Abstract
Density gradients are recorded by interferometric or by schlieren techniques. Both methods require complicated optical set-ups and provide limited field sizes. A new type of computerised schlieren system has very few optical elements and no field limitation. Background Oriented Schlieren (BOS) uses distorted images of reference objects, caused by density gradients (schlieren) in light scattering flows or waves, to get information about these waves. Comparison of a distorted with an undistorted image of a deliberately structured background provides the density gradients.
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Meier, G.E.A., Stasicki, B. (2003). Density Measurement of Large Scale Transonic Flow Fields. In: Sobieczky, H. (eds) IUTAM Symposium Transsonicum IV. Fluid Mechanics and its Applications, vol 73. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0017-8_27
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DOI: https://doi.org/10.1007/978-94-010-0017-8_27
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3998-7
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