Complex Pupil Masks for Aberrated Imaging of Closely Spaced Objects

Reddy, Andra Naresh Kumar; Sagar, D. Karuna; Хонина, С. Н.

doi:10.1134/s0030400x17120189

Cited by 19 publications

(3 citation statements)

References 17 publications

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“…Apodization can be employed for a variety of objectives, including suppressing optical sidelobes in an optical imaging system's diffraction field [16][17], enhancing depth of field [18][19][20][21][22], and improving resolution [23][24][25][26][27][28]. The effectiveness of the apodization technique is constantly linked to the design of pupil function.…”

Section: Introductionmentioning

confidence: 99%

Point Spread Functions of aberrated Leaky annular apertures with defocus

Sabitha

Rani

Venkanna³

et al. 2023

Preprint

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The point spread function of the optical system in the presence of defocus and primary spherical aberration with the complex Hanning filter with amplitude and phase has been investigated. A substantial improvement in the intensity profile of the impulse response of the optical system has been achieved. When the optical system is subjected to higher orders of aberration and apodization, the optical system behaves like a super-resolver with lateral resolution of the central peak being improved radically. The presence of first minima with zero intensity suits the optical system to be applied for two-point resolution studies in terms of Rayleigh criterion.

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Section: Introductionmentioning

confidence: 99%

Point Spread Functions of aberrated Leaky annular apertures with defocus

Sabitha

Rani

Venkanna³

et al. 2023

Preprint

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“…Using astigmatic transformations, vortex beams are formed from non-vortex fields 9,10 . The presence of some aberrations may increase the resolution in focusing and imaging systems [11][12][13][14] . Misalignment [15][16][17][18] in the formation of vortex beams can lead to the "splitting" of high-order optical vortices into firstorder components 19,20 .…”

Section: Introductionmentioning

confidence: 99%

Field at sharp focusing of shifted single-ring Laguerre–Gauss modes with circular polarization

Ustinov,

Khonina,

Golub

2023

Optical Technologies for Telecommunications 2022

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The report presents a theoretical and numerical analysis of the sharp focusing of a displaced Laguerre-Gauss single-ring mode with circular polarization based on the Richards-Wolf formulas. Expressions for the amplitude of the field components in the focal plane are obtained, while the case of "+"-polarization is considered in more detail. In addition to the general expression, the formula for intensity along the horizontal axis is given separately. It is more convenient for determining the displacement parameters than tracking them from the intensity pattern. Expressions are given for calculating the displacement value based on the intensity profile of the longitudinal component for large values of the vortex order. It is shown that for explicit asymmetry visualization it is advisable to use modes with a small but non-zero number.

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“…Apodization can be employed for a variety of objectives, including suppressing optical side-lobes in the diffraction field of optical imaging systems [18][19], enhancing the depth of field [20][21][22][23][24], and improving the resolution [25][26][27][28][29][30]. The effectiveness of the apodization technique is always connected to the design of pupil function.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Edge Ringing for the Optimization of Highly Aberrated Coherent Optical Systems

Shailaja,

Rao,

Sagar

et al. 2023

J. Sci. Res.

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The images of straight-edge objects formed by a coherent optical system with a circular aperture apodized with a shaded aperture have been studied. Image quality assessment parameters such as edge-ringing, edge-gradient, and edge-shift of the edge fringes have been investigated as a function of apodization parameters for various degrees of defocus, coma, and primary spherical aberrations. The reduction in the ringing pattern is more effective at the suitable combination of aberrations than the aberration-free cases and attains the minimum value for φd=2π where it is completely balanced with φd. It has been found that the image quality of straight-edge objects can be improved by combining specific aberrations with the appropriate apodizer.

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Complex Pupil Masks for Aberrated Imaging of Closely Spaced Objects

Cited by 19 publications

References 17 publications

Point Spread Functions of aberrated Leaky annular apertures with defocus

Point Spread Functions of aberrated Leaky annular apertures with defocus

Field at sharp focusing of shifted single-ring Laguerre–Gauss modes with circular polarization

Mitigation of Edge Ringing for the Optimization of Highly Aberrated Coherent Optical Systems

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