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:
Oct. 01, 2024
Filed:
Apr. 21, 2021
Applicant:
Takeshi Kawashima, Miyagi, JP;
Inventor:
Takeshi Kawashima, Miyagi, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/00 (2006.01); H01S 5/183 (2006.01); G03B 21/20 (2006.01); H01S 5/343 (2006.01); H01S 5/42 (2006.01);
U.S. Cl.
CPC ...
H01S 5/18361 (2013.01); H01S 5/18347 (2013.01); G03B 21/2033 (2013.01); H01S 5/183 (2013.01); H01S 5/18369 (2013.01); H01S 5/34333 (2013.01); H01S 5/423 (2013.01);
Abstract
A reflector includes a low refractive index layer having a first average refractive index; and a high refractive index layer having a second average refractive index. The low refractive index layer includes a laminate of alternate Ga-doped AlN layers and layers consisting essentially of GaN. The high refractive index layer includes an InGaN layer. The second average refractive index is higher than the first average refractive index.