a human being, for example, when the depth of the forehead is short, the reflected light image from the eye to be inspected as the alignment index can be reliably recognized on the observation screen of the anterior segment observation optical system. I can. (In this case, three or four forehead contact surfaces may be used to switch perspective.) Therefore, even when the eye to be inspected is the back, the amount of advancement of the anterior segment observation optical system or the imaging optical system is large. It is possible to prevent that the alignment index image cannot be recognized and the subject cannot be imaged due to a shortage. Furthermore, it is not necessary to increase the advanceable amount of the anterior ocular segment observation optical system or the photographing optical system, and the size of the instrument main body can be reduced, and the amount of movement of the optical system from the initial position to the observation or photographing position is reduced. Therefore, the time required for observation or photographing can be shortened.
【０００７】[0007]
本考案の実施例を、添付の図面に基づいて説明する。 図１は、本考案を角膜内皮撮影装置などの眼科装置に実施した場合の斜視図で 、図２は、額当て部材の額当て面の切替状態を示す斜視図である。 Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view when the present invention is applied to an ophthalmologic apparatus such as a corneal endothelium imaging apparatus, and FIG. 2 is a perspective view showing a switching state of a forehead resting surface of a forehead resting member.
【０００８】 図１において、光学系全体を内蔵した眼科器械本体（角膜内皮撮影装置本体な ど）１は、基台２上に上下・左右・前後方向（Ｘ・Ｙ・Ｚ方向）に移動自在に設 けられており、基台２の前部には顎台ベース３が固着されている。該顎台ベース ３の上面前部中央の所定位置に上下方向に昇降自在に設けられた支持軸４上部に 、所定形状の顎台５が取付けられている。また、該顎台ベース３上面の左右両側 部に、左右一対の支柱７，７が植設されており、該支柱７，７の上端部の間に、 所定形状の額当て部材８が額当て面と器械本体１の前眼部観察光学系との距離を 遠近２段に切替可能に軸支配設されている。In FIG. 1, an ophthalmologic apparatus main body (such as a corneal endothelium imaging apparatus main body) 1 having a built-in optical system is movable on a base 2 in up / down / left / right / forward / backward directions (X / Y / Z directions). The jaw base 3 is fixed to the front part of the base 2. A chin rest 5 having a predetermined shape is attached to an upper part of a support shaft 4 which is vertically movable at a predetermined position in the center of the upper front part of the chin rest base 3. A pair of left and right struts 7, 7 are planted on both left and right sides of the upper surface of the chin rest base 3, and a forehead rest member 8 having a predetermined shape is placed between the upper ends of the struts 7, 7. The axis is controlled so that the distance between the surface and the anterior ocular segment observation optical system of the instrument body 1 can be switched between two stages, perspective and perspective.
【０００９】 額当て部材８は、断面が方形の所定長の角柱の長手方向の相隣る両側面8a，8b に、夫々所定深さの前眼部観察光学系との距離の遠い額当て面81と、該距離の近 い額当て面82とが形成されており、該角柱の両端面には、偏心状態すなわち前記 両側面8a, 8bの一方の側面8aに遠く、他方の側面8bに近い位置に軸心が位置する ように左右に支持軸91, 92が植設されている（図２参照）。該支持軸の一方の支 持軸91の端部は、前記両側面8a, 8bに平行な側面を有するごとく小寸の角柱91' に形成されており、左右一対の各支持軸91, 92は夫々前記支柱７，７上端部に固 着された左右一対の軸受ブロック101, 102に軸支されると共に、前記一方の支持 軸91の前記角柱部91' は軸受けブロック101 に内蔵されたＵ字形の板バネ11に挾 持されて、額当て面の前眼部観察光学系との距離を遠位置と近位置に切替えたと き、該位置で額当て部材８を定位するようになっている。これにより、額当て部 材８両側の角柱平面部をつまんで該額当て部材８を回動定位せしめることにより 、額当て面を前眼部観察方向Ｖに対して偏位 (δ) せしめて、２つの額当て面81 , 82の何れかを使用して、被検眼の奥目か否かによる位置差に対応して被検眼と 前眼部観察光学系との距離を遠近いずれかに切換えることができ、アライメント 指標の被検眼からの反射光像を確実に前眼部観察光学系の観察画面上に認識せし めることができる。なお、額当て部材８を回動せしめるに当って、前記支持軸91 又は92の端部を前記軸受けブロック101 又は102 より外方に突出せしめて小型の 操作レバーを付設して、該レバーを回動せしめるようにしても良い。The forehead rest member 8 has a rectangular cross section with a predetermined length on both side surfaces 8a and 8b adjacent to each other in the longitudinal direction of the prism having a predetermined length. The forehead rest surface is a predetermined depth away from the anterior ocular segment observation optical system. 