Ophthalmic equipment

Abstract

Abstract Translated from Japanese (57)【要約】 【目的】被検眼の眼底や角膜など被検部を非接触で撮影 乃至測定するに際し、眼科装置の面倒なアライメントや 作動距離合せの操作を改善するとともに該操作の自動化 をはかる。 【構成】被検部の撮影光学系の光軸４に斜に前眼部観察 光学系を設け、眼球面に投影したアライメント光の角膜 反射光をテレビカメラ26で撮像する一方、作動距離検出 用指標光を眼球面に投影し角膜反射光を受光素子33で受 光する。テレビカメラ26からの信号により撮影系３を観 察光学系光軸22に直交するＸＹ方向に自動的に移動させ てアライメント光による撮像画面上の光点を画面中央に 来るようにし該光点が所定範囲に入ると該光点を追尾さ せつつＺ方向に前進させ、前記受光素子33で作動距離が 検出されると撮影系３の移動を停止し、ＡＦ用赤外ＬＥ Ｄ34を点灯してフォーカスレンズを走査し受光素子39で 合焦検出後ストロボ11を発光してテレビカメラ10で被検 部を撮影する。 (57) [Abstract] [Purpose] Improves troublesome alignment and operation distance alignment operations of an ophthalmologic apparatus, and automates the operation when non-contact imaging or measurement of the fundus or cornea of the eye is performed. Measure [Arrangement] An anterior ocular segment observation optical system is provided obliquely on the optical axis 4 of the photographing optical system of the subject, and the cornea reflected light of the alignment light projected on the eye spherical surface is imaged by the TV camera 26, while the working distance is detected. The index light is projected on the eye spherical surface, and the cornea reflected light is received by the light receiving element 33. The image pickup system 3 is automatically moved in the XY directions orthogonal to the optical axis 22 of the observation optical system by a signal from the television camera 26 so that the light spot on the image pickup screen by the alignment light comes to the center of the screen and the predetermined light spot is obtained. When it enters the range, it advances in the Z direction while tracking the light spot, and when the working distance is detected by the light receiving element 33, the movement of the photographing system 3 is stopped, and the infrared LE for AF is used. D34 is turned on, the focus lens is scanned, the light receiving element 39 detects the in-focus state, and the strobe 11 emits light, and the television camera 10 photographs the portion to be inspected.

Inventors

• 👤 Yoichi Hamada
• 👤 洋一 濱田
• 👤 Tatsuya Kasahara
• 👤 達也 笠原

Bibliographic Details