Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1991-06-06
1992-09-01
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313532, H01J 3150
Patent
active
051441233
ABSTRACT:
An image dissecting intensifier tube for use in an x-ray examination system is taught. X-ray photons pass through a subject are received by the image dissecting intensifier tube, which converts the photons to electrons. By use of electrostatic plates, the electrons are accelerated, deflected horizontally and vertically, and focused as they pass through the tube. The electrons emit from the tube by feeding the electron image line-by-line through a small aperture formed in the anode of the tube. The video signal that pass through the aperture are received by a multiplier tube built onto the image dissecting intensifier tube which amplifies the signal. The signal passes to a video control unit, which takes the amplified signal and mixes the signal with horizontal and vertical sweep signals, producing a composite video signal. The composite video signal is then displayed on a monitor for viewing. The image obtained is brighter and clearer than that achieved by traditional x-ray systems.
REFERENCES:
patent: 3719823 (1973-03-01), Sheldon
patent: 4243878 (1981-01-01), Kalibjian
Davenport T.
Nelms David C.
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