Scanning x-ray inspection system
US4392237A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1980 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Aug 25, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/083
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.