Abstract
It is well known that atmospheric turbulence limits the resolution available to ground based astronomical observations to 0.5-1.0 arcseconds in the infrared. The advent of speckle interferometry in the 1970’s [1] has allowed the recovery of diffraction limited Fourier modulus information of astronomical objects of interest to be attempted routinely. A number of methods have since been proposed to obtain diffraction limited Fourier phase information, and thus image recovery. In the visible, where D/ro is large, it is now generally accepted that phase recovery from the average image bispectrum (or equivalently the triple correlation) appears to be the most successful [2] [3] [4].
© 1995 Optical Society of America
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