Zoom projection lens having a lens correction unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 9, 2002
Grant Date -
N/A
app pub date -
Feb 4, 2000
filing date -
Aug 5, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A zoom projection lens for use with LCD or DMD panels is provided. The lens has two units U1 and U2, which are moved relative to one another for zooming. It also has a corrector unit (CR) at a fixed distance from the LCD or DMD panel (PP). The corrector unit, which may be a color correcting doublet, is at the object (panel) end of the lens and has a weak power. This unit allows for a high level of distortion and lateral color correction, without unduly increasing the complexity or cost of the lens.
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Family
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Cited Art Landscape
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