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:
May. 08, 2012
Filed:
Nov. 13, 2008
Makoto Mizuno, Utsunomiya, JP;
Makoto Mizuno, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical element positioning apparatus of the present invention includes a moving unit including an optical element, a drive mechanismconfigured to drive the moving unit, a position measuring sensorconfigured to measure a position of the optical element, and an optical element controllerconfigured to control the drive mechanismbased on a measurement result by the position measuring sensor. An incident position (p point) at which a principal ray of a central field enters the optical elementis displaced from an optical axis of an optical system including the optical element, and the position measuring sensormeasures the incident position in an optical axis direction.