Blue light protection lens detection device and detection method

Abstract

The present application relates to lens detection equipment technical field, specifically to a kind of anti-blue light lens detection device and detection method, including rack, the upper end of rack is set machine top plate, the middle part of rack is provided with workbench, the lower end surface of workbench is fixedly provided with mounting bracket, multiple connecting flanges are equipped on the outer side wall of mounting bracket;The present application is provided with multiple independent action hydraulic rod and four laser light sources, in the detection process, four laser light sources with the axis circumferential array setting of detection light source emit laser beam, the laser beam after passing through lens forms light spot on photosensitive unit, through the analysis and processing of light spot position information by control module, the position of lens optical center can be accurately judged, and the position of the lens to be detected is adjusted by multiple independent action hydraulic rod, so that detection light source can be perpendicular incidence through the optical center of lens, improve the accuracy of blue light blocking rate detection result.

Description

Technical Field

[0001] This invention relates to the field of lens testing equipment technology, specifically to a blue light blocking lens testing device and testing method. Background Technology

[0002] In the testing technology of blue light blocking rate of blue light blocking lenses, the common testing device usually adopts the spectral analysis method. The basic principle is: a light source emits broadband light, which passes through the lens under test, and the transmission spectrum is received and analyzed by a spectrometer. The blue light blocking rate is obtained by calculating the ratio of the lens transmittance to the blank transmittance in a specific wavelength band. However, those skilled in the art know that the measurement accuracy of this method heavily depends on a basic premise: the test light must be precisely and perpendicularly incident through the "central optical zone" of the lens.

[0003] The so-called "central optical zone" refers to the area on a lens with rotational symmetry that corresponds to the wearer's pupil. It is the "optical origin" where the lens has the smallest aberration, the most accurate refractive power, and no prismatic effect. For lenses with rotational symmetry, there is only one central optical zone. Only by measuring at this point can the results truly reflect the performance of the lens under normal wearing conditions. However, existing testing devices have the following technical defects that urgently need to be addressed in achieving this premise: A common error in blue light blocking lens testing devices is the use of simple mechanical positioning, that is, using the geometric center of the circular blank lens to approximate the optical center. This has no significant impact on the test results for uncut circular blank lenses from the original manufacturer. However, for lenses that have already been cut and configured, the optical center of the lens will deviate from the geometric center through a "centering" process during the cutting process to adapt to different pupillary distances and frames. This causes the method of positioning by the geometric center to completely fail on irregularly shaped lenses that have already been cut. When the optical center is offset from the detection light source, and the detection light source cannot be perpendicularly incident on the optical center, the change in the incident angle will significantly affect the optical path of light in the lens and the interference effect of the coating layer, thus causing a systematic deviation in the measurement value of blue light blocking rate. Moreover, this error is aggravated as the curvature of the lens increases.

[0004] To address this issue, the present invention proposes a blue light blocking lens detection device and detection method to fundamentally solve the problems of accurate positioning and perpendicular incidence of the central optical zone. Summary of the Invention

[0005] The purpose of this invention is to provide a blue light blocking lens detection device and detection method to solve the problem that existing blue light blocking lens detection devices fail to provide a reliable mechanism for automatically and accurately locating and locking the optical center of the lens with rotational symmetry to ensure that the detection light always enters the area perpendicularly. This defect directly leads to problems such as inaccurate measurement data, poor repeatability, and weak comparability, and cannot meet the industry's requirements for high-precision and standardized detection.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A blue light blocking lens testing device includes a frame, a top plate at the upper end of the frame, a worktable in the middle of the frame, and a mounting frame fixedly mounted on the lower end face of the worktable. Multiple connecting flanges are provided on the outer side wall of the mounting frame, and each of the connecting flanges has a through hole coaxially extending through the outer side of the connecting flange and the inner side of the mounting frame. A hydraulic cylinder is coaxially fixedly mounted on each connecting flange, and a hydraulic rod is coaxially slidably connected to each hydraulic cylinder. The hydraulic rod extends into the mounting frame, and a hinge seat is hinged to one end of the hydraulic rod extending into the mounting frame. The hinge seat is in contact with the outer side wall of the lens to be tested. The lower end of the top plate of the machine is equipped with a detection light source and four laser light sources. The four laser light sources are arranged in a circular array around the axis of the detection light source. The frame contains a control module, a photosensitive unit, and a hydraulic drive module. The hydraulic drive module is connected to multiple hydraulic cylinders through hydraulic pipes. The photosensitive unit is fixedly mounted on the inner bottom wall of the frame. The vertical projections of the mounting frame and the four laser light sources are all located within the photosensitive unit. The outer wall of the mounting frame is equipped with multiple support components for supporting the lens to be tested. The hydraulic drive module, support components, detection light source, and laser light sources are all electrically connected to the control module.

