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:
Jun. 29, 2004
Filed:
Feb. 12, 2002
Applicant:
Inventor:
Yoshimi Kohayakawa, Tochigi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B 5/00 ;
U.S. Cl.
CPC ...
A61B 5/00 ;
Abstract
An ophthalmologic apparatus has a first light source for the measurement of a blood flow velocity by the Doppler shift method, and a second light source which differs in wavelength from the first light source and used for tracking of a blood vessel to be measured. This apparatus can simultaneously obtain a blood oxygen concentration from the difference in reflectance between two light sources from the measurement position on the blood vessel.