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. 18, 1986
Filed:
May. 17, 1985
Applicant:
Inventors:
Takashi Yamamoto, Amagasaki, JP;
Akira Ishimori, Amagasaki, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61N / ;
U.S. Cl.
CPC ...
128395 ; 2191 / ;
Abstract
A plurality of light detector pairs are spaced around the emitter end of a surgical laser handpiece with different, converging directivities to sense pilot beam reflections from a target. Their differentially compared outputs are applied to a distance determining unit having an adjustable threshold or majority decision level to detect when the end of the handpiece is at a desired distance from the target, whereupon the main laser beam is activated. Such a majority distance determination reduces activation errors due to the reflective characteristics and contours of the target surface and the angle of the handpiece.