Review on ultra-precision bonnet polishing technology

With the development of science and technology, in the fields of national defense, aerospace, medical treatment, automobile, and so on, the demands for ultra-precision parts and molds with complex surfaces such as aspheric or free-form surface are becoming more and more common and demanding. Bonnet polishing technology, which uses a new polishing tool and special form of motion, is a high-precision and high-efficiency optical component processing method. This method is especially suitable for the processing of aspherical and free-form surfaces and has broad application prospects. This paper first introduced the basic principle and development process of bonnet polishing technology. Then the key technology and its state-of-the-art bonnet polishing technology were analyzed. Finally, the development of bonnet polishing technology was summarized and prospected.