Spliced multispectral combination filter with high-precision positioning

Abstract

The application relates to the technical field of optical detection, and discloses a high-precision positioning spliced multispectral combination filter, which comprises a spliced substrate, an outer frame is arranged above the spliced substrate, a plurality of partitions are arranged in the outer frame, a stepped plate is arranged on the opposite side walls of the partitions, a plurality of connecting plates are arranged above the stepped plates, and a filter is arranged in each of the connecting plates; a magnetic stripe and a positioning hole are arranged on the upper surface of the stepped plate, a positioning block is arranged at the bottom of the connecting plate, the positioning block is inserted into the positioning hole, and the bottom of the connecting plate is magnetically connected with the magnetic stripe; a positioning hole is arranged through the corner position of the spliced substrate, and the horizontal profile area of the spliced substrate is larger than that of the outer frame. The filter is fixed without glue and high-precision positioning is realized through the cooperation of the mechanical insertion and magnetic adsorption, so that the later disassembly and maintenance are facilitated.

Description

Technical Field

[0001] This application relates to the field of optical detection technology, specifically a high-precision positioning spliced ​​multispectral combined filter. Background Technology

[0002] Multispectral optical inspection systems require the assembly of multiple filters across different wavelengths to achieve simultaneous acquisition of signals from various spectra. The accuracy of optical inspection largely depends on the positional precision of the assembled filters and the effectiveness of optical path isolation within the components.

[0003] Existing modular multispectral filters use a rigid connection method, such as adhesive curing or clamping plates and bolts, to assemble and fix the individual internal filters. The outer metal frame and the internal glass filter have different coefficients of thermal expansion. When the ambient temperature changes, the metal frame can easily transmit mechanical stress to the edge of the filter, increasing the risk of the filter breaking under pressure. In addition, when a filter of a specific wavelength band inside the assembly is damaged and needs to be replaced individually, the traditional rigid fixing structure makes the disassembly process very cumbersome. When maintenance personnel use tools to forcibly pry and disassemble the filter from the gap at the lens joint, uneven local stress can cause damage to adjacent intact filters or the outer frame.

[0004] Furthermore, in practical applications where multiple filters are spliced ​​together, assembly gaps inevitably exist at the joints between adjacent filters and the frame. Existing combined filter structures lack physical shielding designs for internal seams. When external light beams illuminate the seam, some light undergoes edge refraction or scattering, penetrating through the gaps into the detection system or deflecting into the working areas of adjacent wavelength filters. Crosstalk between different spectra and stray light from non-working areas directly interfere with the reception of light signals by the back-end optical sensor, resulting in inaccurate detection data output by the multispectral detection equipment. Therefore, this application proposes a high-precision positioning spliced ​​multispectral combined filter to address the shortcomings of existing technologies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a high-precision positioning spliced ​​multispectral combined filter, which solves the problems of existing combined filters being easily broken by mechanical stress due to rigid fixing and not being convenient for individual disassembly and maintenance, as well as the lack of shielding design at the filter assembly gaps, resulting in light crosstalk and stray light affecting the accuracy of detection data.

[0006] To achieve the above objectives, this application provides the following technical solution: a high-precision positioning spliced ​​multispectral combined filter, comprising a splicing substrate, an outer frame disposed above the splicing substrate, a plurality of partitions disposed inside the outer frame, stepped plates disposed on opposite sidewalls of the partitions, a plurality of connecting plates disposed above the stepped plates, and filters disposed inside the plurality of connecting plates. The stepped plate has a magnetic strip and a positioning hole on its upper surface, and a positioning block is provided at the bottom of the connecting plate. The positioning block is inserted into the positioning hole, and the bottom of the connecting plate is magnetically connected to the magnetic strip. This application achieves glue-free fixing and high-precision positioning of the filter by combining mechanical insertion and magnetic adsorption, which facilitates subsequent disassembly and maintenance.

[0007] Preferably, alignment holes are provided at the corners of the splicing substrate, and the horizontal outline area of ​​the splicing substrate is larger than that of the outer frame. The alignment holes facilitate precise coordinate alignment of the entire filter assembly with external optical equipment, and the larger substrate area provides a more stable base for mounting.

[0008] Preferably, the plurality of partitions are arranged in parallel inside the outer frame, with a slot space formed between two adjacent partitions to accommodate the connecting plate. By physically isolating filters of different wavelengths, spectral crosstalk between adjacent filters is prevented.

