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:
Jul. 19, 2022
Filed:
Jun. 08, 2020
Nichia Corporation, Anan, JP;
Norihiro Dejima, Yokohama, JP;
Masaki Omori, Toshima-ku, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
A light source device includes a plurality of external-cavity laser modules configured to emit a plurality of laser beams of different peak wavelengths, the plurality of external-cavity laser modules including at least one first laser module and at least one second laser module; and a beam combiner configured to coaxially combine the plurality of laser beams to generate a wavelength-combined beam. Each of the plurality of external-cavity laser modules includes: a collimation laser light source having a Littrow configuration, and a diffraction grating configured to selectively reflect and transmit light of a predetermined wavelength. The plurality of external-cavity laser modules are arranged so that the plurality of laser beams are incident on a same region of the beam combiner at different angles. A first distance between the first laser module and the beam combiner is different from a second distance between the second laser module and the beam combiner.