A 3D-interferometer equipped with four different directions of object illumination has been developed to analyze quantitatively in a first step the object surface shape and the interferometer geometry used as well as in a second step the displacement or vibration amplitude fields of mechanically loaded elements. The combination of the interference phase evaluation by digital image processing leads to a justifiable calculation time and a higher accuracy of the measuring results. First experience are described by example of synthetic interferograms concerning the determination of the object shape and the measuring accuracy of a definite rigid body displacement. Besides that, the measurement of the vibration amplitude field of an ultrasonic transducer is outlined.

Date Published: 12 April 1990
PDF: 10 pages
Proc. SPIE 1183, Holography '89, (12 April 1990); doi: 10.1117/12.963857

Published in SPIE Proceedings Vol. 1183:
Holography '89
Yuri N. Denisyuk; Tung H. Jeong, Editor(s)