[0009] Preferably, the outer walls on both sides of the connecting plate are provided with stepped frame plates, the bottom surface of which is in contact with the upper surface of the stepped plate. The stepped, overlapping physical design not only provides stable longitudinal support but also blocks light from penetrating through the edge gaps, thus preventing light leakage.

[0010] Preferably, the connecting plate has a first through slot running vertically through its center, and the filter is embedded inside the first through slot of the connecting plate, with the outer edge of the filter fitting against the inner wall of the connecting plate. The first through slot ensures normal light transmission, and the embedded arrangement forms a solid enclosure around the filter, reducing the risk of glass edge breakage under stress.

[0011] Preferably, the bottom surface of the stepped plate has a through-hole extending upwards, and the upper opening of the through-hole extends to the position directly below the connecting plate. The positions of the through-hole and the positioning hole are offset from each other. When it is necessary to repair or replace a single filter, the repair personnel can use external tools to apply upward pushing force through the through-hole to overcome the magnetic force and achieve non-destructive disassembly of the filter.

[0012] Preferably, the outer frame has multiple pressure caps inside, and each pressure cap has a positioning plate on its sidewall. The positioning plate is slidably connected between two partitions, and the pressure cap is positioned directly above the connecting plate. The sliding pressure cap design facilitates quick closing and opening of the space above the outer frame, avoiding the cumbersome traditional screw fastening and improving assembly efficiency.

[0013] Preferably, the bottom surface of the pressure cap is provided with a relief groove, and a spring is provided inside the relief groove. The relief groove provides deformation space for the spring when it is compressed, which can accommodate the thermal expansion and contraction of the component due to temperature changes in the working environment.

[0014] Preferably, one end of the spring sheet is fixedly abutted against the inner wall of the clearance groove, and the other end of the spring sheet protrudes downward from the clearance groove and abuts against the top of the connecting plate. The downward elastic force applied by the spring sheet and the magnetic attraction at the bottom form a double fixation from top to bottom, clamping the filter tightly and enhancing the equipment's vibration resistance under complex working conditions.

[0015] Preferably, the pressure cap has a second through slot in the middle, which extends vertically through the filter. The size of the second through slot is the same as the size of the filter. The second through slot ensures that the effective light beam can enter the filter without obstruction, while the solid part of the pressure cap blocks the assembly edge of the filter, further reducing stray light interference with imaging.

[0016] This application provides a high-precision positioning spliced ​​multispectral combined filter. It has the following advantages: This application uses a positioning block insertion method combined with magnetic strip adsorption to position the connecting plate. The structure of the positioning block and magnetic strip reduces the use of glue or bolts to fix the parts, reduces the mechanical stress exerted on the filter by the surrounding structure, and helps to reduce the risk of the filter breaking when the ambient temperature changes. In addition, the magnetic adsorption and insertion combination design also provides maintenance personnel with the operating conditions to independently disassemble or replace the internal filter.

[0017] The partitions in this application divide the interior of the outer frame into multiple slot spaces. Combined with the structure of the stepped frame plates on the side walls of the connecting plate fitting together, a bent seam path is formed at the assembly gap. The bent seam blocks the straight propagation of light, and the solid structure of the partition blocks the light deflected at the edge, reducing the situation where light passes directly through the gap, reducing the crosstalk between different spectra, and helping to improve the accuracy of optical detection data.

[0018] This application features a spring sheet on the bottom surface of the pressure cap that abuts against the top of the connecting plate, and an ejector hole is provided through the bottom surface of the stepped plate. When the equipment is subjected to external vibration, the deformed spring sheet absorbs part of the vertical vibration energy, maintaining the stability of the assembly position of the connecting plate and the filter. When disassembling the filter, the ejector hole provides a bottom-up force channel for the tool, preventing maintenance personnel from forcibly prying the connecting plate from the gap above, thus reducing the possibility of filter damage due to uneven force during disassembly. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 This is a three-dimensional view of the high-precision positioning spliced ​​multispectral combined filter of this application; Figure 2 This is a schematic diagram of the internal structure of the outer frame of this application; Figure 3 This is a schematic diagram of the internal structure of the partition in this application; Figure 4 This is an exploded structural diagram of the stepped frame plate of this application; Figure 5 For this application Figure 3 A magnified schematic diagram of the structure at point A; Figure 6 This is a schematic diagram of the internal structure of the stepped plate in this application; Figure 7 This is a schematic diagram of the internal structure of the gland in this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Splicing substrate; 2. Alignment hole; 3. Outer frame; 4. Partition plate; 5. Magnetic strip; 6. Stepped plate; 7. Connecting plate; 8. Stepped frame plate; 9. Filter; 10. Positioning block; 11. Positioning hole; 12. Ejection hole; 13. Pressure cap; 14. Positioning plate; 15. Clearance groove; 16. Spring piece. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the article or device that includes said element.

