Diffraction limited imaging in the visible from large ground-based telescopes: new methods for future instruments and telescopes

Mackay, Craig; Law, Nick; Stayley, Timothy D.

doi:doi:10.1117/12.787439

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Proceedings / Volume 7014 / Adaptive Optics Fed Instrumentation and High Contrast Imaging I

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Diffraction limited imaging in the visible from large ground-based telescopes: new methods for future instruments and telescopes

Proc. SPIE 7014, 70141C (2008); http://dx.doi.org/10.1117/12.787439

Monday 23 June 2008

Marseille, France

Ground-based and Airborne Instrumentation for Astronomy II

Ian S. McLean, Mark M. Casali

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Abstract

References (7)

Craig Mackay and Timothy D. Stayley

Institute of Astronomy, Univ. of Cambridge (United Kingdom)

Nick Law

California Institute of Technology

Faint object diffraction limited imaging in the visible from the ground has recently been demonstrated on a 5 m telescope with more than twice the resolution of Hubble for the first time. It has shown the way towards diffraction limited imaging in the visible with the next generation of large telescopes. This paper describes the results of experiments to show how this is achieved and what is needed to work well with faint natural guide stars. The importance of a large isoplanatic patch size is also emphasised. In particular, we will describe a new approach to the design of high efficiency, low order adaptive curvature sensors which use photon counting CCD detectors. Such systems used on larger telescopes together with image segmentation and resynthesis techniques using closure phase techniques are shown to have an important place in achieving these goals. The optimum combination of these different techniques will be explained for a variety of different applications.

History

Online Jul 09, 2008

Digital Object Identifier

http://dx.doi.org/10.1117/12.787439

Citation

Craig Mackay, Nick Law and Timothy D. Stayley, "Diffraction limited imaging in the visible from large ground-based telescopes: new methods for future instruments and telescopes", Proc. SPIE 7014, 70141C (2008); http://dx.doi.org/10.1117/12.787439