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:
May. 20, 2003
Filed:
May. 01, 2001
Isamu Hirai, Tokyo, JP;
Yoshikazu Iida, Tokyo, JP;
Pentax Corporation, Tokyo, JP;
Abstract
A photometry device for a camera is provided with a normal light sensor, an exposure amount determining system, a plurality of colorimetric sensors that detect a color of the object using light passed through a photographing lens of the camera. The calorimetric sensors have spectral sensitivity characteristics that are different from each other. The photometry device further includes an external light sensor, a light source color compensation amount determining system, a light source effect compensation system, a colorimetry compensation amount determining system, and an exposure amount compensation system. In such a device, the light source color compensation amount determining system changes the light source color compensation amount in accordance with an object distance, or the magnification of the photographing lens.