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Protected-silver coating for telescope primary mirrors prepared by downward thermal evaporation
Xu, Xu1,2; Liu, Hong-Xiang1; Li, Bin-Cheng1,3; Pei, Wen-Jun1
2016
发表期刊Guangzi Xuebao;Acta Photonica Sinica
ISSN1004-4213
卷号45期号:6页码:0631002
文章类型J
摘要By using a high-vacuum resistive heating evaporation coating machine with the materials evaporated downwards, the research of downward thermal evaporation for large-aperture optics was implemented. The silver coating was prepared at a high deposition rate by resistive heating tungsten filaments without splashing. The adhesion layer and protective layer were also thermally evaporated downwards with specially designed evaporation boats with Cr or CrNxas the adhesion layer and SiOxor SiOxNyas the protective layer. To evaluate the performance of the protected-silver coating, three kinds of protected-silver coatings were prepared and researched in details. The reflectance, cross-section morphology and environmental stability of the prepared coating samples were characterized. The results show that the coating with 3nmCr/120nmAg/0.6nmCrNx/150nmSiOxNystructure has good performances on environmental stability and spectral characteristics. Especially, it has an average reflectance of 97.8% in the 400~1800 nm spectral range, and passed the tests of 24-hour humidity (50/98% RH) and salt folg. © 2016, Science Press. All right reserved.
关键词Adhesion Coatings Deposition Rates Evaporation Film Preparation Reflection Resistive Evaporation Silver Thin Films Vacuum Applications Vacuum Evaporation
DOI10.3788/gzxb20164506.0631002
收录类别Ei
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ioe.ac.cn/handle/181551/8427
专题自适应光学技术研究室(八室)
作者单位1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu
2.610209, China
3. Graduate School of the Chinese Academy of Sciences, Beijing
4.100039, China
5. School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu
6.610054, China
推荐引用方式
GB/T 7714
Xu, Xu,Liu, Hong-Xiang,Li, Bin-Cheng,et al. Protected-silver coating for telescope primary mirrors prepared by downward thermal evaporation[J]. Guangzi Xuebao;Acta Photonica Sinica,2016,45(6):0631002.
APA Xu, Xu,Liu, Hong-Xiang,Li, Bin-Cheng,&Pei, Wen-Jun.(2016).Protected-silver coating for telescope primary mirrors prepared by downward thermal evaporation.Guangzi Xuebao;Acta Photonica Sinica,45(6),0631002.
MLA Xu, Xu,et al."Protected-silver coating for telescope primary mirrors prepared by downward thermal evaporation".Guangzi Xuebao;Acta Photonica Sinica 45.6(2016):0631002.
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