OPTICAL PROJECTION SYSTEM AND METHOD FOR REDUCING UNESSENTIAL BEAMS FORMED THEREIN
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United States of America Patent
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Issued Date -
Aug 18, 2011
app pub date -
Feb 9, 2011
filing date -
Feb 12, 2010
priority date (Note) -
Abandoned
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Abstract
An optical projection system includes a light source module, a field lens, a fly-eye lens, a light valve and a projection lens. The field lens is disposed on a propagation path of a light beam, where the light beam emitted from the light source module comprises a transmission light beam passing through the field lens and a reflection light beam reflected by the field lens. The fly-eye lens is disposed on the propagation path of the light beam and between the light source module and the field lens to homogenize the light beam, where the fly-eye lens includes a plurality of lens elements arranged in an array, the reflection light beam passes through the lens element via a transmissive region of the lens element, and at least one of an opaque structure, a light-diffusing structure and a light-deflecting structure is formed on the transmissive region.
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