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:
Nov. 10, 2020
Filed:
Oct. 21, 2015
Mitutoyo Corporation, Kanagawa, JP;
Akihide Kimura, Tokorozawa, JP;
MITUTOYO CORPORATION, Kawasaki, JP;
Abstract
An optical encodercomprising: a light source; a splittersplits a light from the light source, a light receiving unit; a scaleis arranged on a light path and movable in a measurement direction, a grating being arranged on a main surface of the scale; and an offset diffraction gratingincludes a plurality of diffraction gratings arranged in the optical path from the splitterto the light receiving unit, the plurality of diffraction gratings diffracting the split lights with different phases, wherein, the plurality of diffraction gratingsin the offset diffraction gratingare arranged in one plane parallel to the main surface of the scale and are offset each other in an offset direction orthogonal to the measurement direction, the light receiving unitincludes a plurality of light-receiving elements-to-arranged in the offset direction.