A system structure of digital Computer-to-Plate is proposed. The multi-beam laser scanning imaging system

based on the data unit segmentation

is designed through analysis of the key technologies. The model of dynamic control of laser beam is established. The focusing optics with low distortion is designed. High-power laser modulator with rate up to 1 Mbit/s per beam is realized with the designed and fabricated grating light valve modulator. Therefore output intensity of multi-channel laser beam is stable and consistent. The dynamic feedback compensation circuit based on mechanical movement is proposed

which adjust scanning data rate adaptively. The consistency of plate scanning speed

the uniformity of pixel gray

the consistency of pixel size and pixel distance are ensured by using of adaptive compensation circuit technology. The laser Computer-to-Plate system with high-resolution

pixel reduction rate and repeatability is realized.