Influence of temperature gradient on thermal stability tolerance of large aperture reflective mirror

doi:10.3788/IRLA201948.0916003

CIOMP OpenIR

	Influence of temperature gradient on thermal stability tolerance of large aperture reflective mirror
	X.Yang; S.Xu; X.Li; X.Zhang; H.Ma
	2019
发表期刊	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
ISSN	10072276
卷号	48 期号:9
摘要	In order to investigate the influence of temperature on the radius of curvature and the RMS value of the large aperture SiC reflective mirror, a finite element model was established for a 2 m-aperture SiC primary mirror of a space telescope, and the effects of uniform temperature field, axial temperature gradient and radial temperature gradient on the radius of curvature and RMS of the mirror were analyzed. The accuracies of the simulation method and results were verified by experiment theoretical arithmetic. The results show that the influence of temperature gradient on the radius of curvature and the RMS value of the mirror is much greater than the effect of uniform temperature. The change of curvature radius is most sensitive to the axial temperature gradient, and the RMS value of the surface figure is most sensitive to the radial temperature gradient. The change in radius of curvature caused by the 1 axial temperature gradient is 48 times greater than the change in radius of curvature caused by the same uniform temperature rise. The RMS of surface figure caused by the 1 radial temperature gradient can be 202 times larger than that caused by the same uniform temperature rise. The influence of axial temperature gradient and radial temperature gradient on the thermal stability tolerance must be considered in determining the thermal control index of the mirror. 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
关键词	Thermal gradients,Mirrors,Silicon carbide,Silicon compounds,Thermodynamic stability
DOI	10.3788/IRLA201948.0916003
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收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62872
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X.Yang,S.Xu,X.Li,et al. Influence of temperature gradient on thermal stability tolerance of large aperture reflective mirror[J]. Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,2019,48(9).
APA	X.Yang,S.Xu,X.Li,X.Zhang,&H.Ma.(2019).Influence of temperature gradient on thermal stability tolerance of large aperture reflective mirror.Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,48(9).
MLA	X.Yang,et al."Influence of temperature gradient on thermal stability tolerance of large aperture reflective mirror".Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering 48.9(2019).

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