Against the experiment modeling of removing function in computer control optical surfacing, the removing function extracting algorithm was researched in this paper.First, XYZ format file of interferometry was analyzed and corresponding data structure was designed.Then, removing function extracting algorithm was studied.Principle error in the algorithm was analyzed and solving method of trimming error was given.Not only the qualitative extracting algorithm, but also the quantitative algorithm was given, which includes three qualifications of removing function.At last, testing experiment was design, and removing function extracting and quantitative calculation was given.The algorithm described in this paper could be used in extracting removing function and optimizing dwell time solving.%针对计算机控制光学表面成形技术中去除函数的实验法建模问题,研究了抛光工艺中去除函数的提取算法.首先,对干涉检验得到的XYZ格式数据文件进行解析并针对其特点设计了相应的数据结构；然后,研究了去除函数的提取算法,并在此基础上研究了提取算法存在的误差以及降低误差的处理办法.在对去除函数的定性提取外,定量计算了去除函数的三个技术指标；最后,进行了去除函数测试实验并利用本文所述的提取算法进行去除函数提取及定量计算.本文所述算法可以用于去除函数的实验法建模并用于驻留时间的优化求解过程.
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