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. 12, 2020
Filed:
May. 14, 2018
Mitutoyo Corporation, Kawasaki, Kanagawa, JP;
Miyako Mizutani, Kanagawa, JP;
MITUTOYO CORPORATION, Kawasaki, JP;
Abstract
Provided is a photoelectric encoder that can achieve higher accuracy while maintaining reliability by reducing stray light. An encoderis a photoelectric encoder including a light source devicethat emits parallel light, a scalehaving calibrations C provided along a measurement direction, and a light receiving unitthat receives light being emitted from the light source device, and transmitted through the scale. The encoderincludes an antireflection memberthat prevents stray light generated by being reflected on the scale, from entering the light receiving unit. Because the encoderincludes the antireflection member, the encodercan achieve higher accuracy while maintaining reliability by reducing stray light entering the light receiving unit