The Image Iconoscope
- 1 September 1939
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 27 (9) , 541-547
- https://doi.org/10.1109/jrproc.1939.228709
Abstract
An iconoscope having increased sensitivity is to be desired for purposes of improving studio conditions, making possible more universal outdoor work, and permitting greater depths of focus. The new tube described obtains its high sensitivity by making use of an electron image of the scene to be transmitted, projected onto a scanned mosaic. The method permits more efficient and better photocathodes, and also secondary-emission image intensification at the mosaic, resulting in a sensitivity 6 to 10 times greater than that of the standard iconoscope operated under the same conditions. The translucent photocathode is made by evaporating silver on a transparent surface, oxidizing, treating with caesium, and evaporating more silver. The electron image may be focused by either electrostatic or magnetic fields. Several types of mosaics are suitable for receiving and storing the electron picture.Keywords
This publication has 6 references indexed in Scilit:
- Recent Improvements in the Design and Characteristics of the IconoscopeProceedings of the IRE, 1939
- Theory and Performance of the IconoscopeProceedings of the Institute of Radio Engineers, 1937
- Television Pickup Tubes with Cathode-Ray Beam ScanningProceedings of the IRE, 1937
- Iconoscopesand Kinescopesin TelevisionJournal of the Society of Motion Picture Engineers, 1937
- Electron Optics of an Image TubeJournal of Applied Physics, 1936
- Applied Electron OpticsJournal of the Optical Society of America, 1936