Calculation of diffractive optical elements for the formation of thin light sheet

Khorin, Pavel A.

doi:10.1088/1742-6596/1368/2/022014

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…We use an iterative algorithm that was previously successfully used to calculate a DOE shaping a diffraction-free beam of the “light sheet” type [ 72 ] suitable for fluorescence microscopy [ 73 , 74 ]. The iterative algorithm is based on the modeling of the action of the lens using the Fourier transform and superimposing the annular diaphragm in the spectrum plane ( Figure 1 ).…”

Section: Methodsmentioning

confidence: 99%

Composite Diffraction-Free Beam Formation Based on Iteratively Calculated Primitives

2023

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To form a diffraction-free beam with a complex structure, we propose to use a set of primitives calculated iteratively for the ring spatial spectrum. We also optimized the complex transmission function of the diffractive optical elements (DOEs), which form some primitive diffraction-free distributions (for example, a square or/and a triangle). The superposition of such DOEs supplemented with deflecting phases (a multi-order optical element) provides to generate a diffraction-free beam with a more complex transverse intensity distribution corresponding to the composition of these primitives. The proposed approach has two advantages. The first is the rapid (for the first few iterations) achievements of an acceptable error in the calculation of an optical element that forms a primitive distribution compared to a complex one. The second advantage is the convenience of reconfiguration. Since a complex distribution is assembled from primitive parts, it can be reconfigured quickly or dynamically by using a spatial light modulator (SLM) by moving and rotating these components. Numerical results were confirmed experimentally.

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Section: Methodsmentioning

confidence: 99%

Composite Diffraction-Free Beam Formation Based on Iteratively Calculated Primitives

2023

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“…The thickness of the ring determines the length of the diffraction-free region in the longitudinal direction (in inverse proportion). Previously, a DOE was calculated to form a diffraction-free beam of the "light sheet" 39 type suitable for fluorescence microscopy [40][41][42] . The applied iterative algorithm is based on modeling the action of the lens using the Fourier transform and superimposing an annular aperture on the spectrum 43 .…”

Section: Theoretical Foundationsmentioning

confidence: 99%

“…Ideally, the thickness of the ring can be represented as an infinitesimal value; Such an arbitrary field, which has diffraction-free properties, can be calculated on the basis of the Whittaker integral [45][46][47] . Also, in papers 39,48 , it is considered in detail how the parameters of the presented iterative algorithm and the intensity/phase distribution on annular diaphragms affect the diffraction-free properties of the beam and its structure.…”

Section: Numerical Simulationmentioning

confidence: 99%

Calculation of a diffraction-free beam with the given transverse intensity distribution using an iterative algorithm

Khorin,

Volotovsky

2023

Optical Technologies for Telecommunications 2022

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It is proposed to use an iterative algorithm based on a ring spectrum and a lens to calculate a diffraction-free beam with a given transverse intensity distribution. In this work, we calculated and studied diffractive optical elements (DOEs) that form some primitive non-diffraction distributions (for example, a square and a triangle, as well as more complex grayscale distributions). It is shown that the iterative algorithm is stagnating, i.e. the number of iterations is directly related to the root mean square error. The mean square deviation of the formed transverse intensity distribution from the given primitive does not exceed 0.006 for a triangle primitive, 0.015 for a square primitive, and 0.07 for a high-contrast halftone image.

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Simulation of the action of a three-dimensional nonlinear spiral phase plate in the near diffraction zone

Khorin

Ustinov

2020

J. Phys.: Conf. Ser.

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The report investigates the action of a nonlinear spiral phase plate in the near diffraction zone, taking into account the three-dimensional structure of the optical element. Simulation of the diffraction of a Gaussian beam with linear polarization is performed on the basis of the finite difference in the time domain method. Numerical comparison of the action of linear and nonlinear phase plates showed a difference in their action at distancing from the optical element.

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Calculation of diffractive optical elements for the formation of thin light sheet

Cited by 3 publications

References 35 publications

Composite Diffraction-Free Beam Formation Based on Iteratively Calculated Primitives

Composite Diffraction-Free Beam Formation Based on Iteratively Calculated Primitives

Calculation of a diffraction-free beam with the given transverse intensity distribution using an iterative algorithm

Simulation of the action of a three-dimensional nonlinear spiral phase plate in the near diffraction zone

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