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:
Jun. 02, 1992
Filed:
Apr. 26, 1990
Applicant:
Inventors:
Eiichi Sano, Tokyo, JP;
Hideaki Tokoro, Tokyo, JP;
Assignee:
Kabushiki Kaisha Topcon, , JP;
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
351206 ; 351207 ;
Abstract
An ophthalmological photographing instrument has photographing means for imaging the fundus of an eye to be tested every time a photographing switch is actuated, and a barrier filter to be inserted into a photographing optical path when a fluorescence photography is performed. It also has a light receiving sensor for receiving fluorescence emitted from the eye fundus and control means for inserting the barrier filter into the taking optical path every time the taking switch is actuated when a light receiving signal output from the eye fundus becomes either larger or smaller than a predetermined value.