An optical lens inspection device

Abstract

The utility model discloses a kind of detection devices for optical lens, including shell, bearing assembly and detection assembly, shell has two groups of mutually isolated chambers, the front end of each group of chamber is provided with through slot, bearing assembly includes two groups of movable plate, each group of movable plate is slidably connected with a group of chamber, two groups of movable plate are staggered into, move out corresponding chamber, and each group of movable plate is provided with the positioning part for positioning and placing optical lens, two groups of detection assembly are respectively distributed in a group of chamber, for carrying out visual automatic detection to optical lens in chamber;Through the staggered parallel working design of double-chamber and double movable plate, seamless link of detection process and feeding and discharging operation is realized, detection rhythm is greatly shortened, detection efficiency is high, feeding and discharging operation is located in chamber exterior, and operation is simple.

Description

Technical Field

[0001] This utility model relates to the field of optical lens technology, specifically to a detection device for optical lenses. Background Technology

[0002] Optical lenses are widely used in digital cameras, lasers, security systems, and various optical instruments. Their surface quality, geometric parameters, and optical performance directly determine the final performance of the entire system.

[0003] Optical lenses may have defects on their surface after production. Current inspection methods can be broadly divided into two types: contact measurement and non-contact measurement. Non-contact optical measurement has become the mainstream method due to its non-destructive and high-efficiency characteristics. For example, an industrial camera can be used to capture images of the lens under specific lighting conditions. Then, image processing and pattern recognition algorithms can be used to detect scratches, pits, dirt, etc. on the surface. Deep learning algorithms can significantly improve the accuracy of identifying minute defects and the level of automation.

[0004] When inspecting optical lenses using industrial cameras, external light pollution can affect the actual inspection results. Placing the optical lens in a space that isolates some light pollution makes the operation relatively cumbersome and reduces inspection efficiency. To address these issues, we propose an optical lens inspection device that can solve these problems. Utility Model Content

[0005] The purpose of this invention is to provide a detection device for optical lenses to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a detection device for optical lenses, comprising:

[0007] The shell has two sets of mutually isolated chambers, and each set of chambers has a through groove at its front end;

[0008] The support assembly includes two sets of movable plates, each set of movable plates being slidably connected to a set of chambers. The two sets of movable plates alternately move into and out of the corresponding chambers, and each set of movable plates is provided with a positioning part for positioning and placing an optical lens.

[0009] The detection components consist of two sets, each distributed within one of the chambers, and are used for automatic visual detection of optical lenses entering the chambers.

[0010] As a preferred technical solution, the detection component includes an industrial camera and a lighting lamp, the lighting lamp being located below the industrial camera and used to generate dark field illumination.

[0011] As a preferred technical solution, the detection component further includes a processing unit, which is electrically connected to the industrial camera and the lighting lamp, and the processing unit can independently turn the lighting lamp on, off, or adjust its brightness.

[0012] As a preferred technical solution, a base plate is connected to the front end of the housing, and a gear is rotatably connected to the base plate. The two sets of movable plates are respectively connected to racks that mesh with the gears.

[0013] As a preferred technical solution, the substrate is provided with two sets of positioning blocks, and each set of racks is connected to a sliding groove for the positioning block to slide and engage. The sliding groove is used to limit the distance by which the movable plate moves into and out of the corresponding cavity.

[0014] As a preferred technical solution, each end of the slide is provided with a suction block that can magnetically contact the positioning block.

[0015] As a preferred technical solution, the positioning part includes multiple sets of positioning rods that are movably inserted through the movable plate. The shape formed by the multiple sets of positioning rods is consistent with the shape of the optical lens. The lower ends of the multiple sets of positioning rods are connected to a horizontal plate, and each set of positioning rods is wound with a spring.

[0016] As a preferred technical solution, each set of positioning rods is fitted with a detachable and replaceable sleeve, and multiple sets of sleeves are used to adapt to optical lenses of different sizes.

[0017] As a preferred technical solution, each set of chambers is equipped with a servo electric cylinder, and the movable rod of the servo electric cylinder is connected to a pressure plate. The pressure plate can press down the horizontal plate to drive multiple sets of positioning rods to retract into the movable plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The staggered parallel working design of the dual chambers and dual movable plates achieves seamless connection between the detection process and the loading and unloading operation, greatly shortens the detection cycle, and improves detection efficiency. The loading and unloading operation is located outside the chambers, making operation simple. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure;

[0021] Figure 2 This is a schematic diagram showing the meshing relationship between the gear and two sets of racks.

