Electronic adjustable color filter device

Details Electronic adjustable color filter device Electronic adjustable color filter device

2007-11-20

2007-11-20

Mack, Ricky (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C359S636000, C359S638000, C359S833000, C359S900000, C359S494010, C359S490020, C359S506000, C353S020000

Reexamination Certificate

active

11240875

ABSTRACT:
An electronically adjustable, combinational color filter device is provided for generating color light. Incoming light is split in a polarizing beam splitter/combiner into a first and a second element of light. One or more wave plates operate to modify the polarization state of the first element of light, and one or more dichroic reflective filters reflect portions of the first element of light having a predetermined wavelength. Similarly, one or more wave plates operate to modify the polarization state of the second element of light, and one or more dichroic reflective filters reflect portions of the second element of light having a predetermined wavelength. Reflected portions of the first element and the second elements of light are combined in the polarizing beam splitter/combiner to create color light. A spatial light modulator may be used to create color images.

REFERENCES:
patent: 6704144 (2004-03-01), Huang
patent: 6819497 (2004-11-01), Suzuki et al.
patent: 6961179 (2005-11-01), Chen et al.
patent: 7204592 (2007-04-01), O'Donnell et al.
patent: 2007/0146880 (2007-06-01), Bleha et al.

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