Plate Principle

The single original laser beam generated by laser, multi channel optical fiber optical crack or complex of spinning beam split into multiple (usually 200-500 bundle) very thin laser beam through acousto-optic modulator characteristics such as light and dark image information in a computer, to modulated laser beams of light and dark, controlled beam. Through focused, hundreds of micro-laser engraved directly down onto the surface of the printing plate, passed after the block, and form an image of the latent image on the plate. Developed, restore the image on a computer screen available to offset direct printing plates. Each micro-laser beam diameter and intensity distribution of laser beam shape, decided to form an image on a plate of the latent image definition and resolution. Smaller spot of light beams, beam intensity distribution of the closer the rectangle (ideal), the higher the sharpness of the image. Scan accuracy depends on mechanical and electronic control parts of the system. Laser micro-beam number determines the length of time. Number of light beams more shorter time etching a printing plate. At present, the beam has grown to 4.6 microns in diameter, equivalent to etching a printing accuracy of 600lpi. Beam number up to 500. Outside the Eclipse a printed version will be completed in 3 minutes. The other hand, the output power and energy density of the beam (laser energy produced per unit area, expressed in joules per square centimeter) high, the etch rate is also faster. But too much power will also shorten the working life of the laser, and reduce the negative impact of distribution of beam quality.