NASA NTRS · 19740015115
Method of vibration analysis using holographic interferometry and heterodyne optical detection
Abstract
A method of studying thin plate vibrations with the aid of a laser beam is discussed. Through a suitable combination of time-average holographic interferometry, real-time holographic interferometry, and heterodyne optical detection, it is possible to obtain complete information on the vibration parameters of modes, amplitudes, frequencies, and phases. The method has the advantage of three dimensional global observation, noncontact, and high precision measurements.
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Vlad, V. I., Maurer, J., Popa, D.. 1974-04-01. Method of vibration analysis using holographic interferometry and heterodyne optical detection. https://ntrs.nasa.gov/citations/19740015115
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