A Method of Reducing Deflection Defocusing in Cathode‐Ray Tubes
作者:
R. G. E. Hutter,
S. W. Harrison,
期刊:
Journal of Applied Physics
(AIP Available online 1950)
卷期:
Volume 21,
issue 2
页码: 84-89
ISSN:0021-8979
年代: 1950
DOI:10.1063/1.1699628
出版商: AIP
数据来源: AIP
摘要:
A discussion of deflection defocusing is given to point out the two‐dimensional character of the focusing action of deflection fields. A photograph of spot distortion actually observed is shown. A brief theory of combined spherical and cylindrical lenses is given, and a method of spot correction based on the principle of ``beam predistortion'' is described. An electron gun used for such correction is shown and experimental results obtained with this gun are exhibited.
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