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Proceedings Paper

Digital reconstruction of Young's fringes using Fresnel transformation
Author(s): Rudi Kulenovic; Yaozu Song; P. Renninger; Manfred Groll
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Paper Abstract

This paper deals with the digital numerical reconstruction of Young's fringes from laser speckle photography by means of the Fresnel-transformation. The physical model of the optical reconstruction of a specklegram is a near-field Fresnel-diffraction phenomenon which can be mathematically described by the Fresnel-transformation. Therefore, the interference phenomena can be directly calculated by a microcomputer.If additional a CCD-camera is used for specklegram recording the measurement procedure and evaluation process can be completely carried out in a digital way. Compared with conventional laser speckle photography no holographic plates, no wet development process and no optical specklegram reconstruction are needed. These advantages reveal a wide future in scientific and engineering applications. The basic principle of the numerical reconstruction is described, the effects of experimental parameters of Young's fringes are analyzed and representative results are presented.

Paper Details

Date Published: 21 November 1997
PDF: 8 pages
Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); doi: 10.1117/12.293401
Show Author Affiliations
Rudi Kulenovic, Univ. Stuttgart (Germany)
Yaozu Song, Tsinghua Univ. (China)
P. Renninger, Univ. Stuttgart (Germany)
Manfred Groll, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 3172:
Optical Technology in Fluid, Thermal, and Combustion Flow III
Soyoung Stephen Cha; James D. Trolinger; Masaaki Kawahashi, Editor(s)

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