A spectrometer adjustable optical slit

Abstract

The application belongs to the technical field of optical device manufacturing, and particularly relates to an adjustable optical slit of a spectrometer, which comprises a bottom plate, the upper surface of the bottom plate is provided with a first sliding rail, a vertical plate is slidably arranged between the two ends of the first sliding rail, the vertical plate is perpendicular to the length line of the first sliding rail, a second sliding rail is arranged on the vertical plate, the second sliding rail is perpendicular to the first sliding rail, the second sliding rail and the first sliding rail are both parallel to the upper surface of the bottom plate, a mounting seat is slidably arranged between the two ends of the second sliding rail, a row of slits is arranged above the second sliding rail on the mounting seat, the formation of the slits is parallel to the second sliding rail, a first linear movement driving device is arranged on the bottom plate, the first linear movement driving device drives the vertical plate to move on the first sliding rail, a second linear movement driving device is arranged on the vertical plate, and the second linear movement driving device drives the mounting seat to move on the second sliding rail; the problem that the current optical slit cannot adjust different sizes of slits according to needs to balance resolution and sensitivity is solved.

Description

Technical Field

[0001] This application belongs to the field of optical device manufacturing technology, specifically an adjustable optical slit for a spectrometer. Background Technology

[0002] Optical slits are key components in optical systems, primarily controlling light propagation by limiting the width or shape of the beam. In spectrometers, the slit (usually the entrance slit) determines the light flux and spectral resolution entering the system. Narrow slits improve resolution but reduce light intensity; wide slits have the opposite effect. In conjunction with gratings or prisms, slits can separate light of specific wavelengths, achieving monochromatic light output. Currently, most optical systems employ fixed slit designs, making it impossible to simultaneously achieve high resolution and high sensitivity. This limits the effective performance of the optical instrument; some samples require high resolution, while others require high sensitivity, necessitating a compromise between the two. Utility Model Content

[0003] The purpose of this application is to address the shortcomings of existing technologies by employing a first linear motion drive device to drive the vertical plate and a second linear motion drive device to drive the mounting base. This design provides an adjustable optical slit for a spectrometer, capable of switching the size of the slit, thus solving the problem that current optical slits cannot be adjusted to different sizes to balance resolution and sensitivity as needed.

[0004] The above-mentioned technical objective of this application is achieved through the following technical solution: An adjustable optical slit for a spectrometer includes a base plate. A first slide rail is provided on the upper surface of the base plate. A vertical plate is slidably disposed between the two ends of the first slide rail, perpendicular to the length line of the first slide rail. A second slide rail is disposed on the vertical plate, perpendicular to the first slide rail. Both the second and first slide rails are parallel to the upper surface of the base plate. A mounting base is slidably disposed between the two ends of the second slide rail. A row of slits is provided on the mounting base above the second slide rail. At least one of the slits is capable of being penetrated by light L, which is parallel to the base plate. The two ends of the projection of light L onto the plane of the base plate are located outside the base plate. The formation of the slits is parallel to the second slide rail. A first linear motion drive device is provided on the base plate, driving the vertical plate to move on the first slide rail. A second linear motion drive device is provided on the vertical plate, driving the mounting base to move on the second slide rail.

[0005] Preferably, a first slider is slidably connected between the two ends of the first slide rail, and the upright plate is disposed on the first slider.

[0006] Preferably, the upright plate is provided with a through hole, the inner diameter of the through hole is greater than the length of the slit, the diameter of the through hole is less than the distance between any two adjacent slits, and the axis of the through hole intersects the length line of the formation formed by the slits.

[0007] Preferably, the first linear motion drive device is a first lead screw motor, which is fixedly mounted on the base plate. The lead screw of the first lead screw motor is parallel to the first slide rail, and one end of the lead screw of the first lead screw motor is rotatably connected to the vertical plate.

[0008] Preferably, the second linear motion drive device is a second lead screw motor, which is fixedly mounted on the vertical plate. The lead screw of the second lead screw motor is parallel to the second slide rail, and one end of the lead screw of the second lead screw motor is rotatably connected to the mounting base.

