Optical lens measuring device

Abstract

The utility model provides an optical lens measuring device which comprises a rack, a workbench fixedly installed on the rack, a portal frame and a conveying belt fixedly installed on the workbench, the conveying belt penetrating through the portal frame, an X-axis moving mechanism fixedly installed on the portal frame, a moving plate in driving connection with the X-axis moving mechanism, and a Z-axis moving structure fixedly installed on the moving plate. The Z-axis moving structure is in driving connection with a lifting frame, a measuring instrument and a camera are fixedly installed on the lifting frame, and a fixing jig is placed on the conveying belt. During operation, the conveying belt conveys the fixing jig along the Y axis, the optical lens is placed on the fixing jig, the controller shoots through the camera, positions the position of the fixing jig, controls the conveying belt to start and stop and ensures that the fixing jig is located below the measuring instrument, and the Z-axis moving structure drives the measuring instrument to move downwards to measure the optical lens. According to the utility model, through automatic flow measurement, the measurement efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of measurement technology, specifically relating to an optical lens measuring device. Background Technology

[0002] An optical lens is an optical element made of glass or other transparent materials, whose surface typically includes one or more precisely designed curved surfaces. Its core function is to alter the visual size (magnification or reduction) and sharpness of objects viewed through it, and it is widely used in eyeglasses, cameras, telescopes, and other fields. In existing measurement techniques, when measuring the thickness of optical lenses with concave and convex surfaces, the lens under test is usually placed on a horizontal measuring platform, relying on its own weight for stable positioning, and then a dial indicator is used for vertical contact measurement. However, existing measuring devices are relatively inefficient.

[0003] Chinese utility model patent CN218380871U discloses an optical lens measuring device, including a base, multiple sliders, and a movable component. A support rod is fixedly mounted on the base, and a dial indicator is fixedly mounted on the support rod. The measuring head of the dial indicator is located directly above the base. The base has multiple symmetrically arranged sliding grooves, each movably connecting to a plurality of sliders. A movable slot is provided within the base, and a motor is fixedly mounted within the movable slot. The movable component is movably mounted within the movable slot, and the motor drives the movable component. The movable component cooperates with the sliders. This utility model achieves accurate placement of the lens directly below the measuring head by having multiple sliders slide synchronously towards the center of the base, pushing and holding the lens there, thus reducing measurement errors. However, its detection efficiency is low. Utility Model Content

[0004] The purpose of this invention is to provide an optical lens measuring device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an optical lens measuring device, comprising a frame, a worktable fixedly mounted on the frame, a gantry frame and a conveyor belt fixedly mounted on the worktable, the conveyor belt passing through the gantry frame, an X-axis moving mechanism fixedly mounted on the gantry frame, a moving plate driven by the X-axis moving mechanism, a Z-axis moving structure fixedly mounted on the moving plate, a lifting frame driven by the Z-axis moving structure, a measuring instrument and a camera fixedly mounted on the lifting frame, and a fixed fixture placed on the conveyor belt.

[0006] Preferably, the workbench is fixedly equipped with two conveyor belts side by side.

[0007] Preferably, the four corners of the fixing fixture are provided with positioning marks.

[0008] Preferably, the camera is a CCD sensor camera.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This utility model features a workbench with a fixedly mounted gantry and conveyor belt, the conveyor belt passing through the gantry. An X-axis moving mechanism is fixedly mounted on the gantry to drive a moving plate. A Z-axis moving structure is fixedly mounted on the moving plate to drive a lifting frame. A fixed fixture is placed on the conveyor belt. A measuring instrument and a camera are fixedly mounted on the lifting frame. The measuring instrument measures the thickness of an optical lens, and the camera positions the fixed fixture on the conveyor belt. During operation, the conveyor belt transports the fixed fixture along the Y-axis, with the optical lens placed on it. The controller uses the camera to capture and position the fixed fixture, controlling the start and stop of the conveyor belt to ensure the fixed fixture is below the measuring instrument. The Z-axis moving structure drives the measuring instrument to move downwards to measure the optical lens. This utility model improves measurement efficiency through automated flow measurement. Attached Figure Description

[0011] Figure 1 This is a structural view of the present invention.