[0023] The optional embodiments of this application are described in detail below with reference to the accompanying drawings.

[0024] Please see Figures 1-4 This application provides a high-precision positioning spliced ​​multispectral combined filter, including a splicing substrate 1, an outer frame 3 above the splicing substrate 1, a plurality of partitions 4 inside the outer frame 3, stepped plates 6 on opposite side walls of the partitions 4, a plurality of connecting plates 7 above the stepped plates 6, and filters 9 inside the plurality of connecting plates 7. The upper surface of the step plate 6 is provided with a magnetic strip 5 and a positioning hole 11. The bottom of the connecting plate 7 is provided with a positioning block 10, which is inserted into the positioning hole 11. The bottom of the connecting plate 7 is magnetically connected to the magnetic strip 5.

[0025] Specifically, when installing the connecting plate 7, the connecting plate 7 equipped with the filter 9 is placed between two adjacent partitions 4. The connecting plate 7 moves downward so that its bottom overlaps the upper surface of the stepped plate 6. During the process of the connecting plate 7 adhering to the stepped plate 6, the positioning block 10 at the bottom of the connecting plate 7 is inserted into the positioning hole 11 of the stepped plate 6. The outer wall of the positioning block 10 and the inner wall of the positioning hole 11 constrain each other, restricting the horizontal movement of the connecting plate 7. In order to achieve magnetic adsorption, the connecting plate 7 is made entirely of magnetically conductive metal, or a magnetic sheet is fixed at the bottom of the connecting plate 7 at the position corresponding to the magnetic strip 5. When the connecting plate 7 overlaps the step plate 6, the magnetic strip 5 on the surface of the step plate 6 generates a downward magnetic force on the bottom of the connecting plate 7. The magnetic force pulls the connecting plate 7 towards the step plate 6, completing the vertical positioning of the connecting plate 7 and the filter 9. The fixing method of using the positioning block 10 to insert and cooperate with the magnetic strip 5 reduces the use of glue or bolts to fix the parts, which helps to reduce the mechanical stress exerted on the filter 9 by the surrounding structure and helps to reduce the risk of the filter 9 breaking when the ambient temperature changes. In addition, the combination of magnetic attraction and insertion also provides conditions for subsequent maintenance personnel to independently disassemble or replace the internal filter 9.

[0026] Please see Figures 1-2 Alignment holes 2 are provided through the corners of the splicing substrate 1, and the horizontal outline area of ​​the splicing substrate 1 is larger than the horizontal outline area of ​​the outer frame 3.

[0027] Specifically, when assembling the multispectral composite filter into the external optical inspection system, the positioning post of the external optical inspection system passes through the alignment hole 2 at the corner of the splicing substrate 1. The sliding of the splicing substrate 1 is restricted by the insertion and cooperation of the external positioning post and the alignment hole 2, thereby determining the initial assembly position coordinates of the filter assembly. The horizontal contour area of ​​the splicing substrate 1 is larger than the horizontal contour area of ​​the outer frame 3, so that the splicing substrate 1 forms a ring of outwardly extending platform area on the outside of the outer frame 3. During handling or assembly operations, external objects usually preferentially touch the outwardly extending platform area of ​​the splicing substrate 1. This structure reduces the probability of external objects directly hitting the outer frame 3. At the same time, the outwardly extending platform area also provides a force-bearing support surface for external bolts or clamping mechanisms, which helps to increase the stability of the overall installation state.

[0028] Please see Figures 1-3 Multiple partitions 4 are arranged in parallel inside the outer frame 3, and a slot space is formed between two adjacent partitions 4 to accommodate the connecting plate 7.

