Laser centralizer for x-ray emitter

 

The invention relates to non-destructive testing of materials and products using x-ray radiation. Laser centralizer contains the laser, the optical axis of which is parallel to the longitudinal axis of the x-ray emitter, the first and second reflectors, installed respectively in the first and second output ends of the laser, the two cylindrical lenses are mounted respectively between the output ends of the laser and reflectors. Put a beam splitter mounted on the axis of the laser at an angle of 45° to it at a distance H(D/2) from the x-ray beam, the first additional reflector mounted on an axis perpendicular to the axis of the laser and passing through the center of the beam splitter, at a distance H(D/2) from it, the second additional reflector is mounted at an angle of 45° on an axis parallel to the axis of the x-ray beam and passing at a distance H(D/2) from it, at the point of intersection of this axis with the axis parallel to the axis of the laser and passing through the center of the first additional reflector, a third cylindrical lens disposed between the beam splitter and the first additional reflector on the axis, Sednaya through the axis of the x-ray beam perpendicular to the plane of the laser beam, formed by the first cylindrical lens and the first reflector. Ensures the elimination of the separation in time of the operation of the pointing axis of the x-ray beam at the center of the zone of monitoring and measuring the distance to the object. 2 Il.

The invention relates to non-destructive testing using x-ray radiation and can be used to monitor material and items of radiation technique in various engineering industries.

Known laser centralizer for x-ray emitter containing body located therein a laser with two-sided output radiation, the optical axis of which is parallel to the longitudinal axis of the x-ray emitter, two reflector, the first of which was installed at the intersection of the optical axis of the laser with the axis of the x-ray beam, and the second set on the optical axis of the output laser radiation outside the projection on it of the output window of the x-ray emitter can be rotated around an axis perpendicular to the plane defined by the optical axis of the laser with the axis of the x-ray beam, and means for indicating the focal length in the form of a pointer with a scale, fixed to the body of Santiago output beam rotatably around the optical axis of the laser and generates the object image luminous, the angle between which is changed during the rotation of one of the lenses, and the angular sizes of flat diverging laser beams generated by the cylindrical lenses in accordance with the divergence angle of the x-ray beam. When measuring the distance to the object is performed with a parallel arrangement of strips on the object due to their alignment during the rotation of the second reflector, and control the alignment of the center of the controlled zone with the axis of the x-ray beam when the orthogonal arrangement of the strips forming the luminescent object overlap, the center of which coincides with the axis of the x-ray beam [1].

The disadvantage of this device is the separation in time of the operations of the pointing axis of the x-ray beam at the center of the zone of monitoring and measuring the distance to the object due to the necessity of rotation of one of the cylindrical lenses.

In addition, the finding of the first reflector directly in the x-ray beam in the zone of high concentration near the focus x-ray tube leads to its deformation due to heating of the x-ray beam and the emergence of various defects of the patterns projected onto the x-ray with high magnification and manifested in the form of artifacts that complicate the decoding of the image object.

the course of the beam at distance N(D/2), where D is the diameter of the cross - section x-ray beam plane passing through the axis of the laser and perpendicular to the axis of the x-ray beam, advanced optical scheme introduced a beam splitter located on the axis of the laser at an angle of 45° before its first output end at a distance N(D/2) from the axis of the x-ray beam, the first additional reflector, mounted under the beam splitter on an axis at an angle of 45°, passing through its center perpendicular to the axis of the laser distance N(D/2) from the axis of the laser, and the plane of the beam splitter of the first additional reflector parallel, the second additional reflector, mounted on an axis parallel to the axis of the x-ray beam located in a vertical plane passing through this axis at a distance N(D/2) from it, at the point of intersection of this axis with the vertical plane passing through the axis of the laser, and the normal to the center of the reflector is in the vertical plane passing through the axis of the x-ray beam, and inclined at an angle of 45° to the object side, the third cylindrical lens is installed between the beam splitter and the first topolnica the laser beam after reflection from the second and third additional reflectors extends in a vertical plane, passing through the axis of the x-ray beam and orthogonal to the plane of propagation of the plane of the beam formed by the first cylindrical lens and the first reflector.

The invention is illustrated by the drawing, which shows a diagram of the device (Fig.1A) and the scheme of formation of laser overlap on the object (Fig.1B).

