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. 14, 1991
Filed:
May. 26, 1989
Applicant:
Inventors:
Tomoaki Komatsu, Tokyo, JP;
Sigeo Satou, Tokyo, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
36457102 ; 73 / ; 36457107 ;
Abstract
Values of measured optical density are corrected by measuring a high and a low density which are known as standard densities to obtain their measured value by an optical densitometer subjected to a calibration; providing data for zero point correction based on the difference between the measured and known optical densities; storing the zero point correction data in a memory; and correcting the measured density of a subject by using the zero point correction data read out from the memory. For providing the zero point correction data, the known standard optical densities are previously set in the densitometer.