Spatially selective optical system

Details Spatially selective optical system Spatially selective optical system

1974-09-16

1976-07-20

Hix, L. T.

Photocopying

Including fiber optics

96 27E, 96 44, 96 90PC, 350160P, 355 8, 355 11, 355 71, G03G 15052

Patent

active

039703827

ABSTRACT:
An optical system in which a light image of an original document is filtered to form a single color light image which is transmitted through a photochromic filter. The photochromic filter is responsive to the intensity of the single color light image to automatically regulate the intensity of the single color light image transmitted therethrough.

REFERENCES:
patent: 3083614 (1963-04-01), Veit
patent: 3085469 (1963-04-01), Carlson
patent: 3105761 (1963-10-01), Foris
patent: 3260152 (1966-07-01), Aston
patent: 3270639 (1966-09-01), Windsor
patent: 3438704 (1969-04-01), Schoen
patent: 3454778 (1969-07-01), Eisner
patent: 3722998 (1973-03-01), Morse
patent: 3775006 (1973-11-01), Hartman et al.
patent: 3779640 (1973-12-01), Kidd

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