Results 21 to 30 of about 16,591 (234)
Digital Holographic Microscopy [PDF]
Optik & Photonik, 2007 AbstractDigital holographic microscopy provides quantitative phase contrast imaging that is suitable for high resolving investigations on reflective surfaces as well as for marker‐free analysis of living cells. Results from engineered surfaces and living cells demonstrate applications of digital holographic microscopy for technical inspection and life ...
Björn Kemper +2 more
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Digital Holographic Microscopy
Microscopy and Microanalysis, 1999 Abstract We applied phase-shifting digital holography to microscopy in this paper. At first lensless microscopy is proposed, in which no optical adjustment is necessary. Then, the method is applied to relax the limitation of focal depth in traditional optical microscopy.
Tong Zhang +2 more
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Speckle-field digital holographic microscopy [PDF]
SPIE Proceedings, 2009 The use of coherent light in conventional holographic phase microscopy (HPM) poses three major drawbacks: poor spatial resolution, weak depth sectioning, and fixed pattern noise due to unwanted diffraction. Here, we report a technique which can overcome these drawbacks, but maintains the advantage of phase microscopy - high contrast live cell imaging ...
Park, Y Park, YongKeun +5 more
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Monitoring Human Neutrophil Differentiation by Digital Holographic Microscopy
Frontiers in Physics, 2021 We report on the usefulness of digital holographic microscopy (DHM) for the assessment of human neutrophil differentiation from myeloid cells. The cell and nuclear regions have been designated by image segmentation of the optical phase function, and the ...
Maria Augusta do R. B. F. Lima +2 more
doaj +1 more source
Lensfree on-chip microscopy over a wide field-of-view using pixel super-resolution. [PDF]
, 2010 We demonstrate lensfree holographic microscopy on a chip to achieve approximately 0.6 microm spatial resolution corresponding to a numerical aperture of approximately 0.5 over a large field-of-view of approximately 24 mm2.
Bishara, Waheb +3 more
core +1 more source
Laser Doppler holographic microscopy in transmission: application to fish embryo imaging [PDF]
, 2014 We have extended Laser Doppler holographic microscopy to transmission geometry. The technique is validated with living fish embryos imaged by a modified upright bio-microcope.
Alexandre, Daniel +2 more
core +3 more sources
Dynamic Speckle Illumination Digital Holographic Microscopy by Doubly Scattered System
Photonics, 2021 The coherent noise always exists in digital holographic microscopy due to the laser source, degrading the image quality. A method of speckle suppression using the dynamic speckle illumination, produced by double-moving diffusers, is presented in digital ...
Yun Liu +7 more
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Image Contrast Improvement in Interference-Dark-Field Digital Holographic Microscopy
Photonics, 2021 Conventional dark-field digital holographic microscopy (DHM) techniques require the use of specialized optics, and, thus, obtaining dark-field images with high contrast has a high cost. Herein, we propose a DHM system that uses an interference-dark-field
Chi-Ching Chang +4 more
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On-chip differential interference contrast microscopy using lensless digital holography. [PDF]
, 2010 We introduce the use of a birefringent crystal with lensless digital holography to create an on-chip differential interference contrast (DIC) microscope.
Isikman, Serhan O +3 more
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Blind digital holographic microscopy [PDF]
SPIE Proceedings, 2017 A blind variant of digital holographic microscopy is presented that removes the requirement for a well-characterized, highly divergent reference beam. This is achieved by adopting an off-axis recording geometry where a sequence of holograms is recorded as the reference is tilted, and an iterative algorithm that estimates the amplitudes and phases of ...
Anderson, Patrick N. +9 more
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