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:
Apr. 16, 2013
Filed:
Aug. 26, 2010
Applicant:
Masahiko Igaki, Yokohama, JP;
Inventor:
Masahiko Igaki, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 9/02 (2006.01); G01B 11/02 (2006.01); G01D 5/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical encoder includes a light source, a scaledisposed so as to face the light source, a light receiving elementconfigured to receive luminous flux from the light source through the scale, and a signal processing circuitconfigured to process an output signal of the light receiving element. A light emitting windowof the light source is constituted of a collection of a plurality of point light sources and has a shape which meets a predetermined expression.