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:
Nov. 29, 2022
Filed:
May. 14, 2020
Applicant:
Hitachi-lg Data Storage, Inc., Tokyo, JP;
Inventors:
Takeru Utsugi, Tokyo, JP;
Hiromichi Yamakawa, Tokyo, JP;
Assignee:
HITACHI-LG DATA STORAGE, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03H 1/26 (2006.01); G02B 27/01 (2006.01); F21V 8/00 (2006.01); G03H 1/02 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G03H 1/265 (2013.01); G02B 6/005 (2013.01); G02B 6/0053 (2013.01); G02B 27/0172 (2013.01); G03H 1/0248 (2013.01); H04N 9/3182 (2013.01); G02B 2027/0109 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0174 (2013.01); G03H 2001/264 (2013.01); G03H 2223/18 (2013.01); G03H 2227/03 (2013.01);
Abstract
Provided is a waveguide having a light diffraction unit that diffracts incident light by a multiplex-recorded hologram, in which, in the light diffraction unit, a plurality of holograms having different angles with respect to an incident surface of the waveguide are formed, and when certain parallel light beams are incident, different wavelengths are diffracted by the plurality of holograms.