Hardware/Software Support for Correlation Detection in Holographic Wavefront Sensors

Ruchka, Pavel; Verenikina, Nina M.; Gritsenko, I. V.; Zlokazov, E. Yu.; Kovalev, M. S.; Krasin, George; Одиноков, С. Б.; Stsepuro, Nikita

doi:10.1134/s0030400x19100230

Cited by 15 publications

(12 citation statements)

References 20 publications

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“…Local maxima will appear when the value of the wave aberration in the CGH is a multiple of but not equal to the value thereof in the tested beam. This was described in more detail in [24]. The side lobes presence or absence on graphs is also determined by the signal-to-noise ratio.…”

Section: Resultsmentioning

confidence: 99%

“…A monochrome CMOS camera (Thorlabs CS2100M-USB, 1920 × 1080, pixel size 5.04 μm) was used to register the intensity distribution. In this work, a comparison between the proposed method ( Figure 3 b) and the method previously proposed on the basis of a physical Fourier transform lens [ 4 , 24 ] ( Figure 3 a) was made. It should be noted that to simulate and measure wavefront aberrations, Zernike polynomials were used.…”

Section: Resultsmentioning

confidence: 99%

“…To solve this problem, various normalized correlation metrics such as peak-to-sidelobe ratio (PSR) or peak-correlation energy (PCE) can be used [ 23 ]. In previous works of the authors [ 4 , 24 ], it was shown that convex optimization methods can be applied to solve the problem (1) in the range of

of wavefront aberrations, which can be increased up to ±5λ without loss in accuracy. Gradient descent, Newton’s method, or particle swarm are among of the lots of other methods [ 25 ], which could be implemented to solve the problem (1).…”

Section: Methodsmentioning

confidence: 99%

“…In previous works [4,24], the hologram was based on a sinusoidal grating; therefore, a large number of diffraction maxima were observed in the registration plane. However, their large number in the scheme proposed in this article does not lead to any positive effects.…”

Section: Modified Wavefront Aberration Measurement Algorithmmentioning

confidence: 99%

See 3 more Smart Citations

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Krasin

Kovalev

Stsepuro

et al. 2020

Sensors

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All of the existing holographic wavefront sensors are either bulky or have low accuracy of measuring wavefront aberrations. In this paper, we present an improvement of the holographic method of measuring wavefront aberrations using computer-generated Fourier holograms. The novelty of this work lies in the proposed approach to the synthesis of Fourier holograms, which are implemented using phase-only SLM. The main advantages of this method are the increased diffraction efficiency compared to the previously known methods, and the more compact implementation scheme due to the elimination of the conventional Fourier-lens. The efficiency of the proposed method was confirmed by numerical simulation and optical experiments.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Modified Wavefront Aberration Measurement Algorithmmentioning

confidence: 99%

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Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Krasin

Kovalev

Stsepuro

et al. 2020

Sensors

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show abstract

“…Стоит отметить, что при рассмотрении областей применения различных модуляторов следует исходить из их практических возможностей. Функциональная роль ПМС в современных системах фотоники весьма многогранна: в системах отображения информации [5], в оценке качества световых пучков [6][7][8][9], в голографических системах памяти [10,11], в различных корреляторах [12] и т. д.…”

Section: Introductionunclassified

Определение Функции Рассеяния Точки Компьютерно-Синтезированной Линзы, Сформированной Фазовым Модулятором Света

Сцепуро¹,

Красин²,

Ковалев³

et al. 2020

Журнал Технической Физики

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In various areas of photonics, there is a tendency to move from elements of physical optics to elements of flat optics, primarily due to reducing dimensions of instruments and devices. Usually, spatial light modulators are used to quickly output flat phase elements. In this paper, the possibility of replacing the optical system with a computer-generated lens was investigated. The novelty of the work lies in a comparative analysis of point spread functions formed by an optical system and a computer-synthesized lens. Numerous experiments confirm the result.

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Holographic wavefront sensors

Venediktov¹,

Gorelaya²,

Krasin³

et al. 2020

Quantum Electron.

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A brief historical review of the first designs of holographic wavefront sensors (WFS’s) and the concepts lying in their basis is presented. The main directions in the development of these sensors are highlighted and considered. One of these directions implies a two-stage transition from the use of several separate measuring channels with holograms filtering only one Zernike mode: first to the use of one channel with a multiplexed hologram filtering several first Zernike modes, and then to filtering the entire set of Zernike modes with the aid of one combined multiplexed hologram. Another line of research in this field (related to the first one) is the optimisation of the filter hologram structure in order to reduce cross-modulation interferences, increase multiplexing level, etc. One more line of research implements principles of dynamic holography by introducing spatial light modulators into the WFS composition. Hence, the advantages of time multiplexing of holograms can be used. The approach developed by G. Andersen’s team, aimed at adapting the holographic WFS design for operation as an element of adaptive optical system with a zonal corrector, as well as an approach implying development of hybrid holographic sensors, are considered separately. The results of the authors’ studies of holographic WFS’s with application of the methods of Fourier holography (i.e., holography of focused beams, in particular, using diffuse scatterers in a hologram recording channel) are also reported.

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Hardware/Software Support for Correlation Detection in Holographic Wavefront Sensors

Cited by 15 publications

References 20 publications

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Определение Функции Рассеяния Точки Компьютерно-Синтезированной Линзы, Сформированной Фазовым Модулятором Света

Holographic wavefront sensors

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