Projector and focusing method therein

Details Projector and focusing method therein Projector and focusing method therein

1995-08-11

1997-07-08

Dowling, William

Optics: image projectors

Lens support

Lens position adjustable

353 38, G03B 2114

Patent

active

056453345

ABSTRACT:
A projector in which light emitted from a light source is made incident upon a transmission type picture panel and is projected onto a screen through a projection lens system having a condenser lens and an imaging lens. The condenser lens and the imaging lens are relatively movable with respect to the transmission type picture panel in an optical axis direction. Thus, when a projection distance from the projection lens system to the screen is varied, both the condenser lens and the imaging lens are relatively moved, with respect to the transmission type picture panel, to adjust a focus of the emitted light on the screen. A focusing method for the projector is also provided.

REFERENCES:
patent: 4936657 (1990-06-01), Tejima et al.
patent: 5150138 (1992-09-01), Nakanishi et al.
patent: 5179398 (1993-01-01), Iizuka
patent: 5235362 (1993-08-01), Kronbauer
patent: 5283599 (1994-02-01), Tejima et al.
patent: 5355188 (1994-10-01), Biles et al.
patent: 5371559 (1994-12-01), Sau-Nohe et al.
patent: 5400093 (1995-03-01), Timmers
patent: 5461437 (1995-10-01), Tanaka et al.

Affiliated with

Also associated with

Rating

Projector and focusing method therein does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projector and focusing method therein, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projector and focusing method therein will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2405749