Illuminating device and projector

Details Illuminating device and projector Illuminating device and projector

2004-11-19

2009-02-03

Koval, Melissa J (Department: 2862)

Optics: image projectors

Polarizer or interference filter

C353S037000, C353S094000, C353S098000, C353S102000, C349S009000, C359S489040, C362S561000, C385S901000

Reexamination Certificate

active

07484850

ABSTRACT:
Aspects of the invention can provide an illuminating device and the like capable of efficiently supplying polarized light in a particular oscillation direction and suitable for a projector having a liquid crystal type spatial light modulator. The device can include a light source that supplies light, a collimating optical system that collimates the light from the light source into a substantially parallel light, and a reflecting type polarizing plate that transmits polarized light in a particular oscillation direction in the light from the collimating optical system and reflects polarized light in an oscillation direction different from the particular oscillation direction. The light source can include a reflecting portion that reflects light reflected by the reflecting type polarizing plate and advancing in the direction of the light source toward the collimating optical system.

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