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:
Oct. 15, 2013
Filed:
Jan. 05, 2012
Teppei Agawa, Yokohama, JP;
Teppei Agawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A beam splitter splits a laser beam emitted from a laser light source into a first laser beam that travels toward an object and a second laser beam. The second laser beam is received by a second photodetector. The second photodetector is positioned such that the light quantity of the second laser beam incident on the second photodetector is equal to that of the first laser beam incident on a first photodetector. A position calculator calculates displacement of the object relative to the laser light source on the basis of the difference between an output of the first photodetector and an output of the second photodetector.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile