A two-beam laser interferometric device capable of continuously measuring either absolute or differential displacement (both steady state and time variant) with a resolution to one-quarter of the laser wavelength is described. This device is proposed for measurement of model attitude and deflection in wind tunnel applications. Experiments are presented demonstrating its accuracy, versatility, and on-line readout capabilities. A conceptual multibeam device to extend the present device for simultaneous measurement of pitch, roll, twist, and deflection is also discussed.


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    Title :

    The development of a displacement interferometer for model deflection measurements


    Additional title:

    Entwicklung eines Verschiebungsinterferometers fuer die Messung von Abweichungen im Windkanal


    Contributors:
    Bomar, B.W. (author) / Goethert, W.H. (author) / Belz, R.A. (author)

    Published in:

    Publication date :

    1977


    Size :

    58 Seiten


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English