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:
Jan. 29, 1991
Filed:
Apr. 12, 1990
Applicant:
Inventors:
Aki Sakurai, Tokyo, JP;
Ryoichi Nadachi, Tokyo, JP;
Assignee:
Kabushiki Kaisha Topcon, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 62 ; 354112 ;
Abstract
A stereo type eye fundus camera has an illumination optical system for illuminating the fundus of an eye to be tested, and a stereo type image formation optical system for simultaneously forming an image of the eye fundus on a sheet of film based on a reflected light from the eye fundus. The stereo type eye fundus camera also has a density pattern member for forming a density pattern image on the eye fundus.