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How The Platesetter Works
- Dec 26, 2018 -

A single beam of raw laser generated by a laser is split into multiple beams (usually 200-500 beams) by a multi-channel optical fiber or a complex high-speed rotating optical splitting system. Each beam of light is separately pressed by an acousto-optic modulator. The characteristics of the brightness and darkness of the image information in the computer, after modulating the light and dark changes of the laser beam, become a controlled beam. After focusing, hundreds of micro-lasers directly hit the surface of the plate for engraving work, and after scanning the engraving, a latent image of the image is formed on the printing plate. After development, the image information on the computer screen is restored on the printing plate for direct printing by the offset printing machine. The diameter of each microlaser beam and the shape of the light intensity distribution of the beam determine the sharpness and resolution of the latent image that forms the image on the plate. The smaller the spot of the micro-beam, the closer the intensity distribution of the beam is to the rectangle (ideally), the higher the definition of the latent image.