红外技术, 2015, 37 (2): 119, 网络出版: 2015-03-23
金属非球面反射镜的加工和检测技术
Manufacturing and Test Technology for Metal Aspherical Reflector
摘要
金属反射镜是空间和军用红外光学系统中关键元件之一,分析了适用于空间光学系统反射镜的主要材料,指出了铝合金作为反射镜材料的优点与缺陷,介绍了用 SPDT加工铝合金反射镜的方法,以及反射镜的镀膜和检测技术,并完成了口径为 235 mm的铝合金非球面反射镜的加工,用 Zygo干涉仪进行面形检测,其面形精度达到 RMS 0.13.(.＝632.8 .m),镀膜后用红外傅里叶光谱仪检测,在红外中波波段(3.7～4.8 .m)反射率大于 99%.
Abstract
Metal reflector is one of the key elements in aerospace and IR optical systems.In this paper,the materials used in aerospace reflector were analyzed,and the advantages and disadvantages were pointed out.The manufacturing method of aluminum alloy reflectors by SPDT was also introduced,which included coating and testing.By this method,an aluminum aspherical reflector with a diameter of 235 mm was manufactured.The reflector was measured by Zygo interferometer and FTIR Spectrometer.The results show that the form accuracy is RMS 0.13.(.＝632.8 .m) and the reflectance is more than 99% from 3.7 .m to 4.8 .m waveband after coating.
谢启明, 杨静, 徐放, 肖建国, 李刚, 木锐, 杨彦辉, 张若寅, 张万清, 田湫. 金属非球面反射镜的加工和检测技术[J]. 红外技术, 2015, 37(2): 119. XIE Qi-ming, YANG Jing, XU Fang, XIAO Jian-guo, LI Gang, MU Rui, YANG Yan-hui, ZHANG Ruo-yin, ZHANG Wan-qing, TIAN Qiu. Manufacturing and Test Technology for Metal Aspherical Reflector[J]. Infrared Technology, 2015, 37(2): 119.
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