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. 08, 1997
Filed:
Apr. 15, 1996
Akira Suzuki, Kawasaki, JP;
Takao Saito, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In a focusing state or photographed object distance detector, a pair of distance measuring lenses are arranged in positions symmetrical with respect to the reference axis of a photographing lens. A pair of light-receiving element arrays are arranged behind the pair of distance measuring lenses. A pair of image signals are obtained by controlling operations of the light-receiving element arrays by CCD control sections. A conformity degree between these image signals is calculated by an integral part shifting arithmetic circuit in an element unit of each of the light-receiving element arrays. An interpolating calculation of the conformity degree is made by a decimal part arithmetic circuit to provide a precise conformity degree distribution. When a shifting amount of the pair of image signals is calculated by a shifting amount arithmetic circuit, a distribution portion providing a high conformity degree is greatly weighted by a weighting arithmetic circuit so that the shifting amount is obtained with high reliability.