Photographic strobe apparatus

Details Photographic strobe apparatus Photographic strobe apparatus

1979-07-06

1981-09-22

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

315241P, 315151, 315171, G03B 2772, H05B 3702

Patent

active

042906920

ABSTRACT:
A strobe apparatus for reducing contrast index in photographic copies by employing an illumination pulse of short duration includes a source energizable at both a relatively high level to provide high intensity illumination and at a low level to provide low intensity illumination.

REFERENCES:
patent: 3033988 (1962-05-01), Edgerton
patent: 3065667 (1962-11-01), Edgerton
patent: 3438766 (1969-04-01), Biber
patent: 3813158 (1974-05-01), Zahn et al.
patent: 4151446 (1979-04-01), Ludloff
Kompendium der Photographie.

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