Optical member, illuminating device, and projection type...

Details Optical member, illuminating device, and projection type... Optical member, illuminating device, and projection type...

2007-07-03

2007-07-03

Dowling, William C. (Department: 2851)

Optics: image projectors

Plural

C353S030000, C362S231000, C362S234000, C359S634000

Reexamination Certificate

active

11085275

ABSTRACT:
A LED light source is formed of a plurality of LEDs (light-emitting diodes). Primary optical axes of respective LEDs are set to be perpendicular to the plane surface (LED arranging plane surface). A first LED light source emits a light in red, a second LED light source emits a light in green, and a third LED light source emits a light in blue. An optical member has a first dichroic mirror portion and a second dichroic mirror portion alternately arranged, and the mirror potions inclined and arranged so as to form a saw-tooth appearance. Both the first dichroic mirror portion and the second dichroic mirror portion are designed to transmit the light in blue, and reflect lights in other colors.

REFERENCES:
patent: 5453918 (1995-09-01), Hernandex
patent: 5619284 (1997-04-01), Magocs
patent: 6139166 (2000-10-01), Marshall et al.
patent: 7070281 (2006-07-01), Kato
patent: 7144121 (2006-12-01), Minano et al.
patent: 2002-189263 (2002-07-01), None
patent: 2002-296679 (2002-10-01), None

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