Summary form only given. Laser-based ultrasound is a promising technique for remote ultrasonic inspection. One approach for the measurement of small ultrasonic surface displacements uses dynamic holography in a photorefractive material to combine a distorted signal beam with a plane-wave reference beam and match their wavefronts for homodyne detection. Slow variations in the wavefront of the signal beam are compensated by the real-time hologram and thus do not produce noise or interfere with the quality of the wavefront overlap in the output beams.


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    Titel :

    Homodyne detection of ultrasonic surface displacements using two-wave mixing in photorefractive polymers


    Beteiligte:
    Klein, M.B. (Autor:in) / Bacher, G.D. (Autor:in) / Grunnet-Jepsen, A. (Autor:in) / Wright, D. (Autor:in) / Moerner, W.E. (Autor:in)


    Erscheinungsdatum :

    01.01.1999


    Format / Umfang :

    162072 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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