Telecentric lens systems for forming an image of an object compo

Details Telecentric lens systems for forming an image of an object compo Telecentric lens systems for forming an image of an object compo

1994-12-07

1997-04-29

Sugarman, Scott J.

Optical: systems and elements

Lens

Telecentric system

359649, G02B 1322

Patent

active

056254954

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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Translation of Patent Publication No. 6-317742 (Japan Nov. 1994), Item 23 above.

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