[0012] Figure 2 This is a structural view of the gantry frame of this utility model.

[0013] Figure 3 This is a structural view of the fixing fixture of this utility model.

[0014] The diagram is labeled as follows: 1. Frame; 2. Workbench; 3. Gantry; 4. Conveyor belt; 5. X-axis moving mechanism; 6. Moving plate; 7. Z-axis moving structure; 8. Lifting frame; 9. Measuring instrument; 10. Camera; 11. Fixture; 12. Positioning mark. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1:

[0017] like Figures 1-3As shown, this utility model provides an optical lens measuring device, including a frame 1. A worktable 2 is fixedly mounted on the frame 1. A gantry frame 3 and a conveyor belt 4 are fixedly mounted on the worktable 2. The conveyor belt 4 passes through the gantry frame 3. An X-axis moving mechanism 5 is fixedly mounted on the gantry frame 3. A moving plate 6 is driven and connected to the X-axis moving mechanism 5. A Z-axis moving structure 7 is fixedly mounted on the moving plate 6. A lifting frame 8 is driven and connected to the Z-axis moving structure 7. A measuring instrument 9 and a camera 10 are fixedly mounted on the lifting frame 8. A fixing fixture 11 is placed on the conveyor belt 4. Two conveyor belts 4 are fixedly mounted side-by-side on the worktable 2. Positioning marks 12 are provided at the four corners of the fixing fixture 11. The camera 10 is a CCD sensor camera.

[0018] Through the above technical solution, the workbench 2 of this utility model is fixedly installed with a gantry frame 3 and a conveyor belt 4, with the conveyor belt 4 passing through the gantry frame 3. An X-axis moving mechanism 5 is fixedly installed on the gantry frame 3 to drive the moving plate 6 to move. A Z-axis moving structure 7 is fixedly installed on the moving plate 6 to drive the lifting frame 8 to move. A fixed fixture 11 is placed on the conveyor belt 4. A measuring instrument 9 and a camera 10 are fixedly installed on the lifting frame 8. The measuring instrument 9 is used to measure the thickness of the optical lens, and the camera 10 is used to position the fixed fixture 11 on the conveyor belt 4. During operation, the conveyor belt 4 transports the fixed fixture 11 along the Y-axis, and the optical lens is placed on the fixed fixture 11. The controller uses the camera 10 to capture and position the fixed fixture 11, and controls the start and stop of the conveyor belt 4 to ensure that the fixed fixture 11 is located below the measuring instrument 9. The Z-axis moving structure 7 drives the measuring instrument 9 to move downwards to measure the optical lens. This utility model improves measurement efficiency through automated flow measurement.

[0019] Example 2:

[0020] like Figures 1-3 As shown, this embodiment achieves efficient measurement of optical lenses through an automated assembly line approach. The core of the device lies in transforming the traditional static measurement method into a dynamic assembly line operation. The conveyor belt 4 continuously transports the lens under test, and a precise positioning system and multi-axis motion mechanism complete the automated measurement. In this embodiment, the workbench 2 serves as the mounting base for the entire device, and the gantry 3 fixedly mounted on it provides a stable support structure for the measurement system. The design of the conveyor belt 4 passing through the gantry 3 allows the lens under test to be continuously transported to the measurement station. This layout ensures both the continuity of the measurement process and the stability of the measurement system.

