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Alternative TitleStudy of protective layer for 2.4 m telescope's al coating
伦宝利; 秦松年; 王建国; 刘忠
Source Publication中国激光(Zhongguo Jiguang/Chinese Journal of Lasers)
Contribution Rank第1完成单位
Indexed ByEI ; CSCD
Keyword薄膜 保护膜 铝反射膜 脱膜 天文主镜
Other AbstractThe technology for coating protective dielectric layer to 2.4 m telescope's aluminium coating is studied using the large vacuum evaporation coating machine ZZS3200, which is the first vacuum evaporation chamber evaporating materials from top to bottom in China. According to the profile of 2.4 m telescope's primary mirror and the geometry of ZZS3200, the uniformity of the dielectric layers is analyzed and a moly boat source for evaporating materials from top to bottom is designed. The result shows that the index of evaporation characteristics is approximate to 1, and the non-uniformity of the dielectric film on 2.4 m mirror is less than 13.6%.comparing the effect of removing the old protected aluminium coating, it is found that, compared with the SiO2-protected coating, MgF2-protected coating is easier to be removed, which can decrease the erosion of mirror during the coating removal, and has higher speculum reflectivity. The 2.4 m telescope's mirror aluminium coating with MgF2-protected layer is completed. The reflectivity of witness sample is 87.16% in the wavelength range of 350~1100 nm, and the limiting magnitude is not less than 23.5 magnitude.
Funding Organization国家自然科学基金(11003042)
Subject Area天文学
Archive Date2014-04-25
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Document Type期刊论文
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GB/T 7714
伦宝利,秦松年,王建国,等. 2.4m望远镜铝反射镜介质保护膜的研究[J]. 中国激光(Zhongguo Jiguang/Chinese Journal of Lasers),2013,40(9):162-166.
APA 伦宝利,秦松年,王建国,&刘忠.(2013).2.4m望远镜铝反射镜介质保护膜的研究.中国激光(Zhongguo Jiguang/Chinese Journal of Lasers),40(9),162-166.
MLA 伦宝利,et al."2.4m望远镜铝反射镜介质保护膜的研究".中国激光(Zhongguo Jiguang/Chinese Journal of Lasers) 40.9(2013):162-166.
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