Integrated part of photodiode and central light beam shielding device for X-ray instrument

Abstract

The utility model provides an integrated assembly of a photodiode and a central light beam shielding device for an X-ray instrument, and relates to the field of X-ray instruments. The device is composed of a beam diaphragm tube, a photodiode component, a central beam shielding device component, a supporting plate, a base and a translation assembly. Wherein the photodiode is arranged in the beam diaphragm tube, and the photodiode and the beam diaphragm tube jointly form a central beam shielding device; one end of the supporting plate is connected with the beam diaphragm tube through the through holes and the jackscrew, and the other end of the supporting plate is connected with the base through more than one through hole; the base is connected with the translation assembly base through more than one through hole. Under the condition that the functions of the original components are maintained, the two common components, namely the photodiode and the central light beam shielding device, are integrated together, and the spatial position of the integrated component is finely adjusted through the translation component, so that the experimental steps are simplified, and the experimental stability and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the field of X-ray instruments, and more specifically to an integrated component of a photodiode and a central beam blocker used in X-ray instruments. Background Art

[0002] X-ray instrument is an optical instrument based on X-ray. X-ray is an electromagnetic wave with a very short wavelength. In the spectrum range table, the wavelength range of X-ray is just at the same order of magnitude as the size of the material unit. X-ray instrument obtains information such as the composition, structure and properties of the material by detecting the outgoing wave after X-ray penetrates the material and its diffraction wave in the far field. It can easily obtain the material composition and microstructure information of various materials and has a wide range of applications in materials, biology, environment and other fields. X-ray instrument is mainly composed of X-ray generator, sample platform, optical element, X-ray detector and data processing system. Among them, photodiode and central beam blocker are important components in optical elements.

[0003] Photodiodes are semiconductor devices that convert optical signals into electrical signals. Compared with other photoconductive materials, photodiodes have better linearity and are often used to accurately measure light intensity in research. The intensity and energy of the X-rays generated by the X-ray generator are adjusted to the appropriate range required by the experiment based on the intensity and energy of the X-rays measured by the photodiode. The central beam blocker is a device used in diffraction data collection instruments to block the central zero-order diffraction. Since the intensity of the zero-order diffraction fringe is very high, failure to block it will damage the X-ray detector and affect the observation of the surrounding diffraction points.

[0004] When using an X-ray instrument to conduct experiments, it is necessary to first adjust the intensity, energy, and incident divergence angle of the X-rays generated by the X-ray generator according to the experimental requirements. During the adjustment process, a photodiode is needed to detect the intensity and energy of the X-rays. After the X-rays meet the experimental requirements, a central beam blocker is needed to block the central zero-order diffraction of the X-rays to reduce the impact of the zero-order diffraction on the surrounding diffraction points and damage to the detector. In the existing conventional instrument design, the photodiode and the central beam blocker are installed as two independent components in the instrument optical path system. During the experiment, the optical path alignment of the two components needs to be adjusted separately, which increases the process and complexity of the experiment and reduces the efficiency of the experiment and the accuracy of the experimental data. Utility Model Content

[0005] In view of this problem encountered in the experiment, the utility model proposes an integrated component of a photodiode and a central blocker for an X-ray instrument, so that during the experiment, only one component position adjustment is required to achieve a better experimental effect than the original two components are adjusted independently. The experimental steps and processes are simplified, and the efficiency and accuracy of the experiment are improved.

[0006] In the present invention, the optical path direction of the X-ray beam is the x-axis, the incident direction of the X-ray is the negative direction of the x-axis, the direction of the horizontal plane perpendicular to the x-axis is the y-axis, and the vertical direction is the z-axis, and the three axes are perpendicular to each other.

[0007] The technical solution of the utility model is as follows:

[0008] An integrated component of a photodiode and a central beam blocker of an X-ray instrument includes a beam stop tube, a photodiode component, a central beam blocker component, a support plate, a base and a translation assembly. The photodiode is inside the beam stop tube, and the two together form the central beam blocker; one end of the support plate is connected to the beam stop tube through a through hole and a top screw, and the other end of the support plate is connected to the base through more than one through hole; the base is threadedly connected to the base of the translation assembly through a through hole.

[0009] In some preferred embodiments, the beam stop tube is a metal tube-shaped component that is cylindrical in shape. A groove is punched at one end of the beam stop tube from the positive direction of the x-axis to install the photodiode, and the other end is solid to block the zero-order diffraction of the central diffraction of the light beam. A through hole is punched in the z-axis direction of the beam stop tube as a fixing groove, and a top screw hole is punched in the opening portion in the y-axis direction to connect with the groove, so as to fix the beam stop tube on the support plate.

[0010] In some preferred embodiments, the support plate is a processed metal plate with a groove in the positive direction of the x-axis, which is a photodiode wire slot. One end of the support plate is connected to the beam stop tube, and the other end is used as a support section, which has more than one through hole for installation and is connected to the base.

[0011] In some preferred embodiments, the base is a rectangular metal plate with more than one through hole, and the support plate and the translation assembly are connected by threads through the through holes.

[0012] In some preferred embodiments, the translation assembly includes an x-direction translation stage, a y-direction translation stage, and a z-direction translation stage. The three translation stages are responsible for the three-dimensional movement of the support plate, which helps to align the integrated components of the photodiode and the central beam stopper in the optical path.

