Optical Analyser Of Vibrations

Alain Constans

doi:10.1117/12.956134

18 April 1978 Optical Analyser Of Vibrations

Alain Constans

Proceedings Volume 0136, 1st European Conf on Optics Applied to Metrology; (1978) https://doi.org/10.1117/12.956134
Event: First European Conference on Optics Applied to Metrology, 1977, Strasbourg, France

Abstract

An optical analyser of vibrations has been developed and produced. It permits the measurement of the amplitude and phase of the vibration of a mechanical part. It is characterized by a very small feeler area, on the order of several 2, depending on the power of the lens used. The frequency domain extends from 20 to 100,000 hz. The amplitudes measured are also a function of the power of the lens and range from 10 m to 10 . The apparatus offers 1000 measurement points. The principle of measurement is as follows: a displacement of the surface examined entails a defocusing which is expressed by the modification of the light flaw received by a differential photodiode. If the surface vibrates, the light flaw is modulated and the vibration is translated by a modulation of the photoelectric currents.

Citation Download Citation

Alain Constans "Optical Analyser Of Vibrations", Proc. SPIE 0136, 1st European Conf on Optics Applied to Metrology, (18 April 1978); https://doi.org/10.1117/12.956134

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