Projection lens

Details Projection lens Projection lens

1999-08-20

2000-03-14

Sugarman, Scott J.

Optical: systems and elements

Lens

With field curvature shaping

G02B 302

Patent

active

060380780

ABSTRACT:
The present invention is to a projection lens having three lens groups of positive, negative, and positive refractive power, in order from the enlarging side. The lens is especially suitable for projection televisions that employ a liquid crystal display panel. Because the lens is of the inner focus type, wherein either a single element of the second lens group, or such an element with additional elements of the second lens group that are shifted as a unit during focusing, the focusing mechanism can be small, simple, and fast. Specified conditions are satisfied to ensure that the projection lens is compact and yet has a sufficient back focus to enable other components to be inserted, is telecentric so as to provide an image that does not decrease in intensity at the periphery thereof and provides a bright image with well corrected aberrations.

REFERENCES:
patent: Re35310 (1996-08-01), Moskovich

Affiliated with

Also associated with

Rating

Projection lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-175231