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Nanosphere Self-Assembly Imaging Systems and Defect Detection Algorithms for Self-Assembled Structures: A Review [PDF]

open access: yesNanomaterials
Self-assembled nanosphere structures are widely used as bottom-up platforms for ordered micro- and nanostructures, with applications in photonic crystals, sensing platforms, functional coatings, drug delivery, and nanosphere lithography.
Qihang Liu   +8 more
doaj   +2 more sources

Numerical Simulation of Performance Improvement of Underwater Lidar by Using a Spiral Phase Plate as Spatial Filter

open access: yesIEEE Photonics Journal, 2022
In turbid water, target reflected lidar signal is easily buried in “clutter” due to scattering. We proposed an underwater laser ranging model applying an optical vortex in the receiver to separate the scattering clutter from the target ...
YingQi Liao   +6 more
doaj   +1 more source

Experimental demonstration of extended depth-of-field f/1.2 visible High Definition camera with jointly optimized phase mask and real-time digital processing [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2015
Increasing the depth of field (DOF) of compact visible high resolution cameras while maintaining high imaging performance in the DOF range is crucial for such applications as night vision goggles or industrial inspection.
Burcklen M.-A.   +13 more
doaj   +1 more source

A Multi-Plane Augmented Reality Head-Up Display System Based on Volume Holographic Optical Elements With Large Area

open access: yesIEEE Photonics Journal, 2021
The traditional head-up display (HUD) system has the disadvantages of a small area and a single display plane, here we propose and design an augmented reality (AR) HUD system with multi-plane, large area, high diffraction efficiency and a single picture ...
Zhenlv Lv, Juan Liu, Liangfa Xu
doaj   +1 more source

Simulation Analysis of a Wavefront Reconstruction of a Large Aperture Laser Beam

open access: yesSensors, 2023
In order to solve the problem of atmospheric influence on the far-field measurement of the quality of a laser beam, we proposed a direct wavefront measurement system based on the Hartmann detection principle, which can measure large apertures and high ...
Gangyu Wang   +4 more
doaj   +1 more source

Advanced Imaging Methods Using Coded Aperture Digital Holography

open access: yesEngineering Proceedings, 2023
Optical imaging has been utilized in nature and technology for decades. Recently, new methods of optical imaging assisted by computational imaging techniques have been proposed and demonstrated.
Joseph Rosen
doaj   +1 more source

Biomedical applications of Jones-matrix tomography to polycrystalline films of biological fluids [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2019
Algorithms for reconstruction of linear and circular birefringence-dichroism of optically thin anisotropic biological layers are presented. The technique of Jones-matrix tomography of polycrystalline films of biological fluids of various human organs has
V. A. Ushenko   +9 more
doaj   +1 more source

It is a sufficient condition only, not a necessary and sufficient condition, for decomposing wavefront aberrations

open access: yesJournal of the European Optical Society-Rapid Publications, 2022
The classic equation for decomposing the wavefront aberrations of axis-symmetrical optical systems has the form, W ( h 0 , ρ , ϕ ) = ∑ j = 0 ∝ ∑ p = 0 ∝ ∑ m = 0 ∝ C 2 j + m 2 p + m m ( h 0 ...
Lin Psang
doaj   +1 more source

Automated Optical Flow Based Registration for Adaptive Optics Scanning Laser Ophthalmoscope

open access: yesIEEE Photonics Journal, 2020
This study presents an automated registration method based on optical flow for an adaptive optics scanning laser ophthalmoscope. The method was designed to align and average images to obtain a higher signal-to-noise ratio image.
Yiwei Chen   +6 more
doaj   +1 more source

Smartphone microendoscopy for high resolution fluorescence imaging [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2016
High resolution optical endoscopes are increasingly used in diagnosis of various medical conditions of internal organs, such as the cervix and gastrointestinal (GI) tracts, but they are too expensive for use in resource-poor settings.
Xiangqian Hong   +3 more
doaj   +1 more source

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