Comparison of iterative wavefront reconstruction algorithms for high-resolution adaptive optics systems

Shengyi Cheng; Lizhi Dong; Shanqiu Chen; Ping Yang; Mingwu Ao; Bing Xu

doi:10.1117/12.2072685

18 November 2014 Comparison of iterative wavefront reconstruction algorithms for high-resolution adaptive optics systems

Shengyi Cheng, Lizhi Dong, Shanqiu Chen, Ping Yang, Mingwu Ao, Bing Xu

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Proceedings Volume 9298, International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics; 92981M (2014) https://doi.org/10.1117/12.2072685
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

Based on a 979-actuator adaptive optics system, this paper analyzes the different performance of iterative wavefront reconstruction algorithms. Under the condition of dynamic wavefront errors, the iteration number, storage space and the number of multiplication of steepest descent method, conjugate gradient method and G-S iterative method are studied. The steepest descent method and conjugate gradient method need smaller storage space. Both the G-S iterative method and the conjugate gradient method converge faster than steepest descent method, while the latter takes the least number of multiplication. Finally, the optimal iterative algorithm is selected considering storage space, iteration numbers and the number of multiplication.

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Shengyi Cheng, Lizhi Dong, Shanqiu Chen, Ping Yang, Mingwu Ao, and Bing Xu "Comparison of iterative wavefront reconstruction algorithms for high-resolution adaptive optics systems", Proc. SPIE 9298, International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics, 92981M (18 November 2014); https://doi.org/10.1117/12.2072685

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KEYWORDS

Reconstruction algorithms

Adaptive optics

Wavefront reconstruction

Iterative methods

Actuators

Wavefronts

Process control

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