[0022] Figure 3 This is a schematic diagram showing two sets of detection components distributed within a single chamber.

[0023] Figure 4 This is a schematic diagram of the positioning part structure;

[0024] In the diagram: 1. Housing; 101. Through groove; 2. Chamber; 3. Movable plate; 4. Positioning part; 401. Positioning rod; 402. Horizontal plate; 403. Spring; 404. Sleeve; 5. Industrial camera; 6. Lighting lamp; 7. Base plate; 8. Gear; 9. Rack; 10. Positioning block; 11. Slide groove; 12. Servo electric cylinder; 13. Pressure plate. Detailed Implementation

[0025] The following is a detailed description of a detection device for an optical lens according to an embodiment of the present disclosure, with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present disclosure.

[0026] Therefore, the following detailed description of embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of the present disclosure.

[0027] The optical lens detection device in this embodiment is used in a cleanroom:

[0028] Please see Figure 3 It mainly includes a cuboid shell 1 made of aluminum profile. The interior of the shell 1 is divided into two chambers 2 by a partition. The two chambers 2 are optically and physically isolated from each other to avoid mutual interference. The front wall of the shell 1 has through slots 101 corresponding to the position of each chamber 2.

[0029] Please see Figure 1 The supporting component includes two sets of movable plates 3. One set of movable plates 3 corresponds to one set of chambers 2, and the other set of movable plates 3 corresponds to another set of chambers 2. The material of the movable plates 3 can be lightweight and high-strength polycarbonate, and a positioning part 4 is provided on them for positioning and placing optical lenses.

[0030] Please see Figure 2The drive core of the device is located on the base plate 7 at the lower front end of the housing 1. A gear 8 is rotatably mounted on the base plate 7 via bearings. The gear 8 is driven by a stepper motor (not shown in the figure) through a reducer. Two sets of movable plates 3 are respectively connected to racks 9, and the two racks 9 mesh with the gear 8. When the motor drives the gear 8 to rotate clockwise, one set of racks 9 moves to the left, driving the corresponding movable plate 3 into the chamber 2. At the same time, the other set of racks 9 moves to the right, driving the corresponding movable plate 3 out of the chamber 2, and vice versa. Through the staggered parallel working design of the double chamber 2 and the double movable plates 3, the seamless connection between the detection process and the loading and unloading operation is realized, the detection cycle is greatly shortened, the detection efficiency is high, and the loading and unloading operation is located outside the chamber 2, making the operation simple.

[0031] Please see Figure 3 Inside each chamber 2, a set of detection components is installed. A high-resolution industrial camera 5 is installed vertically downwards, with its lens facing the positioning part 4 on the lower movable plate 3. Below the positioning part 4, a ring-shaped LED light 6 is installed. The light from the LED light 6 will pass over the lens surface, but its main light path will not directly enter the camera lens, thus creating a dark field lighting environment. The use of dark field lighting technology can highlight small surface defects such as scratches and pits with high contrast.

[0032] Please see Figure 2 To ensure the accuracy of the movement, positioning blocks 10 are fixedly installed on both sides of the substrate 7. A groove 11 is machined on the side of each of the two racks 9. The positioning blocks 10 can slide in the groove 11. The length of the groove 11 is precisely designed, and its value is equal to the stroke that the movable plate 3 needs to move. At both ends of the groove 11, suction blocks made of neodymium iron boron strong magnets are embedded. When the rack 9 moves to the end of its stroke, the positioning block 10 made of non-magnetic material will be precisely aligned with the suction block and generate magnetic attraction, which firmly fixes the movable plate 3 in the detection position or loading / unloading position. The multi-positioning system consisting of gear 8 and rack 9 transmission, groove 11 limiting and magnetic attraction positioning ensures that the optical lens under test can be accurately and stably placed in the center of the field of view of the industrial camera 5 every time, providing physical guarantee for the stable analysis of the algorithm.

[0033] Please see Figure 4To prevent the optical lens from shifting when the movable plate 3 moves, the positioning part 4 includes multiple sets of positioning rods 401 that are movably mounted on the movable plate 3. The shape formed by the multiple sets of positioning rods 401 is consistent with the shape of the optical lens. The lower ends of the multiple sets of positioning rods 401 are connected to a horizontal plate 402. Each set of positioning rods 401 is wound with a spring 403. Each set of positioning rods 401 is fitted with a detachable and replaceable sleeve 404. The sleeve 404 is made of rubber material. By uniformly replacing the sleeve 404 with different outer diameters, different sizes of optical lenses can be adapted. This ensures the stability of the optical lens placement during the process of the movable plate 3 moving into and out of the chamber 2, preventing it from shifting or falling off.

