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Photomultiplier tubes (photomultipliers or PMTs for short) are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. They are members of the class of vacuum tubes , more specifically vacuum phototubes .
German version Image:Diagram of a two-photon excitation microscope de.svg. ... Fix acronym for Photomultiplier tube (PMT) 19:40, 18 November 2006: 989 × 805 (14 KB ...
English: Schematic view of a photomultiplier coupled to a scintillator, illustrating detection of gamma rays Français : Schéma dépeignant une photo de haute énergie frappant un cristal scintillant, ce qui produit des photons de faible énergie qui sont ensuite convertis en photo-électrons puis multiplié dans un photomultiplicateur .
Photomultiplier tube, a vacuum tube converting incident photons into an electric signal. Photomultiplier tubes (PMTs for short) are members of the class of vacuum tubes, and more specifically vacuum phototubes, which are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum.
Apparatus with a scintillating crystal, photomultiplier, and data acquisition components. animation of radiation scintillation counter using a photomultiplier tube. When an ionizing particle passes into the scintillator material, atoms are excited along a track. For charged particles the track is the path of the particle itself.
Such a tube is more correctly called a 'photoemissive cell' to distinguish it from photovoltaic or photoconductive cells. Phototubes were previously more widely used but are now replaced in many applications by solid state photodetectors. The photomultiplier tube is one of the most sensitive light detectors, and is still widely used in physics ...
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Its light passes through the image being scanned and is converted to a proportional electrical signal by photomultiplier tube(s), one for each color (red, green, blue), that detects the variations in intensity of the beam spot as it scans across the film, and are converted to proportional electrical signals, one for each of the color channels.