Lee Grodzins,Jeffrey R. Schubert,Omar Al-Kofahi,Peter J. Rothschild
申请号：
US13446548
公开号：
US09052271B2
申请日:
2012.04.13
申请国别(地区):
US
年份:
2015
代理人:
摘要：
Apparatus for interrupting and/or scanning a beam of penetrating radiation, such as for purposes of inspecting contents of a container. A source, such as an x-ray tube, generates a fan beam of radiation effectively emanating from a source axis, with the width of the fan beam collimated by a width collimator, such as a clamshell collimator. An angular collimator, stationary during the course of scanning, limits the extent of the scan, and a multi-aperture unit, such as a hoop, or a nested pair of hoops, is rotated about a central axis, and structured in such a manner that the total beam fluence incident on a target is conserved for different fields of view of the beam on the target. The central axis of hoop rotation need not coincide with the source axis.
