Wave-front temporal spectra in high-resolution imaging through turbulence.

Details Wave-front temporal spectra in high-resolution imaging through turbulence. Wave-front temporal spectra in high-resolution imaging through turbulence.

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995josaa..12.1559c&link_type=abstract

Journal of the Optical Society of America A, Vol. 12, No. 7, p. 1559 - 1570

Physics

Optics

49

Adaptive Optics

Scientific paper

A general formulation is given for the derivation of theoretical temporal power spectra of quantities related to turbulent wave-front phase. These temporal power spectra and their asymptotic power laws and cutoff frequencies are presented for various quantities of interest in the field of interferometry (differential piston), wave-front sensing (Shack-Hartmann and curvature sensor), adaptive optics (Zernike polynomials), and seeing monitoring (differential angle of arrival). The authors demonstrate that in adaptive optics systems low-order modes require higher servoloop bandwidths than do high-order modes in order for the residual variance to be balanced between the corrected modes. The same conclusion applies to fringe tracking in large telescope interferometers equipped with adaptive optics systems.

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