8 1 and a forehead contact surface 8 2 close to the distance are formed, and both end surfaces of the prism are eccentric, that is, far from one side surface 8a of both side surfaces 8a and 8b and the other side surface 8b. Support shafts 9 1 and 9 2 are planted on the left and right so that the shaft center is located close to (see Fig. 2). One end supporting region axis 9 1 of the support shaft, the side surfaces 8a, is formed in the small dimensions of the prism 9 1 'as having parallel sides 8b, a pair of left and right support shafts 9 1 , 9 2 are rotatably supported by a pair of left and right bearing blocks 10 1 , 10 2 fixed to the upper ends of the stanchions 7, 7, respectively, and the prismatic portion 9 1 ′ of the one support shaft 9 1 is a bearing. is挾lifting the leaf spring 11 of the U-shaped built in block 10 1, came to have switched the distance between the anterior segment observation optical system of the forehead rest surface at the distal position and the proximal position, the forehead contact member 8 at the position Is localized. As a result, the forehead support member 8 is pinched by the prismatic flat surface portions on both sides to rotationally orient the forehead support member 8, whereby the forehead support surface is displaced (δ) with respect to the anterior segment observation direction V, Either of the two forehead contact surfaces 8 1 and 8 2 is used to set the distance between the eye to be inspected and the anterior segment observation optical system to either near or far in accordance with the position difference depending on whether the eye is the back eye or not. It can be switched, and the reflected light image of the alignment index from the eye to be examined can be surely recognized on the observation screen of the anterior segment observation optical system. When rotating the forehead support member 8, an end portion of the support shaft 9 1 or 9 2 is projected outward from the bearing block 10 1 or 10 2 to attach a small operation lever, The lever may be rotated.
【００１０】 眼科器械本体１のハウジング内には、例えば、角膜内皮撮影装置の光学系の本 体部分が内蔵されている。該角膜内皮撮影装置は、本出願人が先に特開平７−３ ６２号（特願平５−１６６１３２）公報に於て提案したものを例にとれば、被検 眼の眼軸方向に光軸が配置された前眼部観察光学形光軸に斜方向から眼球面をス リット照明して、該照明光に基づき被検部の拡大像を、拡大撮影光学系で前眼部 観察光学系のテレビカメラの撮像画面上に結像させるようにする一方、前眼部観 察光学系と同軸で眼球面に投影するアライメント光の角膜反射像を該テレビカメ ラで撮像して、アライメント光の角膜反射像の撮像画面上の位置に応じて、撮影 系１を前眼部観察光学系光軸に対し、Ｘ・Ｙ方向に自動的に移動させて反射光に よる光点を画面の所定位置に来るようにし、該光点を所定領域内で追尾させつつ Ｚ方向に前進せしめ、テレビカメラと別光路を介した合焦検知用受光素子でスリ ット光により角膜上皮と角膜内皮の合焦を順次検知して、テレビカメラで被検部 の角膜内皮を拡大撮影するようになっている。In the housing of the ophthalmologic instrument body 1, for example, the main part of the optical system of the corneal endothelium imaging apparatus is incorporated. The corneal endothelium imaging apparatus is, for example, the one proposed by the present applicant in Japanese Patent Application Laid-Open No. 7-362 (Japanese Patent Application No. 5-166132). Anterior ocular segment observation optical system in which the axis is arranged. While the image is formed on the image pickup screen of the television camera, the cornea reflection image of the alignment light projected on the ocular spherical surface coaxially with the anterior segment observation optical system is imaged by the television camera, and the alignment light of the alignment light is captured. The imaging system 1 is automatically moved in the X and Y directions with respect to the optical axis of the anterior segment observation optical system according to the position of the image of the corneal reflection image on the screen, and the light spot due to the reflected light is moved to a predetermined position on the screen. And move it in the Z direction while tracking the light spot within a predetermined area, and separate it from the TV camera. Sequentially detecting the focus of the corneal epithelium and the corneal endothelium focusing detection light-receiving element via the road by Sri Tsu bets light, so as to expand shooting corneal endothelium of the examined portion by a television camera.
