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:
Mar. 13, 1990
Filed:
May. 02, 1988
Applicant:
Inventors:
Susumu Suzuki, Shizuoka, JP;
Sumio Yagi, Shizuoka, JP;
Naotoshi Hakamata, Shizuoka, JP;
Takeo Ozaki, Shizuoka, JP;
Assignee:
Hamamatsu Photonics Kabushiki Kaisha, Shizuoka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; A61B / ;
U.S. Cl.
CPC ...
356 41 ; 128633 ;
Abstract
An examination apparatus which measures the oxygenation in objects with near infrared light transmission spectrophotometry and that automatically adjusts a transmission light quantity to a magnitude suitable for detection by a photomultiplier tube. The examination apparatus comprises a ring-like ND filter whose transmission factor varies along its circumference, a filter driver for automatically setting a transmission factor of a filter, and a light source control device for automatically controlling output powers of light sources.