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Proceedings Paper

Zernike modal compensation analysis for an adaptive optics system using direct-gradient wavefront reconstruction algorithm
Author(s): Xinyang Li; Chunhong Wang; Hao Xian; Xubin Wu; Wenhan Jiang
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Paper 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.

Paper Details

Date Published: 27 September 1999
PDF: 9 pages
Proc. SPIE 3762, Adaptive Optics Systems and Technology, (27 September 1999); doi: 10.1117/12.363567
Show Author Affiliations
Xinyang Li, Institute of Optics and Electronics (China)
Chunhong Wang, Institute of Optics and Electronics (China)
Hao Xian, Institute of Optics and Electronics (China)
Xubin Wu, Institute of Optics and Electronics (China)
Wenhan Jiang, Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 3762:
Adaptive Optics Systems and Technology
Robert K. Tyson; Robert Q. Fugate, Editor(s)

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