Adjustable slit device for spectrum detection

Abstract

The utility model belongs to the field of spectrum detection, and particularly discloses an adjustable slit device for spectrum detection, which comprises a shell and two slit blocks parallel to each other, the shell is provided with a light inlet, the two slit blocks are slidably connected to the shell, the sliding directions of the two slit blocks are located on the same straight line, and the light inlet is provided with a light outlet. The two slit blocks are close to each other or far away from each other so as to change the opening size of the light inlet; the device further comprises a rotary adjusting piece connected to the shell, and the two slit blocks can be driven to be far away from each other by rotating the rotary adjusting piece. According to the invention, the rotation of the rotation adjusting member facilitates the adjustment of the distance between the two slit blocks, and the distance between the two slit blocks after adjustment is uniform, thereby guaranteeing the accuracy of a detection result.

Description

Technical Field

[0001] The present application belongs to the field of spectral detection, and more specifically, relates to an adjustable slit device for spectral detection. Background Art

[0002] Emission spectroscopy uses an alternating current arc to generate high temperature, which excites powdered solid samples to emit a characteristic spectrum. The spectrum is focused by the first and second lenses, and after stray light is filtered out, the spectrum is irradiated onto a plane mirror after being controlled by a slit device. It is then reflected onto a concave mirror, and the spectral bands generated by the sample are dispersed into corresponding characteristic spectral lines of different elements through a spectroscopic grating.

[0003] Chinese utility model application number 201520235385.X discloses a spectrograph with a holographic high-density grating, including a light-shielding device for limiting the luminous flux of incident light. The light-shielding device comprises two light-shielding plates, connected at both ends by an adjustment screw. The adjustment screw is used to fine-tune the spacing of the slits between the two light-shielding plates, thereby changing the luminous flux of incident light. Adjustment requires simultaneous rotation of both adjustment screws to move the two light-shielding plates away from or closer to each other, thereby adjusting the spacing of the slits between the two light-shielding plates. This adjustment method is relatively inconvenient, and after adjustment, the spacing of the slits between the two light-shielding plates is uneven, affecting the spectral detection results. Utility Model Content

[0004] In response to the defects of the prior art, the present application provides an adjustable slit device for spectral detection, aiming to solve the problem that the existing slit device is inconvenient to adjust and easily affects the detection results.

[0005] The present application provides an adjustable slit device for spectral detection, which specifically includes a shell and two parallel slit blocks. The shell is provided with a light inlet. The two slit blocks are slidably connected to the shell and the sliding directions are on the same straight line. The two slit blocks move closer to or away from each other to change the opening size of the light inlet; the device also includes a rotating adjustment member connected to the shell, and rotating the rotating adjustment member can drive the two slit blocks away from each other.

[0006] The above technical solution conceived by the present application, compared with the existing technology, is to change the opening size of the light inlet by adjusting the spacing between the two slit blocks, thereby adjusting the luminous flux of the light to be detected after passing through the light inlet. The rotation of the rotating adjustment member can drive the two slit blocks away from each other, thereby increasing the spacing between the two slit blocks. The adjustment is simple and convenient, and the two slit blocks move at the same time, so that the spacing is uniform, ensuring accurate detection results.

[0007] As a further preferred embodiment, the device drives the two slit blocks to approach each other through an elastic member, and the elastic member is fixedly connected to the housing and located between the two slit blocks.

[0008] By adopting the above technical solution, the two slit blocks can be automatically reset under the action of the elastic member, so that the distance between the two slit blocks can be adjusted again as needed.

[0009] As a further preference, the elastic member includes two tension springs, and the two tension springs are symmetrically arranged at both ends of the slit block.

[0010] By adopting the above technical solution, the two tension springs can pull the two ends of the two slit blocks at the same time, so that the movement of the slit blocks is more stable when they are reset.

[0011] As a further preferred embodiment, a groove is provided on one side of the housing, the light inlet is connected to the groove, and the two slit blocks are both arranged in the groove.

[0012] By adopting the above technical solution, the slit block is arranged inside the groove, and when the shell is installed, interference with the movement of the slit block is avoided.

[0013] As a further preference, a slide rail slidably adapted to the slit block is provided on the inner wall of the groove.

[0014] By adopting the above technical solution, the slit blocks slide in the slide rails, thereby improving the stability of the slit blocks and ensuring that the spacing between the two slit blocks is uniform.

