18 September 1996 Detection of ultrasonic vibrations on rough surfaces through the photorefractive effect
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Proceedings Volume 2782, Optical Inspection and Micromeasurements; (1996) https://doi.org/10.1117/12.250776
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France
We present and describe two techniques used for optical detection of ultrasonic signals based on the photorefractive effect. These techniques used the wavefront adaptation properties of the photorefractive effect. In the photorefractive beam combiner, a local oscillator matched to the signal wavefront is created, leading to an homodyne detection system having a large etendue. In the double phase conjugate heterodyne detection system the signal beam wavefront is cleaned by a double phase conjugate mirror and transformed in a plane wave that is sent on a classical heterodyne detection system. Both systems are characterized and used to detect ultrasound.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philippe Delaye, Philippe Delaye, Alain Blouin, Alain Blouin, Louis-Anne de Montmorillon, Louis-Anne de Montmorillon, Ivan Biaggio, Ivan Biaggio, Denis Drolet, Denis Drolet, Jean-Pierre Monchalin, Jean-Pierre Monchalin, Gerald Roosen, Gerald Roosen, } "Detection of ultrasonic vibrations on rough surfaces through the photorefractive effect", Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); doi: 10.1117/12.250776; https://doi.org/10.1117/12.250776

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