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:
Jan. 22, 2019
Filed:
Apr. 21, 2017
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Hiroto Tomioka, Chino, JP;
Tetsuo Nishida, Suwa, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 5/347 (2006.01); B25J 13/08 (2006.01); G01D 5/34 (2006.01); H01S 5/026 (2006.01); H01S 5/183 (2006.01); H01S 5/042 (2006.01); H01S 5/343 (2006.01); H01S 5/42 (2006.01);
U.S. Cl.
CPC ...
G01D 5/3473 (2013.01); B25J 13/088 (2013.01); G01D 5/345 (2013.01); H01S 5/0264 (2013.01); H01S 5/18311 (2013.01); H01S 5/18355 (2013.01); H01S 5/0425 (2013.01); H01S 5/34313 (2013.01); H01S 5/423 (2013.01); H01S 2301/176 (2013.01);
Abstract
An encoder includes an optical scale that is so provided as to be pivotable around a pivotal axis and includes a polarizing portion having a polarization characteristic, a light outputting portion that outputs linearly polarized light toward the polarizing portion, and a light detecting portion that detects the linearly polarized light from the optical scale. The light outputting portion includes a vertical cavity surface emitting laser, and light emitted from the vertical cavity surface emitting laser spreads at an angle greater than or equal to 5° but smaller than or equal to 20°.