Aperture synthesis imaging through turbulence with the aid of lucky imaging

Jennifer E. Ward; William T. Rhodes; John T. Sheridan

doi:10.1117/12.795330

3 September 2008 Aperture synthesis imaging through turbulence with the aid of lucky imaging

Jennifer E. Ward, William T. Rhodes, John T. Sheridan

Proceedings Volume 7072, Optics and Photonics for Information Processing II; 70720I (2008) https://doi.org/10.1117/12.795330
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Jennifer E. Ward, William T. Rhodes, and 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); https://doi.org/10.1117/12.795330

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