caméra image orthicon

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• image orthicon — ☆ image orthicon n. Electronics a television camera tube of high sensitivity that combines an image converter, an orthicon, and an electron multiplier amplifier …   English World dictionary

• image orthicon — noun a now obsolete picture pickup tube in a television camera; electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons (Freq. 1) •… …   Useful english dictionary

• image orthicon — Television. a camera tube, more sensitive than the orthicon, in which an electron image generated by a photocathode is focused on one side of a target that is scanned on its other side by a beam of low velocity electrons to produce the output… …   Universalium

• IMAGE — Même limitée aux arts visuels, l’image ne peut être séparée des racines profondes qu’elle a dans la mémoire, l’imagination, la pensée ou le rêve. L’image est sans nul doute l’objet de réflexion le plus rebelle aux classifications par genres et… …   Encyclopédie Universelle

• orthicon — noun a now obsolete picture pickup tube in a television camera; electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons (Freq. 1) •… …   Useful english dictionary

• camera — I (New American Roget s College Thesaurus) n. See optical instruments. II (Roget s IV) n. Kinds of cameras include: camera obscura, astrograph, camera lucida, camcorder, cinecamera, X ray machine, image orthicon, photochronograph, photogrammeter …   English dictionary for students

• 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

• Professional video camera — A professional video camera (often called a television camera even though the use has spread) is a high end device for recording electronic moving images (as opposed to a movie camera, that records the images on film). Originally developed for… …   Wikipedia

• television-camera tube — noun a tube that rapidly scans an optical image and converts it into electronic signals • Syn: ↑television pickup tube • Hypernyms: ↑tube, ↑vacuum tube, ↑thermionic vacuum tube, ↑thermionic tube, ↑electron tube, ↑ …   Useful english dictionary

• NODD (Nexus Orthicon Display Device) — The first incarnation of the BBC1 globe. In use between 1969 and 1974 …   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