Tomographic Presentation Of Temperature Profiles In A Convective Heat Flow By High Resolution Holographic Interferometry

D. Vukicevic; H. Jager; T. Neger; H. Philipp; J. Woisetchlager

doi:10.1117/12.968824

16 January 1988 Tomographic Presentation Of Temperature Profiles In A Convective Heat Flow By High Resolution Holographic Interferometry

D. Vukicevic, H. Jager, T. Neger, H. Philipp, J. Woisetchlager

Author Affiliations +

Proceedings Volume 0952, Laser Technologies in Industry; (1988) https://doi.org/10.1117/12.968824
Event: Laser Technologies in Industry, 1988, Porto, Portugal

Abstract

The aim of these investigations is the development of a new experimental setup, allowing multidirectional analysis of phase objects by high resolution holographic interferometry. With this setup it is possible to obtain interferograms of finite width covering a range of view of 155°. The first tests were performed on a stabilized convective heat flow, since its temperature distribution could be measured with an NTC-detector, providing reference data to check the quality of the tomographic reconstructions. To obtain highest resolution of the interferometric data, the holographic interferograms were evaluated using the formalism of the fast Fourier transformation (FFT). The distributions of the index of refraction were obtained by two commonly used tomographic reconstruction procedures: the convolution method and the algebraic reconstruction technique (ART) showing better results, especially if the projection data are not completely covering 180° of view.

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D. Vukicevic, H. Jager, T. Neger, H. Philipp, and J. Woisetchlager "Tomographic Presentation Of Temperature Profiles In A Convective Heat Flow By High Resolution Holographic Interferometry", Proc. SPIE 0952, Laser Technologies in Industry, (16 January 1988); https://doi.org/10.1117/12.968824

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