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:
Sep. 19, 2006
Filed:
Mar. 14, 2005
Applicant:
Kenichi Kojima, Kawasaki, JP;
Inventor:
Kenichi Kojima, Kawasaki, JP;
Assignee:
Mitutoyo Corporation, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/36 (2006.01); G02B 27/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a scale for a reflective photoelectric encoder in which a reflective film is not formed on the side faces of phase gratings, an edge angle θ of the phase grating is set larger than 80 degrees and less than 90 degrees. Accordingly, stable diffraction efficiency is obtained, even if there are variations in the shape and size of the gratings.
Kojima, Kenichi. (2006). Scale for reflective photoelectric encoder and reflective photoelectric encoder (U.S. Patent No. 7109472). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7109472
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