[0007] This invention utilizes multiple independently operating hydraulic rods and four laser light sources. During lens clamping, the four laser light sources operate, emitting four laser beams downwards. These beams enter the lens, undergoing refraction upon entry. After passing through the lens, the beams are projected onto the photosensitive unit. The control module obtains the refractive index of the four laser beams entering the lens by reading the positions of four light spots on the photosensitive unit. When the four laser light sources emit vertically downward laser beams, the following three scenarios exist: In the ideal case where there are no mirrors between the laser light source and the photosensitive unit: the laser beams emitted by the four laser light sources are directly incident on the photosensitive unit, forming four light spots. Since the four laser light sources are arranged in a circular array around the axis of the detection light source, the line connecting these four light spots forms a square. At this time, the center of the square is the vertical projection of the detection light source directly incident on the photosensitive unit.

[0008] When a lens is placed between the laser source and the photosensitive unit, a deflection is introduced: When the lens is placed in the optical path but not aligned, at least three of the four laser beams emitted from the four circular array laser sources will be refracted when passing through the lens. This will cause the four light spots formed on the photosensitive unit by the four laser beams after passing through the lens to be translated, rotated, or deformed as a whole, no longer forming the original square. At this time, the control module can obtain the optical center of the lens under test by reading the position information of the four light spots and processing the data. This will show that the optical center of the lens under test is not directly below the detection source. If the blue light blocking rate of the lens under test is measured at this time, the detection result will be inaccurate.

[0009] When the lens is aligned with its optical center: When the position and angle of the lens are adjusted until the line connecting the four light points returns to a square, it means that all four rays have been deflected with equal refractive index. For lenses with rotational symmetry (including spherical and aspherical lenses), the center of the circumcircle of the square formed by the four light points is the optical center. Since the four laser light sources are arranged in a circular array around the axis of the detection light source, it is ensured that the detection light emitted vertically downwards from the detection light source can pass perpendicularly through the optical center of the lens. At this time, the blue light blocking rate of the lens under test is more accurately measured.

[0010] Preferably, the support assembly includes a servo motor, a rocker arm, and a column. The lower end of the side wall of the mounting bracket is provided with multiple clearance slots, which do not penetrate the upper end of the mounting bracket. A servo motor is fixedly installed on each side wall with a clearance slot. The rocker arm is fixedly installed to the output shaft of the servo motor. The upper and lower dead points of the servo motor are respectively the horizontal and vertically downward states of the rocker arm. The column is located at the end of the rocker arm away from the servo motor, on the upper end face of the rocker arm, and the column and the rocker arm form an L-shape.

[0011] By configuring servo motors, rocker arms, and columns, when the lens to be tested is placed into the testing device, the control module drives the servo motors, which in turn drive the rocker arms to the top dead center. At this point, the rocker arms are horizontal, and the multiple columns are vertically upward. The lens to be tested can be placed on top of the columns, thus providing support for the lens. When testing the blue light blocking rate of the lens, the control module drives the servo motors, which in turn drive the rocker arms to the bottom dead center. At this point, the rocker arms are vertical, and the multiple rocker arms are disengaged from the vertical projection plane of the lens to be tested, thus preventing the rocker arms from affecting the testing results and ensuring the accuracy of the testing results.

[0012] Furthermore, after placing the lens under test on multiple pillars, if the lens is not aligned with the optical center, the control module first receives the position information of the four light spots formed by the four laser light sources on the photosensitive unit. After data processing, the control module first controls multiple hydraulic rods to release the contact between the hinge seat and the lens under test. At this time, the lens can be displaced in the horizontal direction. The upper ends of the multiple pillars are in contact with the lower end surface of the lens under test, supporting the lens. The control module controls one of the hydraulic rods to push the lens to one side by a set displacement. During the displacement of the lens under test, the upper ends of at least three pillars remain in contact with the lower end surface of the lens under test, thus supporting the lens and allowing the lens to rotate in the vertical direction. Thus, when the hydraulic rods adjust the horizontal position of the lens under test, the tilt angle of the lens under test is adjusted simultaneously. This avoids the problem that the detection light emitted by the detection light source cannot pass through the lens vertically if the tilt angle of the detection lens does not change after the position adjustment of the lens under test is completed, thereby further ensuring the accuracy of the detection results of the lens under test.

