Laser centralizer for x-ray emitter
The invention relates to non-destructive testing using x-ray radiation and can be used to control materials and products radiation method in various engineering industries. In the laser centralizer, containing the indication of the focal length as a pointer with the scale used laser one-way output radiation. The optical scheme includes two reflector, two cylindrical lenses and a beam splitter mounted in front of the laser to its optical axis and directing the laser beam onto the second reflector. The first reflector using Electromechanical or other actuator located outside the range of the x-ray beam is driven into rotation about an axis coinciding with the normal to the first reflector and located outside the projection on it of the output window of the x-ray emitter. The speed is chosen from the condition nk·(twith)-1where n is the rotation frequency, Hz; tc-the exposure time x-ray, k=10-20 - factor. Provided relief from the operation of the laser of the centralizer. 1 Il.
Izabrano for control of materials and products radiation method 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 with the possibility of rotation around the axis perpendicular to the plane defined by the optical axis of the output laser radiation with the axis of the x-ray beam, and means for indicating the focal length in the form of a pointer with a scale attached to the body of the centralizer. The centralizer has two cylindrical lenses mounted on the axis of the laser radiation across each output beam and rotatably around the axis of the laser beam, the first between one of the end faces of the laser oscillator and the first reflector, the second between the second end of the laser emitter and the second reflector, and their focus is selected from a ratio
where h is the radius of the laser beam;
- angle Yugo bands, one of which is stationary and the other moves around the object to match with the image of the stationary strip, and at this point on the scale is read the distance to the object. When turning one of the cylindrical lenses at 90° image strips on the object are orthogonal, and their intersection point on the object coincides with the axis of the x-ray beam.
The disadvantage of this device is the use of laser with double-sided output radiation, complicated in operation and almost taken out of production.
In addition, the first reflector being in the x-ray beam in the vicinity of the focus x-ray tube has a heavy radial load, which leads to destructive changes in the structure of its material, which are shown on the x-ray image as artifacts that interfere with the decoding of the picture. It is essential that the material defects of the first reflector proektiruetsya in the registration plane radiographs greatly magnified because of its location near the focus of the emitter.
The purpose of the invention is the elimination of these disadvantages.
For this purpose, the centralizer is proposed to use the laser one-way output radiation, for example, halocene on the second reflector in the optical scheme of the centralizer entered the beam splitter, located before the laser on its optical axis. To eliminate the effect of artifacts from defects in the material structure of the first reflector located in the zone of high concentration of x-rays near the focus of the emitter, as well as to reduce the radial load on it the first reflector serves to rotate about an axis coinciding with the normal to its surface and outside the range of the x-ray beam using Electromechanical or other (pneumatic, piezoelectric, etc.,) actuator located outside the range of the x-ray beam.
The first reflector has a significant radiation exposure, and image artifacts from defects in its structure blurring of the image due to the dynamic effect of confusion.
The invention is illustrated by the drawing, which shows a General diagram of the device.
Laser centralizer contains the x-ray radiator 1, to which is attached the housing 2 placed in him by the laser 3, the optical axis of the output radiation which is parallel to the longitudinal axis of the x-ray emitter, two reflector 4 and 5, the first (4) of which, made of plexiglass, installed at the intersection of the optical axis of borota around the axis, perpendicular to the plane defined by the optical axis 8 of the output radiation of the laser with the axis 7 of the x-ray beam in the angle range 25-65°, and the second (5) mounted to rotate around an axis parallel to the axis of rotation of the first reflector, the indication of the focal length as a pointer 10 scale 11, fixed to the body 2 of the centralizer associated with the second reflector 5, and a beam splitter 9, mounted in front of the laser to its optical axis and directing the laser radiation flux on the second reflector 5, associated with the housing 2.
The centralizer includes cylindrical lenses 12 and 13, mounted on the optical axis of the laser beam, the first (12) is installed between the end face of the laser and the reflector 4 so that the object 6 is formed a vertical luminescent band, perpendicular to the plane formed by the intersection of the optical axis 7 of the x-ray emitter with the axis 8 of the laser, the second (13) is installed between the end face of the laser and the reflector 5 so that the object 6 control formed the second luminous strip parallel to the first and the moving object when the turns of the second reflector 5 parallel to the first strip.
The first reflector 4 is driven into rotation about the axis skogo emitter to avoid shielding of the x-ray beam elements drive rotation of the first reflector. For this purpose, the diameter of the first reflector, performed in a mirrored disk is selected as D||2l, where l is the size of the cross-section x-ray beam in the zone of location of the first reflector.
The rotational speed of the mirror is chosen from the condition nK(t)-1where n is the rotation frequency, Hz, t is the exposure time x-ray, C, K=10-20 - factor.
Almost for typical values t1 and K=10-20 Hz.
In the process of working with centralizer bring it to a controlled area of the object, see it laser stripes and rotating the second reflector 5, get them aligned and at this point with index 10 read scale 11, calibrated directly in focal lengths, the current value of the focal distance, i.e. the distance from the object to focus the x-ray tube.
