Results 211 to 220 of about 16,591 (234)
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Speckle-field digital polarization holographic microscopy
Optics Letters, 2019We present a new polarization holographic microscopy technique based on speckle-field illumination with enhanced spatial resolution and controlled coherent noise reduction. The proposed technique employs a spatial light modulator for the generation of a sequential speckle pattern for the illumination of the sample.
R. V. Vinu +4 more
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Immersion digital in-line holographic microscopy
Optics Letters, 2006Digital in-line holographic microscopy is a promising new tool for high resolution imaging. We demonstrate, by using latex beads, that a considerable increase in numerical aperture, and, therefore, resolution can be achieved if the space between a source and a CCD camera chip is filled with a high refractive index medium.
J, Garcia-Sucerquia +3 more
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Optical Tomography by Digital Holographic Microscopy
Novel Optical Instrumentation for Biomedical Applications IV, 2009Optical tomography provides three-dimensional data of the measured specimen, while quantitative phase imaging enables measuring the induced phase-shifts. Combining those two technologies makes possible to get three-dimensional refractive index reconstruction.
Nicolas Pavillon +3 more
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Coded aperture temporal compressive digital holographic microscopy
Optics Letters, 2023We report a coded aperture temporal compressive digital holographic microscopy (CATCHY) system to capture high-speed high-resolution samples by integrating snapshot compressive imaging (SCI) into digital holographic microscopy. Specifically, a two-dimensional (2D) detector samples a 4D (x, y, z, t) spatiotemporal data in a compressive manner, and after
Yufei Dou +4 more
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In-line digital holographic imaging in volume holographic microscopy
Optics Letters, 2015A dual-plane in-line digital holographic imaging method incorporating volume holographic microscopy (VHM) is presented to reconstruct objects in a single shot while eliminating zero-order and twin-image diffracted waves. The proposed imaging method is configured such that information from different axial planes is acquired simultaneously using ...
Xiaomin, Zhai +7 more
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Self-referenced digital holographic microscopy
2012 13th International Workshop on Cellular Nanoscale Networks and their Applications, 2012By developing a self referenced digital holographic microscope it becomes possible to record holograms and numerically reconstruct volumetric images of low coherence fluorescent objects such as (auto)fluorescent biological samples (e.g. algae). Our goal was to develop and construct a simple, compact portable device.
Martori Zsolt Kiss +2 more
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Digital Holographic Microscopy to Assess Cell Behavior
2023Digital holographic microscopy is an imaging technique particularly well suited to the study of living cells in culture, as no labeling is required and computed phase maps produce high contrast, quantitative pixel information. A full experiment involves instrument calibration, cell culture quality checks, selection and setup of imaging chambers, a ...
Brad, Bazow +5 more
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Multi-dimensional digital holographic microscopy
Optical Design and Testing VIII, 2018In this paper, we present a multi-dimensional digital holographic microscopy for biological applications. First, we present our concept of an optical microscopy that can produce both phase and fluorescence images. Then, a technique is demonstrated to obtain the three-dimensional distribution of fluorescence beads by a common-path off-axis incoherent ...
Manoj Kumar +3 more
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Superesolution in digital holographic microscopy
2011 10th Euro-American Workshop on Information Optics, 2011In this contribution, we address with the possibility to overcome the limited resolving power of imaging systems beyond the limit imposed by Abbe's diffraction theory. We first review the mathematical foundations underlying superresolution (SR) from an information theory point of view and then we focus on two multiplexing approaches in digital ...
Alejandro Calabuig +4 more
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Autofocusing in digital holographic microscopy
3D Research, 2011Many applications in non-destructive testing at a microscopic level and in live cell imaging require automated focusing due to unstable environmental conditions, moving specimen or the limited depth of field of the applied optical imaging systems.
Patrik Langehanenberg +2 more
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