Optimized wavefront fitting with voltage saturation constraint in adaptive optics system

Wenyu Han; Jiahui Zhou; Nanfei Yan; Ying Yang; Lei Min; Lanqiang Zhang; Youming Guo; Hao Xian

doi:10.1117/12.3018942

30 April 2024 Optimized wavefront fitting with voltage saturation constraint in adaptive optics system

Wenyu Han, Jiahui Zhou, Nanfei Yan, Ying Yang, Lei Min, Lanqiang Zhang, Youming Guo, Hao Xian

Proceedings Volume 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems; 131531D (2024) https://doi.org/10.1117/12.3018942
Event: Sixth Conference on Frontiers in Optical Imaging Technology and Applications (FOI2023), 2023, Nanjing, JS, China

Abstract

Deformable mirrors are key active components in adaptive optics systems that enable real-time correction of wavefronts. When using lightweight high-coupling deformable mirrors to fit large RMS wavefronts, the best-fitting voltage often exceeds the maximum deformation voltage of the deformable mirror. In such a case, cropping the voltage directly will greatly destroy the wavefront. This will affect the closed-loop effect. In response to the above issues, we propose using the interior point method to fit the wavefront. This method can directly solve the problem in the voltage range allowed by the deformable mirror, which not only simplifies the steps of the original method, but also greatly improves the fitting capability of the deformable mirror. We used the traditional least-squares method and the interior-point method to fit the static aberrations separately in the simulations. Results show that for the original wavefront (RMS = 2059.70 nm), the least squares algorithm can correct the aberrations to 425.35 nm, while the interior point method can correct the aberrations to 248.10 nm. In the experiments, we used a deformable mirror with 294 actuators for closed-loop testing. The experiment results show that for the original wavefront (RMS = 808.53 nm), the least squares algorithm can correct the aberrations to 182.39 nm, while the interior point method can correct the aberrations to 100.95 nm. This method has great significance for giving full exploit to the performance of the deformable mirror and improving the wavefront correction capability of the AO system.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Wenyu Han, Jiahui Zhou, Nanfei Yan, Ying Yang, Lei Min, Lanqiang Zhang, Youming Guo, and Hao Xian "Optimized wavefront fitting with voltage saturation constraint in adaptive optics system", Proc. SPIE 13153, Sixth Conference on Frontiers in Optical Imaging and Technology: Novel Technologies in Optical Systems, 131531D (30 April 2024); https://doi.org/10.1117/12.3018942

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