Published in

Zenodo, 2017

DOI: 10.5281/zenodo.1117650

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Super-Resolving Toraldo Pupils For Radio Astronomical Applications: Current Status And Future Prospects

Journal article published in 2017 by Olmi Luca
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

More than half a century ago, in 1952, Giuliano Toraldo di Francia suggested that the resolving power of an optical instrument could be improved using a filter consisting of finite-width concentric coronae of different amplitude and phase transmittance, now known as Toraldo Pupils (TPs). The concept of ’super- resolution’ was born, and in the cur- rent literature it is generally associated with various meth- ods for improving the angular resolution of an optical imag- ing system beyond the classical diffraction limit. In the mi- crowave range, the first successful laboratory test of TPs was performed in 2003. These first results suggested that TPs could represent a viable approach to achieve super- resolution in Radio Astronomy. We have therefore started a project devoted to an exhaustive study of TPs and how they could be implemented on a radio telescope. In this work we present a summary of the status of this project, and then we will describe our future plans.

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