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:
Aug. 18, 2020
Filed:
Apr. 16, 2018
Applicant:
Lumentum Operations Llc, Milpitas, CA (US);
Inventors:
John Michael Miller, Gatineau, CA;
Gonzalo Wills, Ottawa, CA;
Assignee:
Lumentum Operations LLC, Milpitas, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/1335 (2006.01); G02B 5/30 (2006.01); G02B 5/32 (2006.01); G02F 1/153 (2006.01);
U.S. Cl.
CPC ...
G02F 1/1335 (2013.01); G02B 5/3083 (2013.01); G02B 5/32 (2013.01); G02F 1/133504 (2013.01); G02F 1/1533 (2013.01); G02F 2201/307 (2013.01);
Abstract
A sub-wavelength grating is placed inside a liquid crystal variable optical retarder to reduce polarization dependence of the optical retardation generated by the variable optical retarder. A small thickness of the sub-wavelength grating, as compared to a conventional waveplate, reduces the driving voltage penalty due to the in-cell placement of the sub-wavelength grating.