3 September 2008 Aperture synthesis imaging through turbulence with the aid of lucky imaging
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Abstract
Aperture synthesis allows a number of small apertures to operate cooperatively in the synthesis of a large full aperture telescope. For earth-based systems, the effects of atmospheric turbulence, which introduces time-varying aberrations, must somehow be corrected if good imagery is to be obtained. One correction scheme relies on a comparison, in a range of overlap, of correctly-phased spatial frequency components with new components that are in error by unknown piston (constant) and tip-tilt (linear) phase terms. Normally this method requires that the subapertures employed in the synthesis be sufficiently small that phase aberrations beyond piston and tip-tilt be ignorable. Through the exploitation of lucky imaging conditions, however, larger apertures can be used, with a subsequent increase in resolution and light-gathering power for the optical system.
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Jennifer E. Ward, Jennifer E. Ward, William T. Rhodes, William T. Rhodes, John T. Sheridan, John T. Sheridan, } "Aperture synthesis imaging through turbulence with the aid of lucky imaging", Proc. SPIE 7072, Optics and Photonics for Information Processing II, 70720I (3 September 2008); doi: 10.1117/12.795330; https://doi.org/10.1117/12.795330
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