1995
DOI: 10.1117/12.212635
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<title>Active stabilization of ESPI systems for applications under rough conditions</title>

Abstract: A method for the active stabilisation of an out-of-plane Electronic Speckle Pattern Interferometer, (ESPI), is presented. A compact Michelson Interferometer is adapted to the ESPI head to determine the relative motion between the ESPI and the object. The signal of the Michelson interferometer is prepared by a microcontroller and supplied as an addition signal to the phase shifting unit of the ESPI.The presented solution is a practical method for applications with realtime ESPI. It increases the potential of ES… Show more

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