Illuminating system and method for improving asymmetric...

Details Illuminating system and method for improving asymmetric... Illuminating system and method for improving asymmetric...

2007-11-06

2007-11-06

Perkey, W. B. (Department: 2851)

Optics: image projectors

Distortion compensation

For projection axis inclined to screen

C353S031000, C353S081000, C348S742000, C348S771000, C362S304000, C359S292000

Reexamination Certificate

active

10065714

ABSTRACT:
An illuminating system and method for improving asymmetric projection includes a light source producing a light beam to form a light path, a projection lens disposed in the light path, a light valve inserted in the light path between the light source and the projection lens, and at least one anamorphic surface unit placed in the light path between the light source and the light valve. The anamorphic surface unit offsets a distortion of a light spot resulted from obliquely incidence on the light valve, thus an asymmetric light spot can be improved as a more symmetric one to increase illuminating collection efficiency and uniformity.

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