Optics ellipticity performance of an unobscured off-axis space telescope

	Optics ellipticity performance of an unobscured off-axis space telescope
	Zeng F.; Zhang X.; Zhang J. P.; Shi G. W.; Wu H. B.
	2014
发表期刊	Optics Express
ISSN	ISBN/1094-4087
卷号	22 期号:21 页码:25277-25285
摘要	With the development of astronomy, more and more attention is paid to the survey of dark matter. Dark matter cannot be seen directly but can be detected by weak gravitational lensing measurement. Ellipticity is an important parameter used to define the shape of a galaxy. Galaxy ellipticity changes with weak gravitational lensing and nonideal optics. With our design of an unobscured off-axis telescope, we implement the simulation and calculation of optics ellipticity. With an accurate model of optics PSF, the characteristic of ellipticity is modeled and analyzed. It is shown that with good optical design, the full field ellipticity can be quite small. The spatial ellipticity change can be modeled by cubic interpolation with very high accuracy. We also modeled the ellipticity variance with time and analyzed the tolerance. It is shown that the unobscured off-axis telescope has good ellipticity performance and fulfills the requirement of dark matter survey. (C) 2014 Optical Society of America
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/44234
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zeng F.,Zhang X.,Zhang J. P.,et al. Optics ellipticity performance of an unobscured off-axis space telescope[J]. Optics Express,2014,22(21):25277-25285.
APA	Zeng F.,Zhang X.,Zhang J. P.,Shi G. W.,&Wu H. B..(2014).Optics ellipticity performance of an unobscured off-axis space telescope.Optics Express,22(21),25277-25285.
MLA	Zeng F.,et al."Optics ellipticity performance of an unobscured off-axis space telescope".Optics Express 22.21(2014):25277-25285.

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