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:
Apr. 14, 2020
Filed:
Oct. 18, 2016
Mitutoyo Corporation, Kawasaki, Kanagawa, JP;
Kazuki Kitagawa, Yokohama, JP;
MITUTOYO CORPORATION, Kawasaki, JP;
Abstract
An optical pickup device according to an embodiment of the present invention includes: a light source that outputs a light beam; an irradiation optical system that projects onto a measurement target the light beam outputted from the light source; an imaging optical system that converges and images the light beam reflected by the measurement target; a light receiving part that receives the light beam imaged by the imaging optical system; and a peak separation part that when the light beams reflected by a first surface and a second surface of the measurement target are assumed to be a first reflected beam and a second reflected beam, separates peaks of light intensity of the first and second reflected beams with respect to a distance between the irradiation optical system and the measurement target in the light receiving part.