[0013] Preferably, the upper end of the column is provided with a contact, the upper end of the contact is spherical, and the contact is made of any one of the flexible materials selected from silicone, polytetrafluoroethylene or flexible polyurethane.

[0014] By incorporating a ball-shaped contact tip on the column, when the lens to be tested is placed on the column, the spherical upper end of the contact tip contacts the lower surface of the lens. The contact tip, made of flexible material, can deform to a certain extent according to the shape of the lower surface of the lens, better conforming to the lens surface, increasing the contact area, reducing localized stress concentration, and preventing damage to the lens due to insufficient contact area. Simultaneously, this flexible contact tip provides smoother support when the lens undergoes slight rotational displacement, ensuring that the lens can rotate flexibly during position and angle adjustments. This further ensures that the detection light emitted by the detection light source passes perpendicularly through the lens, improving the accuracy of the detection results.

[0015] Preferably, a rubber pad is fixedly provided on the side wall of the hinge seat away from the hydraulic rod, and the side wall of the rubber pad away from the hydraulic rod is an arc-shaped surface, the vertical projection surface of the arc-shaped surface is arc-shaped.

[0016] By setting a rubber pad on the hinge seat and setting an arc-shaped surface on the rubber pad, when the hydraulic rod drives the hinge seat to contact the lens to be tested, the rubber pad undergoes elastic deformation. The two sides of the rubber pad remain in contact with the side wall of the lens to be tested. The arc-shaped surface of the rubber pad can better fit the outer side wall of the lens to be tested with different outer wall shapes. This not only increases the contact area and further improves the stability and reliability of clamping, but also the flexible material of the rubber pad can play a buffering role, avoiding damage to the lens due to excessive clamping force.

[0017] Preferably, the rubber pad has a plurality of deformation holes, which penetrate the upper and lower sides of the rubber pad and are arranged in a circumferential array along the axis of the arc-shaped surface of the rubber pad.

[0018] By incorporating multiple deformation holes in the rubber pad, when the hydraulic rod moves the hinge seat close to the lens under test, the rubber pad is compressed. The deformation holes deform in response to this compression, allowing the rubber pad to distribute stress more evenly under pressure. This prevents localized stress concentration that could lead to excessive wear or damage to the rubber pad. Furthermore, the deformation of the holes increases the compression of the rubber pad, resulting in a better fit between the rubber pad and the sidewall of the lens under test. This allows the rubber pad to better adapt to lens surfaces of different shapes and curvatures, further improving the clamping fit and stability. The deformation holes also amplify the compressible deformation of the rubber pad, thereby reducing its elastic potential energy and the magnitude of the interaction force between the two opposing rubber pads. This prevents unwanted displacement or deformation of the lens due to excessive interaction force during clamping, ensuring the stability of the lens and the accuracy of the test results.

[0019] Preferably, a support sleeve is coaxially arranged inside the through hole, and both the inner and outer walls of the support sleeve are wavy. The crest of the outer wall of the support sleeve fits against the inner wall of the through hole, and the outer wall of the hydraulic rod is slidably connected to the trough of the inner wall of the support sleeve.

[0020] By installing a support sleeve inside the through hole, the inner and outer walls of the support sleeve are designed with a corrugated shape. This design allows for the application of preload, ensuring an interference fit between the support sleeve, the through hole, and the hydraulic rod. This results in a tighter and more stable connection between the support sleeve, the through hole, and the hydraulic rod. When the hydraulic rod slides within the support sleeve, the corrugated inner wall effectively guides its movement, reducing offset and wobbling during sliding. This ensures precise and smooth extension and retraction, maintaining high clamping accuracy over long-term use and thus guaranteeing the detection accuracy of the testing device. Simultaneously, the sliding connection between the outer wall of the hydraulic rod and the trough of the inner wall of the support sleeve reduces friction between the support sleeve and the through hole.

[0021] Preferably, the frame is provided with a light-transmitting plate, which is colorless and flat, and is located between the mounting frame and the photosensitive unit, and is parallel to the photosensitive unit.

