| 单词 | television pickup tube |
| 释义 | television pickup tube (extremely rare) n WORD FAMILY television pickup tube n a tube that rapidly scans an optical image and converts it into electronic signals Syn|Hypo|Hyper television-camera tube iconoscope the first practical television-camera for picture pickup; invented in 1923 by Vladimir Kosma Zworykin image orthicon, orthicona 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 electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, tube, vacuum tube electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope |
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