Projection apparatus

Details Projection apparatus Projection apparatus

1990-09-21

1992-03-17

Cuchlinski, Jr., William A.

Optics: image projectors

Distortion compensation

353 30, 353101, 352114, 359196, G03B 2114

Patent

active

050962884

ABSTRACT:
A projection display apparatus, which projects a magnified image onto a screen, comprises an image forming system, such as a display panel, a projector including a plurality of lenses for projecting the image onto the screen, and a decentering mechanism for decentering some lenses in the projector with respect to the optical axis. Even if the image is distorted by arrangement of the screen and the optical axis and so on, the distortion is compensated by decentering the lenses and producing a decentering distortion.

REFERENCES:
patent: 1199460 (1916-09-01), Featherstone
patent: 2465835 (1949-03-01), Becote
patent: 2795996 (1957-06-01), Saver
patent: 3071875 (1963-01-01), Herstreet
patent: 3253505 (1966-05-01), Miller
patent: 3262359 (1966-07-01), Carpenter
patent: 3597059 (1971-08-01), Gopfert
patent: 3963337 (1976-06-01), Lundberg
patent: 4089599 (1978-05-01), Kuboshima
patent: 4482224 (1984-11-01), Johansson

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