Laser centralizer for x-ray emitter containing body located therein the laser optical axis 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 is completely rotate around the axis, perpendicular to the plane defined by the optical axis of the laser beam and the axis of the x-ray beam, means for indicating the focal length in the form of a pointer with a scale attached to the body of the centralizer, the two cylindrical lens mounted on the optical axis of the laser beam with the possibility of rotation around it, the first cylindrical lens mounted in front of the first reflector and the second before the second reflector, the focal length of the lenses are 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 it uses a laser with one-way output radiation and the optical system additionally introduced a beam splitter, mounted in front of the laser to its optical axis and directing the laser beam onto the second reflector associated with the housing, the first reflector using Electromechanical or other actuator located outside the range of the x-ray beam is driven into rotation about an axis coinciding with the normal to the first reflector and located outside the projection on it of the output window of the x-ray emitter, the rotational speed of nibiruexposed.com x-rays, k=10÷20 - factor.
FIELD: mechanical engineering; radiation method of inspection of materials and items.
SUBSTANCE: centering mount has housing inside which the laser is disposed as well as first reflector mounted onto axis of laser in front of exit window of X-ray radiator is the point where axis of laser crosses axis of X-ray beam, second reflector mounted onto axis of laser outside the projection of exit window of X-ray reflector for rotation relatively axis being perpendicular to plane formed by axes of laser beam and X-ray. Device also has aids for indicating focal length made in form of pointer provided with scale fixed onto housing of centering mount. Flat collimated laser beam forming system is mounted in front of laser. Laser beam propagates along plane being parallel to vertical plane crossing longitudinal axis of X-ray radiator. The axis is at the same time perpendicular to vertical plane crossing axis of X-ray beam. The second reflector is mounted at the exit of system at laser axis. Beam splitter is mounted between first and second reflectors. In front of the beam splitter there is the second semiconductor laser which is mounted onto axis being perpendicular to axis of laser to cross its point of crossing with beam splitter.
EFFECT: improved precision of measurements; simplified application.
FIELD: roentgen engineering; producing roentgenograms, for instance in medicine.
SUBSTANCE: proposed X-ray source module has X-ray tube incorporating body, cathode and anode assemblies, as well as generator unit incorporating high-rating voltage divider whose high-voltage lead is connected to one of tube assemblies; X-ray tube body is made in the form of metal cylinder accommodating sectionalized cylindrical high-voltage insulator. One of its ends is connected through vacuum-tight joint to one of body ends and other end mounts cathode assembly. Anode assembly is disposed on other end of body and is made in the form of anode tube brought outside the body that carries target on its loose end. Generator unit is disposed inside cylindrical high-voltage insulator whose inner space is filled with oil. Side surface of insulator functions as high-rating voltage divider.
EFFECT: reduced mass and size of module.
1 cl, 1 dwg
FIELD: roentgen diagnostics and therapy in medicine and various processes including flaw detection and scientific research.
SUBSTANCE: proposed X-ray pulse generator has X-ray tube effective surface area of whose point cathode and anode is not over 10-6 m2 and preset cathode-to-anode distance is minimum, 10-3 m; it also has high-voltage pulse generator whose heavy-current high-voltage pulse shaper is made in the form of heavy-current high-voltage vacuum or gas-discharge switching unit incorporating electrode that controls switching unit triggering and is provided with additional high-voltage filter inserted in its circuit. Linear size of X-ray radiator focal spot is 0.1-0.5 mm. X-ray quanta energy can be regulated between 20 and 150 keV; X-ray pulse length is about 10-8 to 10-6 s.
EFFECT: reduced size of X-ray tube.
1 cl, 1 dwg
FIELD: radiator positioning to object.
SUBSTANCE: newly introduced in proposed laser positioner are beam splitter disposed on laser axis between first reflector and first butt-end of laser at angle of 45 deg. to it axis, as well as third reflector disposed on axis drawn between point of intersection of beam splitter reflecting surface and laser axis perpendicular to this axis; beam splitter and third reflector are rigidly intercoupled and mounted on revolving flange whose axis is aligned with laser axis; it is set in rotary motion by means of motor drive, for instance that of frictional type, at frequency f ≥ 10 Hz mounted on positioner housing; reflecting surface of third reflector is tilted through angle β = 45° + α/4 to laser axis, where α is X-ray radiator angle of radiation; distance C between centers of beam splitter and third reflector is correlated with distance B along laser axis from center of first reflector to that of beam splitter by equation C=(A-B)·tg(α/2), where A is distance from X-ray radiator focus to first reflector center. This positioner incorporates provision for estimating X-rayed area of object and also for determining center of this area.
EFFECT: enlarged functional capabilities and facilitated determination of radiator-to-object distance.
1 cl, 1 dwg
FIELD: positioning radiator with respect to object.
