Projection lens and image display system

Details Projection lens and image display system Projection lens and image display system

2006-05-30

2006-05-30

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S680000, C359S676000

Reexamination Certificate

active

07054069

ABSTRACT:
A projection lens system is comprised of five lens groups. A first lens group forms a negative power lens group, and a second lens group forms a positive power lens group. Third, fourth, and fifth lens groups, when combined, form a positive power lens group, which helps to compensate for aberrations. At least one of the component lenses moves to adjust the system's focus. An image display system that includes such a projection lens system can project digital optical images for projection and other image display applications.

REFERENCES:
patent: 5539579 (1996-07-01), Miyatake et al.
patent: 6480340 (2002-11-01), Yamamoto
patent: 6545817 (2003-04-01), Hirose
patent: 6738196 (2004-05-01), Yamamoto
patent: 6768595 (2004-07-01), Nagahara
patent: 6809877 (2004-10-01), Nagahara

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