Lens clamping device

Abstract

The utility model provides a lens clamping device, including base and mounting panel, the top surface of base is detachable connection with the bottom surface of mounting panel through the mode of magnetic adsorption, be equipped with a plurality of mounting units on mounting panel, a plurality of mounting units interval setting along the width direction of mounting panel, mounting unit includes the guide groove of being equipped with in the top surface of mounting panel and along the length direction interval of guide groove and is equipped with a plurality of mounting through -hole, each mounting through -hole is used to accommodate a piece of aspheric lens, guide groove extends along the length direction of mounting panel, a plurality of mounting through -holes are located in the slot mouth of guide groove just below, and the top opening of mounting through -hole is communicated with guide groove, and the bottom opening of mounting through -hole penetrates the bottom surface of mounting panel, the utility model discloses the bottom surface of mounting panel and the top surface of base can realize overall adhesion between, effectively solve the problem of insufficient sealing between fixture, simplify the fixture replacement process, greatly promote the detection efficiency, effectively adapt the quick detection demand of multi -specification lens.

Description

Technical Field

[0001] This utility model relates to the field of lens clamping technology, and in particular to a lens clamping device. Background Technology

[0002] As a core component of modern optical systems, the performance verification of aspherical lenses is highly dependent on the test results of high-precision equipment such as the UA3P automatic inspection instrument. During the inspection process, the stability and convenience of the clamping method used to clamp the aspherical lens directly affect the inspection efficiency and data reliability.

[0003] Currently, the clamping of aspherical lenses mainly adopts a hierarchical fixture structure. Specifically, the main positioning plate is first fixed to the base with multiple screws, and then the secondary positioning plate is fixed above the main positioning plate with multiple screws. This makes the ventilation groove on the base, the connecting hole on the main positioning plate, and the positioning hole on the secondary positioning plate connected to form a fixing groove structure that matches the lens to be tested. Then, the entire fixture structure loaded with multiple lenses is placed on the stage of the UA3P testing instrument for testing.

[0004] However, in practical applications, the joints between the base, main positioning plate, and secondary positioning plate connected by screws are prone to gaps due to uneven screw tightness and deviations in plate flatness, resulting in insufficient sealing and easy air leakage. This causes fluctuations in the lens's stress state during testing, affecting the reliability of the test results. Furthermore, when testing lenses of other diameters, multiple screws on the secondary and main positioning plates must be disassembled sequentially before replacing them with different diameter main and secondary positioning plates. This process is cumbersome, inefficient, and severely impacts testing efficiency. In addition, repeated screw disassembly and reassembly can introduce fixture positioning reference offsets, and combined with air pressure interference caused by air leakage, this further reduces testing accuracy. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a lens clamping device, which aims to solve the technical problems of existing aspherical lens clamping devices that mainly use a hierarchical fixture structure. In practical applications, the sealing between the base, main positioning plate and sub-positioning plate connected by screws is insufficient, which easily leads to air leakage and affects the reliability of the test results; the replacement process is cumbersome and inefficient; repeated disassembly and assembly of screws can easily introduce fixture positioning reference offset, and the air pressure interference caused by air leakage further reduces the test accuracy.

[0006] The purpose of this utility model is to provide a lens clamping device, including a base and a mounting plate. The top surface of the base is detachably connected to the bottom surface of the mounting plate by magnetic adsorption. The mounting plate is provided with multiple mounting units, which are spaced apart along the width direction of the mounting plate. The mounting unit includes a guide groove on the top surface of the mounting plate and a plurality of mounting through holes spaced apart along the length of the guide groove, each of the mounting through holes being used to accommodate an aspherical lens; The guide groove extends along the length of the mounting plate, and the plurality of mounting through holes are located directly below the opening of the guide groove. The top opening of the mounting through hole communicates with the guide groove, and the bottom opening of the mounting through hole penetrates the bottom surface of the mounting plate.

