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:
Nov. 23, 1999
Applicant:
Inventors:
Norio Ishikawa, Osaka, JP;
Susumu Shirai, Toyohashi, JP;
Assignee:
Minolta Co., LTD, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 1/10 ; H01J 4/14 ;
U.S. Cl.
CPC ...
G01J 1/10 ; H01J 4/14 ;
Abstract
A light measuring apparatus is provided with a photoelectric conversion element for converting a light energy to an electrical signal, a calculation circuit for calculating a measurement value based on the electrical signal, a memory for storing a correction value, a corrector for correcting the measurement value using the correction value, and a controller for allowing calculation of a recent correction value when the timer measures elapse of a predetermined time, and permitting the memory to renewably store the recent correction value.