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1. (WO2017039720) BEAM EXPANDER WITH A CURVED REFLECTIVE POLARIZER

Pub. No.:    WO/2017/039720    International Application No.:    PCT/US2015/052246
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
Applicants: 3M INNOVATIVE PROPERTIES COMPANY
Inventors: OUDERKIRK, Andrew J.
WONG, Timothy L.
YUN, Zhisheng
MCDOWELL, Erin A.
AMBUR, Gregg A.
Title: BEAM EXPANDER WITH A CURVED REFLECTIVE POLARIZER
Abstract:
A beam expander including a partial reflector, a reflective polarizer curved about two orthogonal axes and a quarter wave retarder disposed between the reflective polarizer and the partial reflector is described. The beam expander is adapted to receive an input light beam incident on the partial reflector and transmit an expanded output light beam. Illuminators and projection systems including the beam expander are described.