Illuminating optical system and color image projecting device

Details Illuminating optical system and color image projecting device Illuminating optical system and color image projecting device

2005-09-13

2005-09-13

Dowling, William C. (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C353S034000, C349S005000, C359S638000

Reexamination Certificate

active

06942346

ABSTRACT:
A color image projecting device includes an illuminating optical system and a projection optical system. The illuminating optical system includes a light source emitting white light including red, green, and blue colors, a dividing-spectra block having reflecting surfaces reflecting the red and blue colors of the light received from the light source toward left and right while transmitting the green color, a red block having a dichroic mirror provided in contact with the dividing-spectra block and reflecting the red color, reflected off the reflecting surface of the dividing spectra block, toward the projection optical system, a blue color block having a dichroic mirror like that of the red block, and a green block having a dichroic mirror reflecting the transmitted green color of light toward the projection optical system.

REFERENCES:
patent: 4850685 (1989-07-01), Kamakura et al.
patent: 5864374 (1999-01-01), Ito et al.
patent: 6171421 (2001-01-01), Murata et al.
patent: 6549248 (2003-04-01), Miyazawa et al.

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