Zernike modal compensation analysis for an adaptive optics system using direct-gradient wavefront reconstruction algorithm

Xinyang Li; Chunhong Wang; Hao Xian; Xubin Wu; Wenhan Jiang

doi:10.1117/12.363567

27 September 1999 Zernike modal compensation analysis for an adaptive optics system using direct-gradient wavefront reconstruction algorithm

Xinyang Li, Chunhong Wang, Hao Xian, Xubin Wu, Wenhan Jiang

Author Affiliations +

Proceedings Volume 3762, Adaptive Optics Systems and Technology; (1999) https://doi.org/10.1117/12.363567
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Power spectra function was used usually to describe the time domain characteristic of atmosphere disturbed wavefront. Power spectra reject function, which defines as the ratio of the power spectra function of the close-loop compensated wavefront to the open-loop disturbed wavefront, was used to describe the control effect of an adaptive optical system. In this paper the control effect of the Zernike wavefront modals for an adaptive optical system using direct-gradient wavefront reconstruction algorithm was analyzed by using the power spectra reject function of Zernike model coefficients. The dynamic models of Zernike modal compensation for the direct-gradient algorithm were established. The power spectra reject functions were calculated from the theoretic model and compared with those gotten from experimental data. It is shown that there is coupling between some Zernike modals while using the direct-gradient algorithm. Although the control bandwidth was affected slightly, the power spectra reject function of the coupled Zernike modals become worse at low frequency range, this causes the wavefront compensation effect descended to some degree.

Citation Download Citation

Xinyang Li, Chunhong Wang, Hao Xian, Xubin Wu, and Wenhan Jiang "Zernike modal compensation analysis for an adaptive optics system using direct-gradient wavefront reconstruction algorithm", Proc. SPIE 3762, Adaptive Optics Systems and Technology, (27 September 1999); https://doi.org/10.1117/12.363567

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