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1. (WO2017039711) OPTICAL SYSTEM

Pub. No.:    WO/2017/039711    International Application No.:    PCT/US2015/052100
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 26 01:59:59 CEST 2015
IPC: G03B 21/00
G02B 27/01
B29D 11/00
G02B 5/30
G02B 17/08
G02B 13/00
Applicants: 3M INNOVATIVE PROPERTIES COMPANY
Inventors: WONG, Timothy L.
OUDERKIRK, Andrew J.
YUN, Zhisheng
MCDOWELL, Erin A.
AMBUR, Gregg A.
Title: OPTICAL SYSTEM
Abstract:
Optical systems including first and second optical stacks and adapted to provide an adjustable dioptric correction are described. The first optical stack includes a first optical lens and a partial reflector. The second optical stack is convex along orthogonal first and second axes and includes a second optical lens and a reflective polarizer. The reflective polarizer has at least one first location having a radial distance r1 from an optical axis of the second optical stack and a displacement s1 from a plane perpendicular to the optical axis at an apex of the reflective polarizer, where s1/r1 is at least 0.1. A quarter wave retarder is disposed between the second optical stack and the first optical stack.