Projection lenses for use with large pixelized panels
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United States of America Patent
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-
Feb 8, 2000
Grant Date -
N/A
app pub date -
Aug 11, 1997
filing date -
Aug 16, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A projection lens for use with LCD panels is provided. The lens has a first lens unit which has a positive power and a second lens unit which has a negative power. The first lens unit contains at least four lens elements, namely, a positive first lens element, a negative second lens element which is composed of a high dispersion material, a third lens element of weak optical power, and a positive fourth lens element of strong optical power. The projection lens achieves a correction of chromatic aberration on the order of about a quarter of pixel for large LCD panels having pixels on the order of 200 microns.
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