Projection lens

Details Projection lens Projection lens

1998-02-17

2000-03-07

Sugarman, Scott J.

Optical: systems and elements

Lens

With field curvature shaping

359716, G02B 912, G02B 1318

Patent

active

060348240

ABSTRACT:
A projection lens for projecting, on a projection screen, an enlargement of an image appearing on a cathode ray tube (CRT) corrects for optical aberrations by minimizing the number of lens elements, and can be manufactured at low cost. The projection lens includes, successively from an image side to an object side, a first lens group comprising a single lens element of generally positive meniscus shape, a second lens group comprising a single positive lens element, a field stop, and a third lens group having a concave surface facing the image side.

REFERENCES:
patent: 4300817 (1981-11-01), Betensky
patent: 4348081 (1982-09-01), Betensky
patent: 4526442 (1985-07-01), Betensky et al.
patent: 4685774 (1987-08-01), Moskovich
patent: 4697892 (1987-10-01), Betensky
patent: 4776681 (1988-10-01), Moskovich
patent: 4801196 (1989-01-01), Betensky
patent: 4948237 (1990-08-01), Hirata et al.
patent: 5633757 (1997-05-01), Park

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-368675