Replaceable standard substance target

Abstract

The utility model relates to a solid standard substance target required in laser ablation, in particular to a replaceable standard substance target, which is characterized in that the top surface of a target sleeve is provided with through holes in one-to-one correspondence with target position holes in the same number, and the bottom surface of the target sleeve is provided with cover plate holes in one-to-one correspondence with the target position holes in the same number; each target position hole is respectively communicated with the corresponding through hole and the corresponding cover plate hole, the diameter of the through hole is smaller than that of the target position hole, and a cover plate is put into the communicated target position hole from each cover plate hole; a small standard substance target is accommodated in each target position hole, a spring is arranged at the bottom of each small standard substance target, and two ends of the spring are respectively propped against the small standard substance target and the cover plate so as to fix the small standard substance target. The standard substance small target is simple to operate, the standard substance small target can be replaced by rotating the cover plate and taking out the spring, different types of standard substances can be flexibly used when different types of samples are subjected to laser in-situ micro-area analysis, the use efficiency of a limited space of a sample bin is improved, and waste of precious standard substances is reduced.

Description

Technical Field

[0001] The utility model relates to a solid standard material target required in laser in-situ micro-area analysis, in particular to a replaceable standard material target. Background Art

[0002] In recent years, with the widespread application of laser in-situ microanalysis, new standard materials have emerged to meet the needs of testing and analyzing different samples. However, this also makes the original standard material targets unable to efficiently meet the requirements of laser in-situ microanalysis of diversified samples. Since several different standard materials are involved as standard samples in laser in-situ microanalysis, there are generally two ways to make targets with epoxy resin: (1) four to five mineral standard materials are placed on a cylindrical resin target with a diameter of 2.54 cm; (2) each mineral standard material is placed on a cylindrical resin target with a diameter of 15 mm. The former method can effectively save sample compartment space, but in actual use, it is necessary to select the appropriate standard sample according to the test requirements, so the same standard sample is not used every time. In the long run, when the standard sample needs to be polished, it will cause unnecessary waste of other unused standard samples on the same target. The latter method can flexibly select appropriate standard samples according to the actual sample testing needs, thereby effectively solving the problem of wasting precious standard samples. However, this will cause the standard target to occupy the limited space of the sample chamber in each test, greatly reducing the number of samples that can be placed in the sample chamber at the same time, thereby requiring frequent sample replacement, greatly reducing the analysis and usage time of the laser itself.

[0003] To avoid unnecessary waste of precious reference materials, while also improving sample chamber efficiency and reducing sample replacement frequency, it is necessary to effectively address the drawback of standard materials being unable to be concentrated on a single target. Therefore, a centralized yet flexible reference material target is needed that can hold multiple standards simultaneously and be replaced as needed. Utility Model Content

[0004] In view of the problem that existing standard material targets cannot be concentrated on the same target, the purpose of the present utility model is to provide a replaceable standard material target.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] The utility model includes a target sleeve, a spring, a small target of standard material and a cover plate, wherein a plurality of target position holes are uniformly opened on the target sleeve along the circumference, the top surface of the target sleeve is opened with through holes that are the same in number and one-to-one corresponding to the target position holes, the bottom surface of the target sleeve is opened with cover plate holes that are the same in number and one-to-one corresponding to the target position holes, each of the target position holes is respectively connected with the corresponding through hole and cover plate hole, the diameter of the through hole is smaller than the diameter of the target position hole, and a cover plate is placed into the connected target position hole through each cover plate hole; a small target of standard material is accommodated in each target position hole, and a spring is provided at the bottom of each small target of standard material, and the two ends of the spring are respectively in contact with the small target of standard material and the cover plate, thereby fixing the small target of standard material.

[0007] Wherein: a protrusion is provided radially outward on the outer edge of the cover plate, the shape of the cover plate hole opened on the bottom surface of the target sleeve is the same as the shape of the protrusion, and the cover plate hole has a protrusion groove corresponding to the protrusion; when the cover plate is placed from the cover plate hole into the target hole, the protrusion passes through the protrusion groove, and then when the cover plate is rotated, the protrusion on the cover plate abuts against the bottom surface of the target hole, thereby realizing the limiting of the cover plate.

[0008] The middle portion of the cover plate is circular, and the protrusions and protrusion grooves are both semicircular.

[0009] Each of the target position holes is opened along the thickness direction of the target sleeve, and the height of each of the target position holes is greater than the height of the small target of the standard material.

[0010] Each of the target holes is opened near the outer edge of the target sleeve.

[0011] The axial centerline of each target hole is collinear with the axial centerline of the through hole opened at the top and the axial centerline of the cover plate hole opened at the bottom, and is parallel to the axial centerline of the target sleeve.

[0012] The number of the target holes is four to six.