[0015] As a further preferred embodiment, the rotary adjustment member is a threaded push rod, which is threadedly connected to the housing and has one end extending into the groove. When the threaded push rod is rotated, its end extends between the two slit blocks to increase the slit spacing.

[0016] By adopting the above technical solution, the threaded push rod is rotated to extend between the two slit blocks, pushing the two slit blocks to move to both sides respectively, thereby increasing the distance between the two slit blocks.

[0017] As a further preference, the diameter of one end of the threaded push rod located in the groove is gradually changed from small to large in the direction away from the slit block.

[0018] By adopting the above technical solution, as the threaded push rod rotates and the inserted portion becomes deeper, the distance between the two slit blocks gradually increases, so that the distance can be adjusted to a suitable distance according to actual needs.

[0019] As a further preferred embodiment, a connecting block is fixedly connected to each of the two slit blocks, and a gap is left between the two connecting blocks for the threaded push rod to be inserted.

[0020] By adopting the above technical solution, the threaded push rod is inserted into the gap between the two connecting blocks after being moved, thereby pushing the two connecting blocks to move, making adjustment more convenient.

[0021] As a further preferred embodiment, the rotary adjustment member is a bidirectional threaded rod, which is rotatably connected to the shell and passes through the groove. The bidirectional threaded rod passes through the two slit blocks and is threadedly connected to the two slit blocks. Rotating the bidirectional threaded rod can make the two slit blocks move closer to or farther away from each other.

[0022] By adopting the above technical solution, the two slit blocks can be moved away from each other by rotating the bidirectional threaded rod, thereby adjusting the distance between the two slit blocks, and the adjustment is simple and convenient.

[0023] As a further preferred embodiment, scale markings are arranged around the outer peripheral wall of the bidirectional threaded rod.

[0024] By adopting the above technical solution, the rotation angle of the bidirectional threaded rod can be intuitively seen according to the scale marking, so that the moving distance of the two slit blocks can be determined, which is convenient for precise adjustment.

[0025] In general, the above technical solutions conceived by this application have the following technical advantages compared with the existing technologies:

[0026] 1. When this application is used, the shell is installed on the light propagation path, and the light is detected after passing through the light inlet. The spacing between the two slit blocks is adjusted by rotating the adjusting member to change the opening size of the light inlet, thereby adjusting the luminous flux of the light to be detected. Specifically, the rotating adjusting member is rotated to drive the two slit blocks away from each other, increasing the spacing between the two slit blocks, thereby increasing the luminous flux. This structure is simple and convenient to adjust, and the two slit blocks move at the same time, so that the spacing is uniform, ensuring accurate detection results.

[0027] 2. After the two slit blocks of the present application move away from each other, two tension springs can simultaneously pull both ends of the two slit blocks, so that the two slit blocks are automatically reset, so that the distance between the two slit blocks can be adjusted again as needed.

[0028] 3. The present application can move the two slit blocks closer to or farther away from each other by rotating the bidirectional threaded rod, thereby adjusting the distance between the two slit blocks. The adjustment is simple and convenient, and the structure is simple, which reduces the manufacturing cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the front view structure of the adjustable slit device provided in Example 1;

[0030] Figure 2 is a schematic diagram of the overall structure of the slit block and the rotary adjustment member provided in Example 1;

[0031] Figure 3 is a schematic diagram of the cross-sectional structure of the slit block provided in Example 1;

[0032] Figure 4 This is a schematic diagram of the overall structure of the slit block and the rotary adjustment member provided in Example 2.

[0033] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0034] 1. Housing; 11. Light inlet; 12. Groove; 13. Slide rail; 2. Slit block; 21. Connecting block; 3. Rotary adjustment member; 4. Elastic member; 41. Tension spring; 5. Scale mark. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0036] Example 1:

[0037] Reference Figure 1-3 , the present application discloses an adjustable slit device for spectral detection, including a shell 1 and two parallel slit blocks 2, the two slit blocks 2 are slidably connected to the shell 1 and the sliding directions are on the same straight line, a light inlet 11 is provided in the middle of the shell 1, the two slit blocks 2 are moved closer to or farther away from each other to change the opening size of the light inlet 11, specifically, a groove 12 is provided on one side of the shell 1, the light inlet 11 is connected to the groove 12, the two slit blocks 2 are slidably connected to the groove 12, and a slide rail 13 that is slidably adapted to the slit blocks 2 is provided on the inner wall of the bottom end of the groove 12, the two slit blocks 2 slide closer to or farther away from each other to adjust the spacing, and the light passes through the light inlet 11 and the spacing to change the luminous flux.

