An image tube is a vacuum-filled tube with a photocathode at one end, used to amplify faint images. Electrons, released when light forms an image on the photo cathode, are accelerated by magnetic coils around the tube so that they form a second, brighter image when they strike a second phosphor screen. Also known as an image intensifier tube.
Related categories OPTICS AND OPTICAL PHENOMENA
TELESCOPE EQUIPMENT AND TECHNIQUES
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