Tip/tilt Alignment for a Fizeau Interferometer via Defocus-Based Sub-Spot Separation

doi:10.1109/JPHOT.2020.3032524

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	Tip/tilt Alignment for a Fizeau Interferometer via Defocus-Based Sub-Spot Separation
	Wenyi Lv ; Zongliang Xie ; Qiang Wang ; Haotong Ma ; Jianliang Shi ; Yang Liu
刊名	IEEE Photonics Journal
	2020-10-20
卷号	12 期号:6 页码:3901113
关键词	Fizeau interferometric imaging, tip/tilt alignment, servo-control technology
ISSN号	1943-0655
DOI	10.1109/JPHOT.2020.3032524
文献子类	期刊论文
英文摘要	It is a crucial premise for Fizeau interferometric imaging that all the optical axes of sub-apertures are well aligned. What is challenging in tip/tilt alignment of such interferometers is the superposition of all the sub-aperture spots on the focal plane for generation of fringes. In this paper, we propose and demonstrate a simple tip/tilt alignment scheme via defocus-based sub-spot separation (TADS). The focal interference function is divided into sparse defocused sub-spots at a long defocusing distance. Then the servo-control technology with a centroid extracting algorithm is used to align all the sub-aperture optical axes, each corresponding to a defocused sub-spot. The pointing correction performance using TADS has been verified through closed-loop experiments performed on a Fizeau telescope array testbed newly built in our laboratory. Compared with the current means, the proposed TADS eliminates the requirement of complex hardware design and the limitation of sub-aperture amounts, which is compatible with most existing segmented mirrors and telescope arrays.
语种	英语
出版者	IEEE
内容类型	期刊论文
源URL	[http://ir.ioe.ac.cn/handle/181551/10151]
专题	光电技术研究所_光电工程总体研究室（一室）
通讯作者	Wenyi Lv
作者单位	1.Key Laboratory of Optical Engineering, Chinese Academy of Science, Chengdu 61020, China 2.Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 61020, China 3.University of Chinese Academy of Science, Beijing 100049, China
推荐引用方式 GB/T 7714	Wenyi Lv,Zongliang Xie,Qiang Wang,et al. Tip/tilt Alignment for a Fizeau Interferometer via Defocus-Based Sub-Spot Separation[J]. IEEE Photonics Journal,2020,12(6):3901113.
APA	Wenyi Lv,Zongliang Xie,Qiang Wang,Haotong Ma,Jianliang Shi,&Yang Liu.(2020).Tip/tilt Alignment for a Fizeau Interferometer via Defocus-Based Sub-Spot Separation.IEEE Photonics Journal,12(6),3901113.
MLA	Wenyi Lv,et al."Tip/tilt Alignment for a Fizeau Interferometer via Defocus-Based Sub-Spot Separation".IEEE Photonics Journal 12.6(2020):3901113.