Scanning x-ray inspection system

Details Scanning x-ray inspection system Scanning x-ray inspection system

1980-08-25

1983-07-05

Willis, Davis L.

X-ray or gamma ray systems or devices

Specific application

Absorption

2503581, 2503591, 250385, 378 57, G01N 2300

Patent

active

043922376

ABSTRACT:
An x-ray fan beam is caused to impinge upon an object, such as airport luggage or jars of food, as the object moves translationally through the fan beam; after passage through the object, the x-rays are made to impinge upon an x-ray transmissive detector housing containing a gaseous detecting medium, a power electrode and a plurality of signal electrodes. The power electrode and the signal electrode are maintained at different voltage levels so that electrons and/or ions generated by the interaction of the gaseous detecting medium and the x-rays, drift toward the electrodes thereby producing an electrical current which can be sensed, analyzed, and used, for example, to generate an image or to indicate the presence of foreign matter.

REFERENCES:
patent: 3808444 (1974-04-01), Schneeberger et al.
patent: 4031396 (1977-06-01), Whetten et al.
patent: 4047041 (1977-09-01), Houston
patent: 4122346 (1978-10-01), Enge
patent: 4135095 (1979-01-01), Watanabe

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