[0034] Please see Figure 4 Each chamber 2 is equipped with a servo electric cylinder 12. The movable rod of the servo electric cylinder 12 is connected to a pressure plate 13. When the optical lens moves to the bottom of the industrial camera 5, before the industrial camera 5 takes a picture of the optical lens, the pressure plate 13 is located above the horizontal plate 402. The servo electric cylinder 12 drives the pressure plate 13 to press down the horizontal plate 402, which causes multiple sets of positioning rods 401 to retract downwards. This ensures that the positioning rods 401 and the sleeve 404 do not block the illumination lamp 6 from illuminating the optical lens, thus ensuring that defects on the surface of the optical lens can be exposed. Conversely, after the industrial camera 5 takes a picture of the optical lens, the servo electric cylinder 12 drives the pressure plate 13 to move upwards, causing multiple sets of positioning rods 401 to reset upwards and reposition the optical lens.

[0035] The entire system consists of a processing unit, which includes an industrial control computer with a high-performance CPU and an image processing card. The processing unit provides centralized control and can control the motor driving the gear 8 and the servo cylinder 12 driving the pressure plate 13. It can independently adjust the brightness and switch of the two lighting lamps 6 through the light source controller and receive image data from two industrial cameras 5. The detection results, as well as the type and location of defects, are displayed on the display of the processing unit and stored in the database. After the optical lens is inspected, when the movable plate 3 moves out of the chamber 2, the display will show the detection results. The operator will then cut the optical lens according to the detection results and place it in the position after inspection (pass position, defect position related to non-compliance). Multiple indicator lights are set at the position after inspection, and the corresponding indicator lights illuminate the detection results of the corresponding optical lens, which serves as a reminder to the operator.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection device for an optical lens, characterized in that, include: The shell has two sets of mutually isolated chambers, and each set of chambers has a through groove at its front end; The support assembly includes two sets of movable plates, each set of movable plates being slidably connected to a set of chambers. The two sets of movable plates alternately move into and out of the corresponding chambers, and each set of movable plates is provided with a positioning part for positioning and placing an optical lens. The detection components consist of two sets, each distributed within one of the chambers, and are used for automatic visual detection of optical lenses entering the chambers.

2. The detection device for an optical lens according to claim 1, characterized in that, The detection component includes an industrial camera and a lighting lamp, the lighting lamp being located below the industrial camera and used to generate dark field illumination.

3. The detection device for an optical lens according to claim 2, characterized in that, The detection component also includes a processing unit, which is electrically connected to the industrial camera and the lighting lamp, and the processing unit can independently turn the lighting lamp on, off, or adjust its brightness.

4. The detection device for an optical lens according to claim 1, characterized in that, The front end of the housing is connected to a base plate, and the base plate is rotatably connected to a gear. The two sets of movable plates are respectively connected to racks that mesh with the gears.

5. The detection device for an optical lens according to claim 4, characterized in that, The substrate is provided with two sets of positioning blocks. Each set of racks is connected to a sliding groove for the positioning blocks to slide into and engage. The sliding groove is used to limit the distance the movable plate moves into and out of the corresponding chamber.

6. The detection device for an optical lens according to claim 5, characterized in that, The two ends of the slide are respectively provided with suction blocks that can magnetically contact the positioning block.

7. The detection device for an optical lens according to claim 1, characterized in that, The positioning part includes multiple sets of positioning rods that are movably inserted through the movable plate. The shape formed by the multiple sets of positioning rods is consistent with the shape of the optical lens. The lower ends of the multiple sets of positioning rods are connected to a horizontal plate, and each set of positioning rods is wound with a spring.

8. The detection device for an optical lens according to claim 7, characterized in that, Each set of positioning rods is fitted with a detachable and replaceable sleeve, and multiple sets of sleeves are used to adapt to optical lenses of different sizes.

9. The detection device for an optical lens according to claim 8, characterized in that, Each of the chambers is equipped with a servo electric cylinder. The movable rod of the servo electric cylinder is connected to a pressure plate. The pressure plate can press down on the horizontal plate, causing multiple sets of positioning rods to retract into the movable plate.

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