[0009] Preferably, the distance from the top of the upright plate to the bottom plate is less than the distance from the formation formed by the slit to the bottom plate.

[0010] The beneficial effects of this application are: This application employs a first linear motion drive device to drive the vertical plate and a second linear motion drive device to drive the mounting base, designing an adjustable optical slit for a spectrometer. This allows for switching the size of the slit, solving the problem that current optical slits cannot be adjusted to different sizes to balance resolution and sensitivity. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the first embodiment in this application; Figure 2 This is a schematic diagram of the structure of the second embodiment in this application.

[0012] The components are: 1. base plate; 2. first slide rail; 3. upright plate; 4. second slide rail; 5. mounting base; 6. slit; 7. first slider; 8. through hole; 9. first lead screw motor; 10. second lead screw motor. Detailed Implementation

[0013] like Figure 1-2As shown, an adjustable optical slit for a spectrometer includes a base plate 1. A first slide rail 2 is provided on the upper surface of the base plate 1. A vertical plate 3 is slidably disposed between the two ends of the first slide rail 2, and the vertical plate 3 is perpendicular to the length line of the first slide rail 2. A second slide rail 4 is disposed on the vertical plate 3, and the second slide rail 4 is perpendicular to the first slide rail 2. Both the second slide rail 4 and the first slide rail 2 are parallel to the upper surface of the base plate 1. A mounting base 5 is slidably disposed between the two ends of the second slide rail 4. A row of slits 6 is provided on the mounting base 5 above the second slide rail 4. At least one of the slits 6 can be penetrated by light L, which is parallel to the base plate 1. The two ends of the projection of the light L onto the plane of the base plate 1 are located outside the base plate 1. The formation of the slits 6 is parallel to the second slide rail 4. A first linear motion drive device is provided on the base plate 1, which drives the vertical plate 3 to move on the first slide rail. A second linear motion drive device is provided on the vertical plate 3, which drives the mounting base 5 to move on the second slide rail.

[0014] In this embodiment, during use, the light source is placed on one side of the upright plate 3, ensuring that the light emitted by the light source is perpendicular to the formation formed by the slits 6 and intersects at a point. The light then passes through the slits 6. When the distance between the slits 6 and the light source needs to be changed, the upright plate 3 is moved by a first linear motion drive device. When the size of the slits 6 needs to be changed, the mounting base 5 is moved on the second slide rail by a second linear motion drive device to switch between different slit sizes. The width of the slits 6 can be set to five specifications: 20µm, 30µm, 40µm, 50µm, and 60µm, to meet the measurement requirements of samples in different industries. The adjustable slits 6 directly determine the spectral resolution (narrower slits improve resolution but reduce light flux), and users can flexibly adjust them according to sample characteristics (such as narrow or wide peaks). This greatly increases the applicability of the spectrometer in different industries. The setting that "at least one of the slits 6 can be penetrated by light L, light L is parallel to the base plate 1, and the two ends of the projection of light L on the plane where the base plate 1 is located are outside the base plate 1" means that light L can penetrate at least one slit 6, that is, the light source can enter a slit 6 without being blocked.

[0015] As a preferred embodiment, a first slider 7 is slidably connected between the two ends of the first slide rail 2, and the upright plate 3 is disposed on the first slider 7. This arrangement of the first slider 7 facilitates the installation of the upright plate 3 on the first slide rail 2.

[0016] As a preferred embodiment, the upright plate 3 is provided with a through hole 8. The inner diameter of the through hole 8 is larger than the length of the slit 6, and the diameter of the through hole 8 is smaller than the distance between any two adjacent slits 6. The axis of the through hole 8 intersects the length line of the formation formed by the slits 6. The purpose of this arrangement is to ensure that light passing through the through hole 8 can only correspond to one slit 6, avoiding the situation where the through hole 8 can correspond to two slits 6, thereby preventing the failure of the selective switching slit 6. In use, the light emitted by the light source can simply be passed through the through hole 8.

