Manufacturing and testing of rectangular off-axis aspheric mirror with double-swing polishing method
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摘要: 介绍了一种轻质矩形离轴非球面反射镜的加工与检测方法.针对矩形离轴非球面镜这种直角效应的加工难点,提出双摆式加工工艺,并设计改造双摆式加工机床使该方法得以实现.采用该方法加工完成某多光谱仪光学系统中4块矩形离轴非球面反射镜(其中最大尺寸为266 mm110 mm),最终加工得到的面形精度均优于0.020(RMS, @633 mm)的设计指标要求.加工结果表明,用该加工技术既提高了光学加工效率又利于得到较为平滑的面形质量.Abstract: A kind of manufacturing and testing method for rectangular off-axis aspheric lightweight mirror is introduced. In order to overcome the corner effect, double-swing polishing(DSP) method is proposed. A DSP machine is made to achieve satisfying manufacturing result. The DSP and the 4-pole method are successfully applied for manufacturing optical system in the spectrometer. Four rectangular off-axis aspheric mirrors with the largest size of 266 mm110 mm are polished, and the final surface precision figures are better than 0.020(RMS, @633 nm). Manufacturing result shows that the double-swing polishing method improves the polishing efficiency and reduces the optical surface medium frequency error.
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Key words:
- optical manufacture /
- off-axis aspheric surface /
- double-swing /
- 4-pole method
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