Patent ID: 9020103
Filing Date: 2015-04-28
Classification: G21K

Abstract:
1. A scanning apparatus for generating both a far-field scanned beam and a far-field fan beam for incidence upon an inspection target, the far-field scanned beam characterized by an angular extent, the apparatus comprising: a. a source of radiation for generating an inner fan beam of radiation effectively emanating from a source axis and characterized by a width; b. an angle selector, stationary during the course of scanning, for limiting an angular extent of the inner fan beam; c. a multi-aperture unit rotatable about a central axis and interposed between the source and the inspection target during generation of the far-field scanned beam; and d. an actuator for driving the source and angle selector along a direction substantially parallel to the central axis of the multi-aperture unit in such a manner as to permit the far-field fan beam to be emitted uninterrupted by the multi-aperture unit.