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In recent years , non - spherical lens with its compact system structure , improve image quality , excellent performance , more and more applications in a variety of precision instruments , which requires aspheric CNC machining high precision , fast , mass production . Computer control theory and Preston principle , drawing on the traditional process , ground into a type of aspherical CNC milling process , the process parameters of the polishing process and device . Fix the milling process parameters and error ; using the large diameter elastic modulus gadget correction method of combining polishing ; introduction of feedback compensation to address the destruction of the elastic modulus polishing opposite shape precision milling ; gadget , characterized the removal function , dwell time and face shape adjustment factor derivation ; simulation process . The experiment , Φ64mmZF6 of aspheric surface accuracy of 0.4um, surface finish grade Ⅲ , short processing cycle, high repetition accuracy, mass production has aspherical elements to promote meaningful .
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