[0029] Specifically, the interior of the outer frame 3 is divided into multiple long, narrow slot spaces by parallel-arranged partitions 4. Different slot spaces are used to place connecting plates 7 containing filters 9 of different wavelengths. To achieve the light-shielding function, the partitions 4 are made of opaque material, or a light-shielding coating is provided on the side wall surface of the partitions 4. The partitions 4 are located between adjacent connecting plates 7. When light passes through the filters 9, some light may be refracted or scattered at the edges. At this time, the partitions 4 block the deflected light and prevent the deflected light from entering the interior of adjacent slot spaces. The use of partitions 4 for physical isolation reduces the crosstalk phenomenon between different spectra. In addition, the slot spaces divide the internal structure, allowing operators to insert and remove connecting plates 7 individually for a specific slot space, providing operational space for the equipment to change filters 9 to meet different testing needs.

[0030] Please see Figures 3-5 The outer walls on both sides of the connecting plate 7 are provided with stepped frame plates 8, and the bottom surface of the stepped frame plate 8 is in contact with the upper surface of the stepped plate 6.

[0031] Specifically, in the assembled state, the stepped frame plates 8 on both sides of the connecting plate 7 overlap the upper surface of the stepped plate 6. The contact surfaces that fit together bear the weight of the connecting plate 7 and the filter 9. The fitting structure of the stepped frame plate 8 and the stepped plate 6 forms a bent seam path in the vertical section. When light passes through the seam between the connecting plate 7 and the partition plate 4, the bent gap blocks the straight propagation of the light. The stepped fitting structure reduces the situation where light passes directly through the assembly gap, which helps to reduce the interference of stray light on optical detection data.

[0032] Please see Figures 4-5The connecting plate 7 has a first through groove running vertically through the middle, and the filter 9 is embedded in the first through groove of the connecting plate 7. The outer edge of the filter 9 is attached to the inner wall of the connecting plate 7.

[0033] Specifically, the first through slot, running vertically through the entire structure, provides an unobstructed passage for the light beam of the optical detection system. To prevent the filter 9 from detaching from the bottom of the first through slot, an inwardly extending support step is provided at the bottom of the inner wall of the first through slot. The bottom edge of the filter 9 overlaps with the support step, and the filter 9 is placed inside the first through slot. The connecting plate 7 covers the outer side of the filter 9. When external vibrations are transmitted to the entire assembled filter, the connecting plate 7, as the outer structure, preferentially bears most of the mechanical stress. The outer edge of the filter 9 is in contact with the inner wall of the connecting plate 7, which restricts the horizontal displacement of the filter 9 inside the first through slot. The embedded installation structure reduces the direct pressing of the filter 9 surface by screws and other rigid fasteners, thus reducing the risk of edge breakage of the filter 9 during assembly operations or under stress.

[0034] Please see Figure 6 The bottom surface of the step plate 6 is provided with an ejector hole 12 extending upwards. The upper opening of the ejector hole 12 extends to the position directly below the connecting plate 7. The positions of the ejector hole 12 and the positioning hole 11 are staggered.

[0035] Specifically, when the internal filter 9 needs to be repaired or replaced, the operator first unlocks the cover 13 and removes it from inside the outer frame 3. Then, the operator inserts a tool such as a push rod through the ejection hole 12 on the bottom surface of the stepped plate 6. The external tool moves upward and abuts against the bottom of the connecting plate 7. The operator continues to apply upward pushing force to overcome the magnetic attraction of the magnetic strip 5 on the connecting plate 7, causing the connecting plate 7 to detach upward from the stepped plate 6. When the connecting plate 7 is properly assembled on the stepped plate 6, the solid area at the bottom of the connecting plate 7 completely blocks and covers the upper opening of the ejection hole 12, preventing external light from entering through the ejection hole 12 and causing light leakage. The structure of the ejection hole 12 provides a force channel for the disassembly of the connecting plate 7, avoiding the operator having to use tools to forcibly pry it from the upper gap of the connecting plate 7. This reduces the possibility of damage to the filter 9 or the edge of the connecting plate 7 due to uneven force during disassembly, and provides an operational basis for the later maintenance of the equipment.

[0036] Please see Figure 2 and Figure 7 The outer frame 3 has multiple pressure caps 13 inside, and each pressure cap 13 has a positioning plate 14 on its side wall. The positioning plate 14 is slidably connected between the two partitions 4, and the pressure cap 13 is located directly above the connecting plate 7.

