Interferometric method for measuring high velocities of diffuse surfaces.
An interferometric method for measuring the displacement of diffuse surfaces moving with velocities of a few millimeters per microsecond is presented. The method utilizes the interference between two light beams reflected from a constant area of the moving surface at two different angles. It enables the detection of the high-rate velocity variations. A light source with modest temporal coherence and power around 100 mW is needed.
Maron
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Department of Nuclear Physics, Weizmann Institute of Science, Rehovot, Israel.