[0017] As a preferred embodiment, the first linear motion drive device is a first lead screw motor 9, which is fixedly mounted on the base plate 1. The lead screw of the first lead screw motor 9 is parallel to the first slide rail 2, and one end of the lead screw of the first lead screw motor 9 is rotatably connected to the upright plate 3. With this configuration, the upright plate 3 can be moved by driving the first lead screw motor 9, and the upright plate 3 is fixedly connected to the first slider 7.

[0018] In a preferred embodiment, the second linear motion drive device is a second lead screw motor 10, which is fixedly mounted on the upright plate 3. The lead screw of the second lead screw motor 10 is parallel to the second slide rail 4, and one end of the lead screw of the second lead screw motor 10 is rotatably connected to the mounting base 5. With this configuration, the second lead screw motor 10 drives the mounting base 5 to slide on the second slide rail 4, thereby switching between different slits 6.

[0019] Another implementation, such as Figure 2 As shown, the distance from the top of the upright plate 3 to the base plate 1 is less than the distance from the formation formed by the slits 6 to the base plate 1. This arrangement eliminates the need for through holes 8, preventing the upper end of the upright plate 3 from blocking the slits 6 and preventing light from entering them. With this method of eliminating through holes 8, only the position of the light source needs to be determined during use; switching the slits 6 is not affected.

Claims

1. An adjustable optical slit for a spectrometer, characterized in that: The system includes a base plate (1), on the upper surface of which a first slide rail (2) is provided. A vertical plate (3) is slidably disposed between the two ends of the first slide rail (2). The vertical plate (3) is perpendicular to the length line of the first slide rail (2). A second slide rail (4) is disposed on the vertical plate (3). The second slide rail (4) is perpendicular to the first slide rail (2). Both the second slide rail (4) and the first slide rail (2) are parallel to the upper surface of the base plate (1). A mounting base (5) is slidably disposed between the two ends of the second slide rail (4). A row of narrow... At least one of the slits (6) can be penetrated by light L, the light L is parallel to the base plate (1), the two ends of the projection of the light L on the plane where the base plate (1) is located are outside the base plate (1), the formation of the slits (6) is parallel to the second slide rail (4), the base plate (1) is provided with a first linear motion drive device, the first linear motion drive device drives the upright plate (3) to move on the first slide rail, the upright plate (3) is provided with a second linear motion drive device, the second linear motion drive device drives the mounting base (5) to move on the second slide rail.

2. The adjustable optical slit for a spectrometer according to claim 1, characterized in that: The first slider (7) is slidably connected between the two ends of the first slide rail (2), and the vertical plate (3) is provided on the first slider (7).

3. The adjustable optical slit for a spectrometer according to claim 1, characterized in that: The upright plate (3) is provided with a through hole (8), the inner diameter of the through hole (8) is greater than the length of the slit (6), the diameter of the through hole (8) is less than the distance between any two adjacent slits (6), and the axis of the through hole (8) intersects the length line of the formation formed by the slits (6).

4. The adjustable optical slit for a spectrometer according to claim 3, characterized in that: The first linear motion drive device is a first lead screw motor (9), which is fixed on the base plate (1). The lead screw of the first lead screw motor (9) is parallel to the first slide rail (2), and one end of the lead screw of the first lead screw motor (9) is rotatably connected to the vertical plate (3).

5. The adjustable optical slit for a spectrometer according to claim 4, characterized in that: The second linear motion drive device is a second lead screw motor (10). The second lead screw motor (10) is fixed on the vertical plate (3). The lead screw of the second lead screw motor (10) is parallel to the second slide rail (4). One end of the lead screw of the second lead screw motor (10) is rotatably connected to the mounting base (5).

6. The adjustable optical slit of a spectrometer according to claim 1, characterized in that: The distance from the top of the upright plate (3) to the bottom plate (1) is less than the distance from the formation formed by the slit (6) to the bottom plate (1).

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