photoemissive cathode

См. также в других словарях:

• phototube — noun Date: 1930 an electron tube having a photoemissive cathode whose released electrons are drawn to the anode by reason of its positive potential …   New Collegiate Dictionary

• phototube — [fōt′ō to͞ob΄, fōt′ōtyo͞ob΄] n. [ PHOTO(ELECTRIC) + TUBE] a vacuum tube designed to convert light energy into electrical energy by means of a photoemissive cathode …   English World dictionary

• phototube — ˈfōd.ō+ˌ noun Etymology: phot + tube : an electron tube having a photoemissive cathode whose released electrons are drawn to the anode by reason of its positive potential …   Useful english dictionary

• photomultiplier tube — noun see photomultiplier * * * pho|to|mul|ti|pli|er «FOH toh MUHL tuh PLY uhr», noun. or photomultiplier tube, a vacuum tube having a series of supplementary electrodes between the photocathode and the anode. When light strikes the photoemissive… …   Useful english dictionary

• pho|to|mul|ti|pli|er — «FOH toh MUHL tuh PLY uhr», noun. or photomultiplier tube, a vacuum tube having a series of supplementary electrodes between the photocathode and the anode. When light strikes the photoemissive cathode a cascade of electrons is emitted and… …   Useful english dictionary

• spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium

• Mellon optical memory — was an early form of computer memory invented at the Mellon Institute in the 1950s. The device used a combination of photoemissive and phosphorescent materials to produce a light loop between two surfaces. The presence or lack of light, detected… …   Wikipedia

• TUBES ÉLECTRONIQUES — Les tubes électroniques sont des composants qui entrent dans la constitution de matériels électroniques très divers (émetteurs de radiodiffusion; émetteurs, récepteurs, caméras de télévision; équipements de télécommunications; radars; contre… …   Encyclopédie Universelle

• Caesium — xenon ← caesium → barium Rb ↑ Cs ↓ Fr …   Wikipedia

• LUMIÈRE - Optique — Il est difficile de séparer nettement les notions de lumière et d’optique. La lumière, évidence sensible, apparaît communément comme première par rapport à l’optique, science dont l’objet est l’étude de la lumière et qui englobe toutes les… …   Encyclopédie Universelle

• Photomultiplier — tubes (photomultipliers or PMTs for short), members of the class of vacuum tubes, and more specifically phototubes, are extremely sensitive detectors of light in the ultraviolet, visible, and near infrared ranges of the electromagnetic spectrum.… …   Wikipedia