31 July 2014 High-resolution imaging in the visible on large ground-based telescopes
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Abstract
Lucky Imaging combined with a low order adaptive optics system has given the highest resolution images ever taken in the visible or near infrared of faint astronomical objects. This paper describes a new instrument that has already been deployed on the WHT 4.2m telescope on La Palma, with particular emphasis on the optical design and the predicted system performance. A new design of low order wavefront sensor using photon counting CCD detectors and multi-plane curvature wavefront sensor will allow virtually full sky coverage with faint natural guide stars. With a 2 x 2 array of 1024 x 1024 photon counting EMCCDs, AOLI is the first of the new class of high sensitivity, near diffraction limited imaging systems giving higher resolution in the visible from the ground than hitherto been possible from space.
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Craig MacKay, Rafael Rebolo, Jonathan Crass, David L. King, Lucas Labadie, Victor González Escalera, Marta Puga, Antonio Pérez Garrido, Roberto López, Alejanrdo Oscoz, Jorge A. Pérez-Prieto, Luis F. Rodríguez-Ramos, Sergio Velasco, Isidro Villó, "High-resolution imaging in the visible on large ground-based telescopes", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91471T (31 July 2014); doi: 10.1117/12.2055907; https://doi.org/10.1117/12.2055907
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