【００１１】 この撮影に当っては、眼科器械である角膜内皮撮影装置の撮影ボタンを押すこ とにより、眼科器械本体１の角膜内皮撮影装置の撮影系を内蔵したハウジング背 面に設けられたモニタ画面1bに前眼部観察光学系による外部像が映し出される。 次いで、被検者は顎を顎台５に載せ、額を額当て部材８の切替えられて例えば前 眼部観察光学系より遠い標準状態にある額当て面81に当接せしめて頭部を顎台５ に固定し、ドクターの指示に従ってハウジングの窓1a内の固視標を見る。次いで ドクターは図示しない操作釦を操作して眼科器械本体１を被検眼の右目か左目か に対応した位置に移動せしめると共に（対応した位置にあるときは移動させず） 、顎台５を垂直方向に移動せしめて、前記モニタ画面1bに被検者の所要の被検眼 前眼部が写るように調節して前記撮影ボタンを再度押す。In this photographing, by pressing the photographing button of the corneal endothelium photographing apparatus which is an ophthalmic instrument, a monitor provided on the back surface of the housing of the ophthalmic instrument main body 1 in which the photographing system of the corneal endothelium photographing apparatus is incorporated. An external image is displayed on the screen 1b by the anterior segment observation optical system. Next, the subject places his or her chin on the chin rest 5, the forehead is switched to the forehead resting member 8, and, for example, abuts on the forehead resting surface 8 1 in a standard state far from the anterior ocular segment observing optical system to place the head on the head. Fix it on the chin rest 5, and look at the fixation target in the window 1a of the housing according to the doctor's instructions. Next, the doctor operates an operation button (not shown) to move the ophthalmologic apparatus main body 1 to a position corresponding to the right eye or the left eye of the eye to be examined (when it is in the corresponding position, do not move), and move the chin rest 5 in the vertical direction. Then, the monitor screen 1b is adjusted so that the desired anterior segment of the subject's eye is displayed on the monitor screen 1b, and the photographing button is pressed again.
【００１２】 このボタン押圧操作により、本体１内の合焦用の照明ランプを点灯せしめて前 記窓1aを通して眼球面を赤外光により照明すると共に、本体１内のアライメント 指標用赤外線ＬＥＤを点灯せしめてアライメント指標を眼球面に投影する。この とき、ドクターはモニタ1bに写された前眼部像にアライメント指標光の角膜から の反射光によるアライメント指標光の像（光点）が認識できたかどうか確認する 。認識できないときは、ドクターの指示により被検者は顎台をはなれ、ドクター は前記額当て部材８の側部をつまんで額当て面を前記額当て面81から前眼部観察 光学系に近い側の額当て面82に切替え再度被検者は顎台につく。これにより、被 検者が奥目の場合でもドクターは支障なくアライメント指標光の像を前眼部像上 に認識することができる。By pressing this button, the focusing illumination lamp in the main body 1 is turned on to illuminate the eye spherical surface with infrared light through the window 1a, and the infrared LED for alignment index in the main body 1 is turned on. At the very least, the alignment index is projected on the eye spherical surface. At this time, the doctor confirms whether the image (light spot) of the alignment index light due to the reflected light of the alignment index light from the cornea can be recognized in the anterior segment image displayed on the monitor 1b. If unrecognized, subjects with a doctor's instructions leave the chin rest, the doctor is close to forehead pad surface from the amount contact surface 81 to the anterior segment observation optical system pinching the sides of the amounts contact member 8 again switched to the forehead contact surface 8 second side subject attached to the chin rest. This allows the doctor to recognize the image of the alignment index light on the anterior segment image even if the subject is in the back.
