Research On New Principle Of Processing Large-diameter & High-order Aspheric Optical Parts With Rotary Tangent Method

Aspheric optical part processing is an acknowledged difficult problem around the world. In order to solve the problem of difficult processing and high cost in machining aspheric optical part, a new principle of processing high order aspheric optical part with tangent rotation method is put forward in this paper.The processing principle of tangent rotation method is applicable of processing spherical, quadratic and higher-order aspheric optical parts. The paper focuses on researching the principle of processing large aspheric parts. Firstly, the theoretical accuracy of the principle is analised. Secondly, based on the accuracy analyse, the structure of the machine tool for processing large-diameter(φ250-400mm) aspheric parts is designed. Lastly, the hard and soft-ware of the machine's control system is designed. All of the researches have laid the theoretical foundation for the future work.According to the above study, we can draw the conclusions that the new principle of tangent rotation method processing large-diameter aspheric optical part is correct and feasible. This method can improve the high-order and large-diameter aspheric optical parts processing efficiency, especially, it can greatly reduce the cost.