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. 29, 1986
Filed:
Oct. 27, 1983
Shuichi Tamura, Kanagawa, JP;
Kiyoshi Iizuka, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A blur detecting device comprises a plurality of photo-electric converter elements which are arranged in different positions to receive light from an object and to convert quantities of light received into quantities of electricity. Electric charge storing elements are included which store the quantities of electricity obtained from the photo-electric converter elements. A computing circuit in the blur detecting device obtains the ratio of the quantities of electricity stored at the electric charge storing elements. An indicating circuit compares signals produced from the computing circuit at different lengths of light receiving time and indicates a blurred state of the light received from the object.