【００１３】 アライメント指標光の像（光点）が認識されると、光学系を内蔵した器械本体 １は所定のプロセスに従ってアライメントするべく被検眼に対して移動させられ 、この状態はモニタ画面1bに表示される。このようにしてアライメント指標光の 光点が撮像画面中央の所定範囲内にくると、その所定範囲内で該光点を追尾して アライメントを行いつつ、器械本体１はＺ方向に、前記合焦検知用受光素子が内 皮反射を検出するまで前進せしめられ、内皮反射が検出されたとき、器械本体１ のＸ・Ｙ・Ｚ方向の移動は停止して、前記合焦用照明ランプが消灯すると同時に 、ストロボは発光してテレビカメラで撮影が行われ、撮影された角膜内皮拡大像 はフレームメモリに記録され、且つモニタ画面1bに表示された後、器械本体１は 初期の待機位置に戻る。When the image (light spot) of the alignment index light is recognized, the instrument body 1 having the built-in optical system is moved with respect to the eye to be inspected for alignment according to a predetermined process, and this state is displayed on the monitor screen 1b. Is displayed. In this way, when the light spot of the alignment index light comes within a predetermined range at the center of the image pickup screen, the instrument body 1 is focused in the Z direction while tracking the light spot within the predetermined range for alignment. When the light receiving element for detection is moved forward until it detects the inner skin reflection, and when the inner skin reflection is detected, the movement of the instrument body 1 in the X, Y, and Z directions is stopped and the focusing illumination lamp is turned off. At the same time, the strobe emits light and an image is taken by the television camera. The taken enlarged image of corneal endothelium is recorded in the frame memory and displayed on the monitor screen 1b, and then the instrument body 1 returns to the initial standby position.
【００１４】 これにより、被検眼の位置差にかかわらず、器械本体１内の前眼部観察光学系 の前進量が不足するようなことがなく、アライメント指標光の像を観察画面上の 前眼部像上に確実に認識してアライメントより撮影までの操作を安定して行うこ とができる。 前記実施例では額当て部材８の額当て面が２ケの場合につき説明したが、３ケ 乃至４ケの額当て面を切替え使用するようにしても良い。但し、２段切替の場合 は１回の認識失敗で済む場合が、３〜４段切替とすると認識失敗の増える可能性 がある。 なお、前記実施例は眼科器械が角膜内皮撮影装置の場合であるが、被検眼にア ライメント指標を投影してアライメントを行う眼科器械であれば、該顎台を眼底 カメラに用いても良く、また非接触型眼圧計に用いても良く、該顎台の使用によ り被検眼の位置差に関係なく、不都合を生じることなく、被検部の観察乃至撮影 を行うことができる。As a result, regardless of the position difference of the eye to be inspected, the amount of advancement of the anterior segment observation optical system in the instrument body 1 is not insufficient, and the image of the alignment index light is displayed on the observation screen. It is possible to reliably recognize on the image and to perform operations from alignment to shooting in a stable manner. In the above-mentioned embodiment, the case where the forehead support member 8 has two forehead support surfaces has been described, but three to four forehead support surfaces may be switched and used. However, in the case of 2-step switching, one recognition failure may be sufficient, but in the case of 3- to 4-step switching, recognition failure may increase. In the above example, the ophthalmologic apparatus is a corneal endothelium imaging apparatus, but if the ophthalmologic apparatus performs alignment by projecting an alignment index on the eye to be examined, the chin rest may be used for the fundus camera, Further, it may be used for a non-contact tonometer, and by using the chin rest, observation or photographing of the examined part can be performed without any inconvenience regardless of the positional difference of the examined eye.
