Method and apparatus for producing wells in the surface of a rotogravure cyclinder with a laser
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United States of America Patent
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Jan 5, 1999
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N/A
app pub date -
Dec 20, 1996
filing date -
May 3, 1995
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Abstract
A method and a device for particularly rapidly producing wells (18) in the surface of a rotating rotogravure cylinder (2) by a pulsed laser beam (13), which is deflected and directed via an optical lens (7) onto the surface of the rotogravure cylinder (2) to be processed. The power of a single laser beam pulse is adjusted in such a way that it is sufficient for removing the maximum volume needed for a well (18). Furthermore, the laser beam (13) is deflected by an optoacoustic modulator (8) by diffraction onto the optical axis of the lens (7), and the individual laser beam pulses are controlled in their pulse power by the same modulator (8) in accordance with the volumes of the wells to be formed.
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