Laser recorder

Details Laser recorder Laser recorder

1981-04-22

1982-08-31

Hix, L. T.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

358298, G01D 1514

Patent

active

043475230

ABSTRACT:
A laser recorder using a semiconductor laser which is capable of reproducing an image such as a picture having half-tones with high quality. An input signal is sampled and converted to a digital number which is used to address a read-only memory in which is stored pulse numbers with corresponding pulse width selection numbers. The outputs of the read-only memory are compared with the output of a counter circuit to determine the number of pulses which are applied to a laser beam modulator. A plurality of modulating pulses are produced, each having a different width. One of these is selected as the modulating signal in accordance with the selection bits stored in the read-only memory.

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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