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A Method for Laser Heterodyne Tomography of Reflection Gratings

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Optoelectronics, Instrumentation and Data Processing Aims and scope

Abstract

A method and physical and technical design of the laser heterodyne tomography of scattering properties of thick photosensitive materials (media) in the reflection mode are proposed. The method is based on the acoustooptic scanning of a test reflection grating recorded in the medium and on the layer-by-layer collinear heterodyne analysis of the scattered field. The formulas for estimating the spatial resolution capability of the method and the period of test grating are obtained, and the estimate of method’s sensitivity is given in the form of dependence of the heterodyne signal on the depth of grating layer positions. The theoretical conclusions of the work are confirmed experimentally.

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Funding

The study is supported by the Russian Foundation for Basic Research and by the Government of the Novosibirsk oblast (project no. 19-42-540005).

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Authors and Affiliations

  1. Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

    P. E. Tverdokhleb & Yu. A. Shchepetkin

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  1. P. E. Tverdokhleb
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  2. Yu. A. Shchepetkin
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Corresponding author

Correspondence to P. E. Tverdokhleb.

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Translated by E. Oborin

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Tverdokhleb, P.E., Shchepetkin, Y.A. A Method for Laser Heterodyne Tomography of Reflection Gratings. Optoelectron.Instrument.Proc. 56, 368–374 (2020). https://doi.org/10.3103/S8756699020040135

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  • DOI: https://doi.org/10.3103/S8756699020040135

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