Results 81 to 90 of about 72,954 (249)

Holographic Digital Fourier Microscopy for Selective Imaging of Biological Tissue [PDF]

arXiv, 2005
This paper presents an application of digital Fourier holography for selective imaging of scatterers with different sizes in turbid media such as biological tissues. A combination of Fourier holography and high-resolution digital recording, digital Fourier microscopy (DFM) permits crucial flexibility in applying filtering to highlight scatterers of ...
arxiv  

Separation of overlapped particles in digital holographic microscopy

Optics Express, 2013
In this paper, we present a procedure to separate aggregates of overlapped particles in digital holograms, based on a focus plane analysis applied to each particle. The method can be applied either on phase or on amplitude objects, according that each object has a border in one focus plane. Numerical simulations are performed to quantify the robustness
El Mallahi, Ahmed, Dubois, Frank
openaire   +4 more sources

Dynamic Multi‐Focus 3D Laser Nanoprinting Based on Two‐Step Absorption and Computational Holography

Laser &Photonics Reviews, EarlyView.
Low single‐focus laser powers in two‐step‐absorption 3D laser nanoprinting make parallelization efforts a viable route to increase print speeds while still relying on compact continuous‐wave lasers. Herein, an established two‐step‐absorption photoresist system with computational holography based on a digital micromirror device is combined in order to ...
Pascal Rietz, Paul Somers, Sebastian Kalt, Jonathan Ludwig Günter Schneider, Pascal Kiefer, Martin Wegener   +5 more
wiley   +1 more source

Automated Three-Dimensional Microbial Sensing and Recognition Using Digital Holography and Statistical Sampling

Sensors, 2010
We overview an approach to providing automated three-dimensional (3D) sensing and recognition of biological micro/nanoorganisms integrating Gabor digital holographic microscopy and statistical sampling methods.
Inkyu Moon, Faliu Yi, Bahram Javidi
doaj   +1 more source

Numerical focusing and the field of view in interference microscopy [PDF]

Компьютерная оптика, 2018
This paper presents an analysis of the effects occurring at the borders of the field of view in numerically focused imaging of optically defocused objects in interference microscopy systems with spatially coherent illumination of an object.
Anton Grebenyuk, Daria Klychkova, Vladimir Ryabukho   +2 more
doaj   +1 more source

Correction of phase drifts in two-wavelength digital holographic microscopy using secondary reference waves [PDF]

EPJ Web of Conferences
We present a two-wavelength digital holographic microscopy setup for surface topography measurement with single-point illumination and a method for correction of unwanted phase drifts using secondary reference waves.
Šarbort Martin, Čížek Martin, Pavelka Jan, Lazar Josef   +3 more
doaj   +1 more source

Long-range optofluidic control with plasmon heating

Nature Communications, 2021
Here, the authors combine digital holographic microscopy with thermoplasmonics in order to identify different contributions of thermally driven fluid dynamic phenomena. They find that local thermal perturbation leads to long-range changes in the dynamics
B. Ciraulo, J. Garcia-Guirado, I. de Miguel, J. Ortega Arroyo, R. Quidant   +4 more
doaj   +1 more source

Dual‐Band Metasurface‐Based Structured Light Generations for Futuristic Communication Applications

Small Science, EarlyView.
This study introduces a single‐cell‐driven dual‐band metasurface platform generating nondiffracting perfect vortex beams for Ultraviolet–Visible wavelengths. The metasurfaces, composed of silicon nitride nanoantennas, maintain high transmission efficiency across dual spectrums.
Muhammad Danial Shafqat, Yujin Park, Nasir Mahmood, Joohoon Kim, Dohyun Kang, Rehan Hafiz, Dongliang Gao, Humberto Cabrera, Muhammad Zubair, Muhammad Qasim Mehmood, Lei Gao, Junsuk Rho   +11 more
wiley   +1 more source

From Single to Multi‐Material 3D Printing of Glass‐Ceramics for Micro‐Optics

Small Methods, EarlyView.
This article explores advancements in two‐photon lithography (TPL) for fabricating high‐refractive‐index micro‐optics. It examines single and multi‐material 3D architectures in glass and ceramics (GLACEs), highlighting photoresin customization, critical fabrication conditions, and cross‐scale structural and optical characterization.
Joel Arriaga‐Dávila, Cristian Rosero‐Arias, Dirk Jonker, Margoth Córdova‐Castro, Josua Zscheile, Robert Kirchner, Alan Aguirre‐Soto, Robert Boyd, Israel De Leon, Han Gardeniers, Arturo Susarrey‐Arce   +10 more
wiley   +1 more source

Regulating Topographical Deformation Response of Liquid Crystal Coatings by Electrical Quenching of Liquid Crystal Order Fluctuation

Small Structures, EarlyView.
The suppression effect of electrical order quenching on the actuation of liquid crystal (LC) polymers is revealed. The LCs are aligned into homeotropic alignment, but with high electric field strength, to quench the order fluctuation of LCs. By engineering the electrode structures, invertible surface topography can be afforded taking advantage of this ...
Wei Feng
wiley   +1 more source