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Proceedings Paper

Pulsed TV holography: system description and some applications
Author(s): Staffan Schedin; Per Gren
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Paper Abstract

An all electronic double-pulsed TV holography system is described. Two separate image-plane holograms are recorded using a CCD camera. A small angular offset between the reference and object beams introduces carrier fringes in the image plane. Thus, the Fourier spectrum of the image contains distinct parts that can be filtered out and inverse transformed to yield the phase information. Experiments showing propagating transient bending waves in an aluminum plate generated by a focused laser pulse are performed. Phase maps of good quality are unwrapped and presented as 3D plots of the out-of-plane displacement. The system has also been used to evaluate the 3D distribution of transient acoustic fields in air generated by an electrical discharge. Several projections of the acoustic field is recorded and the 3D pressure field is reconstructed by computerized tomography.

Paper Details

Date Published: 25 September 1997
PDF: 8 pages
Proc. SPIE 3100, Sensors, Sensor Systems, and Sensor Data Processing, (25 September 1997); doi: 10.1117/12.287736
Show Author Affiliations
Staffan Schedin, Lulea Univ. of Technology (Germany)
Per Gren, Lulea Univ. of Technology (Sweden)

Published in SPIE Proceedings Vol. 3100:
Sensors, Sensor Systems, and Sensor Data Processing
Otmar Loffeld, Editor(s)

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