Results 21 to 30 of about 16,139 (251)
Adaptation of the Standard Off-Axis Digital Holographic Microscope to Achieve Variable Magnification
Photonics, 2021 Traditional microscopy provides only for a small set of magnifications using a finite set of microscope objectives. Here, a novel architecture is proposed for quantitative phase microscopy that requires only a simple adaptation of the traditional off ...
Xin Fan +4 more
doaj +1 more source
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 ...
Zahid Yaqoob +7 more
openaire +6 more sources
Characterization of microlenses by digital holographic microscopy [PDF]
Applied Optics, 2006 We demonstrate the use of digital holographic microscopy (DHM) as a metrological tool in micro-optics testing. Measurement principles are compared with those performed with Twyman-Green, Mach-Zehnder, and white-light interferometers. Measurements performed on refractive microlenses with reflection DHM are compared with measurements performed with ...
Tristan Colomb +8 more
openaire +3 more sources
Digital Holographic Microscopy of Phase Separation in Multicomponent Lipid Membranes [PDF]
, 2016 Lateral in-homogeneities in lipid compositions cause microdomains formation and change in the physical properties of biological membranes. With the presence of cholesterol and mixed species of lipids, phospholipid membranes segregate into lateral domains
Darudi, Ahmad +3 more
core +4 more sources
4D digital holographic microscopy [PDF]
2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017 4D Digital Holographic Microscopy (4D-DHM) is a new technique capable of performing 3D imaging of moving objects. 3D reconstruction is made from a single hologram, but is restricted to sparse objects that occupy only small part of the volume. For a sequence of holograms, 4D-DHM therefore performs 4D (x; y; z and t) imaging.
Alexey Brodoline +2 more
openaire +2 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
doaj +1 more source
Lensfree super-resolution holographic microscopy using wetting films on a chip. [PDF]
, 2011 We investigate the use of wetting films to significantly improve the imaging performance of lensfree pixel super-resolution on-chip microscopy, achieving < 1 µm spatial resolution over a large imaging area of ~24 mm(2).
Bishara, Waheb +2 more
core +1 more source
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.
Ichirou Yamaguchi +2 more
openaire +2 more sources
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
Diabetes screening by telecentric digital holographic microscopy [PDF]
Journal of Microscopy, 2015 SummaryDiabetes is currently the world's fastest growing chronic disease and it is caused by deficient production of insulin by the endocrine pancreas or by abnormal insulin action in peripheral tissues. This results in persistent hyperglycaemia that over time may produce chronic diabetic complications.
Doblas Expósito, Ana Isabel +5 more
openaire +6 more sources