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题名:
Coating the 2-m level primary mirror with protected aluminum
作者: Pei, Wenjun1; Liu, Hongxiang1; Du, Weichuan1,2
出版日期: 2012
会议名称: Proceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
会议日期: 2012
DOI: 10.1117/12.966816
通讯作者: Pei, W.
中文摘要: In order to evaporate the Ø2.4m large-scale speculum, we have developed a high-vacuum resistance evaporation machine which is of the nation's largest bell-type, and we first propose to use the structure of the protected-Al coating with SiO coating by evaporating from top to bottom. The results show that the non-uniformity of aluminum coating is no more than 5.17% within 1.8 meters in diameter, also after environmental testing, there is no change on the mirror surface, and the reflectance decreased less than 1%. The average of the speculum reflectivity is Rav>88%@350nm-1800nm and Rav>90%@ 400nm-2500nm.We have separately completed the Ø 1.8m plane mirror in April 2011 and the Ø 1.8m concave mirror in October 2011. The results show that the PV value is less than λ/10 after evaporation and the RMS value has no change. © 2012 SPIE.
英文摘要: In order to evaporate the Ø2.4m large-scale speculum, we have developed a high-vacuum resistance evaporation machine which is of the nation's largest bell-type, and we first propose to use the structure of the protected-Al coating with SiO coating by evaporating from top to bottom. The results show that the non-uniformity of aluminum coating is no more than 5.17% within 1.8 meters in diameter, also after environmental testing, there is no change on the mirror surface, and the reflectance decreased less than 1%. The average of the speculum reflectivity is Rav>88%@350nm-1800nm and Rav>90%@ 400nm-2500nm.We have separately completed the Ø 1.8m plane mirror in April 2011 and the Ø 1.8m concave mirror in October 2011. The results show that the PV value is less than λ/10 after evaporation and the RMS value has no change. © 2012 SPIE.
收录类别: Ei
语种: 英语
卷号: 8415
ISSN号: 0277786X
文章类型: 会议论文
页码: 841517
Citation statistics:
内容类型: 会议论文
URI标识: http://ir.ioe.ac.cn/handle/181551/7857
Appears in Collections:薄膜光学技术研究室(十一室)_会议论文

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作者单位: 1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
2. Graduate School, Chinese Academy of Sciences, Beijing 100039, China

Recommended Citation:
Pei, Wenjun,Liu, Hongxiang,Du, Weichuan. Coating the 2-m level primary mirror with protected aluminum[C]. 见:Proceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes. 2012.
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