[0021] In the actual operation, the fixture 11 is placed on the conveyor belt 4 to support the optical lens. The fixture 11 is specially designed to ensure that the lens maintains a stable posture during transportation, avoiding positional displacement due to vibration or inertia. When the fixture 11 moves with the conveyor belt 4 to below the gantry 3, the camera 10 system starts working, using image recognition technology to accurately locate the position of the fixture 11. The camera 10 is mounted on the lifting frame 8, forming an integrated measurement system with the measuring instrument 9. This integrated design saves space and ensures the consistency of the measurement reference.

[0022] The X-axis moving mechanism 5 drives the moving plate 6 to move horizontally. This motion axis design allows the measuring system to cover the entire width of the conveyor belt 4. The Z-axis moving structure 7 mounted on the moving plate 6 drives the lifting frame 8 to move vertically, enabling precise lifting and lowering of the measuring instrument 9. This combined application of a dual-axis motion system allows the measuring probe to be precisely positioned at any measurement point on the lens under test. The measuring instrument 9 adopts a non-contact measurement principle, using optical or laser technology to achieve precise measurement of lens thickness, avoiding potential damage to the lens surface caused by traditional contact measurements.

[0023] When the device is in operation, the controller first acquires the position information of the fixed fixture 11 through the camera 10, and then controls the conveyor belt 4 to stop running, so that the fixed fixture 11 accurately stops at the measurement position. Subsequently, the X-axis moving mechanism 5 and the Z-axis moving structure 7 work together to position the measuring instrument 9 above the measurement point of the lens to be measured. The measuring instrument 9 slowly descends to the preset measurement position under the Z-axis drive, and automatically rises after completing the thickness measurement. The entire measurement process is fully automated, requiring no manual intervention, which significantly improves measurement efficiency. The measurement data is transmitted to the control system in real time for processing and analysis, and can generate measurement reports or trigger the sorting mechanism as needed.

[0024] The innovation of this embodiment lies in transforming the traditional single-piece measurement mode into a continuous assembly line operation mode. Through the organic combination of conveyor belt 4, fixed fixture 11, and multi-axis motion system, batch automated measurement of optical lenses is achieved. The introduction of the camera 10 positioning system ensures the accuracy of the measurement position, while the dual-axis motion mechanism provides flexible measurement point selection capabilities. This design not only significantly improves measurement efficiency but also reduces human error through automated control, ensuring the reliability and consistency of measurement results. The device is particularly suitable for mass production inspection scenarios of optical lenses, meeting the demands of the modern optical manufacturing industry for efficient and accurate measurement.

[0025] Example 3:

[0026] like Figures 1-3As shown, this embodiment significantly improves measurement efficiency and stability through the dual conveyor belt structure 4. Two conveyor belts 4 are fixedly installed side-by-side on the worktable 2. The two conveyor belts 4 are arranged in parallel with an adjustable spacing to accommodate fixtures 11 of different sizes. The conveyor belts 4 use synchronous belt drive and are driven by servo motors to ensure precise control of the conveying speed. The fixture 11 is placed on the conveyor belts 4 to support the optical lens to be measured. The surface of the fixture has positioning grooves to ensure that the lens maintains a stable posture during transport.

[0027] A gantry frame 3 spans two conveyor belts 4, and an X-axis moving mechanism 5 is mounted on top of it. The X-axis moving mechanism 5 uses linear guides and ball screws for transmission, driven by a stepper motor, enabling rapid switching of the measuring instrument 9 between the two conveyor belts 4. A moving plate 6 is connected to the X-axis moving mechanism 5 and moves along the X-axis. A Z-axis moving structure 7 is fixedly mounted on the moving plate 6, driven by a cylinder, which drives the lifting frame 8 to move vertically. The lifting frame 8 integrates a non-contact laser measuring instrument 9 and a high-resolution industrial camera 10. The camera 10 is used to capture images of the fixed fixture 11 on the conveyor belts 4 in real time, and to accurately locate the fixture position using image processing algorithms.