[0007] In addition, the lens clamping device according to the present invention may also have the following additional technical features: Furthermore, the top surface of the base is provided with a first magnetic layer, and the bottom surface of the mounting plate is provided with a second magnetic layer. The magnetic poles of the first magnetic layer and the second magnetic layer attract each other, so that the bottom surface of the mounting plate and the top surface of the base form a full-size surface contact adsorption connection.

[0008] Furthermore, both the first magnetic layer and the second magnetic layer are flexible magnetic films, and their magnetization direction is perpendicular to the plane of the base or mounting plate.

[0009] Furthermore, the mounting through hole is a stepped through hole with a circular cross-section, and the mounting through hole includes a large-diameter section communicating with the guide groove and a small-diameter section penetrating the bottom surface of the mounting plate; The guide groove has a groove shape that includes continuously alternating circular positioning holes and square operating openings. The number and position of the circular positioning holes correspond one-to-one with the mounting through holes, and their axes coincide with the axis of the mounting through holes. The diameter of the circular positioning holes is larger than the diameter of the large diameter section. The sidewall of the square operating port smoothly transitions to the wall of the circular positioning hole, the depth of the square operating port is consistent with the depth of the guide groove, and the width of the square opening is smaller than the diameter of the large diameter section.

[0010] Furthermore, the top edge of the guide groove and the end where the large diameter section connects to the bottom of the guide groove are respectively provided with guide slopes, and the inclination angle of the guide slopes is 30°-60°.

[0011] Furthermore, it also includes an air guiding unit, which comprises: An air guide channel is provided inside the base. The air guide channel extends along the length of the base. One end of the air guide channel passes through the side of the base and is connected to an air extraction device through an air extraction pipe. Multiple air guide grooves are spaced apart along the length of the base. The air guide grooves extend along the width of the base and are connected to the air guide channel through connecting through holes. The width of the groove opening is the same as the bottom opening diameter of the mounting through hole.

[0012] Furthermore, a throttling valve is provided at one end of the air extraction pipe that connects to the air guiding channel, for adjusting the negative pressure value in the air guiding channel.

[0013] Furthermore, it also includes a positioning unit, the positioning unit comprising: Two first positioning posts are spaced apart along the length of the base on the same side of the top surface of the base; The second positioning post is disposed in the middle of one side of the top surface of the base along the width direction of the base. When the two adjacent sides of the mounting plate abut against the two first positioning posts and the second positioning post respectively, the geometric center of the mounting plate coincides with the geometric center of the base.

[0014] Compared to existing technologies, the advantages of this lens clamping device are as follows: The connection between the mounting plate and the base in this application is achieved through magnetic adsorption. Specifically, the top surface of the base is provided with a first magnetic layer, and the bottom surface of the mounting plate is provided with a second magnetic layer that attracts the magnetic poles of the first magnetic layer. The bottom surface of the mounting plate and the top surface of the base can achieve a complete fit, effectively solving the problem of insufficient sealing of the fixtures in existing technologies. Furthermore, the mounting unit on the mounting plate includes a guide groove and multiple mounting through holes. Aspherical lenses of different diameters only need to be matched with mounting plates of corresponding specifications. Replacement only requires removing the old mounting plate, fitting the new mounting plate, and calibrating through the positioning unit, simplifying the fixture replacement process, significantly improving testing efficiency, and effectively adapting to the rapid testing needs of lenses of various specifications. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the lens clamping device of this utility model; Figure 2 This is a three-dimensional structural diagram of the base in the lens clamping device of this utility model; Figure 3 This is a top view of the base in the lens clamping device of this utility model; Figure 4 This is a three-dimensional structural diagram of the mounting plate in the lens clamping device of this utility model; Figure 5 This is a top view of the mounting plate in the lens clamping device of this utility model; Figure 6 This is a cross-sectional schematic diagram of the mounting plate in the lens clamping device of this utility model; Figure 7 This is a schematic diagram illustrating the use of the lens clamping device of this utility model.

