Illumination optical system and projector comprising the same

Details Illumination optical system and projector comprising the same Illumination optical system and projector comprising the same

2007-03-06

2007-03-06

Fuller, Rodney (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S031000, C353S097000

Reexamination Certificate

active

09897287

ABSTRACT:
Brightness of optical equipment can be adjusted as required. An illumination optical system includes a light source, a lens array composed of a plurality of lenses for splitting light emitted from the light source into a plurality of sub-beams, and a polarization conversion element for adjusting the light polarization directions. The illumination optical system further includes a light shielding member between the lens array and the polarization conversion element to adjust the quantity of incident light on polarization splitting films provided in the polarization conversion element.

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