[0022] By placing a light-transmitting plate between the mounting bracket and the photosensitive unit, a stable and interference-free medium environment is provided for the propagation of the laser beam and the detection light. The colorless and flat light-transmitting plate does not cause dispersion or refraction deviations in the laser beam and the detection light, ensuring that the laser beam maintains its original propagation direction and characteristics after passing through the plate. The detection light is also accurately projected onto the photosensitive unit, resulting in more accurate and reliable data such as the light spot position received by the control module. This leads to more precise calculations of the lens optical center position and blue light blocking rate, effectively improving the overall detection performance and reliability of the device. Simultaneously, the light-transmitting plate also provides some protection, preventing dust and debris from falling into the photosensitive unit, protecting its normal operation and extending its lifespan.

[0023] A method for detecting the blue light blocking rate of a blue light blocking lens, wherein the method uses the aforementioned blue light blocking lens detection device to detect the blue light blocking rate of the blue light blocking lens, and the specific steps are as follows: S1. Preparation before testing: The control module controls the servo motor to drive the rocker arm to rotate to the upper dead point, and the control module controls the hydraulic drive module to drive the hydraulic rod to retract to the shortest length extending out of the hydraulic cylinder; S2. Placement of the lens: The operator places the lens to be tested on the upper part of multiple contacts; S3. Lens Positioning: The control module controls the hydraulic drive module to extend the hydraulic rods until multiple rubber pads are in contact with the sidewalls of the lens to be tested. At this time, the hydraulic rods do not apply clamping force to the lens to be tested. The control module controls four laser light sources to work. The four laser beams pass through the lens to be tested and irradiate the photosensitive unit. When the pattern formed by the four light spots on the photosensitive unit is not a square, the control module drives each hydraulic rod to extend into the mounting bracket by the length of the hydraulic drive module until the pattern formed by the four light spots on the photosensitive unit is a square, thus completing the lens adjustment.

[0024] S4. Lens clamping: After the lens adjustment is completed, the control module controls the hydraulic drive module to drive multiple hydraulic rods to apply clamping force to the lens to be tested; S5. Lens position re-inspection: The control module re-reads the position of the four light points. When the four light points form a square, the control module shuts off the four laser light sources. The control module controls the servo motor to rotate the rocker arm to the lower stop point. If the four light points form a non-square, repeat S3 and S4 until the four light points form a square. S6. Blue light blocking rate detection of the lens: The control module controls the detection light source to work. The detection light passes through the lens to be tested and illuminates the photosensitive unit. The control module reads the result of the photosensitive unit and calculates the blue light blocking rate. S7. Lens Removal: The control module shuts off the detection light source, controls the servo motor to rotate the rocker arm to the top dead center, and controls the hydraulic drive module to retract the hydraulic rod to its shortest length outside the hydraulic cylinder, thus removing the lens that has completed the detection.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses multiple independently operating hydraulic rods and four laser light sources. During the detection process, the four laser light sources, arranged in a circular array around the axis of the detection light source, emit laser beams. After passing through the lens, the emitted laser beams form light spots on the photosensitive unit. By analyzing and processing the position information of the light spots through the control module, the position of the optical center of the lens can be accurately determined. The position of the lens to be tested is adjusted by the multiple independently operating hydraulic rods, so that the detection light source can be perpendicularly incident through the optical center of the lens, thereby improving the accuracy of the blue light blocking rate detection results.

[0026] 2. This invention, by setting up a rocker arm and column driven by a servo motor, ensures that at least three contacts remain in contact with the lower end face of the lens under test during position adjustment, providing stable support while allowing vertical rotational displacement. This allows the tilt angle of the lens to be adjusted simultaneously when the hydraulic rod adjusts its horizontal position, preventing the detection light emitted by the detection light source from failing to pass perpendicularly through the lens after position adjustment, thus further ensuring the accuracy of the detection results.

