Illumination aperture for projection display

Details Illumination aperture for projection display Illumination aperture for projection display

2005-05-02

2009-11-03

Lee, Diane I (Department: 2851)

Optics: image projectors

Light shield, mask, hood, or diaphragm

C353S031000, C353S038000, C353S081000, C359S740000, C349S030000

Reexamination Certificate

active

07611247

ABSTRACT:
An optical system and method of increasing the contrast of a projected image. The optical system (1800) comprises a combination of aperture stops (1810, 1812) in at least one of the illumination and projection paths to filter scattered light and/or light prone to scatter into the projection aperture.

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