[0028] During measurement, the controller stops the conveyor belt 4 based on the fixture position information fed back by the camera 10, ensuring the fixture is precisely positioned below the measuring instrument 9. Subsequently, the Z-axis moving mechanism 7 drives the measuring instrument 9 to descend to a preset height for rapid lens thickness measurement. Due to the dual conveyor belt 4 design, while a lens is being measured on one conveyor belt 4, the other conveyor belt 4 can simultaneously perform loading and unloading operations, enabling a streamlined measurement process. After measurement, the X-axis moving mechanism 5 automatically switches to the other conveyor belt 4 according to the program settings to continue the measurement task.

[0029] The key to this embodiment lies in its parallel operation of two conveyor belts 4, which effectively solves the efficiency bottleneck of traditional single-conveyor-belt 4 measuring devices. The two conveyor belts 4 can be controlled independently, enabling simultaneous measurement and loading / unloading. Simultaneously, the precise positioning capability of the X-axis moving mechanism 5 ensures rapid switching of the measuring instrument 9 between the two conveyor belts 4, further shortening the measurement cycle. Furthermore, the positioning groove design of the fixture, combined with the visual positioning of the camera 10, ensures the positional stability of the lens during high-speed transport, thereby improving measurement accuracy. The entire system achieves efficient batch inspection of optical lens thickness through automated control.

[0030] Example 4:

[0031] like Figures 1-3As shown, the four corners of the fixing fixture 11 in this embodiment are provided with positioning marks 12. These marks adopt a high-contrast geometric pattern design, such as circles or crosses, which can be clearly identified by the camera 10. The positioning marks 12 are arranged according to the principle of symmetrical distribution, ensuring that the camera 10 can accurately capture at least two or more marks regardless of the angle of the fixing fixture 11 on the conveyor belt 4.

[0032] The positioning marker 12 is made of wear-resistant material and is fixed to the surface of the fixture using laser engraving or etching processes, ensuring that it will not become blurred due to friction during long-term use. The size of the marker is precisely calculated to match the field of view and resolution of the camera 10, ensuring optimal imaging results at the standard working distance. When the conveyor belt 4 moves the fixed fixture 11, the camera 10 acquires the fixture's position information through continuous shooting, and the control system calculates the coordinate position of the marker point in real time based on the image recognition algorithm.

[0033] During the measurement process, when the fixture 11 enters the working area below the gantry 3, the camera 10 first captures images of the positioning marks 12 on the fixture. The image processing system, by identifying the positions of these marks, can accurately calculate the spatial positional relationship between the fixture and the measuring instrument 9. This positioning method overcomes the cumulative error problem inherent in traditional mechanical positioning and is particularly suitable for the measurement needs of high-precision optical lenses. Based on the identification results, the system automatically adjusts the positions of the X-axis moving mechanism 5 and the Z-axis moving structure 7, enabling the measuring instrument 9 to accurately align with the measurement points of the lens under test.

[0034] The positioning mark 12 also enables automatic fixture calibration. When the fixture experiences minor deformation or positional shift due to long-term use, the system automatically calculates compensation parameters by comparing the relative positions of the four mark points, ensuring that measurement accuracy is not affected. This design significantly reduces the difficulty and frequency of equipment maintenance and improves the stability of the production line. Simultaneously, the arrangement of the marks at the four corners allows the system to detect the fixture's horizontal state, providing early warning or automatic compensation when fixture tilt is detected.

[0035] In the actual workflow, conveyor belt 4 delivers the fixture 11 carrying the optical lens into the measurement area. Camera 10 first captures an image of the fixture, identifies the positioning marks 12 at the four corners, and then calculates the precise position and orientation of the fixture using the principle of triangulation. The control system adjusts the position of the measuring instrument 9 based on this data, ensuring that its measuring probe is perpendicularly aligned with the area to be measured of the lens. The entire positioning process is completed within milliseconds, achieving highly efficient and accurate automated measurement.

