Projection lens system

Details Projection lens system Projection lens system

1993-06-24

1995-04-04

Sugarman, Scott J.

Optical: systems and elements

Lens

With field curvature shaping

359708, 359713, G02B 1318

Patent

active

054042461

ABSTRACT:
A projection lens system has a first lens to a sixth lens which are serially arranged in this order from a screen side. The first lens has a meniscus configuration in which a convex surface is directed toward the screen side and the power of the lens changes from positive to negative from the optical axis toward a peripheral portion of the lens. The first lens has two aspherical surfaces. The second lens has a positive power meniscus configuration in which a convex surface is directed toward the screen side. Both surfaces of the second lens are aspherical. The third lens has a positive power meniscus configuration in which a convex surface is directed toward the screen side. The fourth lens is disposed close to the third lens and has two convex surfaces. The fifth lens has a positive power meniscus configuration in which a concave surface is directed toward the screen side. Both surfaces of the fifth lens are aspherical. The sixth lens has a concave surface which has a large curvature directed toward the screen side. The surface of the sixth lens on the screen side is aspherical.

REFERENCES:
patent: 4300817 (1981-11-01), Betensky
patent: 4776681 (1988-10-01), Moskovich
patent: 5130850 (1992-07-01), Toide
patent: 5148320 (1992-09-01), Toide

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2383485