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

FIELD: physics.

SUBSTANCE: invention can be used for aligning an X-ray emitter with respect to an object. The laser positioner for an X-ray emitter has a housing, in which there is a central laser, two mirrors, the first of which is mounted at the intersection of optical axes of the laser and X-ray beams perpendicular to the plane they form and directing a laser beam on to an object, concentric with the X-ray beam, a telescope for expanding and collimating laser radiation, which, through the first mirror, lens and second semi-transparent mirror, allows for forming a virtual image of a luminescent disc on the surface of the object in the zone of illumination with the laser beam, a television system, ring-shaped laser matrix, situated at the back focal plane of the lens of the telescope coaxially with its optical axis. Axes of the lasers in the matrix are parallel each other and the optical axis of the lens of the telescope. The positioner also has an ultrasonic range-finder, which measures distance H from the focus of the X-ray tube to the surface of the layer of liquid above the object. The telescope, television system, ring-shaped laser matrix, central laser, semi-transparent mirror and a linear scale, digitised on the distance from the object to the X-ray emitter, are placed in the housing of the positioner in a separate module, which can be moved linearly relative the housing, along the axis of the central laser with possibility of recording value of displacement using a linear scale, placed on the housing of the module and an index on the housing of the positioner.

EFFECT: prevention of distortion of the size of the annular zone of laser spots, showing the region of the object exposed to X-rays if there is a layer of water or some other liquid above the object.

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