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:
Sep. 22, 1992
Filed:
Nov. 05, 1990
Applicant:
Inventors:
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354403 ;
Abstract
A focus detecting device for a camera utilizing auxiliary illumination, comprises a sensor for detecting the image of a photographic object, a first light emitter for projecting a first auxiliary light toward the object, a second light emitter for projecting a second auxiliary light toward the object. The second auxiliary light illuminates a smaller area than the first auxiliary light. The first and second light emitters are selectively driven in response to brightness of the object, thereby to produce a contrasty light image onto the object.