US 12,216,262 B2
Optical system
Michael L. Steiner, New Richmond, WI (US); Andrew J. Ouderkirk, Kirkland, WA (US); Timothy L. Wong, West 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); and Erin A. McDowell, Afton, MN (US)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Sep. 23, 2021, as Appl. No. 17/482,762.
Application 17/482,762 is a division of application No. 16/497,268, granted, now 11,156,814, previously published as PCT/IB2018/051906, filed on Mar. 21, 2018.
Claims priority of provisional application 62/479,915, filed on Mar. 31, 2017.
Prior Publication US 2022/0011557 A1, Jan. 13, 2022
Int. Cl. G02B 17/08 (2006.01); G02B 5/30 (2006.01); G02B 27/28 (2006.01)
CPC G02B 17/0856 (2013.01) [G02B 5/3083 (2013.01); G02B 27/283 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An optical system for displaying an object to a viewer, comprising:
one or more optical lenses having at least one curved major surface;
a reflective polarizer disposed on and conforming to a first major surface of the one or more optical lenses, the reflective polarizer substantially reflecting light having a first polarization state and substantially transmitting light having an orthogonal second polarization state;
a partial reflector disposed on and conforming to a different second major surface of the one or more optical lenses, the partial reflector having an average optical reflectance of at least 20%;
a first retarder layer disposed on and conforming to a third major surface of the one or more optical lenses; and
a second retarder layer disposed on and conforming to a fourth major surface, different than the third major surface, of the one or more optical lenses, such that relative to the first polarization state, the first retarder layer has a substantially uniform orientation and uniform retardance across the first retarder layer, and the second retarder layer has a substantially non-uniform retardance and non-uniform orientation across the second retarder layer.