[0037] Specifically, during the overall assembly of the multispectral combined filter, the operator places the pressure cap 13 above the corresponding slot space. The positioning plate 14 on the side wall of the pressure cap 13 slides downward against the inner wall of the slot space. The sliding connection between the positioning plate 14 and the inner wall of the slot space restricts the horizontal displacement of the pressure cap 13, guiding the pressure cap 13 to move directly above the connecting plate 7. To prevent the pressure cap 13 from coming off, a damping layer is provided between the positioning plate 14 and the inner wall of the slot space to form an interference fit, or the side wall of the partition plate 4 is provided with screw holes and the positioning plate 14 is locked with set screws. When assembled in place, the pressure cap 13 covers the inside of the outer frame 3, shielding the connecting plate 7 and the filter 9 below the pressure cap 13. The sliding connection of the positioning plate 14 simplifies the initial alignment and assembly steps. At the same time, the pressure cap 13 located directly above helps to prevent external dust particles from falling directly onto the surface of the filter 9, reducing the interference of dust impurities on optical transmittance.

[0038] Please see Figure 7 The bottom surface of the pressure cap 13 is provided with a relief groove 15, and a spring piece 16 is provided inside the relief groove 15.

[0039] Specifically, the relief groove 15 on the bottom surface of the pressure cover 13 provides the physical space for the installation and deformation of the spring piece 16. During assembly or operation, when the spring piece 16 is bent and deformed by external pressure, the spring piece 16 can retract into the relief groove 15. By adopting the structure of opening the relief groove 15, the spring piece 16 is prevented from being stuck by the solid bottom of the pressure cover 13 when it is deformed under pressure, thus ensuring the deformation stroke of the spring piece 16.

[0040] Please see Figure 7 One end of the spring piece 16 is fixedly abutted against the inner wall of the relief groove 15, and the other end of the spring piece 16 protrudes downward from the relief groove 15 and abuts against the top of the connecting plate 7.

[0041] Specifically, in order to fix the spring piece 16, one end of the spring piece 16 is fixed to the inner wall of the relief groove 15 by adhesive, spot welding or snap-fit. When the pressure cap 13 is installed inside the outer frame 3, the spring piece 16 protruding downward from the relief groove 15 contacts the top of the connecting plate 7. The connecting plate 7 exerts an upward squeezing force on the spring piece 16, causing the spring piece 16 to undergo elastic deformation. The spring piece 16 in the deformed state continuously applies a downward elastic force to the top of the connecting plate 7. The downward elastic force, together with the magnetic attraction force of the magnetic strip 5 on the bottom of the connecting plate 7, presses the connecting plate 7 downward onto the stepped plate 6. With the spring piece 16 abutting structure, when the equipment is subjected to external vibration, the spring piece 16 can absorb part of the vertical vibration energy, which helps to maintain the stability of the assembly position of the connecting plate 7 and the filter 9.

[0042] Please see Figures 4-5 The pressure cap 13 has a second through groove running vertically through the middle, and the size of the second through groove is the same as that of the filter 9.

[0043] Specifically, the second through slot in the middle of the cover 13 provides a penetration path for the external light beam to enter the filter 9. The size of the second through slot is consistent with the size of the effective light transmission area of ​​the filter 9, so that the external light beam can completely cover the working surface of the filter 9. At the same time, the solid part of the cover 13, except for the second through slot, blocks the top of the connecting plate 7 and the assembly gap between the connecting plate 7 and the partition 4. By adopting the structure of opening the second through slot, while allowing the light beam to pass normally, the solid part of the cover 13 blocks the light in the non-working area, reducing stray light entering the optical detection system and helping to improve the accuracy of optical detection data.

[0044] When assembling a multispectral combination filter, multiple connecting plates 7 equipped with filters 9 of different wavelengths are placed in the slot space formed between two adjacent partitions 4. The connecting plates 7 are moved downwards, and the positioning blocks 10 at the bottom of the connecting plates 7 are inserted into the positioning holes 11 of the stepped plates 6. The bottom of the connecting plates 7 overlaps the upper surface of the stepped plates 6. The magnetic strips 5 on the surface of the stepped plates 6 generate a downward magnetic force on the connecting plates 7 and attract the connecting plates 7. Then, multiple pressure caps 13 are placed above the corresponding slot spaces. The positioning plates 14 on the side walls of the pressure caps 13 slide downwards against the inner wall of the slot space, so that the pressure caps 13 move to the position directly above the connecting plates 7 and are locked. The spring pieces 16 on the bottom surface of the pressure caps 13 abut against the top of the connecting plates 7 and deform, applying a downward elastic force to the connecting plates 7.