Laser centralizer contains the x-ray radiator 1, to which is attached the housing 2 located therein by laser 3 with double-sided output radiation, the optical axis of which is parallel to the longitudinal axis of the x-ray emitter, the first reflector 4, which is located on the axis of the laser at an angle of 45 thereto at a distance N(D/2) from the axis of the x-ray beam along the rays, the second reflector 5 is mounted on the axis of the laser for his second output end for rotation about a vertical axis passing through its center, a cylindrical lens 9 and 10, mounted on the axis of the laser, respectively, before its input and output ends for rotation around the axis of the laser, a beam splitter 8, mounted on the axis of the laser at an angle of 45° to her before the first output end of the laser distance N(D/2) from the axis rentgenowskiej the center of the beam splitter at a distance N(D/2) from the center of the second additional reflector 6, mounted at an angle of 45° on an axis parallel to the axis of the x-ray beam passing at a distance N(D/2) from her point of intersection with the axis parallel to the axis of the laser and passing through the center of the first additional reflector, the third cylindrical lens 11 is located between the beam splitter 8 and the reflector 7 on the axis connecting their centers, and installed in the position in which form it flat diverging laser beam after reflection from the reflectors 6 and 7 extends in a vertical plane passing through the axis of the x-ray beam and orthogonal to the plane of propagation of the plane of the beam formed by the lens 9 and the reflector 4.

In this case, the object of image formation laser beams and a center of which coincides with the intersection point of the object axis of the x-ray beam (see Fig.1B).

The lens 10 and the reflector 5 is formed on the object image vertical stripes moving parallel to the vertical strip overlap during rotation of the reflector 5. When combining these bands are counting down the distance to the object on the scale 13 of the display unit using Castellabate.

Claims

Laser centralizer for x-ray emitter containing body located therein a laser with two-sided output radiation, the optical axis of which is parallel to the longitudinal axis of the x-ray emitter, two reflector, the first of which is installed on the optical axis of the laser before its first output end directed to the output window of the x-ray emitter, the second set on the optical axis of the laser before his second output end outside the projection on it of the output window of the x-ray emitter with the possibility of rotation around the axis perpendicular to the plane defined by the optical axis of the laser and the axis of the x-ray beam, means for indicating the focal length in the form of a pointer with a scale, fixed to the body of the centralizer, the two cylindrical lens mounted on the optical axis of the laser with the possibility of rotation around it and located respectively between the output ends of the laser and the reflector, and the focus lens is selected from the relation f=h/tgwhere h is the radius of the laser beam- the angle of radiation of the x-ray beam, characterized in that the first reflector mg src="https://img.russianpatents.com/chr/8805.gif" border="0">(D/2) from the axis of the x-ray beam along the beam, in addition centralizer contains a beam splitter mounted on the axis of the laser at an angle of 45° to it at a distance H(D/2) from the axis of the x-ray beam, the first additional reflector mounted on an axis perpendicular to the axis of the laser and passing through the center of the beam splitter, at a distance H(D/2) from the center of the beam splitter, the second additional reflector is mounted at an angle of 45° on an axis parallel to the axis of the x-ray beam and passing at a distance H(D/2) from it, at the point of intersection of this axis with the axis parallel to the axis of the laser and passing through the center of the first additional reflector, a third cylindrical lens disposed between the beam splitter and the first additional reflector on the axis connecting their centers, and installed in the position in which it generated and additional reflectors flat diverging laser beam extends in a plane passing through the axis of the x-ray beam perpendicular to the plane of propagation of the plane of the laser beam generated by the first cylindrical lens and the first reflector.



 

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FIELD: medical engineering.

SUBSTANCE: method involves forming X-ray radiation flow, letting pass it through filter transparent mainly for high power radiation spectrum portion of X-ray tube. The filter is mounted in front of volume under study. The X-ray radiation flow is directed to transducers for recording X-ray radiation quanta. Data are read from the transducers and image is built by applying computer software. An additional X-ray radiation flow is let pass through the filter transparent mainly for low power radiation spectrum portion of X-ray tube and mounted in front of volume under study. Another embodiment of the invention is characterized with scanning X-ray radiation flow being produced. High power radiation spectrum portion is directed to a transducers row for recording X-ray radiation quanta. X-ray radiation flow is additionally let pass through the filter transparent mainly for low power radiation spectrum portion of X-ray tube and mounted in front of volume under study. The X-ray radiation flow is directed to an additional transducers row for recording X-ray radiation quanta set in parallel to the available row.

EFFECT: high quality of diagnosis.

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