DICT.TW Dictionary Taiwan

 or·thi·con /ˈɔrθɪˌkɑn/
 正析象管

 orthicon
      n : 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 [syn: image orthicon]