[0045] After the overall assembly is completed, the multispectral combined filter is moved to the external optical inspection system. The positioning post of the external optical inspection system is fixed by passing through the alignment hole 2 at the corner of the splicing substrate 1. During operation, the external light beam passes through the second through slot in the middle of the pressure cover 13, irradiates and passes through the filter 9 and the first through slot in the middle of the connecting plate 7, and enters the interior of the external optical inspection system.

[0046] When disassembling the internal filter 9, release the lock of the cover 13 and remove the cover 13 from the slot space. Pass the push rod tool through the ejection hole 12 on the bottom surface of the stepped plate 6. Move the push rod tool upward and abut against the bottom of the connecting plate 7. Apply upward pushing force to overcome the magnetic force of the magnetic strip 5, so that the connecting plate 7 moves upward and separates from the stepped plate 6. Then remove the connecting plate 7 and the filter 9 from the slot space.

[0047] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to in the method section. This embodiment only describes an electromagnetic field structure designed using a Helmholtz coil and DC high voltage; other methods that utilize electromagnetic fields to confine plasma in a discharge region are within the scope of protection of this patent.

[0048] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A high-precision positioning spliced ​​multispectral combined filter, characterized in that, It includes a splicing substrate (1), an outer frame (3) is provided above the splicing substrate (1), a plurality of partitions (4) are provided inside the outer frame (3), a stepped plate (6) is provided on the opposite side wall of each partition (4), a plurality of connecting plates (7) are provided above the stepped plate (6), and a filter (9) is provided inside each of the plurality of connecting plates (7). The upper surface of the step plate (6) is provided with a magnetic strip (5) and a positioning hole (11), and the bottom of the connecting plate (7) is provided with a positioning block (10). The positioning block (10) is inserted into the positioning hole (11), and the bottom of the connecting plate (7) is magnetically connected to the magnetic strip (5).

2. The high-precision positioning spliced ​​multispectral combined filter according to claim 1, characterized in that, Alignment holes (2) are provided through the corners of the splicing substrate (1), and the horizontal outline area of ​​the splicing substrate (1) is greater than the horizontal outline area of ​​the outer frame (3).

3. A high-precision positioning spliced ​​multispectral combined filter according to claim 1, characterized in that, Multiple partitions (4) are arranged in parallel inside the outer frame (3), and a slot space is formed between two adjacent partitions (4) to accommodate the connecting plate (7).

4. A high-precision positioning spliced ​​multispectral combined filter according to claim 1, characterized in that, The connecting plate (7) has stepped frame plates (8) on both sides of its outer wall, and the bottom surface of the stepped frame plate (8) is in contact with the upper surface of the stepped plate (6).

5. A high-precision positioning spliced ​​multispectral combined filter according to claim 1, characterized in that, The connecting plate (7) has a first through groove running vertically through the middle. The filter (9) is embedded in the first through groove of the connecting plate (7). The outer edge of the filter (9) is in contact with the inner wall of the connecting plate (7).

6. A high-precision positioning spliced ​​multispectral combined filter according to claim 1, characterized in that, The bottom surface of the stepped plate (6) is provided with an ejector hole (12) extending upwards. The upper opening of the ejector hole (12) extends to the position directly below the connecting plate (7). The positions of the ejector hole (12) and the positioning hole (11) are offset from each other.

7. A high-precision positioning spliced ​​multispectral combined filter according to claim 1, characterized in that, The outer frame (3) is provided with multiple pressure caps (13), and each of the multiple pressure caps (13) has a positioning plate (14) on its side wall. The positioning plate (14) is slidably connected between the two partitions (4), and the pressure cap (13) is located directly above the connecting plate (7).

8. A high-precision positioning spliced ​​multispectral combined filter according to claim 7, characterized in that, The bottom surface of the pressure cap (13) is provided with a relief groove (15), and a spring piece (16) is provided inside the relief groove (15).

9. A high-precision positioning spliced ​​multispectral combined filter according to claim 8, characterized in that, One end of the spring piece (16) is fixedly abutted against the inner wall of the relief groove (15), and the other end of the spring piece (16) protrudes downward from the relief groove (15) and abuts against the top of the connecting plate (7).

10. A high-precision positioning spliced ​​multispectral combined filter according to claim 9, characterized in that, The pressure cap (13) has a second through groove in the middle that runs vertically through the middle, and the size of the second through groove is the same as the size of the filter (9).

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