Projection display for the generation of two orthogonal polarized images using liquid crystal on silicon panels and light emitting diodes

Lawrence Bogaert; Youri Meuret; Bart Van Giel; Hüseyin Murat; Herbert De Smet; Hugo Thienpont

doi:10.1364/AO.47.001535

Applied Optics
Vol. 47,
Issue 10,
pp. 1535-1542
(2008)
•https://doi.org/10.1364/AO.47.001535

Projection display for the generation of two orthogonal polarized images using liquid crystal on silicon panels and light emitting diodes

Lawrence Bogaert, Youri Meuret, Bart Van Giel, Hüseyin Murat, Herbert De Smet, and Hugo Thienpont

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Lawrence Bogaert, Youri Meuret, Bart Van Giel, Hüseyin Murat, Herbert De Smet, and Hugo Thienpont, "Projection display for the generation of two orthogonal polarized images using liquid crystal on silicon panels and light emitting diodes," Appl. Opt. 47, 1535-1542 (2008)

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Abstract

We present a projection system that is capable of two-dimensional and three-dimensional image display. A novel projection architecture is discussed that can simultaneously generate two linear polarized full-color images with orthogonal states of polarization using only one optical system. Both images are modulated by using two high-resolution liquid crystal on silicon panels that are illuminated with high-power light emitting diodes. The optical core and the illumination system are simulated, characterized, and optimized with nonsequential ray tracing software. A proof-of-concept demonstrator of the entire projection system is built and characterized. Important component specifications are discussed to improve the system performance.

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	Red ( $617 nm$ )	Green ( $525 nm$ )	Blue ( $464 nm$ )
2-D system	$2072 ∶ 1$	$820 ∶ 1$	$673 ∶ 1$
S-image	$2090 ∶ 1$	$820 ∶ 1$	$724 ∶ 1$
P-image	$2070 ∶ 1$	$817 ∶ 1$	$629 ∶ 1$

	Red ( $617 nm$ )	Green ( $525 nm$ )	Blue ( $464 nm$ )
S-image	$1966 ∶ 1$	$347 ∶ 1$	$686 ∶ 1$
P-image	$1981 ∶ 1$	$348 ∶ 1$	$600 ∶ 1$

	Red	Green	Blue
S-image	$143 ∶ 1$	$49 ∶ 1$	$122 ∶ 1$
P-image	$178 ∶ 1$	$41 ∶ 1$	$99 ∶ 1$

	R (%)	G (%)	B (%)
1 light path	50	50	50
$2 \times$ polarizer	$76^{2}$	$76^{2}$	$76^{2}$
$2 \times$ wavelength selective HWP	$99^{2}$	$99^{2}$	$99^{2}$
1 PBS facet AR coated	73	65	73
$2 \times$ s-polarization reflection	$99^{2}$	$99^{2}$	$99^{2}$
$2 \times$ p-polarization transmission	$70^{2}$	$70^{2}$	$68^{2}$
QWP not AR coated	85	85	85
LCOS overfill	90	90	90
LCOS reflectivity	65	65	65
Efficiency	5.0	4.4	4.7

	Red ( $617 nm$ )	Green ( $525 nm$ )	Blue ( $464 nm$ )
2-D system	$2072 ∶ 1$	$820 ∶ 1$	$673 ∶ 1$
S-image	$2090 ∶ 1$	$820 ∶ 1$	$724 ∶ 1$
P-image	$2070 ∶ 1$	$817 ∶ 1$	$629 ∶ 1$

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Applied Optics