4 August 2016 AGP (Astrometric Gravitation Probe) optical design report
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Abstract
This paper describes the current opto-mechanical design of AGP, a mission designed for astrometric verification of General Relativity (GR) and competing gravitation theories by means of precise determination of light deflection on field stars, and of orbital parameters of selected Solar System objects. The optical concept includes a planar rear-view mirror for simultaneous imaging on the CCD mosaic detector of fields of view also from the direction opposite to the Sun, affected by negligible deflection, for the sake of real time calibration. The precision of astrometric measurements on individual stars will be of order of 1 mas, over two fields separated by few degrees around the Sun and observed simultaneously. We describe the optical design characteristics, with particular reference to manufacturing and tolerancing aspects, evidencing the preservation of very good imaging performance over the range of expected operating conditions.
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Alberto Riva, Alberto Riva, Mario Gai, Mario Gai, Federico Landini, Federico Landini, Paolo Lazzarini, Paolo Lazzarini, Daniele Gallieni, Daniele Gallieni, Matteo Tintori, Matteo Tintori, Alberto Anselmi, Alberto Anselmi, Stefano Cesare, Stefano Cesare, Deborah Busonero, Deborah Busonero, Mario Gilberto Lattanzi, Mario Gilberto Lattanzi, Alberto Vecchiato, Alberto Vecchiato, "AGP (Astrometric Gravitation Probe) optical design report", Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 990742 (4 August 2016); doi: 10.1117/12.2232769; https://doi.org/10.1117/12.2232769
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