Method and device to obtain an image of the phase change introduced by an object in penetrating radiation

 

The invention relates to the field of study of the structural characteristics of the object with penetrating radiation. The method of obtaining images of the phase change introduced by an object in penetrating radiation incident on the object includes irradiating the object with penetrating radiation having high lateral spatial coherence, and receiving at least part of the radiation detector after the radiation has emerged from the object, and obtaining at least two entries intensity of the received radiation, each of which includes intensity values at predetermined spatial intervals. These values are used to obtain a matrix of values that determine the image of the phase change introduced by an object in penetrating radiation. Recording the intensity of the receive permanent limited distance after the radiation has emerged from the object, and is referred to corresponding to different distributions of the energy of the detected radiation. The technical result is the ability to record data by electronic rather than mechanical changes in the conditions of image acquisition and the possibility of using two-dimensional energy dispersive detec is Sania faxing (see the graphical part)and

Claims

1. The method of obtaining the image of the phase change introduced by an object in penetrating radiation incident on the object, comprising irradiating the object with penetrating radiation having high lateral spatial coherence, and receiving at least part of the radiation detector after the radiation has emerged from the object, wherein the receive and write at least two entries intensity of the received radiation, each of which includes intensity values at predetermined spatial intervals, and use these values to obtain a matrix of values that determine the image of the phase change introduced by an object in penetrating radiation, and the fact that these records the intensity get the same limited distance after the radiation has emerged from the object, and is referred to corresponding to different distributions of the energy of the detected radiation.

2. The method according to p. 1, in which the energy distribution is obtained by change of the energy spectrum of radiation, irradiating the object.

3. The method according to p. 1, in which the relevant razlik the energy function in a certain energy range or ranges.

4. The method according to p. 1, 2 or 3, in which the above-mentioned calculation of the mentioned matrix of values includes one or more differential equations of the transmission intensity of the binding phase in the plane of the object by changing the intensity distribution along the direction of propagation, using predefined constant boundary conditions.

5. The method according to p. 1, 2 or 3, in which the above-mentioned calculation of the mentioned matrix values, includes optical equations Fourier.

6. The method according to any of the preceding paragraphs, in which the said intensity values also reflect the contrast of the absorption in the object, and the method further includes the use of the above values to find the matrix of values that determine the actual net absorbing-contrast image of the object.

7. The method according to any of the preceding paragraphs, which referred to penetrating radiation includes radiation of x-rays.

8. The method according to p. 7, which referred to the radiation of x-rays is in the range from 0.5 Kev to 1 MeV.

9. The method according to p. 7 or 8, which referred to the irradiating radiation is substantially monochromatic.

10. The way of PP.7-10, which referred to ionizing radiation comes from essentially a point source with a full-width half-maximum 40 μm or less.

12. Device to obtain an image of the phase change introduced by an object in penetrating radiation incident on the object that contains the source for irradiating the object with penetrating radiation having high lateral spatial coherence, and a detector for receiving at least part of the said radiation after the radiation has emerged from the object, wherein the detector for receiving produces at least two entries intensity of the received radiation, each of which includes intensity values at predetermined spatial intervals, and the detector is designed to receive the mentioned records the intensity on the same limited distance after as the radiation has emerged from the object, and the fact that it provides a means of characterizing the energy by which these records intensity are respectively for different distributions of energy detektirovanie radiation.

13. The device according to p. 12, in which the said means for characterizing the energy is glasto, characterizing energy, includes a translation tool data detector, providing the intensity as a function of energy in a certain energy range or ranges.

15. The device according to p. 12, 13 or 14, which further includes computer software device that contains a set of machine-readable commands, which, being installed in a computer having a suitable operating system and memory means, configures the computer so that he could work to use the above-mentioned values to find the matrix of values defining an image of the phase change introduced by an object in penetrating radiation.

16. The device according to p. 15, in which the said calculation of the mentioned matrix of values includes one or more differential equations of the transmission intensity of the binding phase in the plane of the object by changing the intensity distribution along the direction of propagation, using predefined constant boundary conditions.

17. The device according to p. 15, in which the said calculation of the mentioned matrix values, includes optical equations Fourier.

18. Device according to any one of paragraphs.12-17, in which the source of radiation about the mentioned radiation of x-rays is in the range from 0.5 Kev to 1 MeV.

