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:
Oct. 26, 2021
Filed:
Mar. 21, 2018
3m Innovative Properties Company, St. Paul, MN (US);
Michael L. Steiner, New Richmond, WI (US);
Andrew J. Ouderkirk, Kirkland, WA (US);
Timothy L. Wong, St. Paul, MN (US);
Zhisheng Yun, Sammamish, WA (US);
Jo A. Etter, Kirkland, WA (US);
Gilles J. Benoit, Minneapolis, MN (US);
John D. Le, Woodbury, MN (US);
Erin A. McDowell, Afton, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
An optical system including one or more optical lenses, at least one retarder layer, a reflective polarizer, and a partial reflector is provided. The at least one retarder layer may include first and second retarder layers having different wavelength dispersion curves. The at least one retarder layer may include a first retarder layer having a non-uniform fast axis orientation and/or a non-uniform retardance.