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Optical device for converging X-ray

An optical device and X-ray technology, which is applied in the field of materials and optics, can solve the problems of poor focusing effect and low transmission efficiency of tapered glass capillary, and achieve the effects of reducing light intensity loss, reducing roughness, and improving transmission efficiency

Inactive Publication Date: 2012-01-11
BEIJING NORMAL UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

[0003] Since the higher the energy of X-rays, the smaller the critical grazing angle of total reflection, the lower the transmission efficiency of the tapered glass capillary, and the worse the focusing effect, so the current glass capillary can only effectively converge X-rays with an energy range of 0.2 to 40keV

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  • Optical device for converging X-ray
  • Optical device for converging X-ray
  • Optical device for converging X-ray

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Embodiment Construction

[0020] 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 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 X-rays. While increasing the density ρ of the reflective material, the roughness σ of the reflective surface is reduced, so as to achieve converging high-energy X-rays and simultaneously filter out low-energy X-rays.

[0021] see figure 1 , the optical device in this embodiment includes: ...

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Abstract

The invention discloses an optical device for converging X-ray, which is used for realizing the low-energy X-ray filtering and the high-energy X-ray converging. The optical device comprises a solid component made of glass material, and the solid component adopts an axially symmetric structure; 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 totally reflected when the X-ray is transmitted to the reflecting plane in the solid component 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 X-rays. Background technique [0002] Since 1948, people have studied how to use a single tapered glass capillary to converge X-rays. With the deepening of theoretical and experimental research on tapered capillaries, people successfully realized the use of a single tapered capillary in the middle and late 1980s. A tapered glass capillary converges the X-rays. The tapered glass capillary is hollow and has a smooth inner surface. The inner surface of the glass tube is a reflective surface, which realizes the total reflection of X-rays in the tapered glass capillary, thereby realizing the convergence of X-rays. [0003] Since the higher the energy of X-rays, the smaller the critical grazing angle of total reflection, the lower the transmission efficiency of the tapered glass capillary, and the worse the focusing effect, so the current glass cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21K1/06C03C17/06C03C3/091
Inventor 李玉德刘志国林晓燕孙天希潘秋丽罗萍谈国太程琳
Owner BEIJING NORMAL UNIVERSITY