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. 12, 2019
Filed:
Feb. 24, 2017
Applicant:
Lumentum Operations Llc, Milpitas, CA (US);
Inventors:
Keith Anderson, Ottawa, CA;
John Michael Miller, Gatineau, CA;
Hery Djie, San Jose, CA (US);
Lu Tian, Palo Alto, CA (US);
Assignee:
Lumentum Operations LLC, Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); G02F 1/13363 (2006.01); G02F 1/1335 (2006.01); G02F 1/1343 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3058 (2013.01); G02F 1/13363 (2013.01); G02F 1/13439 (2013.01); G02F 1/133553 (2013.01); G02F 1/134309 (2013.01); G02F 2001/133567 (2013.01); G02F 2001/133638 (2013.01); G02F 2201/305 (2013.01); G02F 2201/307 (2013.01); G02F 2203/50 (2013.01);
Abstract
A sub-wavelength thin-film metal grating is placed inside a liquid crystal variable optical retarder at a selected distance from a reflective electrode to form a reflective half wave plate, thereby reducing polarization dependence of the optical retardation generated by the variable optical retarder. The approach enables to form within the device the reflective half wave plate that is suitably thin without modifying the reflective electrode of the device.