Laser recorder

Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means

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Details

358298, G01D 1514

Patent

active

044045700

ABSTRACT:
A laser recorder device in which many levels of half-tone densities are accurately produced with smooth transitions between areas of different densities. An input signal is sampled with a sampling pulse in response to which digital output values of a predetermined function of the input signal are produced. Pulses are applied to a semiconductor laser beam source with the number and frequency of the pulses during a preset application time being determined in accordance with the magnitude of the input signal.

REFERENCES:
patent: 3725574 (1973-04-01), Gast
patent: 4001492 (1977-01-01), Suzuki et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 3, "Adaptive Contrast Ranging for Images", Wong, Aug. 1975, pp. 914-917.

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