Image orthicon definition is – a camera tube that is similar to the iconoscope or the orthicon and uses secondary emission and electron multiplication to produce . Image orthicon definition, a camera tube, more sensitive than the orthicon, in which an electron image generated by a photocathode is focused on one side of a. Define image orthicon. image orthicon synonyms, image orthicon pronunciation, image orthicon translation, English dictionary definition of image orthicon. n.
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The advantage of this arrangement was that for virtually every color, the video level of the green component was always less than orthicob cyan, and similarly the cyan was always less than the white. Disk rotation was synchronized with vertical scanning so that each vertical scan in sequence was for a different primary color.
Definition of image orthicon. Unsourced material may be challenged and removed.
Video camera tube
Each globule is very active photoelectrically and constitutes, to all intents and purposes, a minute individual photoelectric cell”.
Dictionary Entries near image orthicon im- image image dissector image orthicon imager imagery image slicer. All the vidicon type tubes except the vidicon itself were able to use a light biasing technique ikage improve the sensitivity and contrast.
February Learn how and when to remove this template message. Statistics for image orthicon Look-up Popularity. Zworykin, pioneer of television. CBS Labs invented the first outboard edge enhancement circuits to sharpen the edges of Ortnicon generated images.
While broadcast cameras migrated to solid-state charge-coupled devices, Plumbicon tubes remained a staple imaging device in the medical field. One technique has already been described Trinicon above.
The resultant signal was immune to most extraneous signal “crosstalk” orhicon other parts of the target, and could yield extremely detailed images. However, there are serious problems as well, because the electron beam “spreads” and accelerates in a direction parallel to the target when it scans the image’s orthiicon and corners, so that it produces secondary electrons and one gets an image that is well focused in the center but blurry in the borders.
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Retrieved March 14, Wireless World, number Literally How to use a word that orthicom drives some people nuts. And is one way more correct than the others?
Video camera tube – Wikipedia
This tube is essentially identical to the super-Emitron, but the target is constructed of a thin layer of isolating material placed on top of a conductive base, the mosaic of metallic granules is missing. Campbell-Swinton inhe found that a longitudinal magnetic field generated by an axial coil can focus an electron beam. This was the first time that anyone could broadcast a live street scene from cameras installed on the roof of neighbor buildings.
In detail, coils in a deflection yoke extend some distance beyond the neck of the tube, and lie close to the flare of the bulb; they have a truly distinctive appearance. Despite these advantages, acceptance and incorporation ofthicon solid-state sensors into television and otthicon cameras was not immediate. The Institute of Electrical Engineers. Since darker images produce less positive charge on the target, the excess electrons deposited by the splash will be read as a dark region by the scanning electron beam.
A switch-over to solid-state image sensors rendered much of that equipment and the investments behind it obsolete ortuicon required new equipment optimized to work well with solid-state sensors, just as the old equipment was optimized for tube-sourced video. Its surface consists of selenium with trace amounts of arsenic and tellurium added SeAsTe to make the signal more stable. New Imagee Times article. In a letter to Nature published in OctoberCampbell-Swinton also announced the results of some orthicln very successful experiments” he had conducted with G.
Davis, the general manager of Westinghouseand Zworykin was asked “to work on something useful”. The secondary emission at the target produces a pattern of positive charges corresponding point by point with the light distribution of the original scene and the thinness of the target allows this charge pattern to be reproduced immediately on its reverse side, i.
Subscribe to America’s largest dictionary and get thousands more definitions and advanced search—ad free! It was also possible to construct a color camera that used a single image tube. That is, giving the illusion of being more sharply focused than it actually is. Principles of Operation Schematic arrangement of the 4. Learn More about image orthicon.