Results 41 to 50 of about 1,160,757 (195)
Field-portable reflection and transmission microscopy based on lensless holography [PDF]
Biomedical Optics Express, 2011 We demonstrate a lensfree dual-mode holographic microscope that can image specimens in both transmission and reflection geometries using in-line transmission and off-axis reflection holography, respectively. This field-portable dual-mode holographic microscope has a weight of ~200 g with dimensions of 15 x 5.5 x 5cm, where a laser source is powered by ...
Lee, Myungjun +2 more
openaire +3 more sources
Applied Surface Science Advances, 2023 Thickness and surface profiling of transparent/semi-transparent specimens are vital in various applications, including electronics, optics, healthcare, and biotechnology. Surface profiling techniques characterize and analyze surface thickness, morphology,
Subhash Utadiya +9 more
doaj +1 more source
Lensless holographic trichoscopy and trichometry [for medical specialists]
, 2022 A new principle of differential trichomorphological analysis and on-chip diagnostics is proposed. This principle can be considered as a transition from a trichoscope to a metrologically effective trichometer based on holographic laser, in particular ...
Oleg Gradov
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Low-intensity illumination for lensless digital holographic microscopy with minimized sample interaction [PDF]
, 2023 Exposure to laser light alters cell culture examination via optical microscopic imaging techniques, also based on label-free coherent digital holography. To mitigate this detrimental feature, researchers tend to use a broader spectrum and lower intensity
Rogujski, Piotr +6 more
core +2 more sources
Invited Article: Mask-modulated lensless imaging with multi-angle illuminations
APL Photonics, 2018 The use of multiple diverse measurements can make lensless phase retrieval more robust. Conventional diversity functions include aperture diversity, wavelength diversity, translational diversity, and defocus diversity.
Zibang Zhang +8 more
doaj +1 more source
Simple concept for a wide-field lensless digital holographic microscope using a laser diode
Current Directions in Biomedical Engineering, 2015 Wide-field, lensless digital holographic microscopy is a new microscopic imaging technique for telemedicine and for resource limited setting [1]. In this contribution we propose a very simple wide-field lensless digital holographic microscope using a ...
Adinda-Ougba A. +3 more
doaj +1 more source
Lensless fluorescent on-chip microscopy using a fiber-optic taper [PDF]
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011 We demonstrate a lensfree on-chip fluorescent microscopy platform that can image fluorescently labeled cells over ~60 mm(2) field-of-view with 5-fold higher density of fiber-optic waveguides in its top facet compared to the bottom facet. For excitation, an incoherent light source (e.g., a simple light emitting diode--LED) is used to pump fluorescent ...
Ahmet F. Coskun +3 more
openaire +3 more sources
A Reversible Clearing Strategy Enables Robust Label‐Free Phase Imaging of Thick Tissues
Laser &Photonics Reviews, Volume 20, Issue 21, 6 November 2026.The principle of a reversible clearing strategy via glycerol and tartrazine solution (GTS) for robust whole‐slide label‐free phase imaging of thick tissue slices via high‐throughput Fourier ptychographic microscopy (FPM) and lensless digital holographic microscopy (LDHM). ABSTRACT Thick biological specimens impose strong scattering and attenuation that
Mikołaj Krysa +5 more
wiley +1 more source
Speckle-scanning ptychographic lensless imaging
, 2019 Operation of the speckle-scanning ptychographic lensless imaging platform -- Smart Imaging Lab @ UConnHe Zhang, Zichao Bian, Shaowei Jiang, Jian Liu, Pengming Song, and Guoan Zheng, "Field-portable quantitative lensless microscopy based on translated ...
Guoan Zheng (4764957)
core +1 more source
, 2016 Lensless imaging refers to an imaging technique which requires no imaging element between the light transmitted by the sample and the camera. This configuration enables designing compact devices.
Moser, Christophe +3 more
core +1 more source