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. 15, 2022
Filed:
Feb. 27, 2019
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 27/42 (2006.01);
U.S. Cl.
CPC ...
G02B 27/4205 (2013.01); G02B 27/0172 (2013.01); G02B 2027/0105 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01); G03H 2250/00 (2013.01); G03H 2250/35 (2013.01); G03H 2250/39 (2013.01);
Abstract
A diffractive optical element according to the invention includes a holographic element configured to deflect incident light, a first substrate provided on one surface side of the holographic element, a first dielectric film provided between the first substrate and the holographic element, a second dielectric film provided on another surface side of the holographic element, and a third dielectric film provided on a side surface side of the holographic element.