| 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 signal. |
| image orthicon n. See orthicon. |
or·thi·con  (ôr'thĭ-kŏn')  n. A television camera pickup tube, more sensitive than the iconoscope, that uses a low-velocity electron beam to scan a photoactive mosaic. Also called image orthicon. [orth(o)- + icon(oscope).] |