Scene-based wavefront correction using SPGD algorithm for high-resolution earth observation

M. Hirose; N. Miyamura; S. Sato; T. Mizutani; T. Kimura

doi:10.1117/12.2690817

12 July 2023 Scene-based wavefront correction using SPGD algorithm for high-resolution earth observation

M. Hirose, N. Miyamura, S. Sato, T. Mizutani, T. Kimura

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Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 127774A (2023) https://doi.org/10.1117/12.2690817
Event: International Conference on Space Optics — ICSO 2022, 2022, Dubrovnik, Croatia

Abstract

Model-free image-based wavefront correction is a useful technique in resource-limited spaceborne imaging systems used for Earth observation. However, such an approach is difficult because correction performance depends on selection of the measured scenes and the evaluation metric. In this study, the relationship is experimentally and numerically investigated using the stochastic parallel gradient descent (SPGD) algorithm. As a result, the combination of deviation-based metrics and scenes with distinct structures was found to facilitate wavefront correction. The results also show that the present approach is useful in not only monolithic but also segmented mirror optics. The proposed method will contribute to realize on-orbit wavefront-sensorless aberration removal required in near-future high-resolution Earth observation systems.

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M. Hirose, N. Miyamura, S. Sato, T. Mizutani, and T. Kimura "Scene-based wavefront correction using SPGD algorithm for high-resolution earth observation", Proc. SPIE 12777, International Conference on Space Optics — ICSO 2022, 127774A (12 July 2023); https://doi.org/10.1117/12.2690817

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KEYWORDS

Wavefronts

Wavefront aberrations

Deformable mirrors

Segmented mirrors

Imaging systems

Microelectromechanical systems

Astronomical imaging

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