Results 81 to 90 of about 51,169 (250)

Depth-filtered digital holography

Optics Express, 2012
We introduce depth-filtered digital holography (DFDH) as a method for quantitative tomographic phase imaging of buried layers in multilayer samples. The procedure is based on the acquisition of multiple holograms for different wavelengths. Analyzing the intensity over wavelength pixel wise and using an inverse Fourier transform leads to a depth-profile
Martin R. Hofmann, Nils C. Gerhardt, Volker Jaedicke, Helge Wiethoff, Sebastian Goebel, Adamou Adinda-Ougba, Nektarios Koukourakis, Henning Höpfner   +7 more
openaire   +3 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

Novel Perspectives on the Characterization of Species-Dependent Optical Signatures of Bacterial Colonies by Digital Holography. [PDF]

PLoS ONE, 2016
The use of light diffraction for the microbiological diagnosis of bacterial colonies was a significant breakthrough with widespread implications for the food industry and clinical practice.
Igor Buzalewicz, Małgorzata Kujawińska, Wojciech Krauze, Halina Podbielska   +3 more
doaj   +1 more source

Calibration of an SKA-Low Prototype Station Using Holographic Techniques [PDF]

Radio Science, Volume 59, Issue 1, January 2024
Performance of digitally beamformed phased arrays relies on accurate calibration of the array by obtaining gains of each antenna in the array. The stations of the Square Kilometer Array-Low (SKA-Low) are such digital arrays, where the station calibration is currently performed using conventional interferometric techniques.
arxiv   +1 more source

Quantum Ghost Imaging by Sparse Spatial Mode Reconstruction

Advanced Quantum Technologies, EarlyView.
Hermite–Gaussian spatial modes are used in quantum ghost imaging for enhanced image reconstruction, by exploiting modal sparsity. By leveraging structured light as a basis for imaging, time‐efficient and high resolution quantum ghost imaging is achieved, paving the way for breakthroughs in low‐light, biological science applications.
Fazilah Nothlawala, Chané Moodley, Neelan Gounden, Isaac Nape, Andrew Forbes   +4 more
wiley   +1 more source

Speckle Reduction in Digital Holography by Fast Logistic Adaptive Non-Local Means Filtering

Photonics
Digital holography is a promising imaging technology. However, there is speckle noise in the reconstructed image of a digital hologram. Speckle degrades the quality of the reconstructed image.
Yiping Fu, Junmin Leng, Zhenqi Xu
doaj   +1 more source

Wavefront division digital holography

AIP Advances, 2018
Digital holography (DH), mostly Mach-Zehnder configuration based, belongs to non-common path amplitude splitting interference imaging whose stability and fringe contrast are environmental sensitive.
Wenhui Zhang, Liangcai Cao, Rujia Li, Hua Zhang, Hao Zhang, Qiang Jiang, Guofan Jin   +6 more
doaj   +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

Real‐Time Rendering Framework for Holography

Computer Graphics Forum, EarlyView.
Abstract With the advent of holographic near‐eye displays, the need for rendering algorithms that output holograms instead of color images emerged. These holograms usually encode phase maps that alter the phase of coherent light sources such that images result from diffraction effects.
Sascha Fricke, Susana Castillo, Martin Eisemann, Marcus Magnor   +3 more
wiley   +1 more source

Wavelength-Selective Phase-Shifting Digital Holography: Color Three-Dimensional Imaging Ability in Relation to Bit Depth of Wavelength-Multiplexed Holograms

Applied Sciences, 2018
The quality of reconstructed images in relation to the bit depth of holograms formed by wavelength-selective phase-shifting digital holography was investigated.
Tatsuki Tahara, Reo Otani, Yasuhiro Takaki   +2 more
doaj   +1 more source