Modern speckle photography based on the computer-aided evaluation of speckle patterns extends the methods of optical flow visualization and diagnostics, and it allows the quantitative derivation of a two dimensional map of the angles of deflection experienced by light when passing through a flow under study. Such a map may be used for the tomographic reconstruction of 3D density (or temperature) fields in both laminar and turbulent flows.
KeywordsSpeckle Pattern Observation Plane Double Exposure Refractive Index Distribution Free Space Propagation
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