[0038] Furthermore, the device also includes a rotary adjustment member 3, which is connected to the housing 1 and rotates to drive the two slit blocks 2 away from each other. In this embodiment, the rotary adjustment member 3 is a threaded rod, which is threadedly connected to the housing 1 and has one end extending into the groove 12. The diameter of the end of the threaded rod located in the groove 12 is gradually arranged from small to large in the direction away from the slit block 2. When the threaded rod is rotated, its end can be extended between the two slit blocks 2, thereby increasing the distance between the two slit blocks 2. As the threaded rod is inserted deeper after rotation, the distance between the two slit blocks 2 gradually increases, so that the distance can be adjusted to the appropriate distance according to actual needs. At the same time, to facilitate the threaded rod to extend between the two slit blocks 2, a cylindrical connecting block 21 is fixedly connected to each of the two slit blocks 2, and a gap is left between the outer walls of the two connecting blocks 21 for the threaded rod to be inserted.

[0039] Furthermore, the device also includes an elastic member 4, which drives the two slit blocks 2 to approach each other. The elastic member 4 is fixedly connected to the shell 1 and is located between the two slit blocks 2. Specifically, the elastic member 4 includes two tension springs 41, and the two tension springs 41 are symmetrically arranged at both ends of the slit block 2. The middle part of the tension spring 41 is fixedly connected to the shell 1. The threaded push rod extends between the two slit blocks 2 to stretch the tension spring 41. After the threaded push rod is reversed and exited, the tension spring 41 pulls the two slit blocks 2 to reset, so that they can be adjusted again when used again.

[0040] Example 2:

[0041] Reference Figure 4 The difference between this embodiment and embodiment 1 is that the rotary adjustment member 3 is a bidirectional threaded rod, which is rotatably connected to the shell 1 and penetrates a groove 12. The bidirectional threaded rod penetrates two slit blocks 2, and the two slit blocks 2 are respectively threadedly connected to the bidirectional threads on the bidirectional threaded rod. Rotating the bidirectional threaded rod can make the two slit blocks 2 move away from each other, and reversing the bidirectional threaded rod can make the two slit blocks 2 move closer to each other. A scale mark 5 is arranged around the outer peripheral wall of the bidirectional threaded rod outside the groove 12. The rotation angle of the bidirectional threaded rod can be intuitively seen according to the scale mark 5, so that the moving distance of the two slit blocks 2 can be determined, which is convenient for precise adjustment.

[0042] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0043] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0045] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An adjustable slit device for spectral detection, characterized in that: The device comprises a housing (1) and two mutually parallel slit blocks (2), wherein the housing (1) is provided with a light inlet (11), the two slit blocks (2) are both slidably connected to the housing (1) and the sliding directions are located on the same straight line, and the two slit blocks (2) move closer to or farther away from each other to change the opening size of the light inlet (11); the device also comprises a rotating adjustment member (3) connected to the housing (1), and rotating the rotating adjustment member (3) can drive the two slit blocks (2) to move away from each other; A groove (12) is provided on one side of the housing (1), the light inlet (11) is in communication with the groove (12), and the two slit blocks (2) are both disposed in the groove (12); The rotary adjustment member (3) is a threaded push rod, which is threadedly connected to the housing (1) and has one end extending into the groove (12). When the threaded push rod is rotated, its end extends between the two slit blocks (2) to increase the slit spacing.

2. The adjustable slit device for spectrum detection according to claim 1, characterized in that: The device drives the two slit blocks (2) to approach each other via an elastic member (4); the elastic member (4) is fixedly connected to the housing (1) and is located between the two slit blocks (2).

3. The adjustable slit device for spectrum detection according to claim 2, characterized in that: The elastic member (4) comprises two tension springs (41), and the two tension springs (41) are symmetrically arranged at both ends of the slit block (2).

4. The adjustable slit device for spectrum detection according to claim 1, characterized in that: A slide rail (13) is provided on the inner wall of the groove (12) and is adapted to slide with the slit block (2).

5. The adjustable slit device for spectrum detection according to claim 1, characterized in that: The diameter of one end of the threaded push rod located in the groove (12) is gradually changed from small to large in a direction away from the slit block (2).

6. The adjustable slit device for spectrum detection according to claim 1, characterized in that: The two slit blocks (2) are both fixedly connected with a connecting block (21), and a gap for the threaded push rod to be inserted is left between the two connecting blocks (21).

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