SUBSTANCE: newly introduced in proposed positioner are optical wedge installed on laser optical axis for rotation relative to this axis at frequency f ≥ 10 Hz and at distance A from intersection point of X-ray beam and laser axes that equals distance from this point to X-radiator focus; drive for rotating optical wedge; first beam splitter installed on laser optical axis between optical wedge and first butt-end of laser at distance C > A from center of first reflector and at angle β < 45° to laser axis perpendicular to plane formed by laser and X-ray beam axes; second beam splitter made of plexiglas and installed on X-ray beam axis past first reflector at distance B from its center perpendicular to plane formed by X-ray beam and laser axes at angle γ to X-ray beam axis. Distances B and C as well as angles β and γ are interrelated by equations γ = 45° - β and β=c·tg(2β); optical wedge parameters (angle at θ vortex, ray deviation angle δ, and wedge material refractive index) are interrelated by equations δ = θ(n - 1) and δ = α/2, where α is X-radiation angle. This positioner enables estimation of X-rayed object area and also determination of center of this area.
EFFECT: enlarged functional capabilities, facilitated determination of distance from radiator to object.
1 cl, 4 dwg
FIELD: positioning radiator with respect to object.
SUBSTANCE: additionally introduced in positioner is rotor in the form of hollow cylinder revolving at frequency f ≥ 20 Hz whose axis of revolution is aligned with laser axis; rotor is disposed between first reflector and laser; optical raster in the form of combination of transparent and nontransparent bars of width t and height H is set on rotor butt-end disposed closer to laser; bar width is chosen from condition t = λ/sin(α/2, where λ is laser beam wavelength; α is X-radiator ray angle; bar height is chosen from relation H ≤ d, where d is laser beam diameter; mounted on other end of rotor is mask with central hole and two symmetrically disposed holes spaced apart through distance D; rotor length B on laser axis is found from expression B=kd/tg(α/2), where k = 1 - 2 is process coefficient and diametric line connecting centers of mask holes is perpendicular to direction of raster bars; distance A between raster and center of first reflector along lather axis equals distance from this center to X-ray tube focus on X-ray beam axis. Such positioner enables X-raying of object area as well as determination of center of this area.
EFFECT: enlarged functional capabilities and facilitated determination of distance from radiator to object.
1 cl, 4 dwg
FIELD: technology for orientation of x-ray emitter relatively to the object.
SUBSTANCE: laser localizer additionally comprises optical pattern, consisting of 4 groups of identical transparent and nontransparent bars with width t and height H, bars of each group are turned in pattern plane by 45° relatively to bars of adjacent groups and positioned symmetrically to laser axis, pattern is mounted on laser axis perpendicularly to it, in front of the pattern between it and the first deflector on the laser axis perpendicularly to it a nontransparent screen is mounted for screening laser rays of highest diffraction orders, screen having one central aperture for passage of laser rays of zero diffraction order and eight apertures for passage of laser rays, diffracted into ±1 diffraction order, which are positioned on the screen at certain diameter with 45° interval from each other and spatially combined with position of corresponding diffraction maximums of ±1 order in pattern plane.
EFFECT: defined area of the object being x-rayed, simplified procedure for determining center of the zone.
FIELD: medical engineering.
SUBSTANCE: device has tripod bearing X-ray therapy tube having radiation source and radiographic cone. The cone has cylindrical part having flange at one end provided with fastening members to be fixable in the X-ray tube and conic part on the other end. Protective lead aperture is available on the same side with the flange. Its inlet orifice diameter is less than the outlet orifice diameter for producing divergent conic X-ray beam. A through opening is available in the cylindrical portion of the X-ray cone arranged at an angle of 45-50° to its axis with laser radiator being placeable into it.
EFFECT: enhanced effectiveness in carrying out one-stage radiation therapy and laser radiation therapy of malignant diseases.
FIELD: physics; X-ray inspection.
SUBSTANCE: X-ray generator includes high DC voltage generator, X-ray tube in the form of a metallic enclosure, anode assembly with a target anode and window for the X-ray radiation output, cathode assembly in the form of a cathode with a filament and a cathode insulator, cathode filament power supply unit; the high DC voltage generator and the cathode filament power supply unit are located in the internal cavity of the cathode insulator, filled with dielectric material.
EFFECT: decrease in dimensions and weight and increase in reliability of device as whole.
2 cl, 1 dwg
SUBSTANCE: invention can be used for generating x-rays of high and/or low energy. The essence of the invention consists in that the electric power supply of the electron gun feeds the tube for the linear acceleration under the control of a control system, the microwave power supply accelerates the electron beams, generated through a tube for linear acceleration of electrons under the control of a control system; the tube for the linear acceleration of electrons is connected correspondingly to the electric power supply of the electron gun and the microwave power source for the generation of electron beams of high energy, the high-voltage power supply of the electron gun feeds the high-voltage electron gun under the control of a control system, the high-voltage electron gun is connected to the high-voltage power supply of the electron gun for generating electron beams of low energy, the object of radiation thus accepts electronic beams of high energy for generating X-rays of transfer of high energy, and/or accepts electronic beams of low energy to generate X-rays which reflect low energy. Technical result consists in the development of an extractor of X-rays of high and/or low energy, because of which is ensured the high quality of the forming of images and the large scale of regulation of electron beams.
EFFECT: ensuring the improvement of the quality of forming images and a large diapason of regulating of electron beams.
10 cl, 4 dwg