NIAOT OpenIR  > 会议论文
Application of research for metal primary mirror of large-aperture infrared solar telescope
Meng Xiaohui; Zhang Haiying; Li Xinnan
Source PublicationAdvanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
PagesVol.7654 0M-1-6
Conference Date2010-4-26
Conference PlaceDalian, China
Funding OrganizationThe International Society for Optical Engineering
Metal is an early telescope mirror material, it was later replaced by glass which has lower thermal expansion coefficient. However, for observing the sun, these glass materials in the primary mirror are affected by the sun's intense radiation, its temperature rises rapidly, but which conducts heat slowly. The temperature difference between mirror and ambient air is so large that causing the air turbulence which has affected the observation precision. While the metal material has better thermal conductivity characteristics, it can greatly improve the problems caused by air turbulence. This paper analyzes the characteristics of the various mirror materials, and then makes a rust-proof aluminum alloy 5A05 as the mirror substrate material. For the major deficiencies of the soft aluminum surface which is not suitable for polishing, this paper presents a method of electroless nickel plating to improve its surface properties. After the mirror go through a thermal shock, the upper and lower levels of metal CTE don’t match with each other, which leads to mirror deformation and warping. The bimetallic effect has been illustrated by the theory of beam element and give a result of elementary approximated. The analysis shows that the displacement deformation of the upper and lower layers of metal which is caused by thermal shock is smaller when the CTE is closer. In the experiments, a spherical aluminum mirrors with the substrate of 5A05 aluminum alloy, diameter of 110mm, the radius of curvature of 258.672mm is manufactured in classical technique. And it ultimately achieves optical mirror-polished precision. Besides, the long-term thermal stability experimental study of the aluminum mirrors proved that Al-infrared solar telescope primary mirror meets the needs of the long-term observation during use.
KeywordInfrared Solar Telescope Metal Mirror Bimetallic Effect Electroless Nickel Plating
Subject Area太阳望远镜 ; 天文技术与方法
Document Type会议论文
Recommended Citation
GB/T 7714
Meng Xiaohui,Zhang Haiying,Li Xinnan. Application of research for metal primary mirror of large-aperture infrared solar telescope[C]:SPIE,2010:Vol.7654 0M-1-6.
Files in This Item: Download All
File Name/Size DocType Version Access License
Application of resea(670KB) 开放获取CC BY-NC-NDView Download
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Meng Xiaohui]'s Articles
[Zhang Haiying]'s Articles
[Li Xinnan]'s Articles
Baidu academic
Similar articles in Baidu academic
[Meng Xiaohui]'s Articles
[Zhang Haiying]'s Articles
[Li Xinnan]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Meng Xiaohui]'s Articles
[Zhang Haiying]'s Articles
[Li Xinnan]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Application of research for metal primary mirror of large-aperture infrared solar telescope.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.