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Pick up screens for x-ray image intensifier tubes employing evaporated activated scintillator layer

Patent ·
OSTI ID:7273122
The present invention relates in general to methods for making pick-up screens for x-ray image intensifier tubes and, more particularly, to an improved method wherein the x-ray fluorescent phosphor screen element is formed by evaporation of an alkali metal halide material in vacuum and condensing the evaporated material on an x-ray transparent portion of the x-ray intensifier tube, whereby a curved x-ray image pick-up screen is formed which has improved quantum efficiency and resolution. Such improved x-ray image intensifier tubes are especially useful for, but not limited in use to x-ray systems and for intensifying gamma ray images obtained in applications of nuclear medicine. 7 claims, 5 drawing figures.
Assignee:
Varian Associates
Patent Number(s):
US 3961182
OSTI ID:
7273122
Country of Publication:
United States
Language:
English

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Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CAMERAS
EFFICIENCY
ELECTRON TUBES
GAMMA CAMERAS
IMAGE INTENSIFIERS
IMAGES
PHOSPHORS
RESOLUTION
SPATIAL RESOLUTION
X-RAY EQUIPMENT
X-RAY TUBES