Efficient misalignment calculation for two-mirror optical systems based on wavefront aberrations in a single field of view

Wu, Wei; Deng, Zhun; Li, Xingchen; Luo, Zirong; Shang, Jianzhong

doi:10.1117/1.oe.60.12.125104

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“…At present, active alignment methods are mainly divided into two classes: numerical method and analytic method. On the numerical computing side, sensitive table method (STM) [ 7 ], artificial neural networks method (ANN) [ 8 ], merit function (MF) regression method [ 9 , 10 , 11 ], differential wavefront sampling (DWS) [ 12 , 13 , 14 ] and image features [ 15 , 16 , 17 ] are widely used in ground alignment. The analytical method is mainly nodal aberration theory (NAT) [ 18 , 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Active Alignment of Large-Aperture Space Telescopes for Optimal Ellipticity Performance

Bai

et al. 2023

Sensors

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Ellipticity performance of space telescopes is important for exploration of dark matter. However, traditional on-orbit active optical alignment of space telescopes often takes “minimum wavefront error across the field of view” as the correction goal, and the ellipticity performance after correcting the wave aberration is not optimal. This paper proposes an active optical alignment strategy to achieve optimal ellipticity performance. Based on the framework of nodal aberration theory (NAT), the aberration field distribution corresponding to the optimal full field-of-view ellipticity is determined using global optimization. The degrees of freedom (DOFs) of the secondary mirror and the folded flat mirror are taken as the compensation DOFs to achieve the optimal ellipticity performance. Some valuable insights into aberration field characteristics corresponding to optimal ellipticity performance are presented. This work lays a basis for the correction of ellipticity for complicated optical systems.

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Section: Introductionmentioning

confidence: 99%

Active Alignment of Large-Aperture Space Telescopes for Optimal Ellipticity Performance

Bai

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

Efficient misalignment calculation for two-mirror optical systems based on wavefront aberrations in a single field of view

Cited by 1 publication

References 0 publications

Active Alignment of Large-Aperture Space Telescopes for Optimal Ellipticity Performance

Active Alignment of Large-Aperture Space Telescopes for Optimal Ellipticity Performance

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