LASER CENTRALISER FOR X-RAY EMITTER Russian patent published in 2009 - IPC H05G1/00 

FIELD: physics.

SUBSTANCE: invention can be used in aligning an X-ray emitter relative an object. In the centraliser there is a fourth reflector, which is semitransparent and fitted on the axis of the laser between its first output end and the first reflector at an angle of 45° to this axis, a fifth reflector, lying on an axis running from the point of intersection of the laser with fourth reflector at a distance H from this point. The plane of the fifth reflector is perpendicular to the plane formed by axes of the laser and X-ray beam and is inclined at an angle (α/4) to the axis of the laser, where α - is the angle of divergence of the X-ray beam. Beams reflected from the fifth reflector intersect the axis of the laser at a point, lying at a distance A from the centre of the first reflector, which is equal to distance from this centre to the focus of the X-ray tube, and the distance c from this point to the centre of the fourth reflector is defined by the expression c≥d/tg(α/2) where d is the diametre of the laser beam. The fourth and fifth reflectors are mounted on a flange, which is in a bushing, attached to the housing of the centraliser. The flange has a central opening with diametre D≥d, its axis coincides with the axis of the laser and is rotated by an electric motor through friction or some other device. The frequency of rotation of the flange with reflectors lies in the range ω≥(2-10) Hz, allowing for obtaining a combined image of the laser ring on the object.

EFFECT: illumination of a zone on an object with X-rays, as well as possibility of aligning an object relative the axis of the X-ray beam.

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