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Article
Investigation of irregular apertures and applications in confocal microscopy and speckle imaging
I suggest an irregular aperture and calculate the impulse response, or the point spread function (PSF) corresponding to this aperture. In addition, I calculated the PSF in the case of rotated irregular apertur...
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Article
Monte Carlo simulation of Hermite Gaussian laser beam in turbid medium
We considered the higher-order TEMn,m modes in the laser illumination of a turbid medium. Then, we applied the Monte Carlo technique to the Hermite Gaussian beam as well as on the turbid medium. Hence, we extract...
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Article
Investigation of a concentric black and white hexagonal pupil and its application in confocal microscopic imaging
We constructed a new concentric black and white (B/W) hexagonal aperture, and we resized the image in a matrix of dimensions 1024 × 1024 pixels using MATLAB code. We derived a new formula for the point spread ...
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Article
Compromising of resolution and contrast in obstructed Cauchy aperture and its application in confocal microscopy
We designed an obstructed Cauchy filter to improve the microscope resolution, and we calculated the point spread function (PSF) considering the Fourier transform operation deduced from the known Fraunhofer dif...
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Article
Application of a hexagonal aperture on the confocal scanning laser microscope
We suggested the hexagonal aperture to compute the point spread function (PSF) by making use of scalar diffraction theory and Fourier operations. We have got an analytical formula for the PSF corresponding to ...
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Article
The contrast of speckle images using viscous fluid flows
We have obtained a novel formula for the contrast of speckle images considering the Voigt distribution using Fraunhofer diffraction and convolution operations. An experiment on speckle formation using fluid fl...
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Article
Open AccessThe computation of the average speckle size from the point spread function for triangular apertures
We suggest triangular aperture modeling for the computation of speckle size using the point spread function (PSF) concept. The fast Fourier transform (FFT) algorithm indicates three models of triangular apertu...
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Article
Open AccessInvestigation of rectangular apertures and their application on speckle imaging
An aperture in the form of four squares arranged symmetrically along the cartesian coordinates with equal distances from the center investigated. Three models are suggested in the computation of the Point Spre...
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Article
Open AccessInvestigation of a new modulated aperture using speckle techniques
A design of equally spaced eight-circles placed at equal distances from the origin is suggested. Three models corresponding to the eight-circle design considering conic, linear, and quadratic distributions are...
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Article
Open AccessA hyper-resolving polynomial aperture and its application in microscopy
A hyper-resolving aperture composed of a polynomial distribution is suggested. The point spread function (PSF) is computed and compared with that corresponding to linear, quadratic, and circular apertures. In ...
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Article
Speckle imaging of annular Hermite Gaussian laser beam
Fourier transform (FT) corresponding to the diffuser has a comb function realised from uniform illumination, and hence the speckle image is nearly equal to comb point spread function (PSF). Consequently, the r...
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Article
Open AccessReconstruction of images in non-scanned confocal microscope (NSCM) using speckle imaging
The common formation of images in CSLM assumes mechanically scanned object placed in the common short focus of the objective lenses of the microscope, while in the arrangement under study, the scanning of the ...
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Article
Contrast of laser speckle images using some modulated apertures
Using the same diffuser, linear, quadratic and Hamming apertures can form static speckle images. The distribution of the obtained speckle images using modulated apertures is computed by examining the full widt...
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Article
Effects of localized blowing on the turbulent boundary layer over 2D roughness
Planar particle image velocimetry was utilized to investigate the effects of localized blowing (injection) on the turbulent boundary layer over two-dimensional k-type roughness. The experiments were performed at ...
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Article
Image processing of Ramses II statue using speckle photography modulated by a new Hamming linear aperture
In this paper, a new concentric Hamming linear aperture is suggested. The point spread function (PSF) is computed for concentric Hamming linear aperture and it is compared with the corresponding circular, conv...
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Article
Onset of the Jet Quenching Phenomenon
The aim of this study is to set a baseline for the jet quenching measurements of the Quark Gluon Plasma formed in the large system size Nucleus-Nucleus (A-A) at top central collisions, via studying simulated smal...
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Article
Turbulent boundary layer around 2D permeable and impermeable obstacles
An experimental investigation of the turbulent boundary layer around 2D permeable and impermeable obstacles was carried out using high-resolution particle image velocimetry (PIV) in a large-scale refractive-in...
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Article
Flow around a semicircular cylinder with passive flow control mechanisms
Wind tunnel experiments were performed to study the effect of passive flow control strategies on the wake and drag of a semicircular cylinder of infinite aspect ratio. High-resolution planar particle image vel...
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Article
Step index fibre using laser interferometer
A model is suggested to describe the fringe shift which occurs due to the phase variations of cladded glass fibre introduced between the two plates of the liquid wedge interferometer illuminated with a He–Ne l...
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Article
Open AccessModified fragmentation function in heavy ion collisions at RHIC via direct γ-jet measurements
The presented results are the first measurements at RHIC for direct γ-charged hadron azimuthal correlations in heavy ion collisions. We use these correlations to study the color charge density of the medium throu...
