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:
Feb. 26, 2019
Filed:
Jan. 11, 2016
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Chihiro Nagura, Yokohama, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 5/34 (2006.01); G01D 5/347 (2006.01); G01D 5/245 (2006.01);
U.S. Cl.
CPC ...
G01D 5/34746 (2013.01); G01D 5/2457 (2013.01); G01D 5/34715 (2013.01);
Abstract
A position detection apparatus detects a position of an object, and the position detection apparatus includes a detector, a scale having a periodic pattern, the scale and the detector being movable relatively to each other, and a signal processor configured to generate a reference signal indicating a reference position of the scale, and the signal processor is configured to generate the reference signal based on a ratio of a first phase signal and a second phase signal from the detector.