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:
May. 10, 2022
Filed:
May. 10, 2019
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Timothy L. Wong, St. Paul, MN (US);
Andrew J. Ouderkirk, St. Paul, MN (US);
Zhisheng Yun, Woodbury, MN (US);
Erin A. McDowell, Afton, MN (US);
Gregg A. Ambur, River Falls, WI (US);
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/28 (2006.01); G02B 17/08 (2006.01); G02B 5/30 (2006.01); B29D 11/00 (2006.01); G02B 13/00 (2006.01); G02B 27/01 (2006.01); G02B 27/14 (2006.01); G02B 27/00 (2006.01); G02B 27/09 (2006.01); G03B 21/28 (2006.01);
U.S. Cl.
CPC ...
B29D 11/00644 (2013.01); G02B 5/30 (2013.01); G02B 5/305 (2013.01); G02B 5/3041 (2013.01); G02B 5/3058 (2013.01); G02B 5/3066 (2013.01); G02B 5/3083 (2013.01); G02B 13/0055 (2013.01); G02B 17/0804 (2013.01); G02B 17/0856 (2013.01); G02B 27/0068 (2013.01); G02B 27/0081 (2013.01); G02B 27/0172 (2013.01); G02B 27/0905 (2013.01); G02B 27/0983 (2013.01); G02B 27/144 (2013.01); G02B 27/145 (2013.01); G02B 27/148 (2013.01); G02B 27/283 (2013.01); G02B 27/286 (2013.01); G03B 21/28 (2013.01); G02B 17/0896 (2013.01); G02B 2027/011 (2013.01); G02B 2027/013 (2013.01); G02B 2027/0138 (2013.01);
Abstract
Optical systems including a partial reflector, a reflective polarizer, and a retarder disposed between the partial reflector and the reflective polarizer are described. The reflective polarizer is curved about two orthogonal axes and includes at least one layer that is substantially optically uniaxial at at least one location. The optical system is adapted to provide an adjustable focus.