【００１５】[0015]
請求項１記載の本考案の可動顎台によれば、被検眼にアライメント指標光を投 影してアライメントを行う眼科器械に顎台を設置する場合、被検者の被検眼の位 置差（奥目かどうか）に関係なく安定してアライメント指標像を前眼部観察画面 上で認識してアライメントを行うことができると共に、眼科器械の光学系の前進 可能量を大きくとる必要が無く器械寸法を小さくすることができ、初期位置より 観察乃至撮影位置までの移動量を少くして観察乃至撮影に要する時間を短かくす ることができるというすぐれた効果をもたらす構造簡単でコストの安い可動顎台 を提供することができる。 According to the movable chin rest of the present invention as set forth in claim 1, when the chin rest is installed on an ophthalmologic apparatus that projects alignment index light onto the eye to perform alignment, the position shift of the subject's eye ( The alignment index image can be stably recognized on the anterior segment observation screen regardless of whether it is the back eye or not, and alignment can be performed, and it is not necessary to increase the advanceable amount of the optical system of the ophthalmologic instrument. The movable jaw base has a simple structure and a low cost, which has an excellent effect that the movement amount from the initial position to the observation or photographing position can be reduced and the time required for observation or photographing can be shortened. Can be provided.
【図１】本考案の可動顎台を用いた眼科器械の斜視図で
ある。FIG. 1 is a perspective view of an ophthalmologic apparatus using the movable chin rest of the present invention.
【図２】可動顎台の額当て部材の額当て面の切替状態を
示す斜視図である。FIG. 2 is a perspective view showing a switching state of a forehead resting surface of a forehead resting member of a movable chin rest.
１…眼科器械本体、 ２…基台、 ５…顎台、 ７…支
柱、 ８…額当て部材、81, 82…額当て面。1 ... Ophthalmic instrument main body, 2 ... Base, 5 ... Jaw stand, 7 ... Post, 8 ... Forehead rest member, 8 1 , 8 2 ... Forehead rest surface.
Claims (1)
部観察光学系で観察したアライメント指標の被検眼から
の反射像を用いてアライメントを行うアライメント装置
を備えた眼科器械に用いる可動顎台であって、被検眼に
対し上下・左右・前後方向の移動手段を備えた眼科器械
本体１の前眼部観察光学系に対向して、顎台５上方に、
顎台５を挾んで所定間隔をおいて配設された支柱７，７
間に、額当て面と器械本体１の前眼部観察光学系との距
離を遠近切替可能に、少くとも２つの額当て面81, 82を
有する額当て部材８を軸支配設したことを特徴とする可
動顎台。1. A movable jaw stand used for an ophthalmologic apparatus equipped with an alignment device that projects an alignment index onto an eye to be inspected and performs alignment using a reflection image of the alignment index observed by an anterior segment observation optical system from the eye to be inspected. That is, facing the anterior ocular segment observation optical system of the ophthalmologic instrument main body 1 equipped with moving means for moving up and down, left and right, and front and back with respect to the eye to be examined, above the chin rest 5.
Pillars 7, 7 that are placed at a predetermined interval with the chin rest 5 interposed
In between, the forehead rest member 8 having at least two forehead rest surfaces 8 1 and 8 2 is axially controlled so that the distance between the forehead rest surface and the anterior ocular segment observation optical system of the instrument body 1 can be switched to perspective. A movable chin rest characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1995005498U JP3018061U (en) | 1995-05-12 | 1995-05-12 | Movable chin rest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1995005498U JP3018061U (en) | 1995-05-12 | 1995-05-12 | Movable chin rest |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3018061U true JP3018061U (en) | 1995-11-14 |
Family
ID=43153526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1995005498U Expired - Lifetime JP3018061U (en) | 1995-05-12 | 1995-05-12 | Movable chin rest |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3018061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024181198A1 (en) * | 2023-03-02 | 2024-09-06 | 株式会社トプコン | Forehead band, and ophthalmologic device |
-
1995
- 1995-05-12 JP JP1995005498U patent/JP3018061U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024181198A1 (en) * | 2023-03-02 | 2024-09-06 | 株式会社トプコン | Forehead band, and ophthalmologic device |
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