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Image tubeAn optical image is projected onto a planar surface of a photocathode that derives an electron beam replica of the image. A target electrode displaced relative to the photocathode so that it does not obstruct the optical image includes a planar surface for receiving and deriving an accurate replica of the electron beam image. The two planar surfaces are parallel. The electron beam image is focused on the target electrode by providing throughout a region that extends between the planar surfaces of the photocathode and receiving electrode, constant homogeneous dc electric and magnetic fields. The electric field extends in a direction perpendicular to the planar surfaces while the magnetic field extends along a straight line that intersects the photocathode and target electrode at an acute angle.
Document ID
19740013737
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Hallam, K. L. (Bendix Res. Labs.)
Johnson, C. B. (Bendix Res. Labs.)
Date Acquired
September 3, 2013
Publication Date
April 23, 1974
Subject Category
Thermodynamics And Combustion
Accession Number
74N21850
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-3,806,756|NASA-CASE-GSC-11602-1
Patent Application
US-PATENT-APPL-SN-298157

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