Misalignment algorithm of a wide-field survey telescope based on third-order quadratic nodal aberration theory

doi:10.1117/1.JATIS.7.4.049003

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	Misalignment algorithm of a wide-field survey telescope based on third-order quadratic nodal aberration theory
	J. Wang; X. He; X. Zhang and J. Luo
	2021
发表期刊	Journal of Astronomical Telescopes, Instruments, and Systems
ISSN	23294124
卷号	7 期号:4
摘要	Off-axis three-mirror anastigmatic (TMA) telescopes with designed decenters and tilts, have many misalignment degrees of freedom and strong coupling between each misalignment degree of freedom. Therefore, it is difficult to establish misalignment equations only using A222 and A131 in nodal aberration theory (NAT). In addition, for off-axis TMA optical systems with designed decenters and tilts, the robustness of the existing fifth-order NAT misalignment calculation algorithm based on high-order Zernike coefficients and boresight errors decreases, so it is difficult to realize its engineering application. To solve the issue of insufficient practicality of the existing misalignment algorithm based on fifth-order NAT, a third-order NAT calculation algorithm based on quadratic aberration field decenter vectors is derived and established. Two concepts of inherent aberration field decenter vector and misalignment aberration field decenter vector are proposed. Taking an off-axis TMA optical system with 6-m focal length as the research object, simulations, and alignment verification experiments were carried out. Compared with the existing fifth-order NAT misalignment algorithm, the results show that when measurement noise is not considered, the two methods can both obtain convergent calculation results, and the average RMS wavefront errors (WFE) of the optical system are both corrected to be below 0.0574 waves. When different levels of measurement noise are introduced, the robustness of the fifth-order NAT misalignment algorithm decreases, and there are even cases where the optical system completely fails to be corrected. However, the algorithm based on quadratic aberration field decenter vectors shows better robustness. Under different levels of measurement noise, this algorithm could correct the average RMS WFE of the optical system to around 0.0574 waves. 2021 Society of Photo-Optical Instrumentation Engineers (SPIE).
DOI	10.1117/1.JATIS.7.4.049003
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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/181722/65422
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	J. Wang,X. He,X. Zhang and J. Luo. Misalignment algorithm of a wide-field survey telescope based on third-order quadratic nodal aberration theory[J]. Journal of Astronomical Telescopes, Instruments, and Systems,2021,7(4).
APA	J. Wang,X. He,&X. Zhang and J. Luo.(2021).Misalignment algorithm of a wide-field survey telescope based on third-order quadratic nodal aberration theory.Journal of Astronomical Telescopes, Instruments, and Systems,7(4).
MLA	J. Wang,et al."Misalignment algorithm of a wide-field survey telescope based on third-order quadratic nodal aberration theory".Journal of Astronomical Telescopes, Instruments, and Systems 7.4(2021).

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