The Role of Scattering in Quasi-Ordered Structures for Terahertz Imaging: Local Order Can Increase an Image Quality
Dolganova I. N., Zaytsev K. I., Yurchenko S. O., Karasik V. E., Tuchin V. V.
IEEE Transactions on Terahertz Science and Technology
Vol.8, Issue4, P. 403-409
Опубликовано: 2018
Тип ресурса: Статья
DOI:10.1109/TTHZ.2018.2844104
Аннотация:
In this paper, we propose a computational approach for description of radiation transfer in a quasi-ordered medium and study the impact of scattering on electromagnetic wave propagation and image formation. It combines finite-difference time-domain method, Monte Carlo simulations, and radiative transfer theory. Using, as an example, terahertz (THz) imaging, we analyze the modulation transfer function (MTF) of the imaging system operated at 0.25 THz for scattering material layers placed between the object and the imaging plane. We experimentally study imaging of bar-pattern test objects through a quasi-ordered scattering medium. Both numerical and experimental results are in good agreement and demonstrate an impact of quasi-ordered scatterers on quality of THz images, i.e., particular combination of the electromagnetic wavelength and parameters of scattering materials could enhance MTF compared with ones with random particle structures. © 2018 IEEE.
Ключевые слова:
Image resolution; radiation transfer theory; scattering; terahertz imaging systems
Computation theory; Computational electromagnetics; Electromagnetic wave propagation; Image enhancement; Intelligent systems; Monte Carlo methods; Optical transfer function; Time domain analysis; Computational approach; Electromagnetic wavelengths; Modulation transfer function (MTF); Ordered structures; Radiation transfer; Radiative transfer theory; Scattering materials; Scattering medium; Finite difference time domain method
Язык текста: Английский
ISSN: 2156-342X
Dolganova I. N. Irina Nikolaevna 1988-
Zaytsev K. I. Kirill Igorevich 1989-
Yurchenko S. O.
Karasik V. E.
Tuchin V. V.
Долганова И. Н. Ирина Николаевна 1988-
Зайцев К. И. Кирилл Игоревич 1989-
Юрченко С. О.
Карасик В. Е.
Тючин В. В.
The Role of Scattering in Quasi-Ordered Structures for Terahertz Imaging: Local Order Can Increase an Image Quality
Текст визуальный непосредственный
IEEE Transactions on Terahertz Science and Technology
Vol.8, Issue4 P. 403-409
2018
Статья
Image resolution radiation transfer theory scattering terahertz imaging systems
Computation theory Computational electromagnetics Electromagnetic wave propagation Image enhancement Intelligent systems Monte Carlo methods Optical transfer function Time domain analysis Computational approach Electromagnetic wavelengths Modulation transfer function (MTF) Ordered structures Radiation transfer Radiative transfer theory Scattering materials Scattering medium Finite difference time domain method
In this paper, we propose a computational approach for description of radiation transfer in a quasi-ordered medium and study the impact of scattering on electromagnetic wave propagation and image formation. It combines finite-difference time-domain method, Monte Carlo simulations, and radiative transfer theory. Using, as an example, terahertz (THz) imaging, we analyze the modulation transfer function (MTF) of the imaging system operated at 0.25 THz for scattering material layers placed between the object and the imaging plane. We experimentally study imaging of bar-pattern test objects through a quasi-ordered scattering medium. Both numerical and experimental results are in good agreement and demonstrate an impact of quasi-ordered scatterers on quality of THz images, i.e., particular combination of the electromagnetic wavelength and parameters of scattering materials could enhance MTF compared with ones with random particle structures. © 2018 IEEE.