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:
Nov. 27, 2001
Filed:
Apr. 02, 1998
Nobuyoshi Kishida, Utsunomiya, JP;
Yasuyuki Numajiri, Kawasaki, JP;
Toshiaki Okumura, Tokyo, JP;
Tomoyuki Iwanaga, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A blood vessel tracking apparatus includes a light source for emitting light and illuminating a blood-vessel with the light. The apparatus also includes a light-receiving sensor for receiving a blood vessel image made of light from the illumination light source reflected by the blood-vessel. The apparatus also includes an optical-path changing device for changing the optical-path of the light emitted from the illumination light source and a calculator for calculating the blood-vessel diameter of the illuminated blood-vessel based on an output of the light-receiving sensor, a plurality of times. A measuring device is also provided, which measures the change in blood-vessel diameter based on the calculating performed by calculating device.