Projector having reduced color shading

Details Projector having reduced color shading Projector having reduced color shading

2011-06-14

2011-06-14

Ko, Tony (Department: 2878)

Optics: image projectors

Composite projected image

Plural projection paths with single light source

C353S031000, C353S082000, C353S094000, C349S007000, C349S008000

Reexamination Certificate

active

07959299

ABSTRACT:
A projector including a lighting device for emitting light including first, second and third colored light beams. A first dichroic mirror separates the light into the first colored light beam by reflecting the light in a certain wavelength range and transmitting the light in another wavelength range and transmitting the light in another wavelength range. A second dichroic mirror separates the other colored light beams into the second and third colored light beams by reflecting the light in a certain wavelength range and transmitting the light in another wavelength range. The second dichroic mirror separates the light from the lighting device into the colored light beams. The projector including a first color combining optical system for combining the colored light beams to emit a first image light beam.

REFERENCES:
patent: 6144420 (2000-11-01), Jung
patent: 7471822 (2008-12-01), Roth et al.
patent: 7872216 (2011-01-01), Miyazawa
patent: 2004/0246389 (2004-12-01), Roth
patent: 2008/0259231 (2008-10-01), Miyazawa
patent: 2010/0225885 (2010-09-01), Miyazawa
patent: A-1-126678 (1989-05-01), None
patent: A-2-153336 (1990-06-01), None
patent: A-3-294841 (1991-12-01), None
patent: U-3-119816 (1991-12-01), None
patent: A-5-107639 (1993-04-01), None
patent: A-5-224173 (1993-09-01), None

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