WAVEPLATE COMPENSATION IN PROJECTION POLARIZATION CONVERSION SYSTEM

WIPO Patent Application WO/2011/106567

A3

Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a polarization conversion system (PCS). The PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. The PCS may include a polarizing beam splitter, a first optical stack, a reflector and a second quarter wave retarder. The first optical stack may include a rotator, a polarizer, a polarization switch and a first quarter wave retarder. The PCS may receive light from a projector and the PBS may direct the light toward the first optical stack. The light may be converted to a different polarization state as it passes through the first optical stack. The converted light may then be re-directed by a reflecting element to the second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light.

COLEMAN DAVID A (US)
SCHUCK MILLER H (US)
SHARP GARY D (US)
GILMAN SCOTT E (US)

PCT/US2011/026131

January 12, 2012

February 24, 2011

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MOTHEW NEIL (US)
COLEMAN DAVID A (US)
SCHUCK MILLER H (US)
SHARP GARY D (US)
GILMAN SCOTT E (US)

G02B27/28; G02B5/30; G02B30/25; G03B35/00; H04N13/363

KR20090094224A	2009-09-04
KR20090089325A	2009-08-21
JPH09265070A	1997-10-07
US20020191235A1	2002-12-19
KR20040078128A	2004-09-08
JP2009015128A	2009-01-22

MOTHEW, Neil, G.J. et al. (2001 Ross Avenue Suite 230, Dallas TX, US)

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