Results 51 to 60 of about 72,954 (249)

Low-coherence off-axis digital holographic microscopy [PDF]

arXiv, 2021
Usually, off-axis digital holographic microscopy requires a coherent light source in order to record a full-field hologram. Nevertheless, a LASER-based illumination leads to a non-negligible coherent noise, decreasing then the imaging quality. We hereby report a simple method to reduce the coherent noise contribution using a low-temporal-coherence ...
arxiv  

Histomorphometric study of human thyroid follicles with digital holographic microscopy

Revista Cubana de Investigaciones Biomédicas, 2020
Introduction: Digital holographic microscopy has allowed optical microscopy to make use of numerical and computational tools, making multiple contributions to the study of cells and tissues in different fields of medicine and other related sciences ...
Nadia Inés Infante Tavio, Rafael Escalona Veloz, Lillian Sierra Calzado, Guillermo Palacios Roque   +3 more
doaj  

Early cell death detection with digital holographic microscopy.

PLoS ONE, 2012
BackgroundDigital holography provides a non-invasive measurement of the quantitative phase shifts induced by cells in culture, which can be related to cell volume changes.
Nicolas Pavillon, Jonas Kühn, Corinne Moratal, Pascal Jourdain, Christian Depeursinge, Pierre J Magistretti, Pierre Marquet   +6 more
doaj   +1 more source

High-resolution long-working-distance reference-free holographic microscopy exploiting speckle-correlation scattering matrix [PDF]

Phys. Rev. Applied 10, 024053 (2018), 2018
Using conventional refraction-based optical lens, it is challenging to achieve both high-resolution imaging and long-working-distance condition. To increase the numerical aperture of a lens, the working distance should be compensated, and vice versa.
arxiv   +1 more source

Parallel phase-shifting digital holographic microscopy [PDF]

Biomedical Optics Express, 2010
We propose parallel phase-shifting digital holographic microscopy (PPSDHM) which has the ability of three-dimensional (3-D) motion measurement using space-division multiplexing technique. By the PPSDHM, instantaneous information of both the 3-D structure and the phase distributions of specimens can be simultaneously acquired with a single-shot exposure.
Takashi Kakue, Kenzo Nishio, Osamu Matoba, Yuki Shimozato, Tatsuki Tahara, Kenichi Ito, Motofumi Fujii, Yasuhiro Awatsuji, Toshihiro Kubota, Shogo Ura   +9 more
openaire   +3 more sources

Energy Transfer from the Liquid Crystal Bulk to the Surface Enables Dynamic Topographies via Anisotropic Plasticized Networks

Advanced Materials Interfaces, EarlyView.
Surface topographical deformation is enhanced in liquid crystal polymer/oligomer network coatings by integrating nonreactive liquid crystal 5CB as a plasticizer, which facilitates the creation of dynamic polymer‐based solid optical devices. Abstract Surfaces with dynamic topographies play a pivotal role in modern technology by providing adaptable ...
Yuxin You, Zihua Chen, Gayalaxsa Nagalingam, Dirk J. Broer, Dong Yuan, Satoshi Aya, Danqing Liu   +6 more
wiley   +1 more source

Quantitative Phase Imaging Using Deep Learning-Based Holographic Microscope

Frontiers in Physics, 2021
Digital holographic microscopy enables the measurement of the quantitative light field information and the visualization of transparent specimens. It can be implemented for complex amplitude imaging and thus for the investigation of biological samples ...
Jianglei Di, Ji Wu, Kaiqiang Wang, Ju Tang, Ying Li, Jianlin Zhao   +5 more
doaj   +1 more source

Three dimensional tracking of gold nanoparticles using digital holographic microscopy [PDF]

Novel Biophotonic Techniques and Applications, Munich : Germany (2011), 2012
In this paper we present a digital holographic microscope to track gold colloids in three dimensions. We report observations of 100nm gold particles in motion in water. The expected signal and the chosen method of reconstruction are described. We also discuss about how to implement the numerical calculation to reach real-time 3D tracking.
arxiv   +1 more source

Multiple Incoherent Deconvolutions for Improving the Image Resolution of Diffraction‐Limited Imaging Systems

Advanced Photonics Research, EarlyView.
Multiple incoherent nonlinear deconvolutions (MIND) has extended dimension for optimization that provides a better solution than Wiener deconvolution and nonlinear reconstruction. MIND minimizes deconvolution noise by averaging over multiple deconvolutions each with different system aperture that effectively enhances the resolution.
Jawahar Prabhakar Desai, Vijayakumar Anand, Joseph Rosen   +2 more
wiley   +1 more source

Dark-field digital holographic microscopy for 3D-tracking of gold nanoparticles [PDF]

Optics Express 19, 27 (2011) 26044, 2011
We present a new technique that combines off-axis Digital Holography and Dark Field Microscopy to track 100nm gold particles diffusing in water. We show that a single hologram is sufficient to localize several particles in a thick sample with a localization accuracy independent of the particle position.
arxiv   +1 more source