Directional diffusing screen

Details Directional diffusing screen Directional diffusing screen

1981-06-03

1983-02-08

Arnold, Bruce Y.

350331R, G02B 532

Patent

active

043726399

ABSTRACT:
A method and apparatus for presenting real-time information for viewing is disclosed wherein a projection lens projects an image of a liquid crystal display onto the surface of a holographic optical element diffuser. The liquid crystal display is driven so as to contain real-time information and is illuminated by substantially monochromatic light. The diffuser diffracts the real-time information to a pupil at a viewing focal plane with preselected illumination intensity so that the real-time information can be viewed in diffuse form anywhere across the pupil.

REFERENCES:
patent: 3619021 (1971-11-01), Biedermann
patent: 3708217 (1973-01-01), McMahon
patent: 3901578 (1975-08-01), Hudson
patent: 3909111 (1975-09-01), Meyerhofer
patent: 3915548 (1975-10-01), Opittek et al.

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