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. 13, 2024
Filed:
Nov. 04, 2020
Katsunari Hanaoka, Miyagi, JP;
Masayuki Fujiwara, Miyagi, JP;
Katsunari Hanaoka, Miyagi, JP;
Masayuki Fujiwara, Miyagi, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A surface emitting laser element includes a first reflecting mirror; an active layer over the first reflecting mirror; a second reflecting mirror over the active layer; and a multilayer film over the second reflecting mirror. The multilayer film has a side surface including one film and inclined with respect to a principal surface of the second reflecting mirror. The multilayer film includes, in a thickness direction, two or more pairs of a first film having a first refractive index and a second film having a second refractive index higher than the first refractive index. The multilayer film has a center portion and a peripheral portion around the center portion in plan view in a direction perpendicular to the principal surface. The peripheral portion includes the side surface.