Patent ID: 6353227
Filing Date: 2002-03-05
Classification: G21K

Abstract:
Apparatus for collimating particle emanations, comprising:(a) a collimator plate made of an attenuating material capable of attenuating particle emanations, the collimator plate having a plurality of apertures of pre-selected cross-sectional shape and three-dimensional distribution for restricting the emanations to pass through in a plurality of defined collimated beams; and (b) motion means operatively coupled to the collimator plate for moving the collimator plate as a whole relative to an emanation detector during a detection time, in a manner which enables the plurality of collimated beams to form a defined combined beam during the detection time yielding a pre-selected detector cross-sectional sampling of the emanations within an image space; (c) wherein the collimator face is described by coordinates x and y, and the apertures are of such cross-sectional shape and distribution that the ratio of distance occupied by the apertures in the x-coordinate direction of motion to the distance traveled by the collimator as a whole in the x-coordinate direction during the detection time is essentially a constant, independent of y, for y orthogonal to x.