Different from galvanometer control technology, polygon laser scanner has rotary mirror which adopts advanced bearing and spindle design, rotating speed up to 50,000 RPM, scanning rate over 100 KHz, scanning speed up to 512 m/s (1600 lines/s) and makes ultra-fast and ultra-cutting-edge scanning applications possible. Brushless DC motor and servo system combined to provide excellent performance and reliability, speed stability < 0.05%. Based on FPGA and DSP high-speed digital processing technology and scanning galvanometer core control algorithm. The application of high-resolution micro grating encoder is mostly used in high energy and high pulse frequency laser application scenarios.