An Improved Vidicon Focusing-Deflecting Unit
The effect known as beam-landing error or “porthole” in vidicon cameras is eliminated through the use of a suitable coil configuration. The axial positions of the coils are chosen so that the beam electrons approach the target with only an axial component of velocity at all times. Exceptional signal uniformity independent of signal-electrode voltage and focus field strength is then obtained with a vidicon having a uniform photoconductor. A particular coil design and the results obtained with it are discussed.
- Print ISSN
- 0361-4573
- Published
- 1959-04
- Content type
- Original Research
- DOI
- 10.5594/J11057
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