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. 02, 2024
Filed:
May. 19, 2021
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Seiji Nishiwaki, Hyogo, JP;
Abstract
An optical apparatus includes a light source, an optical waveguide element, a light detector, and an optical system. The light source emits a light beam. The optical waveguide element includes first and second gratings. The first grating causes part of the light beam to propagate in the optical waveguide element as a guided light beam. The second grating causes part of the guided light beam to exit from the optical waveguide element. The optical system causes the light beam to enter the first grating and causes a reflected light beam from an object to enter the second grating. Part of the reflected light beam entering the second grating propagates in the optical waveguide element and exits from the first grating as an optical feedback beam. The optical system causes part of the optical feedback beam to enter the light detector as separated light beams separated depending on wavelength.