摘要:
Images are transferred to printing plates by illuminating light-responsive materials with patterns corresponding to the images to be printed. The present invention provides for the transferring of an image by the combined flux from two or more beams of light. Particular embodiments ablate the mask printing plates for CTP systems by the combined illumination from a first, broad beam and a plurality of controllable, pulsed beams that co-illuminate the plate with the first beam. The resulting system and method is less expensive than the prior art and produces a printing plate more efficiently and with improved productivity than the prior art.
摘要:
A method and apparatus that provide multichannel imaging and that allow using diffraction-limited optics. The imaging apparatus includes a laser beam source to generate single-mode laser beam of energy, a multichannel spatial light modulator (SLM) accepting a plurality of modulating signals, and a beam multiplier between the radiation source and the SLM. The beam multiplier accepts the beam generated by the source and generates from that beam a plurality of beams directed onto the SLM. The beams from the beam multiplier illuminate the active region of the SLM such that the SLM generates a plurality of modulated beams modulated according to the modulating signals. The apparatus further includes an optical subsystem located between the SLM and an imaging plane that includes at least one optical element to focus the modulated beams onto an imaging plane. A recording medium sensitive to imaging radiation from the source is placed at the imaging plane. The recording medium is capable of being permanently marked in response to incidence of such imaging radiation. The beams generated by the SLM are each substantially a single-mode beam such that the first optical subsystem may be designed using diffraction-limited optics.
摘要:
Images are transferred to printing plates by illuminating light-responsive materials with patterns corresponding to the images to be printed. The present invention provides for the transferring of an image by the combined flux from two or more beams of light. Particular embodiments ablate the mask printing plates for CTP systems by the combined illumination from a first, broad beam and a plurality of controllable, pulsed beams that co-illuminate the plate with the first beam. The resulting system and method is less expensive than the prior art and produces a printing plate more efficiently and with improved productivity than the prior art.
摘要:
A method of exposing imaging data (542) onto a sensitized medium (550) including exposing K sets (380, 480) of N of tracks (1, 2, 3, 4) onto the medium according to a corresponding part of imaging data, each successive set being a pixel distance apart in a fast scan direction (301, 401). The method further includes exposing L sets (390, 490) of N tracks onto the medium with an offset of M pixels in a slow scan direction (302, 402) substantially perpendicular to the fast scan direction, according to a second corresponding part of imaging data. The method includes repeating alternately exposing K sets and L sets of N tracks until the complete medium is exposed along the fast scan direction. During or after the alternately exposing K sets and L sets, there is progression in the slow scan direction such that after exposing the complete length of N tracks of exposed pixels, the next N tracks match along the medium at the start of the next N tracks.
摘要:
A method of exposing imaging data (542) onto a sensitized medium (550) including exposing K sets (380, 480) of N of tracks (1, 2, 3, 4) onto the medium according to a corresponding part of imaging data, each successive set being a pixel distance apart in a fast scan direction (301, 401). The method further includes exposing L sets (390, 490) of N tracks onto the medium with an offset of M pixels in a slow scan direction (302, 402) substantially perpendicular to the fast scan direction, according to a second corresponding part of imaging data. The method includes repeating alternately exposing K sets and L sets of N tracks until the complete medium is exposed along the fast scan direction. During or after the alternately exposing K sets and L sets, there is progression in the slow scan direction such that after exposing the complete length of N tracks of exposed pixels, the next N tracks match along the medium at the start of the next N tracks.