20. The device under item 18 or 19, in which the aforementioned ionizing radiation is substantially monochromatic.

21. The device under item 18 or 19, in which the aforementioned ionizing radiation is polychromatic.

22. Device according to any one of paragraphs.18-21, in which the said source is substantially a point source with a full-width half-maximum 40 μm or less.

23. The method of obtaining the image of the phase change introduced by an object in penetrating radiation incident on the object from one or more two-dimensional record of the intensity of the penetrating radiation after it has passed through the object, and the radiation has a high lateral spatial coherence, as it falls on the object, and record or each of the records obtained in a limited distance after the radiation has emerged from the object, includes a phase-perturbed, either uniformly phase-perturbed, either phase is not disturbed, the components in the surrounding radiation field, characterized in that to store the intensity values from the record or each entry with a predetermined spatial intervals, using these values and a predefined constant boundary conditions to find the matrix values,antilego equations of transmission intensity, linking phase in the output plane of the object by changing the intensity distribution along the direction of propagation.

24. The method of obtaining the image of the phase change introduced by an object in penetrating radiation incident on the object, comprising irradiating the object with penetrating radiation having high lateral spatial coherence, receiving at least part of the above-mentioned radiation detector at one or more limited distance after the radiation has been released from the facility, including the phase-perturbed, either uniformly phase-perturbed, either phase is not perturbed components in the ambient radiation field, wherein the receive and record the values of the intensity of the received radiation at predetermined spatial intervals, and use these values and constant boundary conditions to find the matrix of values defining an image of the phase change introduced by an object in penetrating radiation, by solving the differential equations of the transmission intensity of the binding phase in the object plane with the change of the intensity distribution along the direction of propagation.

25. The method according to p. 23 or 24, which includes the use of the above values to find the matrix values determining the actual net absorbing-contrast image of the object.

26. The method according to p. 23, 24 or 25, which referred to penetrating radiation includes radiation of x-rays.

27. The method according to p. 26, which referred to the radiation of x-rays is in the range from 0.5 Kev to 1 MeV.

28. The method according to p. 26 or 27, which referred to the irradiating radiation is substantially monochromatic.

29. The method according to p. 26 or 27, which referred to the irradiating radiation is polychromatic.

30. The method according to p. 29, by which the above equation includes the spectral weighted member or a coefficient depending on the square of the respective component wavelengths.

31. The method according to any of paragraphs.23-30, on which the mentioned boundary conditions include constant Dirichlet, Neumann or periodic boundary conditions are chosen so as to achieve the only solutions of the equation for the phase, at least according to an arbitrary constant component.

32. The method according to p. 30. which solution also uses one or more of optical conditions selected from the group consisting of the lesser curvature of the wave front of the incident radiation, no points flutie intensity values also reflect the contrast of the absorption in the object, this method further includes the use of the above values to find the matrix of values that determine the actual net absorbing-contrast image of the object.

34. The method according to p. 24, which referred to penetrating radiation includes radiation of x-rays.

35. The method according to p. 34, which referred to the radiation of x-rays is in the range from 0.5 Kev to 1 MeV.

36. The method according to p. 34, which referred to the irradiating radiation is substantially monochromatic.

37. The method according to p. 34, which referred to the irradiating radiation is polychromatic.

38. The method according to p. 37, on which the above equation includes the spectral weighted member or a coefficient depending on the square of the respective component wavelengths.

39. The method according to p. 24, on which the mentioned boundary conditions include constant Dirichlet, Neumann or periodic boundary conditions are chosen so as to achieve the only solutions of the equation for the phase, at least according to an arbitrary constant component.

40. The method according to p. 39, in which the solution also uses one or more of optical conditions selected from the group consisting of moms and uniform illumination of the object.

41. Device to obtain an image of the phase change introduced by an object in penetrating radiation incident on the object that contains the source for irradiating the object with penetrating radiation having high lateral spatial coherence, and a detector for receiving at least part of the above-mentioned radiation in a limited distance after the radiation has emerged from the object, including the phase-perturbed, either phase is not disturbed, either uniformly phase-perturbed components in the ambient radiation field, wherein the detector for receiving generates intensity values for the received radiation at predetermined spatial intervals, and the it contains a computer, including a recorded program of machine-readable commands, able to work to use the above-mentioned values and the predefined constant boundary conditions to find the matrix of values defining an image of the phase change introduced by an object in penetrating radiation, by solving the differential equations of the transmission intensity of the binding phase in the plane of the object by changing the intensity distribution along the direction of propagation.

 

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