Projection lens unit

Details Projection lens unit Projection lens unit

2007-03-23

2009-11-03

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With support

C359S813000, C359S814000, C359S819000

Reexamination Certificate

active

07612951

ABSTRACT:
A projection lens system1A enlarges and projects onto a screen8, via a plurality of lenses G1to G16, image light emitted from, a light source4and modulated by DMDs3rto3b. A movable lens barrel25holds the lens G16, having positive power, which is positioned closest to the DMDs3rto3b. An outer tube24holds the movable lens barrel25to enable movement in the optical axis direction. Through thermal deformation at the time of an increase in temperature, the bimetal member27moves the movable lens barrel25in the optical axis direction so as to recede from the image formation devices which are the DMDs3rto3b.

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patent: 6-130267 (1994-05-01), None
patent: 7-209609 (1995-08-01), None
patent: 2003-185904 (2003-07-01), None

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