In the early 1960s, due to the gyroscopes used in aerospace, the drums and disks used in computers, the polygonal prisms used in optical scanning, the large-diameter non-circular curved mirrors used in high-power laser nuclear fusion devices, and the infrared light of various complex shapes Stereo mirrors, etc., all kinds of mirrors and polygonal prisms require extremely high precision. The use of grinding, grinding, polishing and other methods for processing, not only the processing cost is high, but also it is difficult to meet the requirements of precision and surface roughness. To this end, the research and development of the use of high-precision, high-rigidity machine tools and diamond tools for cutting processing methods.