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:
Jul. 07, 1981
Filed:
Jun. 06, 1979
Yoshio Fukushima, Machida, JP;
Yoshiaki Kanmoto, Tokyo, JP;
Ricoh Company, Ltd., , JP;
Abstract
An improved focusing position detection apparatus is capable of detecting a focusing position speedily by use of a single photoelectric conversion element array. The photoelectric conversion element array is positioned so that the opposite end portions of the element array are at different distances, physically or optically, from an object and the photoelectric conversion element array is divided into three portions, the opposite end portions and an intermediate portion, and the electric output from each portion of the photoelectric conversion element is analyzed, whereby the moving direction of an optical system for obtaining the focusing position is determined.