[0036] This vision-based positioning measurement device is particularly suitable for batch inspection scenarios. Multiple fixed fixtures 11 can continuously pass through the measurement area, and positioning marks 12 on each fixture ensure that the measurement system can quickly and accurately identify and locate the fixture. Compared with traditional manual positioning methods, this design reduces positioning time by more than 90% while improving positioning accuracy to the micrometer level. The standardized design of the positioning marks 12 also allows for the interchangeability of fixtures from different batches, greatly improving the equipment's versatility and flexibility.

[0037] Example 5:

[0038] like Figures 1-3 As shown, the camera 10 in this embodiment is a CCD sensor camera 10. The optical lens measuring device achieves efficient measurement through an automated production line, the core of which lies in utilizing the high-precision imaging characteristics of the CCD sensor camera 10 to achieve precise positioning of the fixed fixture 11. When the conveyor belt 4 transports the fixed fixture 11 along the Y-axis, the CCD sensor camera 10 captures the image information of the fixed fixture 11 in real time, and accurately identifies the position coordinates of the fixed fixture 11 on the conveyor belt 4 through image processing algorithms. Due to the high resolution and fast response characteristics of the CCD sensor, it can ensure that clear image data can still be obtained when the conveyor belt 4 is running at high speed, providing a reliable basis for subsequent positioning control.

[0039] In the actual operation, the CCD sensor camera 10 is mounted on the lifting frame 8, maintaining a fixed relative position with the measuring instrument 9. When the fixed fixture 11 enters the area of ​​the gantry 3, the CCD sensor camera 10 begins to continuously capture images, transmitting the image data to the control system. The control system analyzes the image feature points to calculate the offset of the fixed fixture 11 relative to the center of the measuring instrument 9, and adjusts the running state of the conveyor belt 4 accordingly, so that the fixed fixture 11 stops precisely below the measuring instrument 9. This vision-based positioning control method avoids the cumulative error problem of traditional mechanical limit devices, greatly improving positioning accuracy.

[0040] Another important function of the CCD sensor camera 10 is to assist the measuring instrument 9 in measuring lens parameters. While the measuring instrument 9 is measuring the thickness of the optical lens, the CCD sensor camera 10 can simultaneously acquire images of the lens's surface morphology. By combining optical measurement data with visual image information, a more comprehensive assessment of lens quality can be achieved. For example, when the measuring instrument 9 detects a thickness anomaly, it can retrieve the corresponding image recorded by the CCD sensor camera 10, helping operators quickly determine whether the anomaly is due to a defect in the lens itself or an anomaly that occurred during the measurement process.

[0041] By employing a CCD sensor camera 10 as the core component for visual positioning, this embodiment achieves a high degree of automation in the optical lens measurement process. Compared to traditional manual or mechanical positioning methods, this machine vision-based solution offers greater flexibility and adaptability, meeting the measurement needs of different types of optical lenses while significantly improving production efficiency and measurement accuracy. The entire system operates stably and reliably, making it particularly suitable for online inspection applications in high-volume optical lens production processes.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An optical lens measuring device, comprising a frame, wherein a worktable is fixedly mounted on the frame, characterized in that, The workbench is fixedly equipped with a gantry frame and a conveyor belt. The conveyor belt passes through the gantry frame. The gantry frame is fixedly equipped with an X-axis moving mechanism. The X-axis moving mechanism is driven and connected to a moving plate. The moving plate is fixedly equipped with a Z-axis moving structure. The Z-axis moving structure is driven and connected to a lifting frame. The lifting frame is fixedly equipped with a measuring instrument and a camera. The conveyor belt is equipped with a fixed fixture.

2. The optical lens measuring device according to claim 1, characterized in that, The workbench is fixedly equipped with two conveyor belts side by side.

3. The optical lens measuring device according to claim 1, characterized in that, The four corners of the fixing fixture are provided with positioning marks.

4. The optical lens measuring device according to claim 1, characterized in that, The camera is a CCD sensor camera.

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