| Φ520mmF/1.6椭球面反射镜加工 |
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| 引用本文： | 李新南,袁吕军,刘星涛,夏自立.Φ520mmF/1.6椭球面反射镜加工[J].光学技术,2004,30(5):619-622. |
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| 作者姓名： | 李新南 袁吕军 刘星涛 夏自立 |
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| 作者单位： | 中国科学院国家天文台南京天文光学技术研究所,南京,210042 |
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| 摘 要： | 介绍了一块Φ520mm大相对孔径(F/1.6)轻量化椭球面反射镜的加工与检测方法。镜面的有效口径为Φ502mm,顶点曲率半径为1600mm,非球面系数k=-0.9663,面形精度要求优于0.025λ(RMS)。镜子背面有54个大小深浅不一的不通孔,用于减轻镜子的重量。采用WYKO干涉仪检测得到镜面面形误差达RMS0.02λ,λ=632.8nm。
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| 关 键 词： | 大口径强光力非球面 轻量化反射镜 光学加工 光学检测 |
| 文章编号： | 1002-1582(2004)05-0619-04 |
| 修稿时间： | 2003年11月7日 |
Manufacturing of the Φ520mm F/1.6 ellipsoid mirror |
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| LI Xin-nan,YUAN Lu-jun,LIU Xing-tao,XIA Zi-li.Manufacturing of the Φ520mm F/1.6 ellipsoid mirror[J].Optical Technique,2004,30(5):619-622. |
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| Authors: | LI Xin-nan YUAN Lu-jun LIU Xing-tao XIA Zi-li |
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| Abstract: | The method of manufacturing and testing for an ellipsoid mirror with Φ520mm diameter are discussed. The parameters of the mirror are as follows: clear aperture is Φ502mm, radius of curvature is 1600mm, conic constant k=-0.9663, requirement of surface accuracy is λ/40(RMS)at λ=632.8nm. In order to reduce the weight of the mirror, 54 blind holes with different diameter are drilled from its back surface and the depth are matched the outline of the front-surface. Finally surface accuracy 0.02λ(RMS)is demonstrated by using the WYKO phase-shifting interferometer. |
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| Keywords: | fast F-ratio aspheric mirror light-weighted mirror optical manufacturing optical testing |
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