Image projection device with suppressed moire

Details Image projection device with suppressed moire Image projection device with suppressed moire

1995-05-24

1996-12-03

Dowling, William

Optics: image projectors

Distortion compensation

353 38, G03B 2100

Patent

active

055801447

ABSTRACT:
The invention relates to an image projection device. This device comprises an illumination system having a lamp for supplying an illumination beam, at least one image display panel for modulating the illumination beam in accordance with an image to be projected to a signal beam, and a projection lens system for projecting the image on a projection screen. To suppress Moire interference between the structure of the image projection screen and the image display panel, an optically transparent beam-displacing element is arranged at an angle with respect to the signal beam axis in at least a portion of the signal beam in the light path between the image display panel and the projection screen at a position where a lamp image is present.

REFERENCES:
patent: 4573764 (1986-03-01), Bradley
patent: 4940881 (1990-07-01), Sheets
patent: 5005968 (1991-04-01), Tejima et al.
patent: 5060058 (1991-10-01), Goldenberg et al.
patent: 5084807 (1992-01-01), McKechnie et al.
patent: 5098184 (1992-03-01), van den Brandt et al.
patent: 5250967 (1993-10-01), Miyashita

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