screen contrast of electron-beam tube

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• electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube …   Universalium

• Display contrast — Contrast in visual perception is the difference in appearance of two or more parts of a field seen simultaneously or successively (hence: brightness contrast, lightness contrast, color contrast, simultaneous contrast, successive contrast, etc.).… …   Wikipedia

• Cathode ray tube — Cutaway rendering of a color CRT: 1. Three Electron guns (for red, green, and blue phosphor dots) 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red,… …   Wikipedia

• Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …   Wikipedia

• Scanning electron microscope — These pollen grains taken on an SEM show the characteristic depth of field of SEM micrographs …   Wikipedia

• Environmental scanning electron microscope — Wool fibers imaged in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors …   Wikipedia

• Large-screen television technology — developed rapidly in the late 1990s and 2000s. Various flat screen technologies are being developed, but only the liquid crystal display (LCD), plasma display (PDP) and Digital Light Processing (DLP) were released on the public market. These… …   Wikipedia

• контраст экрана электронно-лучевого прибора — Отношение яркости наиболее светлых возбужденных до заданного уровня участков экрана электронно лучевого прибора к яркости его самых темных не возбужденных участков. [ГОСТ 17791 82] Тематики электровакуумные приборы EN screen contrast of electron… …   Справочник технического переводчика

• Nixie tube — The ten digits of a GN 4 Nixie tube. A nixie tube is an electronic device for displaying numerals or other information. The glass tube contains a wire mesh anode and multiple cathodes. In most tubes, the cathodes are shaped like numerals.… …   Wikipedia

• Optical feedback — Example 1. Optical feedback Example 2. Screenshots of optical feedback Optical feedback is the …   Wikipedia

• microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… …   Universalium