Variable illumination optical system

Details Variable illumination optical system Variable illumination optical system

1976-02-20

1978-01-03

Braun, Fred L.

Photocopying

Including fiber optics

355 4, 355 14, 355 69, G03G 1501, G03B 2776

Patent

active

040663515

ABSTRACT:
An optical system in which a screen modulates the light produced thereby. The intensity of the light image is varied as a function of screen position.

REFERENCES:
patent: 3120790 (1964-02-01), Carlson et al.
patent: 3580671 (1971-05-01), Lavander
patent: 3672759 (1972-06-01), Bauer
patent: 3815992 (1974-06-01), Ogawa
patent: 3936173 (1976-02-01), Kidd et al.
patent: 3961848 (1976-06-01), Turner

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