Variable power projection lens

Details Variable power projection lens Variable power projection lens

1993-09-14

1996-04-02

Sikes, William L.

Optical: systems and elements

Lens

With variable magnification

359676, 359686, G02B 1514

Patent

active

055046258

ABSTRACT:
A variable power projection lens is provided and includes, in order from an magnifying side (a screen side), a first lens group having positive power, a second lens group having negative power, a third lens group having positive power, and a fourth lens group having positive power. At least two lens groups of the first, second, and third lens groups are movable along the optical-axis direction to vary the image magnification and to focus, and the variable power projection lens satisfies the following condition:

REFERENCES:
patent: 4690513 (1987-09-01), Takahashi et al.
patent: 4854684 (1989-08-01), Horiuchi
patent: 4913540 (1990-04-01), Minefuji
patent: 4981352 (1991-01-01), Tejima et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2020745