With a well known holographic setup we can determine the three dimensional displacement vector with only one single holographic plate. The probe must be imaged by a lens onto the photoplate and holographically recorded with a plane reference wave. Using an unexpanded laser beam, we can reconstruct the interesting spots of the object whose displacement we want to determine. Due to the displacement we can see interference fringes on the real image. The shape of the fringes are tightly bound to the displacement of the spot that we are reconstructing. The direction and the curvature give us the three absolute coordinates of the displacement vector.

Date Published: 26 October 1983
PDF: 6 pages
Proc. SPIE 0398, Industrial Applications of Laser Technology, (26 October 1983); doi: 10.1117/12.935355

Published in SPIE Proceedings Vol. 0398:
Industrial Applications of Laser Technology
William F. Fagan, Editor(s)