[0013] The advantages and positive effects of this utility model are:

[0014] The utility model is easy to operate. The standard material target can be replaced by rotating the cover and taking out the spring. It is used to flexibly use different types of standard materials for different types of samples during laser in-situ micro-area analysis, improves the utilization efficiency of the limited space in the sample chamber, and reduces the waste of precious standard materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the internal structure of a target site;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the target sleeve of the utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the small target of the standard substance of the utility model;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the spring of the utility model;

[0020] Figure 6 This is a schematic diagram of the three-dimensional structure of the cover plate of the utility model;

[0021] Figure 7 This is a bottom perspective view of the target sleeve of the present invention;

[0022] Figure 8 This is a top perspective view of the target sleeve of the utility model;

[0023] Among them: 1 is the target sleeve, 2 is the target position hole, 3 is the spring, 4 is the small target of the standard material, 5 is the cover plate, 6 is the cover plate hole, 7 is the convex block, 8 is the through hole, and 9 is the convex block groove. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 8 As shown, the utility model includes a target sleeve 1, a spring 3, a small target of a standard material 4 and a cover plate 5. A plurality of target holes 2 are uniformly opened on the target sleeve 1 along the circumferential direction, and each target hole 2 is opened along the thickness direction of the target sleeve 1. The top surface of the target sleeve 1 is opened with through holes 8, which are the same number and one-to-one corresponding to the target holes 2. The bottom surface of the target sleeve 1 is opened with cover plate holes 6, which are the same number and one-to-one corresponding to the target holes 2. Each target hole 2 is respectively connected to the corresponding through hole 8 and cover plate hole 6. The diameter of the through hole 8 is smaller than the diameter of the target hole 2, so that the standard material can be exposed for laser ablation analysis and can ensure that the surface of the standard material is flat and remains stable during analysis; the cover plate 5 is placed into the target hole 2 connected to each cover plate hole 6. Each target hole 2 accommodates a small target 4 of standard material. The height of the target hole 2 is greater than the height of the small target 4 of standard material. A spring 3 is provided at the bottom of each small target 4 of standard material. The two ends of the spring 3 are respectively in contact with the small target 4 of standard material and the cover plate 5, thereby fixing the small target 4 of standard material.

[0026] The target sleeve 1 of this embodiment is cylindrical and made of polytetrafluoroethylene, which will not introduce pollution and will not leave any aerosol particles caused by the erosion of the sample.

[0027] The number of target holes 2 is four to six. In this embodiment, the target sleeve 1 is evenly distributed along the circumference, with five target holes 2 corresponding to five replaceable target positions, namely, the first target position B1, the second target position B2, the third target position B3, the fourth target position B4, and the fifth target position B5. Five different standard material targets 4 can be placed according to the needs of analysis and testing. Each target hole 2 can accommodate a standard material target 4 (i.e., the first standard material target C1 is placed in the first target position B1, the first standard material target C2 is placed in the second target position B2, the third standard material target C3 is placed in the third target position B3, the fourth standard material target C4 is placed in the fourth target position B4, and the fifth standard material target C5 is placed in the fifth target position B5). This allows the standard material to be visualized within the laser ablation range. In this embodiment, each target hole 2 is located near the outer edge of the target sleeve 1. The axial centerline of each target hole 2 is collinear with the axial centerline of the through hole 8 opened at the top and the axial centerline of the cover plate hole 6 opened at the bottom, and is parallel to the axial centerline of the target sleeve 1.

[0028] In this embodiment, the outer edge of the cover plate 5 is provided with a radially outward projection 7. The cover plate hole 6, defined in the bottom surface of the target sleeve 1, has the same shape as the projection 7 and includes a projection groove 9 corresponding to the projection 7. The central portion of the cover plate 5 is circular, and both the projection 7 and the projection groove 9 are semicircular. When the cover plate 5 is placed through the cover plate hole 6 into the target hole 2, the projection 7 passes through the projection groove 9. Then, when the cover plate 5 is rotated, the projection 7 on the cover plate 5 abuts against the bottom surface of the target hole 2, thereby limiting the position of the cover plate 5.

[0029] like Figure 4 As shown, the small target 4 of the standard substance in this embodiment is cylindrical, with a diameter of 8 mm and a height of 10 mm, which is easy to manufacture and does not need to be considered for combination with other standard substances.

[0030] like Figure 5 As shown, the diameter of the spring 3 in this embodiment is 7 mm.

[0031] like Figure 6 As shown, the middle part of the cover plate 5 of this embodiment is circular, and two semicircular protrusions 7 are symmetrically provided on the edge of the circle. The line between the centers of the two protrusions 7 passes through the center of the circle in the middle of the cover plate 5. The length between the outermost edges of the two protrusions 7 is 8.5 mm, and the diameter of the middle circle is 7.5 mm.

