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	Coating the 2-m level primary mirror with protected aluminum
	Pei, Wenjun1; Liu, Hongxiang1; Du, Weichuan1,2
	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
卷号	8415
页码	841517
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
ISSN号	0277786X
内容类型	会议论文
源URL	[http://ir.ioe.ac.cn/handle/181551/7857]
专题	光电技术研究所_薄膜光学技术研究室（十一室）
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
推荐引用方式 GB/T 7714	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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