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“image tube”
electron image tube, image tube, image converter
1. A tool which projects an optical image generated by electromagnetic radiation from a photosensitive surface onto a fluorescent screen.
2. An electron tube which reproduces on its fluorescent screen an image of the optical image or other irradiation pattern arriving at or striking its photosensitive surface.
3. A cathode-ray tube that has a photoemissive mosaic upon which an optical image is projected, and an electron gun to scan the mosaic and to convert the optical image into a corresponding electrical current.
2. An electron tube which reproduces on its fluorescent screen an image of the optical image or other irradiation pattern arriving at or striking its photosensitive surface.
3. A cathode-ray tube that has a photoemissive mosaic upon which an optical image is projected, and an electron gun to scan the mosaic and to convert the optical image into a corresponding electrical current.
This entry is located in the following unit:
electro-, electr-, electri-
(page 49)
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“image tube”
A photoelectronic instrument for enhancing or sharpening faint astronomical images: An image tube is a form of electron tube in which an image is focused onto an input photocathode.
The resulting emitted electrons are accelerated within the evacuated tube by a very high voltage.
Image intensifiers are used in many instruments; such as, cameras, spectrographs, and acquisition and guidance systems.
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 13)