Contrast control for lens

Details Contrast control for lens Contrast control for lens

1987-11-30

1989-03-28

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

G03B 2772

Patent

active

048168769

ABSTRACT:
A device and method of controlling the amount of flare or veiling glare in an imaging system by the simple addition of light scattering element. The amount of flare or veiling glare that is produced in the optical path is variable to determines the degree of contrast loss and thus the final contrast of the image.

REFERENCES:
patent: 2672799 (1954-03-01), Terwilliger
patent: 3040644 (1962-06-01), Hearther
patent: 3941475 (1976-03-01), Sheets
patent: 4257086 (1981-03-01), Gulliksen
patent: 4290692 (1981-09-01), Svatek

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