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:
Aug. 24, 1993
Filed:
Jun. 23, 1992
Applicant:
Inventors:
Yoshitoshi Ito, Ome, JP;
Fumio Kawaguchi, Tokyo, JP;
Minoru Yoshida, Tokyo, JP;
Keiichi Nagai, Higashiyamato, JP;
Hiroyuki Kohida, Fuchu, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
250573 ; 250226 ; 356 39 ;
Abstract
In order to make it possible to measure the light absorption coefficient of various sorts of substances contained in a light scattering material with a high precision, the wavelength of light transmitted through the light scattering material is varied and the coefficient of light absorption is calculated, starting from a ratio of variations in the intensity of the transmitted light to variations in the wavelength.