[0016] The above-mentioned attached drawings include the following reference numerals: 10-base; 11-air guide groove; 12-air guide channel; 13-connecting through hole; 20-mounting plate; 21-guide groove; 211-circular positioning hole; 212-square operating port; 22-mounting through hole; 23-guide slope; 31-first positioning post; 32-second positioning post; 41-throttle valve; 42-extraction pipe; 50-lens; 60-stage.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figures 1 to 7The image shows a lens clamping device according to the present invention, including a base 10 and a mounting plate 20. The top surface of the base 10 is detachably connected to the bottom surface of the mounting plate 20 by magnetic adsorption. The mounting plate 20 has multiple mounting units spaced apart along its width. In this embodiment, the top surface of the base 10 has a first magnetic layer, and the bottom surface of the mounting plate 20 has a second magnetic layer. The magnetic poles of the first and second magnetic layers attract each other, forming a full-size surface contact adsorption connection between the bottom surface of the mounting plate 20 and the top surface of the base 10. More specifically, both the first and second magnetic layers are flexible magnetic films with magnetization directions perpendicular to the plane of the base 10 or the mounting plate 20. The magnetic flux density deviation within any 10mm × 10mm area is ≤5%, and the adsorption force is evenly distributed across the entire contact surface, ensuring complete adhesion between the bottom surface of the mounting plate 20 and the top surface of the base 10, reducing the risk of air leakage. In some embodiments, the installation of the first magnetic layer and the second magnetic layer on the top surface of the corresponding base 10 or the bottom surface of the mounting plate 20 can be as follows: the top surface of the base 10 or the bottom surface of the mounting plate 20 is respectively provided with mounting grooves adapted to the first magnetic layer or the second magnetic layer, and the first magnetic layer or the second magnetic layer is attached to the mounting grooves by means of high temperature resistant pressure-sensitive adhesive. It should be noted that the installation of the corresponding magnetic layer on the top surface of the base 10 or the bottom surface of the mounting plate 20 is not limited to the installation method of the above embodiments, and can also be other installation methods that can achieve the purpose of this application.

[0022] The mounting unit includes a guide groove 21 on the top surface of the mounting plate 20 and a plurality of mounting through holes 22 spaced apart along the length of the guide groove 21. Each mounting through hole 22 is used to accommodate an aspherical lens. The guide groove 21 extends along the length of the mounting plate 20, and the plurality of mounting through holes 22 are located directly below the opening of the guide groove 21. The top opening of the mounting through hole 22 communicates with the guide groove 21, and the bottom opening of the mounting through hole 22 penetrates the bottom surface of the mounting plate 20.

[0023] Furthermore, the mounting through hole 22 is a stepped through hole with a circular cross-section. The mounting through hole 22 includes a large-diameter section communicating with the guide groove 21 and a small-diameter section penetrating the bottom surface of the mounting plate 20. The guide groove 21 has an alternating shape of circular positioning holes 211 and square operating openings 212. The number and position of the circular positioning holes 211 correspond one-to-one with the mounting through holes 22, and their axes coincide with the axis of the mounting through holes 22. The diameter of the circular positioning holes 211 is larger than the diameter of the large-diameter section, and the diameter of the large-diameter section is adapted to the lens diameter. The sidewall of the square operating opening 212 smoothly transitions to the wall of the circular positioning holes 211. The depth of the square operating opening 212 is consistent with the depth of the guide groove 21. The width of the square opening is smaller than the diameter of the large-diameter section. The square operating opening 212 facilitates the operator's fingers to easily and quickly insert or remove the lens from the corresponding mounting through hole 22.

[0024] Furthermore, guide slopes 23 are provided at the top edge of the guide groove 21 and at the end where the large-diameter section connects to the bottom of the guide groove 21. The inclination angle of the guide slopes 23 is 30°-60°. The guide slopes 23 can effectively prevent hard friction between the lens and the edge of the through hole, protecting the optical surface of the lens. As a specific example, in this embodiment, the inclination angle of the guide slopes 23 is 45°.

