Projection illumination systems lenses with diffractive optical elements
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United States of America Patent
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Issued Date -
Oct 25, 2007
app pub date -
Apr 21, 2006
filing date -
Apr 21, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical assembly for a projection illumination system has a refractive lenses and a diffractive lens for imaging a sheet of light from a light source onto a Spatial Light Modulator (SLM). One embodiment utilizes a fresnel lens having kinoforms formed on a surface. Such a lens may be molded using a light-weight plastic in a single step.
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