On the Possibilities of Encoding Digital Images Using Fractional Fourier Transform

Ruchka, Pavel; Galkin, M. L.; Kovalev, M. S.; Krasin, George; Stsepuro, Nikita; Одиноков, С. Б.

doi:10.3103/s1060992x19040052

Cited by 4 publications

(1 citation statement)

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“…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

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: Introductionunclassified