Projection lenses having reduced lateral color for use with pixelized panels
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United States of America Patent
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Feb 27, 2001
Grant Date -
N/A
app pub date -
May 4, 1999
filing date -
May 4, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
Projection lens for use with pixelized panels are provided which consist of a first lens unit which has a negative power and a second lens unit which has a positive power. The V-values and Q-values of the lens elements of the first and second lens units are selected so that the projection lenses can simultaneously have: (1) a high level of lateral color correction, including correction of secondary lateral color; (2) low distortion; (3) a large field of view in the direction of the image (screen); (4) a telecentric entrance pupil; and (5) a relatively long back focal length.
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