Half-tone picture recording device

Details Half-tone picture recording device Half-tone picture recording device

1981-04-28

1984-08-21

Faber, Alan

Facsimile and static presentation processing

Facsimile

Recording apparatus

358302, H04N 122

Patent

active

044673671

ABSTRACT:
A half-tone picture recording device with which half-tone images are accurately recorded. With the number of pulses applied during each sampling period being fixed, a light beam such as laser source is subjected to binary modulation and scanned on a photosensitive material to record the image of a half-tone picture thereon. Input signal levels representing the picture to be recorded are converted into a number of pulses for each sampling period by representing numbers of pulses to be applied during any particular sampling period with these values determined in accordance with output density levels with input signal levels, necessary exposure with output density levels, and pulse numbers with necessary exposure.

REFERENCES:
patent: 3197558 (1965-07-01), Ernst
patent: 4001492 (1977-01-01), Suzuki
patent: 4028732 (1977-06-01), Salter
patent: 4080634 (1978-03-01), Schreiber
patent: 4375064 (1983-02-01), Ohara

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