Scan device with light mixer and diffusing means for half-tone t

Details Scan device with light mixer and diffusing means for half-tone t Scan device with light mixer and diffusing means for half-tone t

1986-09-18

1988-04-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356444, H01J 516, H01J 4014, G01N 2100

Patent

active

047360992

ABSTRACT:
An apparatus for scanning a transparency image original wherein scattered light emerging from the original is guided through lens or diffraction gratings onto a diffusion screen attached to a light mixer. In the light mixer, the light is mixed by multiple reflection and, at a light exit of the mixer, is guided to a cross-sectional transducer formed of a plurality of optical fibers. These fibers conduct the light onto a photoelectric transducer. The apparatus works with high efficiency and reduces an image falsifying influence of the Callier effect to such a degree that it no longer has a disturbing appearance in reproduction.

REFERENCES:
patent: 4260899 (1981-04-01), Baker
patent: 4265545 (1981-05-01), Slaker
patent: 4277178 (1981-07-01), Cushing et al.
patent: 4367047 (1983-01-01), Ikin

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