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Proceedings Paper

Time average holography project
Author(s): Shawn M. Grannell; Marian P. Shih
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Paper Abstract

We used time average holography to study the propagation of transverse standing waves in thin metal rods. Theory predicts that the phase velocity of the standing waves depends on the rod material, cross section geometry, and the driving frequency. Time average holography was used to record the standing wave pattern produced in a rod, and from the standing wave pattern the phase velocity was determined. The phase velocity results were then compared to the phase velocity theory. Standing waves were excited at frequencies ranging from 1 kHz to 16 kHz. Circular rods with diameters of 1.30 cm and 1.90 cm were used, and the rod materials were steel, brass, and aluminum. The experiment is described in detail and the interpretation of time average holograms is explained for the benefit of students. The question of what happens in a time average hologram when more than one mode of oscillation is present in the rod is also explored.

Paper Details

Date Published: 3 October 2000
PDF: 11 pages
Proc. SPIE 4149, Holography 2000, (3 October 2000); doi: 10.1117/12.402503
Show Author Affiliations
Shawn M. Grannell, Saginaw Valley State Univ. (United States)
Marian P. Shih, Saginaw Valley State Univ. (United States)

Published in SPIE Proceedings Vol. 4149:
Holography 2000
Tung H. Jeong; Werner K. Sobotka, Editor(s)

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