[0025] The lens clamping device of this application also includes an air guiding unit, which includes an air guiding channel 12 and a plurality of air guiding grooves 11. The air guiding channel 12 is disposed inside the base 10 and extends along the length direction of the base 10. One end of the air guiding channel 12 penetrates the side of the base 10 and is connected to an air extraction device through an air extraction pipe 42. The plurality of air guiding grooves 11 are spaced apart along the length direction of the base 10 and extend along the width direction of the base 10. They are connected to the air guiding channel 12 through a connecting through hole 13. The groove opening width of the air guiding groove 11 is the same as the bottom opening diameter of the mounting through hole 22. As a specific example, in this embodiment, a connecting through hole 13 is provided in the middle of the guide groove 21 along the length direction. The connecting through hole 13 extends along the thickness direction of the base 10 and has a circular cross-section.

[0026] Furthermore, a throttle valve 41 is provided at one end of the air extraction pipe 42 that connects to the air guide channel 12, for adjusting the negative pressure value in the air guide channel 12.

[0027] The lens clamping device of this application also includes a positioning unit, which includes two first positioning posts 31 and one second positioning post 32. The two first positioning posts 31 are spaced apart along the length direction of the base 10 on the same side of the top surface of the base 10, and the second positioning post 32 is located in the middle of one side of the top surface of the base 10 along the width direction of the base 10. When the two adjacent sides of the mounting plate 20 abut against the two first positioning posts 31 and the second positioning post 32 respectively, the geometric center of the mounting plate 20 coincides with the geometric center of the base 10, and the distance between the outer edge of the bottom surface of the mounting plate 20 and the outer edge of the top surface of the base 10 is equal. At the same time, the small diameter section of the mounting through hole 22 is connected to the groove of the air guide groove 11 to realize the connection between the air guide channel 12, the connecting through hole 13, the air guide groove 11 and the mounting through hole 22. As a specific example, in this embodiment, the outer contours of the mounting plate 20 and the base 10 are both square structures.

[0028] In practical applications, the working principle of the lens clamping device of this application can be as follows: First, with the extension direction of the guide groove 21 on the mounting plate 20 perpendicular to the extension direction of the air guide groove 11, the mounting plate 20 is placed on the top surface of the base 10 until the two adjacent sides of the mounting plate 20 abut against the circumferential surfaces of the two first positioning posts 31 and the second positioning posts 32, respectively. At this time, the geometric center of the mounting plate 20 coincides with the geometric center of the base 10, and the distance between the outer edge of the bottom surface of the mounting plate 20 and the outer edge of the top surface of the base 10 is uniform. At the same time, the second magnetic layer on the bottom surface of the mounting plate 20 and the first magnetic layer on the top surface of the base 10 attract each other due to the magnetic poles, quickly forming a full-size surface contact adsorption connection, realizing a stable fit between the mounting plate 20 and the base 10, and the small diameter sections of the multiple mounting through holes 22 in a single mounting unit will be precisely connected to the corresponding air guide groove 11 openings on the top surface of the base 10.

[0029] Next, place the aspherical lens 50 to be tested in each mounting through hole 22, ensuring that the bottom of the lens 50 abuts against the bottom surface of the step in the mounting through hole 22. Then, place the lens clamping device, which contains multiple aspherical lenses 50, on the stage 60 of the UA3P automatic inspection instrument, ensuring that the entire device is aligned with the positioning reference of the stage 60. Start the suction device, which connects to the air guide channel 12 inside the base 10 via a suction pipe 42 with a throttle valve 41. This extracts air from the air guide channel 12, creating a stable negative pressure environment in the suction channel formed by the air guide channel 12, connecting through hole 13, air guide groove 11, and mounting through hole 22. Under the combined effect of negative pressure suction and the support of the bottom surface of the step, the lens's installation stability is further enhanced, ensuring constant force on the lens throughout the inspection process. This provides the UA3P automatic inspection instrument with a stable inspection environment free from air pressure fluctuations, reducing the deviation rate of inspection data and significantly improving data reliability.

