Optical device for converging and diverging X-ray
An optical device and X-ray technology, applied in the field of materials and optics, can solve the problems of low transmission efficiency and poor focusing effect of glass capillary, and achieve the effect of reducing light intensity loss, reducing roughness and improving transmission efficiency
Inactive Publication Date: 2011-11-02
BEIJING NORMAL UNIVERSITY
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[0003] For glass capillaries, the formula Where k is a proportionality coefficient. In the case of a certain reflective material density ρ, the higher the energy E of X-rays, the smaller the critical grazing angle θ of total reflection, the lower the transmission efficiency of the glass capillary, and the worse the focusing effect. Therefore, the current Glass capillary can only effectively converge X-rays with energy in the range of 0.2 to 40keV
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[0021] In the embodiment of the present invention, the critical grazing angle θ of total reflection is inversely proportional to the energy E of X-rays, and proportional to the square root of the density ρ of the reflective material. At the same time, according to the Waller-Debye formula It can be seen that as the roughness σ of the reflective surface gradually increases, the reflectivity R of X-rays will obviously decrease. Among them, the wavelength λ is inversely proportional to the energy of X-rays. That is to say, the larger the roughness σ is, the worse the effect of effectively converging high-energy X-rays is. An embodiment of the present invention provides an optical device for converging and diverging X-rays. While increasing the density ρ of the reflective material, the roughness σ of the reflective surface is reduced, thereby realizing the converging and diverging high-energy X-rays, and simultaneously filtering out low-energy X-rays. X-rays.
[0022] see fig...
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Abstract
The invention discloses an optical device for converging and diverging X-ray, which is used for realizing the low-energy X-ray filtering and the high-energy X-ray converging and diverging. The optical device comprises a solid element made of glass material, and the solid component adopts an ellipsoid platform; a metal film is plated on the side wall of the solid component; one end of the solid component is used for receiving X-ray, and the other end is used for outputting X-ray; a reflecting plane is formed on the critical plane between the glass material and the metal film, and the reflecting plane is used for the X-ray to be reflected when the X-ray is transmitted to the reflecting plane in the solid element and to be converged outside the other end.
Description
technical field [0001] The invention relates to the field of materials and optics, in particular to an optical device for converging and diverging X-rays. Background technique [0002] With the in-depth theoretical and experimental research of glass capillary by researchers, people have successfully realized the convergence of X-rays by using glass capillary. The glass capillary is hollow and has a smooth inner surface. The inner surface of the glass tube is used as a reflective surface to realize the total reflection of X-rays in the glass capillary, thereby realizing the convergence of X-rays. [0003] For glass capillaries, the formula Where k is a proportionality coefficient. In the case of a certain reflective material density ρ, the higher the energy E of X-rays, the smaller the critical grazing angle θ of total reflection, the lower the transmission efficiency of the glass capillary, and the worse the focusing effect. Therefore, the current The glass capillary can...
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IPC IPC(8): G21K1/06C03C17/06C03C3/091
Inventor 林晓燕李玉德刘志国孙天希潘秋丽罗萍谈国太程琳
Owner BEIJING NORMAL UNIVERSITY