CNC machining; design, processing, assembly and inspection, etc. The main processing method of the module cavity is CNC machining, which can be precisely cut and processed through computer-controlled machine tools. It has the characteristics of high precision and high efficiency, and can meet the processing requirements of the module cavity; the process route includes design, processing, assembly and Inspection and other steps are to design the structure of the cavity according to the application requirements, and then perform cutting processing. Commonly used cutting methods include mechanical cutting, laser cutting, ultrasonic cutting, etc.; assembly and preparation of the cavity according to the design requirements require strict control of the processing parameters. , to ensure its accuracy; finally, cleaning and inspection are required. The inspection mainly includes inspection of size, shape and optical performance to ensure the quality and performance of the cavity.