Oblique projection optical system

Details Oblique projection optical system Oblique projection optical system

1996-07-03

1998-01-20

Dowling, William

Optics: image projectors

Distortion compensation

For projection axis inclined to screen

353 69, G03B 2114

Patent

active

057094454

ABSTRACT:
An optical system projects an enlargement of an image of an object surface on a screen inclined relative to the object surface. The optical system includes an afocal first lens unit including a diaphragm and at least a second lens unit. The optical axis of the afocal system is not collinear with a normal line from the object surface, i.e., the afocal system is eccentric to the object surface. The second lens unit is eccentric relative to the afocal lens unit.

REFERENCES:
patent: 5032022 (1991-07-01), Sato et al.
patent: 5096288 (1992-03-01), Yano et al.
patent: 5220363 (1993-06-01), Sato et al.
patent: 5274406 (1993-12-01), Tejima et al.
patent: 5302983 (1994-04-01), Sato et al.
patent: 5422691 (1995-06-01), Ninomiya et al.
patent: 5442413 (1995-08-01), Tejima et al.

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