| 摘要 |
FIELD: physics. ^ SUBSTANCE: invention can be used for aligning an X-ray emitter with respect to an object. The positioner additionally contains a fourth reflector, mounted on an axis which passes through the point of intersection of the first reflector and the axis of the laser, perpendicular the plane formed by axes of the X-ray and laser beams at a distance C from that point and aligned such that, the normal, passing from its point of intersection with this axis, lies in a plane passing through the axis of the X-ray beam, perpendicular the plane formed by axes of laser and X-ray beams and inclined at an angle of 45 to it. The first reflector is mounted at an angle of 45 to the axis of the laser, and its reflecting surface is perpendicular to the plane, passing through the axis of the laser, perpendicular to the plane formed by axes of the laser and X-ray beams. The distance C from the axis of the laser to the centre of the fourth reflector is chosen based on the expression where D - is the distance to the object, F - is the cross dimension of the shielding element of the structural member of the object, t - is the distance from the said shielding element to the object. A third cylindrical lens, similar to the first two, and a third shutter are mounted between the first and fourth reflectors on an axis, passing through the centre of the first and fourth reflectors, with possibility of rotation about this axis. ^ EFFECT: possibility of aligning a laser view-finder directly onto a monitored region. ^ 4 dwg |
