Results 81 to 90 of about 35,274,744 (211)

Generating Helical Polymorphic Beams Using Dielectric Metasurfaces

Laser &Photonics Reviews, EarlyView.
Helix‐shaped polymorphic beams are optical fields whose intensity maxima spiral around the propagation axis, enabling particle manipulation through attractive or repulsive forces. Traditionally requiring expensive spatial light modulators, metasurfaces now provide a compact, cost‐effective alternative. This work demonstrates general helical polymorphic
Maryam Setareh, Yang Xu, Jose A. Rodrigo, Kenneth B. Crozier   +3 more
wiley   +1 more source

Multiwavelength digital holography in the presence of vibrations: laterally resolved multi-step phase-shift extraction

, 2019
Paper Tu4B.5, 2 S.With the application of multiwavelength digital holography in rough environments such as machine tools, we cannot rely on the complete absence of vibration.
Tobias Beckmann, Markus Fratz, Alexander Bertz, Daniel Carl, Carl, Daniel, Lasse Bienkowski, Beckmann, Tobias, Bertz, Alexander, Seyler, Tobias, Tobias Seyler, Bienkowski, Lasse, Fratz, Markus   +11 more
core   +1 more source

Compact Single‐Shot Incoherent Edge Detection With a Polarization‐Multiplexed Metalens

Laser &Photonics Reviews, EarlyView.
A polarization‐sensitive metalens enables single‐shot incoherent edge detection by generating two polarization‐dependent images and digitally subtracting them to realize a high‐pass optical transfer function. ABSTRACT Edge detection under incoherent illumination is highly desirable for compact vision systems but remains challenging due to the lack of ...
Weiyan Li, Xiaotong Li, Youngsun Jeon, Hyeonsu Heo, Jaekyung Kim, Gyeongtae Kim, Shiqi Hu, Minsu Jeong, Cherry Park, Seokho Lee, Le Dai, Mu Qiao, Qi Zheng, Zheng Zhu, Zhaogang Dong, Chunying Guan, Jinhui Shi, Junsuk Rho   +17 more
wiley   +1 more source

Imaging analysis of digital holography

Optics Express, 2005
In this study we focus on understanding the system imaging mechanisms given rise to the unique characteristic of discretization in digital holography. Imaging analysis with respect to the system geometries is investigated and the corresponding requirements for reliable holographic imaging are specified.
Lei, Xu, Xiaoyuan, Peng, Zhixiong, Guo, Jianmin, Miao, Anand, Asundi   +4 more
openaire   +2 more sources

Resolution improvement methods applied to digital holography [PDF]

This thesis discusses the creation, acquisition and processing of digital holograms. Several techniques to improve the optical resolution have been investigated and developed.
Claus, Daniel
core  

The reconstruction of digital holograms on a computational grid [PDF]

, 2006
Digital holography is greatly extending the range ofholography's applications and moving it from the lab into the field: a single CCD or other solid-state sensor can capture any number of holograms while numerical reconstruction within a computer ...
Nebrensky, JJ, P. R. Hobson, J. J. Nebrensky, Hobson, PR   +3 more
core   +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

Three‐Dimensional Optical and Computational Reconstruction of Colloidal Electrokinetic Flows via Multiplane Imaging and Multiscale Modeling

Small, EarlyView.
Fast 3D multiplane microscopy is combined with multiscale electrokinetic modeling to reconstruct nanoparticle motion around quadrupolar electrodes. This integrated optical‐computational framework reveals the full three‐dimensional structure of colloidal electrokinetic flows, including localized trapping, depletion layers, and complex vortical motion ...
Flip de Jong, Pablo Diez‐Silva, Jui‐Kai Chen, Raúl P. Peláez, Sudipta Seth, Bing‐Yang Shih, Senne Fransen, Radin Tahvildari, Kruti Trivedi, Rémi Pelletier, Harishankar Balakrishnan, Carmen Hervés‐Carrete, Carlos Renero‐Lecuna, Willem Van Roy, Maarten Rosmeulen, Santi Nonell, Susana Rocha, Andrey Klymchenko, Luis M. Liz‐Marzán, Roger Bresolí‐Obach, Manuel I. Marqués, Johan Hofkens, Rafael Delgado Buscalioni, Boris Louis   +23 more
wiley   +1 more source

Application of Infrared Digital Holography for Characterization of Inhomogeneities and Voluminous Defects of Single Crystals on the Example of ZnGeP₂

Applied Sciences, 2020
In this work, the method of IR digital holography intended for detection of volumetric defects in ZnGeP2 single crystals has been tested. The holographic method is verified by a comparison of the results obtained with the data obtained by other methods ...
Victor Dyomin, Alexander Gribenyukov, Sergey Podzyvalov, Nikolay Yudin, Mikhail Zinoviev, Igor Polovtsev, Alexandra Davydova, Alexey Olshukov   +7 more
doaj   +1 more source

Improving ARTs: Microfluidics as a Tool for Sperm Selection

Andrology, EarlyView.
ABSTRACT Sperm selection is a critical step in assisted reproductive technology (ART), as sperm quality directly influences embryo quality. In vivo, the female reproductive tract imposes several physical and physiological barriers that favors only the most optimal spermatozoa reaching the fertilization site.
A. Pérez‐Gómez, A. Urriés, J. L. de Pablo, L. Serrano‐Ramón, S. Sanchez, R. Herrer, J. M. Morrell, C. Malo   +7 more
wiley   +1 more source