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:
Dec. 13, 2022
Filed:
Jun. 12, 2020
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Seiji Nishiwaki, Hyogo, JP;
Abstract
An optical device includes: a light source that emits laser light; an optical waveguide element positioned on the optical path of the laser light; a first member positioned on the optical path, and has a bottom surface that faces the optical waveguide element, and a side surface that is rotationally symmetric about the optical path; and a control circuit. The optical waveguide element includes: a first grating that includes a plurality of portions arranged in the radial direction and having mutually different refractive indices, and that causes a portion of the laser light that is incident to be propagated in the radial direction within the optical waveguide element; and a second grating that includes a plurality of portions arranged outside the first grating, arranged in the radial direction, and having mutually different refractive indices, and that causes light to be emitted from the optical waveguide element.