Projection lens system

Details Projection lens system Projection lens system

1994-12-28

1999-07-20

Nguyen, Thong

Optical: systems and elements

Image stabilization

By movable refractive structure

359554, G02B 2764

Patent

active

059263164

ABSTRACT:
A varifocal projection lens system comprising a first lens group of a positive refractive power that is provided closer to a screen, and a second lens group of a positive refractive power that is fixed in a position closer to an image field. To adjust projection of an image displayed by the display device onto the screen, the first lens group is moved and tilted with respect to the optical axis of the second lens group. The projection lens system also satisfies the expression 0.01<D/fw<0.5 where f2 is the focal length of the entire system at the wide-angle end, and D is the distance between the front lens surface of the second lens group and the image field.

REFERENCES:
patent: 4387970 (1983-06-01), Brueggemann
patent: 4564269 (1986-01-01), Uehara
patent: 4771302 (1988-09-01), Hamada et al.
patent: 4909615 (1990-03-01), Ueda
patent: 4978205 (1990-12-01), Sato
patent: 5000549 (1991-03-01), Yamazaki et al.
patent: 5096288 (1992-03-01), Yano et al.
patent: 5168403 (1992-12-01), Omeda et al.
patent: 5245478 (1993-09-01), Luecke
patent: 5249079 (1993-09-01), Umeda
patent: 5592331 (1997-01-01), Eastcott
patent: 5623364 (1997-04-01), Morooka

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