单词 | image orthicon |
释义 | image orthiconTelevision (now historical ) noun A kind of television camera tube in which a flow of electrons, produced as in an image tube, strikes a thin glass sheet and forms a pattern of positive charges corresponding to the original image, the video signal being derived by an electron beam which scans the other side of the sheet. Origin1940s; earliest use found in Daily Mail (Hagerstown, Maryland). |
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