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Quantitative evaluation on internal seeing induced by heat-stop of solar telescope
Liu, Yangyi1,2,3; Gu, Naiting1,2; Rao, Changhui1,2
Source PublicationOPTICS EXPRESS
Volume23Issue:15Pages:19980-19995
2015-07-27
Language英语
ISSN1094-4087
DOI10.1364/OE.23.019980
Indexed BySCI
WOS IDWOS:000361035300137
SubtypeArticle
Abstractheat-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 KeywordTHERMAL DESIGN ; GREGOR
WOS Research AreaOptics
WOS SubjectOptics
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/3707
Collection光电技术研究所被WoS收录文章
Affiliation1.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
GB/T 7714
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.
APA Liu, Yangyi,Gu, Naiting,&Rao, Changhui.(2015).Quantitative evaluation on internal seeing induced by heat-stop of solar telescope.OPTICS EXPRESS,23(15),19980-19995.
MLA Liu, Yangyi,et al."Quantitative evaluation on internal seeing induced by heat-stop of solar telescope".OPTICS EXPRESS 23.15(2015):19980-19995.
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