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Proceedings Paper

Tomographic Interferometry
Author(s): G. G. Levin; G. N. Vishnyakov
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Paper Abstract

Computorized tomography has been extensively used for investigation of the spatial distribution of refractive index resulting from optical probing /1/. The information about tomographic projections in such investigations is carried either by interferograms or shadow-grams. One first needs to process and decode the pictures to put the projection data into a computer. This procedure is rather time-conconsuming. Yet, there is quite a broad range of problems,such as nondestructive test of glass fiber manufacturing, express-analysis of plasma, aero- and hydrodynamic processes,which are characterized by a huge amount of experimental projection data and/or the requirement to obtain results in the real time scale. The authors have earlier proposed a one-step method for direct measurement of refractive index distribution patterns called tomo-graphic interferemetry /2/. The method essentially consists in combination of the probing step, i.e., obtaining projection data, with the following step of tomogram reconstruction which is done by analog processing in the optical systems of tomographic interferometers. Holographic interferometry technique is used to visualize the synthesized wave field that carries tomogram information.

Paper Details

Date Published: 1 February 1985
PDF: 4 pages
Proc. SPIE 0491, 16th Intl Congress on High Speed Photography and Photonics, (1 February 1985); doi: 10.1117/12.967909
Show Author Affiliations
G. G. Levin, All-Union Research Institute for Optical and Physical Measurements (USSR)
G. N. Vishnyakov, All-Union Research Institute for Optical and Physical Measurements (USSR)

Published in SPIE Proceedings Vol. 0491:
16th Intl Congress on High Speed Photography and Photonics
Michel L. Andre; Manfred Hugenschmidt, Editor(s)

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