X-ray position measuring and calibration device
First Claim
1. A calibration system for determining the angular directions θ
- , φ
of a beam of radiation, said system comprising;
a radiation source generating said beam of radiation at said angular direction θ
measured with respect to a first direction;
a first reference element exposed to said beam of radiation and separated from said radiation source by a distance of approximately Z1 ;
a second reference element exposed to said beam of radiation and separated from said first reference element by a predetermined distance H;
an image detector producing a first image of said first reference element and a second image of said second reference element; and
an angle measurement device calculating said angle θ
from said distances H and Z1.
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Accused Products
Abstract
A calibration system having a radiation source that generates the beam of radiation along the angular directions θ, φ. A first reference element which is separated from the radiation source by a distance of approximately Z1 is then exposed to the beam of radiation. A second reference element is also present which is separated from the first reference element by a predetermined distance H and is exposed to the beam of radiation. An image detector produces images of the first and second reference elements, wherein the images are separated from each other by a distance R and angle φ. The device further includes an angle measurement device that calculates θ from the values of Z1 and H. A position measurement device having first and second sources of radiation that generate respective first and second beams of radiation directed at angles θ1, φ1, and θ2, φ2 respectively, toward an object of interest. An image detector is provided for producing 1) a first image of the object of interest formed by the first beam of radiation and 2) a second image of the object of interest formed by the second beam of radiation and that is separated from the first image by a distance L. A coordinate device then determines the coordinate of the object of interest from the values of θ1, θ2 and L.
53 Citations
66 Claims
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1. A calibration system for determining the angular directions θ
- , φ
of a beam of radiation, said system comprising;a radiation source generating said beam of radiation at said angular direction θ
measured with respect to a first direction;a first reference element exposed to said beam of radiation and separated from said radiation source by a distance of approximately Z1 ; a second reference element exposed to said beam of radiation and separated from said first reference element by a predetermined distance H; an image detector producing a first image of said first reference element and a second image of said second reference element; and an angle measurement device calculating said angle θ
from said distances H and Z1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- , φ
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17. A method of calibration for determining the angular directions θ
- , φ
of a beam of radiation from a radiation source, said method comprising the steps of;generating said beam of radiation at said angular direction θ
measured with respect to a first direction;positioning a reference element at a first position which is a distance of approximately Z1 from said radiation source; exposing said reference element at said first position to said beam of radiation; positioning a reference element at a second position which is a predetermined distance H from said first position; exposing said reference element at said second position to said beam of radiation; producing a first image of said reference element at said first position and a second image of said reference element at said second position; and calculating said angle θ
from said distances H and Z1. - View Dependent Claims (18, 19, 20, 21, 22)
- , φ
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23. A position measurement device for measuring a coordinate of an object of interest, said device comprising:
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a first source of radiation generating a first beam of radiation directed at angles θ
1, φ
1 towards said object of interest;a second source of radiation generating a second beam of radiation directed at an angle θ
2, φ
2 towards said object of interest;an image detector for producing
1) a first image of said object of interest formed by said first beam of radiation and
2) a second image of said object of interest formed by said second beam of radiation and that is separated from said first image by a distance L; anda coordinate device for determining said coordinate of said object of interest from the values of θ
1, θ
2 and L. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of measuring a coordinate of an object of interest, said method comprising the steps of:
-
generating a first beam of radiation directed at angles θ
1, φ
1 toward said object of interest;generating a second beam of radiation directed at an angle θ
2, φ
2 toward said object of interest;producing a first image of said object of interest formed by said first beam of radiation; producing a second image of said object of interest formed by said second beam of radiation and that is separated from said first image by a distance L; and determining said coordinate of said object of interest from the values of θ
1, θ
2 and L. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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41. A position measurement system for measuring a coordinate of an object of interest, said system comprising:
-
a first source of radiation generating a first beam of radiation at unknown angles θ
1 and φ
1 ;a second source of radiation generating a second beam of radiation at unknown angles θ
2 and φ
2 ;a placement device that positions either a calibration element having a first reference element and a second reference element separated from said first reference element by a predetermined distance H or an object of interest so that said first and second beams of radiation irradiate either said reference object or said object of interest; an image detector for imaging either said reference object or said object of interest when irradiated by said first and second beams of radiation wherein; 1) when said calibration element is irradiated by said first beam of radiation said image detector produces a first image of said first reference element and a second image of said second reference element displaced from a point at which said first beam of radiation intercepts said image detector by R11 and R12, respectively; and
when said calibration element is irradiated by said second beam of radiation said image detector produces a first image of said first reference element and a second image of said second reference element displaced from a point at which said second beam of radiation intercepts said image detector by R21 and R22, respectively; and2) when said object of interest is irradiated by said first and second beams of radiation a first image of said object of interest formed by said first beam of radiation and second image of said object of interest is formed by said second beam of radiation that is separated from said first image by a distance L; an angle measurement device calculating θ
1 from said distances R11, R12 and H and calculating θ
2 from said distances R21, R22, and H;a coordinate device for determining said coordinate from the calculated values of θ
1, θ
2 and L. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A calibration system for determining the angular directions θ
- , φ
of a beam of radiation, said system comprising;a radiation source generating said beam of radiation at said angular direction θ
measured with respect to a first direction;a reference element at a first position which is exposed to said beam of radiation and separated from said radiation source by a distance of approximately Z1 ; a movement device for moving said reference element to a second position which is separated from said first position by a predetermined distance H, wherein said reference element at said second position is exposed to said beam of radiation; an image detector producing a first image of said reference element at said first position and a second image of said reference element at said second position; and an angle measurement device calculating said angle θ
from said distances H and Z1. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
- , φ
Specification