Light pipe based projection engine

Details Light pipe based projection engine Light pipe based projection engine

2007-02-06

2007-02-06

Dowling, William C. (Department: 2851)

Optics: image projectors

Composite projected image

Reflector between lamp and screen

C353S099000, C349S008000, C359S634000

Reexamination Certificate

active

10863588

ABSTRACT:
A light pipe based projection engine includes a X-prism transmitting substantially light of a useful polarization in an output direction and reflecting substantially light of a non-useful polarization in a first orthogonal direction substantially orthogonal to the output direction. An initial reflector may reflect the non-said low, said medium, and said high bands of wavelengths in a second orthogonal direction substantially orthogonal to the output direction and the first orthogonal direction, and a final reflector may reflect the non-said low, said medium, and said high bands of wavelengths in the output direction. The non-said low, said medium, and said high bands of wavelengths may be rotated substantially to light of the useful polarization by the initial and final reflectors.

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