Stereoscopic retinal camera having judging mechanism of alignmen

Details Stereoscopic retinal camera having judging mechanism of alignmen Stereoscopic retinal camera having judging mechanism of alignmen

1994-10-06

1996-04-02

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351208, 351221, A61B 314

Patent

active

055045421

ABSTRACT:
In an stereoscopic retinal camera having a photographing optical system capable of photographing a pair of stereoscopic fundus images by dividing a light beam reflected by the fundus of an examinee's eye into two light beams through a two-hole diaphragm, provided are an illuminating optical system for illuminating the fundus of an examinee's eye, an observing optical system for observing the fundus illuminated by the illuminating optical system, a detecting optical system for detecting the luminous flux reflected by the fundus and then directed into the observing optical system, and based on the detected result by the detecting optical system, balance of video signal strength between a pair of the fundus images is judged thereby to take a stereoscopic photograph of the fundus.

REFERENCES:
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patent: 5120122 (1992-06-01), McAdams
patent: 5141303 (1992-08-01), Yamamoto et al.
patent: 5255026 (1993-10-01), Arai et al.
patent: 5302988 (1994-04-01), Nanjo
patent: 5371557 (1994-12-01), Nanjho
patent: 5382988 (1995-01-01), Nanjo

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