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:
Feb. 08, 2022
Filed:
Feb. 27, 2019
Applicant:
Ricoh Company, Ltd., Tokyo, JP;
Inventors:
Takeshi Kawashima, Miyagi, JP;
Shunichi Sato, Miyagi, JP;
Morimasa Kaminishi, Miyagi, JP;
Hirokazu Iwata, Miyagi, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/183 (2006.01); H01S 5/22 (2006.01); H01S 5/024 (2006.01); H01S 5/343 (2006.01); H01S 5/42 (2006.01); H01S 5/042 (2006.01); G03B 21/20 (2006.01); F21S 41/176 (2018.01); F21S 41/16 (2018.01); G02B 26/08 (2006.01); G02B 26/10 (2006.01);
U.S. Cl.
CPC ...
H01S 5/18361 (2013.01); F21S 41/16 (2018.01); F21S 41/176 (2018.01); G03B 21/2033 (2013.01); H01S 5/02461 (2013.01); H01S 5/18347 (2013.01); H01S 5/2206 (2013.01); H01S 5/34333 (2013.01); H01S 5/423 (2013.01); G02B 26/0833 (2013.01); G02B 26/10 (2013.01); H01S 5/0425 (2013.01); H01S 2301/173 (2013.01); H01S 2304/04 (2013.01);
Abstract
A reflector includes a low refractive index layer and a high refractive index layer. The low refractive index layer has a first average refractive index and has a laminated structure in which an AlN layer and a GaN layer are alternately laminated. The high refractive index layer has a second average refractive index higher than the first average refractive index and includes an InGaN layer.