Publication

Back to overview Show all

Original article (peer-reviewed)

Journal ФИЗИЧЕСКИЕ ОСНОВЫ ПРИБОРОСТРОЕНИЯ
Volume (Issue) 6(1)
Page(s) 34 - 49
Title of proceedings ФИЗИЧЕСКИЕ ОСНОВЫ ПРИБОРОСТРОЕНИЯ

Open Access

URL https://elibrary.ru/item.asp?id=29679227
Type of Open Access Green OA Embargo (Freely available via Repository after an embargo)

Abstract

The paper presents the theoretical and probabilistic foundation for a new technique of coherent ultra-wideband sensing for three-dimensional tomographic imaging of the internal structure of semitransparent media. Imaging involves test media illumination with a planar collimated beam, its spectral decomposition, holographic processing of spatial spectra of reference and scattered signals, followed by reconstruction of a volumetric image using tomographic methods. For the first time, a stochastic model of the image has been proposed and is considered in terms of coherent signal processing when the radiation spectrum is shifted to the low-frequency band and projected on the image sensor. The statistical characteristics of the high-frequency signal in immediate vicinity of the image sensor surface have been determined. A statistical description of the image constructed from the spectral data obtained at the image sensor output is given. The correlation characteristics of the speckle structure of the reconstructed image have been investigated. The instrument function of the optical coherence tomography system implementing the proposed method has been derived and studied.
-