[0032] like Figure 7 As shown, the outer diameter of the cover plate hole 6 in this embodiment is 9 mm (corresponding to the length between the outermost edges of the two protrusions 7 on the cover plate 5), and the inner diameter is 8 mm (corresponding to the central circle of the cover plate 5).

[0033] like Figure 8 As shown, in this embodiment, the diameter of the target hole 2 is 9 mm, and the diameter of the through hole 8 is 6 mm.

[0034] During installation, place the small target 4 of the standard material in the target sleeve 1 of polytetrafluoroethylene, put the spring 3 into the target hole 2 through the cover hole 6, and then put the cover 5 into the target sleeve 1 through the cover hole 6. Rotate the cover 5 so that the protrusion 7 leaves the protrusion groove 9 and abuts against the bottom surface of the target hole 2, so that the small target 4 of the standard material is fixed to ensure that the surface of the standard material is flat and that there is no positional displacement during the laser ablation process, thereby keeping the position of the standard sample stable.

[0035] If a newly obtained standard material is used to make a target separately, it wastes space, and if it is combined with other standard materials to make a new target, it wastes time. During laser micro-area in-situ analysis, the consumption of different standard materials is different. Taking Nist610, zircon standard 91500, and GJ-1G as examples, in zircon dating analysis, 91500 is eroded twenty times more times than GJ-1G. Usually, when 91500 needs to be re-polished, GJ-G can still be used. Polishing them together causes unnecessary consumption of precious standard materials. The utility model can make standard materials into standard material small targets 4 with a diameter of 8mm. The target sleeve 1 can install five standard material small targets 4 at the same time. The cover plate 5 and the spring 3 are used to fix them to ensure that the surface of the standard material small targets 4 is flat and can be replaced at any time, thereby reducing the space occupied in the sample compartment, reducing the number of sample changes, and reducing the loss of standard samples.

[0036] When the standard material needs to be replaced, the cover plate 5 is rotated until the protrusion 7 corresponds to the protrusion groove 9, and the cover plate 5 is removed and the spring 3 is taken out, so that the standard material small target 4 can be replaced simply and quickly.

Claims

1. A replaceable standard material target, characterized in that: The invention comprises a target sleeve (1), a spring (3), a small target of a standard substance (4) and a cover plate (5), wherein a plurality of target position holes (2) are uniformly opened on the target sleeve (1) along the circumferential direction, the top surface of the target sleeve (1) is provided with through holes (8) which are the same in number and correspond one to one with the target position holes (2), the bottom surface of the target sleeve (1) is provided with cover plate holes (6) which are the same in number and correspond one to one with the target position holes (2), and each target position hole (2) is respectively connected to the corresponding through hole (8), cover plate hole (6) and the corresponding through hole (8). ) are connected, the diameter of the through hole (8) is smaller than the diameter of the target hole (2), and a cover plate (5) is placed into the connected target hole (2) from each cover plate hole (6); each target hole (2) contains a small standard material target (4), and a spring (3) is provided at the bottom of each small standard material target (4), and the two ends of the spring (3) are respectively in contact with the small standard material target (4) and the cover plate (5), thereby fixing the small standard material target (4).

2. The replaceable standard material target according to claim 1, characterized in that: The outer edge of the cover plate (5) is provided with a protrusion (7) radially outwardly; the shape of the cover plate hole (6) opened on the bottom surface of the target sleeve (1) is the same as the shape of the protrusion (7); the cover plate hole (6) has a protrusion groove (9) corresponding to the protrusion (7); when the cover plate (5) is placed into the target hole (2) through the cover plate hole (6), the protrusion (7) passes through the protrusion groove (9); then, when the cover plate (5) is rotated, the protrusion (7) on the cover plate (5) abuts against the bottom surface of the target hole (2), thereby realizing the position limiting of the cover plate (5).

3. The replaceable standard material target according to claim 2, characterized in that: The middle portion of the cover plate (5) is circular, and the protrusion (7) and the protrusion groove (9) are both semicircular.

4. The replaceable standard material target according to claim 1, characterized in that: Each of the target position holes (2) is opened along the thickness direction of the target sleeve (1), and the height of each of the target position holes (2) is greater than the height of the standard material small target (4).

5. The replaceable standard material target according to claim 1, characterized in that: Each target hole (2) is opened near the outer edge of the target sleeve (1).

6. The replaceable standard material target according to claim 1, characterized in that: The axial centerline of each target hole (2) is collinear with the axial centerline of the through hole (8) opened at the top and the axial centerline of the cover plate hole (6) opened at the bottom, and is parallel to the axial centerline of the target sleeve (1).

7. The replaceable standard material target according to claim 1, characterized in that: The number of the target holes (2) is four to six.

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