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The oblique electron lens.An oblique electron lens is described that is especially applicable to image converters and camera tubes employing flat opaque photocathodes. The use of optical lenses, corrector plates, and/or mirrors (often employed in other electron lenses designed for use with opaque photocathodes) are eliminated. The oblique electron lens is well suited to ultraviolet and vacuum ultraviolet image converters, and to image converters employing opaque negative electron affinity photocathodes. It is also possible to use this oblique electron lens for electronography. Measurements on an experimental tube show that a limiting resolution of 50 line pairs/mm is possible, but the intrinsic lens quality is believed to approach that of a conventional electromagnetic lens having uniform and colinear electric and magnetic fields.
Document ID
19730051795
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Johnson, C. B.
(Bendix Research Laboratories Southfield, Mich., United States)
Hallam, K. L.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 7, 2013
Publication Date
July 1, 1973
Publication Information
Publication: IEEE Transactions on Electron Devices
Volume: ED-20
Subject Category
Instrumentation And Photography
Accession Number
73A36597
Distribution Limits
Public
Copyright
Other

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