Tomographic Interferometry

G. G. Levin; G. N. Vishnyakov

doi:10.1117/12.967909

1 February 1985 Tomographic Interferometry

G. G. Levin, G. N. Vishnyakov

Proceedings Volume 0491, 16th Intl Congress on High Speed Photography and Photonics; (1985) https://doi.org/10.1117/12.967909
Event: 16th International Congress on High Speed Photography and Photonics, 1984, Strasbourg, France

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.

Citation Download Citation

G. G. Levin and G. N. Vishnyakov "Tomographic Interferometry", Proc. SPIE 0491, 16th Intl Congress on High Speed Photography and Photonics, (1 February 1985); https://doi.org/10.1117/12.967909

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