Results 311 to 320 of about 277,529 (354)

Computation of scanning tunneling microscope images

International Journal of Quantum Chemistry, 1991
This article describes the computation of the tunnel current in a scanning tunneling microscope (STM). The calculation accounts for the three-dimensional scattering taking place simultaneously in the first atomic layers of the sample and in the apex of the probing tip.
Derycke, Isabelle, Vigneron, Jean-Pol, Lambin, Philippe, Laloyaux, Thierry, Lucas, Amand   +4 more
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Imaging with the tunneling and force microscopes

IEEE Proceedings on Micro Electro Mechanical Systems, An Investigation of Micro Structures, Sensors, Actuators, Machines and Robots., 1990
THE SCANNING TUNNELING MICROSCOPEThe STM is an instrument that is used for measuring surface structure. The new instrument was introduced when Rohrer, together with Binnig, discovered that a single atom at the end of a sharp tungsten needle could probe the electronic structure of smooth conducting surfaces.
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Bayesian Tracking for Fluorescence Microscopic Imaging

3rd IEEE International Symposium on Biomedical Imaging: Macro to Nano, 2006., 2006
Fluorescence microscopy is a powerful imaging tool for studying molecular dynamics in living cells. For quantitative motion analysis of subcellular structures robust and accurate detection and tracking techniques are necessary sequential Monte Carlo methods, also known as particle filters (PF), have become a tremendously popular tool to perform ...
Smal, Ihor, Niessen, Wiro, Meijering, Erik   +2 more
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An image intensifier for the electron microscope

Journal of Physics E: Scientific Instruments, 1968
An image intensifier system using a four-stage image intensifier optically coupled to a phosphor screen in the electron microscope is described. The system is shown to be limited by the quantum noise inherent in the electron image. The system can detect images down to 10 fA cm−2 which is at least an order of magnitude better than can be achieved by a ...
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Contrast in the Electron Microscope Image

Nature, 1958
THE detail seen in a highly magnified electron micrograph is to-day limited more by a lack of contrast in the image than by any lack of resolution in the microscope, which is now usually capable of resolving objects at least as small as 15 A., that is, only a few atoms in diameter.
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Surface imaging microscope

SPIE Proceedings, 2008
The three-dimensional shapes of microscopic objects are becoming increasingly important for battlespace CBRNE sensing. Potential applications of microscopic 3D shape observations include characterization of biological weapon particles and manufacturing of micromechanical components.
Eric W. Rogala, Isaac N. Bankman
openaire   +1 more source

Commercial image analysers and the characterization of microscopical images

Journal of Microscopy, 1983
SUMMARYThis review surveys some of the current approaches to the characterization of microscopical images using commercially available image analysers. The role of image pre‐processing and segmentation is considered, together with the characterization of images by optical density, as well as size and shape.The newer analysers are capable of ...
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Electron Microscopic Imaging of Integrin

2011
Rotary-shadowed samples often used for electron microscopy do not preserve native integrin conformations. Negatively stained integrins - or, more desirably, unstained integrins in a cryo-condition - are now being used with sophisticated imaging techniques.
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An Imaging Microscope at 121.6nm

Optical Design and Fabrication 2017 (Freeform, IODC, OFT), 2017
Optical design and system engineering of an imaging microscope with a Lyman-α source at 121.6nm is presented. Preliminary imaging experiments and results are shown, and future implementation of the system is discussed.
Weichuan Gao, Emily Finan, Byeongjoon Jeong, Geon-Hee Kim, Youngsik Kim, Tom Milster   +5 more
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The Optics of Microscope Image Formation

2003
Although geometric optics gives a good understanding of how the microscope works, it fails in one critical area, which is explaining the origin of microscope resolution. To accomplish this, one must consider the microscope from the viewpoint of physical optics.
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