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A number of robust and portable electronic speckle pattern interferometry (ESPI) systems have been developed in which specimen loading, optical inspection, image processing and data acquisition are fully automated. The use of modern optical components (eg laser diodes and single-mode optical fibre light-guides) and new generation image acquisition hardware has meant that advanced optical measurement algorithms for quantitative analysis such as digital phase shifting interferometry (DSPI) and phase-unwrapping can be implemented in a compact and user-friendly system. Since the custom control software has a high degree of portability and the optical assembly in modular in design, the cost and effort of putting together a powerful ESPI system has been kept to a minimum.

Additional information

Authors: WHELAN M, JRC Ispra (IT)
Bibliographic Reference: Article: European Society of Biomechanics Newsletter (1998)
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