Half-tone reproduction method employing overlapping scan lines
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United States of America Patent
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Aug 30, 1988
Grant Date -
N/A
app pub date -
May 21, 1987
filing date -
May 30, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of generating a half-tone representation of an image from digital data defining the color content of pixels arranged in a series of substantially parallel, overlapping input scan lines comprises exposing at least one record medium to an exposing beam in a series of substantially parallel, overlapping output scan lines each corresponding to a respective input scan line. The exposing beam is modulated under the control of the digital data and half-tone information. The intensity of the exposing beam, which typically includes a number of subsidiary beams, is such that an area of the record medium will only record a half-tone dot or a portion of a half-tone dot after all output scan lines passing through that area have been exposed.
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