Polarized light converting device and method

Details Polarized light converting device and method Polarized light converting device and method

2005-06-28

2005-06-28

Nguyen, Judy (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S031000, C353S034000, C353S037000, C349S008000, C349S009000, C359S483010, C359S489040

Reexamination Certificate

active

06910771

ABSTRACT:
An integrally-formed polarized light converting device of a projection display unit comprises a medium of a predetermined thickness converting incident light entering at the Brewster Angle into light having a phase difference of λ/2 and a polarized light separating film reflecting a S polarized light wave and transmitting a P polarized light wave from the incident light entering at the Brewster Angle by a coated front side and a coated back side of said medium. A polarized light separating film having a coated front side reflects the S polarized light wave and transmits the P polarized light wave from the incident light entering at the Brewster Angle. The transmitted P polarized light wave has a phase difference of λ/2 when transmitted through a medium of predetermined thickness and proceeds in the same direction as the S polarized light wave reflected by the polarized light separating film.

REFERENCES:
patent: 5446510 (1995-08-01), Mitsutake et al.
patent: 5900973 (1999-05-01), Marcellin-Dibon et al.
patent: 6072628 (2000-06-01), Sarayeddine
patent: 6259559 (2001-07-01), Kobayashi et al.

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