1 March 1990 Theoretical and experimental analysis of the modulation response of a sampled IR imaging system
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Abstract
A cascade approach to the definition of the MTF for a (linear) sampled imaging system is discussed. The peculiarity of the present model consists in the fact that it can yield both the aliasing band and the averaged modulation response of the sampling process alone. For a line-scan system, which is the case of a typical Infrared Scanning Radiometer, a practical criterion to assess whether the coupled sampling and imaging subsystems produce a combined system which is either imaging-dependent or sampling-dependent is proposed. The application to the AGEMA Thermovision 880 IR camera connected to the TIC 8000 A/D sampling board is also discussed. The necessity to characterize the performance of the system in terms of its spatial resolution is given by the need to resolve the surface distribution of Goertler vortices on a ramp model in hypersonic flow.
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Luigi de Luca, Luigi de Luca, Gennaro Cardone, Gennaro Cardone, Giovanni Maria Carlomagno, Giovanni Maria Carlomagno, } "Theoretical and experimental analysis of the modulation response of a sampled IR imaging system", Proc. SPIE 1313, Thermosense XII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (1 March 1990); doi: 10.1117/12.21945; https://doi.org/10.1117/12.21945
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