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:
Jun. 09, 2020
Filed:
Mar. 08, 2019
Applicant:
Toyoda Gosei Co., Ltd., Kiyosu-shi, JP;
Inventors:
Assignee:
TOYODA GOSEI CO., LTD., Kiyosu-Shi, Aichi-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/00 (2006.01); H01S 5/022 (2006.01); H01S 5/40 (2006.01);
U.S. Cl.
CPC ...
H01S 5/02288 (2013.01); H01S 5/022 (2013.01); H01S 5/02296 (2013.01); H01S 5/4093 (2013.01); H01S 5/0078 (2013.01); H01S 5/02208 (2013.01); H01S 5/02292 (2013.01); H01S 5/4087 (2013.01);
Abstract
Provided is a light-emitting device having low angle dependence of chromaticity as well as achieving wide-angle light distribution. The light-emitting device has a semiconductor laser diode, a first lens, a second lens, and a wavelength converting part for converting the wavelength of the laser beam emitted from the semiconductor laser diode. The first lens has a first spread angle and refracts the laser beam emitted from the semiconductor laser diode. The second lens has a second spread angle and refracts the laser beam refracted by the first lens. The second spread angle is larger than the first spread angle.