Abstract
The performance characteristics of a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1{1\over2}$</tex> -in. high-resolution vidicon are described and an insight is given into its design. Techniques of obtaining and measuring the high resolution are related. N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">e</inf> values of equivalent resolution are developed. The electron optical design of the tube yoke and focus coil combination are shown to produce zero beam landing error, excellent geometry and uniform focus. Other factors that have guided the choice of the design features are the availability of 35mm lenses, adequate signal output level for wideband amplifiers and a compromise between sensitivity and lag.
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