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:
Mar. 29, 2016
Filed:
Oct. 05, 2012
Applicant:
North Carolina State University, Raleigh, NC (US);
Inventors:
Michael J. Escuti, Cary, NC (US);
Ravi K. Komanduri, Raleigh, NC (US);
Kristopher F. Lawler, Jr., Cary, NC (US);
Assignee:
North Carolina State University, Raleigh, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02B 5/30 (2006.01);
U.S. Cl.
CPC ...
G02F 1/133636 (2013.01); G02B 5/3083 (2013.01);
Abstract
An optical element includes at least two stacked birefringent layers having respective local optical axes that are rotated by respective twist angles over respective thicknesses of the at least two layers, and are aligned along respective interfaces between the at least two layers. The respective twist angles and/or the respective thicknesses are different. The at least two stacked birefringent layers may be liquid crystal polymer optical retarder layers. Related devices and fabrication methods are also discussed.