Resolution Enhancement in Terahertz Digital In-line Holography by Sparsity-Based Extrapolation
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Infrared, Millimeter, and Terahertz Waves"
DOI: 10.1007/s10762-021-00796-5
Abstract: We introduce a generalized extrapolation framework as a constrained optimization problem to enhance the resolution in terahertz digital in-line holography. The alternating minimization method is employed to iteratively extrapolate the hologram beyond the actually detecting… read more here.
Keywords: resolution; sparsity based; extrapolation; line holography ... See more keywords
Characterization of drop aerodynamic fragmentation in the bag and sheet-thinning regimes by crossed-beam, two-view, digital in-line holography
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Multiphase Flow"
DOI: 10.1016/j.ijmultiphaseflow.2017.04.011
Abstract: Abstract When a spherical liquid drop is subjected to a step change in relative gas velocity, aerodynamic forces lead to drop deformation and possible breakup into a number of secondary fragments. To investigate this flow,… read more here.
Keywords: sheet thinning; drop; digital line; breakup ... See more keywords
Variable zoom digital in-line holographic microscopy
Sign Up to like & getrecommendations! Published in 2020 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2019.105939
Abstract: Abstract We report on a novel layout providing variable zoom in digital in-line holographic microscopy (VZ-DIHM). The implementation is in virtue of an electrically tunable lens (ETL) which enables to slightly shift the illumination source… read more here.
Keywords: variable zoom; microscopy; zoom digital; holographic microscopy ... See more keywords
Deep DIH: Single-Shot Digital In-Line Holography Reconstruction by Deep Learning
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.3036380
Abstract: Digital in-line holography (DIH) is broadly used to reconstruct 3D shapes of microscopic objects from their 2D holograms. One of the technical challenges in the reconstruction stage is eliminating the twin image originating from the… read more here.
Keywords: reconstruction; digital line; single shot; holography ... See more keywords
Resolution and sampling analysis in digital in-line holography with spherical wave illumination
Sign Up to like & getrecommendations! Published in 2019 at "Optical Engineering"
DOI: 10.1117/1.oe.59.10.102402
Abstract: Abstract. The resolution optimization and sampling strategies in practical digital in-line holography (DIH) with spherical wave illumination are analytically studied by optimizing system parameters. Optimal parameters of holographic recording, including illumination wavelength, numerical aperture of… read more here.
Keywords: resolution; digital line; wave; illumination ... See more keywords
3D image distortion problem in digital in-line holographic microscopy and its effective solution.
Sign Up to like & getrecommendations! Published in 2017 at "Optics express"
DOI: 10.1364/oe.25.021969
Abstract: Digital in-line holographic microscopy (DIHM) has attracted attention because of its simple but powerful three-dimensional (3D) imaging capability. To improve the spatial resolution, 3D image reconstruction algorithms use numerical magnification, which generates distortions in the… read more here.
Keywords: image; microscopy; holographic microscopy; digital line ... See more keywords
Bubbles, drops, and solid particles recognition from real or virtual photonic jets reconstructed by digital in-line holography.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.002945
Abstract: The image of the photonic jet (also called caustic) formed by a large, transparent, and spherical particle, reconstructed by digital in-line holography, is shown to be similar to the Airy pattern observed at the focus… read more here.
Keywords: line holography; real virtual; digital line; solid particles ... See more keywords
Two-Step Converging Spherical Wave Diffracted at a Circular Aperture of Digital In-Line Holography
Sign Up to like & getrecommendations! Published in 2022 at "Micromachines"
DOI: 10.3390/mi13081284
Abstract: The aspheric light emitted from a pinhole restrains the reconstruction quality of a digital in-line hologram. Herein, the Fresnel-diffracted spot from the first step converging spherical wave diffracted at a rough circular aperture is collimated… read more here.
Keywords: converging spherical; wave diffracted; spherical wave; digital line ... See more keywords