The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 1996
Filed:
Oct. 06, 1994
Nidek Co., Ltd., , JP;
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.