[0013] The benefits of the utility model are:

[0014] There is a three-dimensional component that can be translated in three dimensions to ensure that the photodiode and the central beam blocker can accurately maintain alignment in the optical path, ensuring the accuracy of the experiment. The cable of the photodiode is located in the groove of the support plate and will not interfere with the rays. At the same time, the photodiode can receive X-rays during the experiment and respond to the intensity and energy changes of the X-rays in real time, which is conducive to the stability of the experiment. Integrating the two optical components of the photodiode and the central beam blocker into one optical component, using one component to achieve two functions, greatly simplifies the experimental process, improves the efficiency of the experiment and the stability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the connection of the three-dimensional moving assembly with the integrated components of the photodiode and the central beam stopper through the base and the support plate.

[0016] Figure 2 Schematic diagram of the connection between the support plate and the integrated component of the photodiode and the central beam stopper.

[0017] Figure 3 This is a front view of the X-ray incident direction when the utility model is installed on an X-ray instrument.

[0018] In the figure: 1- beam stop tube, 2- support plate, 3- base, 4- z direction translation stage, 5- y direction translation stage, 6- x direction translation stage, 101- photodiode, 102- fixing groove, 103- top screw hole, 201- wire groove, 202- support section. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the present application example, the following is a detailed description of an actual embodiment of an integrated component of a photodiode and a central beam blocker for an X-ray instrument in conjunction with the drawings in the embodiments of the present utility model. The described example is only a part of the application embodiment of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary engineering and technical personnel in this field without creative work are within the protection scope of the present utility model.

[0020] like Figure 2 As shown, the support plate 2 is a metal plate bent twice, one end of which is a support section 202, which is a rectangular plane with more than one through hole for connecting with the base 3. The other end is used to connect and fix the beam stop tube 1, and has a protrusion matching the fixing groove of the beam stop tube 1, which can be inserted into the fixing groove 102 of the beam stop tube 1. A concave wire groove 201 is opened on the side of the support plate to collect the connection wire of the photodiode 101.

[0021] like Figure 2As shown, the beam stop tube 1 is a metal tube-shaped component, which is cylindrical in shape. A groove is formed on the bottom surface of one end for mounting the photodiode 101, and a fixing groove 102 and a top screw hole 103 are formed on the side surface for connecting with the support plate 2. When the beam stop tube 1 is assembled with the support plate 2, after the protruding part of the support plate 2 is inserted into the fixing groove 102, the top screw is screwed into the top screw hole 103 to fix it, and the tail of the top screw does not leak out of the top screw hole. At this time, the beam stop tube 1 and the support plate 2 are connected as a whole.

[0022] like Figure 1 As shown, the support plate 2 and the base 3, and the base 3 and the z-direction translation stage 4 are fixed through through holes to ensure that the three-dimensional translation stage can accurately control the position of the beam stop tube 1 in space.

[0023] During the experiment, the position of the beam stop tube 1 is first moved by adjusting the z-direction translation stage 4, the y-direction translation stage 5 and the x-direction translation stage 6 so that the central axis of the beam stop tube 1 is on the same horizontal line as the light used in the experiment, and the collimation work of the photodiode 101 and the central beam blocker in the light path is completed at the same time. At this time, the photodiode 101 is first used to collect the information of the incident X-ray beam, so as to adjust the X-rays emitted by the X-ray generator so that the beam meets the experimental requirements. In the experiment, the beam stop tube 1 blocks the direct light and the excessive central diffraction light to extend the detector's acquisition time for high-frequency signals, improve the spatial resolution of the final imaging, and also reduce the damage to the detector caused by excessive light, effectively extending the service life of the detector.

[0024] Finally, it should be noted that the above is only a preferred example of the present invention and is not intended to limit the present invention. Based on the above description of the embodiments, a person skilled in the art can easily modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and scope of the present invention should be included in the content of the present invention.

Claims

1. An integrated component of a photodiode and a central beam blocker of an X-ray instrument, characterized in that It includes a beam stop tube, a photodiode component, a central beam blocker component, a support plate, a base and a translation component; the photodiode is inside the beam stop tube, and the two together constitute the central beam blocker; one end of the support plate is connected to the beam stop tube through a through hole and a top screw, and the other end of the support plate is connected to the base through more than one through hole; the base and the translation component are threadedly connected through the through hole.

2. The integrated component of a photodiode and a central beam blocker of an X-ray instrument as claimed in claim 1, characterized in that: The beam stop tube is a cylindrical metal tube-shaped component. One end of the beam stop tube has a groove along the axial direction for installing a photodiode, and the other end is solid for blocking the central diffraction zero order of the light beam. A through hole and a top thread hole are opened on the side surface of the beam stop tube.

3. The integrated component of a photodiode and a central beam blocker of an X-ray instrument as claimed in claim 1, characterized in that: The support plate is a processed metal plate with a groove on one side, which is a photodiode line slot; one end of the support plate is connected to the beam stop tube, and the other end is punched with more than one through hole.

4. The integrated component of a photodiode and a central beam blocker of an X-ray instrument as claimed in claim 1, characterized in that: The base is a rectangular metal plate with more than one through hole.

5. The integrated component of a photodiode and a central beam blocker of an X-ray instrument as claimed in claim 1, characterized in that: The translation assembly comprises three translation stages with translation directions perpendicular to each other, which are responsible for the three-dimensional movement of the support plate.

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