Journal ArticleDOI
Super-resolution by pupil plane phase filtering
L. N. Hazra,N. Reza +1 more
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TLDR
This paper dwells upon the inverse problem of global optimization of the pupil function by phase filtering in accordance with the desired PSF.Abstract:
Resolution capability of any optical imaging system is limited by residual aberrations as well as diffraction effects. Overcoming this fundamental limit is called super-resolution. Several new paradigms for super-resolution in optical systems use ‘a posteriori’ digital image processing. In these ventures the three-dimensional point spread function (PSF) of the lens plays a key role in image acquisition. A straightforward tailoring of the PSF can be performed by appropriate pupil plane filtering. With a brief review of the state-of-art in this research area, this paper dwells upon the inverse problem of global optimization of the pupil function by phase filtering in accordance with the desired PSF.read more
Citations
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Journal ArticleDOI
Toraldo filters with concentric unequal annuli of fixed phase by evolutionary programming
N. Reza,Lakshminarayan Hazra +1 more
TL;DR: Investigations on the use of evolutionary programming to obtain globally or quasi-globally optimum solutions in synthesis of lossless Toraldo filters consisting of concentric unequal area zones of fixed phase are reported.
Journal ArticleDOI
Apodization of two-dimensional pupils with aberrations
Andra Naresh Kumar Reddy,Andra Naresh Kumar Reddy,Mahdieh Hashemi,Svetlana N. Khonina,Svetlana N. Khonina +4 more
TL;DR: In this article, the amplitude and phase masking in a ring aperture was used to enhance the resolution of the point spread function (PSF) of an optical system underneath defocussing and spherical aberrations.
Patent
Super resolution inspection system
TL;DR: In this paper, a system and method for inspecting a sample by illuminating the sample at a plurality of different angles and independently processing the resulting image streams is presented, which allows for retaining of frequency content that would otherwise be lost by averaging information from multiple imaging angles.
Journal ArticleDOI
Effects of aberrations on the point spread function and the two-point resolution with versatile apodization pupils
TL;DR: In this article, an amplitude-apodization pupil apodizer is presented for tailoring the point spread function (PSF), which results in a decreased fullwidth at half-maximum (FWHM) and suppressed sidelobes.
Journal ArticleDOI
Generation of sub-wavelength longitudinal magnetic probe and multiple spots using circularly polarized annular multi-Gaussian beam
TL;DR: Based on vector diffraction theory and inverse Faraday effect, the magnetization induced by a tightly focused circularly polarized annular multi-Gaussian beam was numerically studied in this paper.
References
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Book
Genetic algorithms in search, optimization, and machine learning
TL;DR: In this article, the authors present the computer techniques, mathematical tools, and research results that will enable both students and practitioners to apply genetic algorithms to problems in many fields, including computer programming and mathematics.
Book
Principles of Optics
TL;DR: In this paper, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Principles of Optics
TL;DR: In this article, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Journal ArticleDOI
Introduction to Fourier Optics
Joseph W. Goodman,Mary E. Cox +1 more
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.
Book
Introduction to Fourier optics
TL;DR: The second edition of this respected text considerably expands the original and reflects the tremendous advances made in the discipline since 1968 as discussed by the authors, with a special emphasis on applications to diffraction, imaging, optical data processing, and holography.