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:
Feb. 15, 1983
Filed:
Feb. 20, 1980
Applicant:
Inventor:
Kunihiko Araki, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G01J / ;
U.S. Cl.
CPC ...
354 25 ; 250201 ; 352140 ;
Abstract
In a pupil divisional type focusing position detection apparatus of the type capable of detecting the infocus state of a taking lens based on a phase difference of output signals produced from at least one photosensor array for receiving rays of image formation light from the exit pupil of the taking lens, the focusing position detection accuracy can be changed as desired or in accordance with F-number of the taking lens.