The optical refractometry using transport-of-intensity equation

Gritsenko, I. V.; Kovalev, M. S.; Stsepuro, Nikita; Gulina, Yulia; Krasin, George; Gonchukov, S A; Kudryashov, S. I.

doi:10.1088/1612-202x/ac7136

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…Несмотря на вышеупомянутое ограничение, данный метод можно использовать и для оценки значения показателя преломления оптической линзы [4]. При этом алгоритм расчёта остается неизменным вплоть до последнего этапа, а для определения значения показателя преломления необходима априорная информация о радиусе кривизны сферической поверхности.…”

Section: результаты и обсуждениеunclassified

“…В связи с этим в приложениях оптической метрологии традиционная оценка распределений интенсивности и фазы лучей, распространяющихся через систему, на основе явления интерференции и геометрической оптики перестала удовлетворять практическим нуждам оптимизации оптических систем. Поэтому актуальна проблема анализа систем с высоким разрешением в режиме реального времени на основе свойств оптических сигналов [1][2][3][4].…”

Section: Introductionunclassified

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Measurement of the radius of curvature of a spherical surface based on the transport-of-intensity equation

Stsepuro¹,

Kovalev²,

Krasin³

et al. 2022

Computer Optics

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The transport-of-intensity equation provides a new non-interferometric and non-iterative access to quantitative information about the phase of a light wave by measuring intensity distributions. This equation can be used to implement a simple and accurate spatial phase measurement for optical testing of spherical surfaces. The method requires only a CMOS camera, which records transverse field intensity distributions in several planes. Processing of experimental measurements with specialized software allows one to reconstruct the value of the radius of curvature of the spherical surface under test with high accuracy. The method is compared with measurements made by an interferometer, showing the difference between the values of the surface radius of curvature to be 0.01 % or less and indicating good agreement of the results.

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Section: результаты и обсуждениеunclassified

Section: Introductionunclassified

Measurement of the radius of curvature of a spherical surface based on the transport-of-intensity equation

Stsepuro¹,

Kovalev²,

Krasin³

et al. 2022

Computer Optics

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“…The transport-of-intensity equation (TIE) is a well-established deterministic phase retrieval approach which can be used for quantitative measurements of bulk and surface characteristics of transparent media by analyzing phase distributions [19]. For instance, quantitative phase imaging of objects under study can be used to measure their refractive index [20,21], thickness, mass, birefringence and magnetic properties [22,23].…”

Section: Introductionmentioning

confidence: 99%

Surface Depth-Mapping of Material via the Transport-of-Intensity Equation

et al. 2022

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We present a new approach for a surface characterization based on the TIE method combined with the SEM. Experimental verification is carried out on the example of characterization of a crater on the surface of monocrystalline silicon (111). The approach is universal and can be used for any opaque object. It improves the robustness and stability of the quantitative phase retrieval process and has two important features. Firstly, it allows one to quantitatively retrieve the phase in a region of arbitrarily chosen dimensions. Secondly, phase retrieval process does not require the choice of boundary conditions.

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