Telecentric lens systems for forming an image of an object composed of pixels
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Dec 7, 1994
filing date -
Dec 7, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Telecentric lens systems for use with pixelized panels, such as LCD or DMD panels, are provided. The systems have a long aperture stop to object distance (ASOD) and a high level of aberration correction, including a high level of lateral color correction. Preferably, the systems also have a low f-number and are wide angle. The systems include a negative first unit which produces the long ASOD, a weak second unit which includes two meniscus elements which surround the system's aperture stop, and a positive third unit which images the aperture stop to form the system's telecentric pupil.
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