Screened optical system

Details Screened optical system Screened optical system

1974-09-18

1976-07-06

Hix, L. T.

Photocopying

Including fiber optics

355 67, 355 71, G03G 1522

Patent

active

039678946

ABSTRACT:
An optical system in which a continuous tone light image of an original document is formed. The optical system is arranged to illuminate the original document and to create a finely divided uniformly distributed light image. A selectable feature therein permits the formation of light images having differing tone gradations.

REFERENCES:
patent: 1676600 (1928-07-01), Capstaff
patent: 2444512 (1948-07-01), Kath
patent: 2643187 (1953-06-01), Linzell
patent: 3120790 (1964-02-01), Carlson et al.
patent: 3517596 (1970-06-01), Johnson et al.
patent: 3580671 (1971-05-01), Lavander
patent: 3603672 (1971-09-01), Bastide

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