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:
Nov. 02, 1999
Filed:
Mar. 03, 1998
Applicant:
Inventor:
Norio Ishikawa, Osaka, JP;
Assignee:
Minolta Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
396275 ; 396225 ;
Abstract
A photometric device is provided with a light receiving section including a diffusing member which has a spherical diffusing surface to diffuse incident light to provide a predetermined oblique incidence angle characteristics, and a plurality of light receiving units which each receive light diffused by the diffusing member, each of the light receiving units including a light receiving surface that is a symmetrical form with respect to an optical axis of the light receiving section. The oblique incidence angle characteristics in the latitudinal direction can be made regardless of or independently of an oblique incidence angle characteristics in the longitudinal direction.