JP2011229757A5

JP2011229757A5 -

Info

Publication number: JP2011229757A5
Application number: JP2010104320A
Authority: JP
Filing date: 2010-04-28
Publication date: 2013-06-06
Anticipated expiration: 2030-04-28

Description

（１）
光軸方向に移動可能なフォーカシングレンズを有し被検者眼の眼底を撮影するための撮影光学系が配置された撮影部と、
被検者眼に対して前記撮影部を相対移動させる移動機構部と、
撮像素子を有し、被検者眼の睫を含む前眼部観察像を撮影する前眼部撮像光学系と、
前記撮像素子から出力される撮像信号に基づいて被検者眼に対する前記撮影部のアライメント状態を検出するアライメント検出手段と、
被検眼眼底にフォーカス検出用の光束を投影し、その反射光束を受光して被検眼眼底に対する前記撮影光学系のフォーカス状態を検出するフォーカス検出手段と、
表示手段の主画面に前記前眼部観察像が表示された状態において、前記アライメント検出手段によって検出されるアライメント状態及び前記フォーカス検出手段によって検出されるフォーカス状態が所定の条件を満たしている場合、前記撮像光学系にて眼底撮影を行うためのトリガ信号を出力可能とする撮影制御手段と、
を備えることを特徴とする。
（２）（１）の眼底カメラにおいて、前記前眼部観察像が表示された観察画面に、前記フォーカス検出手段による検出結果を電子的に表示する表示制御手段を備えることを特徴とする。
（３）（１）〜（２）のいずれかの眼底カメラは、さらに、被検者眼の眼底観察像を撮像する眼底観察光学系を備え、
前記撮影制御手段は、
前記フォーカス検出手段の検出結果に基づいて前記フォーカシングレンズを移動させるオートフォーカスを作動させ、前記表示手段の主画面に前記前眼部観察像が表示された状態において、前記トリガ信号を出力可能とし、
オートフォーカスが適正に作動しなかった場合、前記表示手段の主画面に前記眼底観察像が表示された状態において、前記トリガ信号を出力可能とすることを特徴とする。
(1)
An imaging unit having a focusing lens movable in the optical axis direction and an imaging optical system for imaging the fundus of the subject's eye; and
A moving mechanism for moving the imaging unit relative to the subject's eye;
An anterior ocular segment imaging optical system having an imaging element and capturing an anterior ocular segment observation image including eyelids of the subject's eye;
Alignment detection means for detecting an alignment state of the imaging unit with respect to the subject's eye based on an imaging signal output from the imaging element;
A focus detection unit that projects a light beam for focus detection on the fundus of the eye to be examined, receives the reflected light beam, and detects a focus state of the photographing optical system with respect to the fundus of the eye to be examined;
In a state in which the the anterior segment observation image displayed on the main screen of the display unit, when the focus state detected by the alignment condition and the focus detecting means is detected by said alignment detecting means satisfies a predetermined condition, An imaging control means capable of outputting a trigger signal for performing fundus imaging with the imaging optical system;
It is characterized by providing.
The fundus camera (2) (1), the observation screen the anterior segment observation image is displayed, characterized in that it comprises a display control means for displaying a detection result of the focus detecting means electronically.
(3) The fundus camera according to any one of (1) to (2) further includes a fundus observation optical system that images a fundus observation image of the subject's eye,
The photographing control means includes
Based on the detection result of the focus detection unit, the auto focus for moving the focusing lens is activated, and the trigger signal can be output in a state where the anterior ocular segment observation image is displayed on the main screen of the display unit,
When the autofocus does not operate properly, the trigger signal can be output in a state where the fundus observation image is displayed on the main screen of the display means.

Claims

An imaging unit having a focusing lens movable in the optical axis direction and an imaging optical system for imaging the fundus of the subject's eye; and
A moving mechanism for moving the imaging unit relative to the subject's eye;
An anterior ocular segment imaging optical system having an imaging element and capturing an anterior ocular segment observation image including eyelids of the subject's eye;
Alignment detection means for detecting an alignment state of the imaging unit with respect to the subject's eye based on an imaging signal output from the imaging element;
A focus detection unit that projects a light beam for focus detection on the fundus of the eye to be examined, receives the reflected light beam, and detects a focus state of the imaging optical system with respect to the fundus of the eye to be examined;
In a state in which the the anterior segment observation image displayed on the main screen of the display unit, when the focus state detected by the alignment condition and the focus detecting means is detected by said alignment detecting means satisfies a predetermined condition, An imaging control means capable of outputting a trigger signal for performing fundus imaging with the imaging optical system;
A fundus camera comprising:

The fundus camera according to claim 1 , further comprising display control means for electronically displaying a detection result by the focus detection means on an observation screen on which the anterior ocular segment observation image is displayed.

The fundus camera according to any one of claims 1 to 2, further comprising a fundus observation optical system that captures a fundus observation image of a subject's eye,
The imaging control means activates an autofocus for moving the focusing lens based on a detection result of the focus detection means, and the triggering image is displayed on the main screen of the display means when the anterior ocular segment observation image is displayed. Enable signal output,
A fundus camera characterized in that the trigger signal can be output in a state where the fundus observation image is displayed on the main screen of the display means when autofocus does not operate properly.