Patent ID: 8184776
Filing Date: 2012-05-22
Classification: G21K

Abstract:
1. A filter, comprising: a plurality of filter plates configured to adjust an X-ray energy spectrum, wherein the plurality of filter plates comprises three filter plates; a plurality of rails for fixedly supporting the filter plates, the filter plates being provided in a laminated structure on guiders of the plurality of rails; a plurality of cams which are respectively provided with a groove curve on a surface thereof, wherein a surface of one of the cams comprises a second groove curve; a driving wheel configured to drive the plurality of cams; and a plurality of link levers comprising three link levers, each link lever being connected to one of the filter plates at a first end and being mounted to an axis at an opposite second end such that the link lever is rotatable about the axis, each link lever comprising a pin which is in cooperation with the groove curve of the corresponding cam so that the link lever proceeds with a reciprocating movement according to rotation of the corresponding cam to move the filter connected to it into or out of an X-ray passing space, wherein the plurality of cams are respectively located at a left side and a right side of the driving wheel to move the filter plates into the X-ray passing space from different directions, wherein the second groove curve of the one of the cams which is in cooperation with the pin on a third link lever.