Light path structure of X-ray fluorescence spectrophotometer

Abstract

The utility model provides a light path structure of an X-ray fluorescence spectrophotometer, which comprises an optical filter, a prism with a hole and a collimator, the optical filter, the prism with the hole and the collimator are sequentially arranged between an X-ray tube of the X-ray fluorescence spectrophotometer and a sample to be tested, and X-rays emitted by the X-ray tube sequentially pass through the optical filter and the prism with the hole and are reflected by the collimator. X-rays and first visible light output by the prism with the hole reach the sample after passing through the collimator, and second visible light output by the prism with the hole enters the camera. According to the utility model, the distance between the collimator and a sample is shortened, so that the collimator hole can be enlarged, and the ray efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of X-ray fluorescence spectrometers, in particular to an optical path structure of an X-ray fluorescence spectrometer. Background Art

[0002] Figure 1 FIG. 2 shows the optical path structure of an X-ray fluorescence spectrometer in the prior art. Figure 1 As shown, the existing optical path is that the X-ray tube generates X-rays which pass through the filter, collimator and reflective film in sequence and then irradiate the sample, and the visible light is confocal with the X-rays after passing through the reflective film.

[0003] In the existing optical path, there is a reflective film between the collimator and the sample, and the distance between the collimator and the sample cannot be shortened again, resulting in the actual focal spot size of the X-ray to the sample plane being twice the collimator aperture, which makes the ray efficiency low. For example, in the existing optical path structure, when the actual focal spot diameter is 2mm, the collimator aperture can only be 1mm, and it is impossible to obtain a high count rate while testing a small sample (small focal spot). Utility Model Content

[0004] The utility model provides an optical path structure of an X-ray fluorescence spectrometer to solve at least one of the above technical problems.

[0005] To solve the above problems, as one aspect of the utility model, an optical path structure of an X-ray fluorescence spectrometer is provided, comprising: a filter, a prism with holes as a reflector, and a collimator, which are sequentially arranged between an X-ray tube of the X-ray fluorescence spectrometer and a sample to be tested. The X-rays emitted by the X-ray tube pass through the filter and the prism with holes in sequence, the X-rays and the first visible light output by the prism with holes reach the sample after passing through the collimator, and the second visible light output by the prism with holes enters a camera.

[0006] Preferably, the X-ray tube, filter, perforated prism, collimator and sample are arranged on the same straight line.

[0007] Preferably, the aperture of the collimator is 1.6 mm.

[0008] The utility model shortens the distance between the collimator and the sample, thereby increasing the collimator hole and improving the ray efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The optical path structure of an X-ray fluorescence spectrometer in the prior art is schematically shown;

[0010] Figure 2 The optical path structure of the X-ray fluorescence spectrometer in the utility model is schematically shown. DETAILED DESCRIPTION

[0011] The following is a detailed description of the embodiments of the present invention, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0012] As one aspect of the utility model, an optical path structure of an X-ray fluorescence spectrometer is provided, comprising: a filter, a prism with holes as a reflector, and a collimator, which are sequentially arranged between an X-ray tube of the X-ray fluorescence spectrometer and a sample to be tested, wherein the X-rays emitted by the X-ray tube pass through the filter and the prism with holes in sequence, the X-rays and the first visible light output by the prism with holes reach the sample after passing through the collimator, and the second visible light output by the prism with holes enters a camera.

[0013] Preferably, the X-ray tube, filter, prism with holes, collimator and sample are arranged on the same straight line. Preferably, the aperture of the collimator is 1.6 mm.

[0014] In the optical path of the utility model, the X-rays generated by the X-ray tube pass through the filter in sequence, and then irradiate the sample after the three-lens mirror (with holes) collimator, and the visible light is confocal with the X-rays after passing through the three-lens mirror (with holes).

[0015] In the above technical solution, the utility model places the three mirrors (reflectors) below the collimator, shortening the distance between the collimator and the sample. Compared with the prior art, when the actual focal spot size is 2mm, the optical path collimator aperture in the prior art can only be 1mm, but the collimator aperture in the utility model can be 1.6mm. Since increasing the collimator aperture can effectively improve the ray efficiency under the same focal spot size, the utility model increases the collimator aperture, allowing more rays to pass through, thereby increasing the count rate.

[0016] The utility model shortens the distance between the collimator and the sample, thereby increasing the collimator hole and improving the ray efficiency.

[0017] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An optical path structure of an X-ray fluorescence spectrometer, characterized in that: include: A filter, a prism with a hole as a reflector, and a collimator are sequentially arranged between the X-ray tube of the X-ray fluorescence spectrometer and the sample to be tested. The X-rays emitted by the X-ray tube pass through the filter and the prism with a hole in sequence. The X-rays and the first visible light output by the prism with a hole reach the sample after passing through the collimator. The second visible light output by the prism with a hole enters the camera.

2. The optical path structure of the X-ray fluorescence spectrometer according to claim 1, characterized in that: The X-ray tube, filter, prism with holes, collimator and sample are arranged on the same straight line.

3. The optical path structure of the X-ray fluorescence spectrometer according to claim 1, characterized in that: The aperture of the collimator is 1.6 mm.

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