IOE OpenIR  > 薄膜光学技术研究室(十一室)
Coating the 2-m level primary mirror with protected aluminum
Pei, Wenjun1; Liu, Hongxiang1; Du, Weichuan1,2; Pei, W.
Volume8415
Pages841517
2012
Language英语
ISSN0277786X
DOI10.1117/12.966816
Indexed ByEi
Subtype会议论文
AbstractIn 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.; 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.
Conference NameProceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Conference Date2012
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Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7857
Collection薄膜光学技术研究室(十一室)
Corresponding AuthorPei, W.
Affiliation1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
2. Graduate School, Chinese Academy of Sciences, Beijing 100039, China
Recommended Citation
GB/T 7714
Pei, Wenjun,Liu, Hongxiang,Du, Weichuan,et al. Coating the 2-m level primary mirror with protected aluminum[C],2012:841517.
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