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题名:
Quantitative evaluation on internal seeing induced by heat-stop of solar telescope
作者: Liu, Yangyi1,2,3; Gu, Naiting1,2; Rao, Changhui1,2
刊名: OPTICS EXPRESS
出版日期: 2015-07-27
卷号: 23, 期号:15, 页码:19980-19995
DOI: 10.1364/OE.23.019980
文章类型: Article
英文摘要: heat-stop is one of the essential thermal control devices of solar telescope. The internal seeing induced by its temperature rise will degrade the imaging quality significantly. For quantitative evaluation on internal seeing, an integrated analysis method based on computational fluid dynamics and geometric optics is proposed in this paper. Firstly, the temperature field of the heat-affected zone induced by heat-stop temperature rise is obtained by the method of computational fluid dynamics calculation. Secondly, the temperature field is transformed to refractive index field by corresponding equations. Thirdly, the wavefront aberration induced by internal seeing is calculated by geometric optics based on optical integration in the refractive index field. This integrated method is applied in the heat-stop of the Chinese Large Solar Telescope to quantitatively evaluate its internal seeing. The analytical results show that the maximum acceptable temperature rise of heat-stop is up to 5 Kelvins above the ambient air at any telescope pointing directions under the condition that the root-mean-square of wavefront aberration induced by internal seeing is less than 25nm. Furthermore, it is found that the magnitude of wavefront aberration gradually increases with the increase of heat-stop temperature rise for a certain telescope pointing direction. Meanwhile, with the variation of telescope pointing varying from the horizontal to the vertical direction, the magnitude of wavefront aberration decreases at first and then increases for the same heat-stop temperature rise. (C) 2015 Optical Society of America
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: THERMAL DESIGN ; GREGOR
收录类别: SCI
语种: 英语
WOS记录号: WOS:000361035300137
ISSN号: 1094-4087
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3707
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Opt & Elect, Lab Adapt Opt, Chengdu 610209, Peoples R China
2.Chinese Acad Sci, Key Lab Adapt Opt, Chengdu 610209, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Liu, Yangyi,Gu, Naiting,Rao, Changhui. Quantitative evaluation on internal seeing induced by heat-stop of solar telescope[J]. OPTICS EXPRESS,2015,23(15):19980-19995.
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