[0030] Compared to existing technologies, the advantages of this lens clamping device are as follows: The connection between the mounting plate and the base in this application is achieved through magnetic adsorption. Specifically, the top surface of the base is provided with a first magnetic layer, and the bottom surface of the mounting plate is provided with a second magnetic layer that attracts the magnetic poles of the first magnetic layer. The bottom surface of the mounting plate and the top surface of the base can achieve a complete fit, effectively solving the problem of insufficient sealing of the fixtures in existing technologies. Furthermore, the mounting unit on the mounting plate includes a guide groove and multiple mounting through holes. Aspherical lenses of different diameters only need to be matched with mounting plates of corresponding specifications. Replacement only requires removing the old mounting plate, fitting the new mounting plate, and calibrating through the positioning unit, simplifying the fixture replacement process, significantly improving testing efficiency, and effectively adapting to the rapid testing needs of lenses of various specifications.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model application should be determined by the appended claims.

Claims

1. A lens clamping device, characterized by, It includes a base and a mounting plate. The top surface of the base is detachably connected to the bottom surface of the mounting plate by magnetic adsorption. The mounting plate is provided with multiple mounting units, which are spaced apart along the width direction of the mounting plate. The mounting unit includes a guide groove on the top surface of the mounting plate and a plurality of mounting through holes spaced apart along the length of the guide groove, each of the mounting through holes being used to accommodate an aspherical lens; The guide groove extends along the length of the mounting plate, and the plurality of mounting through holes are located directly below the opening of the guide groove. The top opening of the mounting through hole communicates with the guide groove, and the bottom opening of the mounting through hole penetrates the bottom surface of the mounting plate.

2. The lens clamping device of claim 1, wherein, The top surface of the base is provided with a first magnetic layer, and the bottom surface of the mounting plate is provided with a second magnetic layer. The magnetic poles of the first magnetic layer and the second magnetic layer attract each other, so that the bottom surface of the mounting plate and the top surface of the base form a full-size surface contact adsorption connection.

3. The lens clamping device of claim 2, wherein, Both the first magnetic layer and the second magnetic layer are flexible magnetic films, and their magnetization direction is perpendicular to the plane of the base or mounting plate.

4. The lens clamping device of claim 1, wherein, The mounting through hole is a stepped through hole with a circular cross-section. The mounting through hole includes a large-diameter section that communicates with the guide groove and a small-diameter section that penetrates the bottom surface of the mounting plate. The guide groove has a groove shape that includes continuously alternating circular positioning holes and square operating openings. The number and position of the circular positioning holes correspond one-to-one with the mounting through holes, and their axes coincide with the axis of the mounting through holes. The diameter of the circular positioning holes is larger than the diameter of the large diameter section. The sidewall of the square operating port smoothly transitions to the wall of the circular positioning hole, the depth of the square operating port is consistent with the depth of the guide groove, and the width of the square opening is smaller than the diameter of the large diameter section.

5. The lens clamping device of claim 4, wherein, The top edge of the guide groove and the end where the large diameter section connects to the bottom of the guide groove are respectively provided with guide slopes, and the inclination angle of the guide slopes is 30°-60°.

6. The lens clamping device of claim 1, wherein, It also includes an air guiding unit, which includes: An air guide channel is provided inside the base. The air guide channel extends along the length of the base. One end of the air guide channel passes through the side of the base and is connected to an air extraction device through an air extraction pipe. Multiple air guide grooves are spaced apart along the length of the base. The air guide grooves extend along the width of the base and are connected to the air guide channel through connecting through holes. The width of the groove opening is the same as the bottom opening diameter of the mounting through hole.

7. The lens clamping device of claim 6, wherein, The end of the air extraction pipe connected to the air guide channel is equipped with a throttle valve, which is used to adjust the negative pressure value in the air guide channel.

8. The lens clamping device of claim 1, wherein, It also includes a positioning unit, which comprises: Two first positioning posts are spaced apart along the length of the base on the same side of the top surface of the base; The second positioning post is disposed in the middle of one side of the top surface of the base along the width direction of the base. When the two adjacent sides of the mounting plate abut against the two first positioning posts and the second positioning post respectively, the geometric center of the mounting plate coincides with the geometric center of the base.

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