Image intensifier tube comprising a chromium-oxide coating
AssigneeU.S. Philips Corporation
InventorPetrus G. H. J. Smits
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Abstract
In an image intensifier tube comprising a photosensitive layer an insulating wall portion is coated with a layer of chromium oxide which is deposited in the form of a chromium nitrate layer which is subsequently baked at a temperature of approximately 525.degree. C. A thin, suitably adhesive, uniform and transparent coating layer having a comparatively high resistance value is thus achieved.
Claims4
An image intensifier tube, comprising a housing which is formed by an entrance window, an exit window and an envelope portion which consists partly of a translucent, electrically insulating material, which housing accommodates an electron-optical system for imaging photoelectrons from a photocathode onto an exit screen, characterized in that at least a part of the translucent envelope portion is coated with transparent chromium oxide.
Dependencies are inferred from the claim text.