Projection lens and projector

Details Projection lens and projector Projection lens and projector

2011-03-22

2011-03-22

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S649000, C359S676000, C359S683000, C359S684000, C359S691000

Reexamination Certificate

active

07911705

ABSTRACT:
An object of the invention is to provide a projection lens capable of sufficiently correcting lateral chromatic aberration at both of the wide-angle end and the telephoto end, with an increased zoom ratio, a less number of lens elements, and less variation in telecentricity.

REFERENCES:
patent: 5278698 (1994-01-01), Iizuka et al.
patent: 5900987 (1999-05-01), Kreitzer
patent: 6188522 (2001-02-01), Kimura et al.
patent: 7170691 (2007-01-01), Sawamoto
patent: 2004-109896 (2004-04-01), None
patent: 2005-43607 (2005-02-01), None

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