Brightness intensifier tube with alignment marker
AssigneeU.S. Philips Corporation
InventorWilly J. P. Bols
Life of this patent
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Abstract
In a brightness intensifier tube there is provided, preferably in the exit screen or, in the case of a brightness intensifier comprising a channel plate intensifier, on an input electrode thereof, a fixed alignment marker, for example by local burning in of screen material by photoelectrons from the entrance screen which are liberated therefrom by irradiation by a laser beam. For tubes comprising a fixed entrance optical system the alignment marker is preferably provided by focused application of light via the optical system.
Claims4
A brightness intensifier tube comprising an entrance screen, an exit screen and an electron-optical system for imaging electrons emanating from the entrance screen onto the exit screen wherein the brightness intensifier tube is provided with a channel plate having an input electrode and a fixed alignment marker is provided on the input electrode of the channel plate.
Dependencies are inferred from the claim text.