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Proceedings Paper

Innovative optical setup for testing a stereo camera for space applications
Author(s): Giampiero Naletto; Michele Cesaro; Alessandro Albasini; Gabriele Cremonese; Vania Da Deppo; Gianfranco Forlani; Cristina Re; Riccardo Roncella; Giuseppe Salemi; Emanuele Simioni
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Paper Abstract

The Stereo Camera (STC) of the SIMBIO-SYS imaging suite of the BepiColombo ESA mission to Mercury is based on an innovative and compact design in which the light independently collected by two optical channels at ±20° separation with respect to nadir falls on a common bidimensional detector. STC adopts a novel stereo acquisition mode, based on the push-frame concept, never used before on a space mission. To characterize this camera for obtaining the most accurate data of the Mercury surface, standard calibration measurements have been performed. In addition, we also wanted to demonstrate and characterize the capability of the instrument to reconstruct a 3D surface with the desired accuracy by means of the stereo push-frame concept. To this end, a lab setup has been realized with an evaluation model of STC, in which the problem of working at an essentially infinite object distance over hundred km baselines has been overcome by means of a simple collimator and two precision rotators. The intrinsic and extrinsic parameters of the camera have been obtained with standard stereo procedures, adapted to the specific case. The stereo validation has been performed by comparing the shape of the target object accurately measured by laser scanning, with the shape reconstructed by applying the adopted stereo algorithm to the acquired image pairs. The obtained results show the goodness of this innovative validation technique, that will be applied also for validating the stereo capabilities of STC flight model.

Paper Details

Date Published: 21 September 2012
PDF: 12 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84421M (21 September 2012); doi: 10.1117/12.926182
Show Author Affiliations
Giampiero Naletto, Univ. degli Studi di Padova (Italy)
CNR-Istituto di Fotonica e Nanotecnologie (Italy)
INAF - Osservatorio Astronomico di Padova (Italy)
Michele Cesaro, Univ. degli Studi di Padova (Italy)
CNR-Istituto di Fotonica e Nanotecnologie (Italy)
Alessandro Albasini, Univ. degli Studi di Padova (Italy)
Gabriele Cremonese, INAF - Osservatorio Astronomico di Padova (Italy)
Vania Da Deppo, CNR-Istituto di Fotonica e Nanotecnologie (Italy)
INAF - Osservatorio Astronomico di Padova (Italy)
Gianfranco Forlani, Univ. degli Studi di Parma (Italy)
Cristina Re, Univ. degli Studi di Padova (Italy)
Univ. degli Studi di Parma (Italy)
Riccardo Roncella, Univ. degli Studi di Parma (Italy)
Giuseppe Salemi, Univ. degli Studi di Padova (Italy)
Emanuele Simioni, CNR-Istituto di Fotonica e Nanotecnologie (Italy)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann, Editor(s)

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