24 August 1987 Wind Tunnel Experimental Study Of Optical Beam Degradation Through Heterogeneous Aerodynamic Flows
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Abstract
This paper deals with the influence of aerodynamic disturbances on the quality of images obtained by an airborne optical system. A wind-tunnel experiment has been carried out in order to simulate aero-optical phenomena in transsonic and supersonic flows. The characterization of such effects is obtained by studying the propagation of a laser beam (λ : 0.63 pa) through optical aerodynamic configurations. The influences of turbulent mixing zone and shock waves have been studied. Each aerodynamical configuration has been qualified by both Schlieren visualization and wall pressure probing test. For each configuration, images are recorded and then processed to obtain point spread functions (PSF), optical transfer functions (OTF), modulation transfer function (MTF) and Wiener spectrum of the images. This study should lead to match optical and aerodynamical considerations in designing future airborne imaging systems.
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Ruy Deron, Ruy Deron, Michel Philbert, Michel Philbert, Jean-Louis Solignac, Jean-Louis Solignac, Jean-Pierre Faleni, Jean-Pierre Faleni, } "Wind Tunnel Experimental Study Of Optical Beam Degradation Through Heterogeneous Aerodynamic Flows", Proc. SPIE 0788, Flow Visualization and Aero-Optics in Simulated Environments, (24 August 1987); doi: 10.1117/12.940698; https://doi.org/10.1117/12.940698
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