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Optical Engineering

Application Of Pulsed Reflection Holography To Material Testing
Author(s): R. L. van Renesse; J. W. Burgmeijer
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Paper Abstract

When holography is applied outside the laboratory, some well-known problems are encountered: vibrations, rigid-body motion, and stray daylight. Pulsed holography can overcome the difficulties with vibrations, but the other problems are less easily solved. When the object area to be holographically tested is small, a very simple and conve-nient method may be employed, which was described independently by Boone (1974) and Neumann and Penn (1975). They fixed the hologram holder rigidly to the object under test, thus avoiding rigid-body motion of the object with respect to the hologram. In a similar configuration Denisyuk reflection holograms are made without any necessity of darkening the environment. The authors believe that the main reason this technique is not widely used is due to difficulties generally encountered in processing the Denisyuk hologram to good quality. This paper describes a simple processing technique that results in high quality reflection holograms that may be analyzed by microscope up to interference fringe densities of about 30 fringes/mm. As examples, the results of a projectile impact study and the study of early fatigue crack detection in a critical airplane structure are presented.

Paper Details

Date Published: 1 December 1985
PDF: 7 pages
Opt. Eng. 24(6) doi: 10.1117/12.7973634
Published in: Optical Engineering Volume 24, Issue 6
Show Author Affiliations
R. L. van Renesse, Institute of Applied Physics TNO (The Netherlands)
J. W. Burgmeijer, Institute of Applied Physics TNO (The Netherlands)


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