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
Title | Year | Author | Number |
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DIFFRACTIVE LASER LOCALIZER FOR X-RAY EMITTER | 2005 |
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RU2280965C1 |
LASER POSITIONER FOR X-RAY EMITTER | 2008 |
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RU2369995C1 |
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RU2254694C2 |
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|
RU2369049C1 |
Authors
Dates
2006-12-10—Published
2005-05-20—Filed