[0027] 3. This invention incorporates a rubber pad with deformation holes on the hydraulic rod. The design of the deformation holes amplifies the compression deformation of the rubber pad, resulting in a higher degree of contact between the rubber pad and the sidewall of the lens to be tested. This allows for better adaptation to lens surfaces of different shapes and curvatures, further enhancing the stability and fit of the clamping. Furthermore, it reduces the elastic potential energy of the rubber pad, thereby decreasing the interaction force between the two opposing rubber pads. This prevents excessive interaction force between the opposing rubber pads from causing undesirable displacement or deformation of the lens, thus ensuring the stability of the lens during testing and improving the accuracy of the test results. Attached Figure Description

[0028] Figure 1 This is an isometric view of the blue light blocking lens detection device of the present invention; Figure 2 This is a structural diagram of the detection light source and laser light source in the blue light blocking lens detection device of the present invention; Figure 3 This is a schematic diagram of the internal structure of the blue light blocking lens detection device of the present invention; Figure 4This is an axonometric view of the structure used to hold the lens to be tested in the blue light blocking lens testing device of the present invention; Figure 5 This is a top view of the structure used to hold the lens to be tested in the blue light blocking lens testing device of the present invention; Figure 6 for Figure 5 Full sectional view at point AA; Figure 7 for Figure 5 Full sectional view at point BB; Figure 8 for Figure 5 A magnified view of a section at point C; Figure 9 Axonometric view of the structure for holding irregularly shaped cut lenses in a blue light blocking lens testing device; Figure 10 A top view of the structure holding the lens to be tested in the blue light blocking lens testing device, showing the irregularly cut lens. Figure 11 for Figure 10 Full sectional view at point DD; Figure 12 for Figure 10 Full sectional view at EE; Figure 13 This is a schematic diagram of the support sleeve in the blue light blocking lens detection device of the present invention; Figure 14 The present invention relates to a blue light blocking lens testing device and a testing method for detecting the blue light blocking rate of blue light blocking lenses.

[0029] In the diagram: 1. Frame; 101. Top plate; 102. Worktable; 2. Detection light source; 3. Laser light source; 4. Control module; 5. Photosensitive unit; 6. Mounting bracket; 601. Through hole; 602. Connecting flange; 603. Clearance groove; 7. Hydraulic drive module; 8. Hydraulic cylinder; 9. Hydraulic rod; 10. Hinge seat; 11. Rubber pad; 1101. Deformation hole; 12. Support sleeve; 13. Servo motor; 14. Rocker arm; 15. Column; 16. Contact; 17. Circular blank lens; 1701. First optical center; 18. Irregularly shaped cut lens; 1801. Second optical center; 19. Light-transmitting plate. Detailed Implementation

[0030] Please see Figures 1 to 14 This invention provides a blue light blocking lens detection device and detection method, the technical solution of which is as follows: Please refer to the blue light blocking lens detection device. Figures 1 to 7 , Figure 13The system includes a frame 1, a top plate 101 at the top of the frame 1, a workbench 102 in the middle of the frame 1, and a mounting frame 6 fixedly mounted on the lower end of the workbench 102. Four connecting flanges 602 are provided on the outer wall of the mounting frame 6. Each connecting flange 602 has a through hole 601 coaxially arranged through the outer side of the connecting flange 602 and the inner side of the mounting frame 6. A hydraulic cylinder 8 is coaxially fixedly mounted on the connecting flange 602. A hydraulic rod 9 is coaxially slidably connected to the hydraulic cylinder 8. The hydraulic rod 9 extends into the mounting frame 6, and a hinge seat 10 is hinged to one end of the hydraulic rod 9 extending into the mounting frame 6. A rubber pad 11 is fixedly mounted on the side of the hinge seat 10 away from the hydraulic rod 9. 1. The side wall away from the hydraulic rod 9 is an arc-shaped surface, and the vertical projection of the arc-shaped surface is arc-shaped; the rubber pad 11 is provided with multiple deformation holes 1101, which penetrate the upper and lower sides of the rubber pad 11 and are arranged in a circumferential array along the axis of the arc-shaped surface on the rubber pad 11. A support sleeve 12 is coaxially arranged inside the hole 601. The inner and outer walls of the support sleeve 12 are both wavy. The crest of the outer wall of the support sleeve 12 fits against the inner wall of the hole 601, and the outer wall of the hydraulic rod 9 is slidably connected to the trough of the inner wall of the support sleeve 12; the lower end of the top plate 101 is provided with a detection light source 2 and four laser light sources 3. The four laser light sources 3 are used to detect the light source 2. The frame 1 is arranged in a circular array along its axis. The frame 1 contains a control module 4, a photosensitive unit 5, and a hydraulic drive module 7. The hydraulic drive module 7 is connected to multiple hydraulic cylinders 8 via hydraulic pipes. The photosensitive unit 5 is fixedly mounted on the inner bottom wall of the frame 1. The vertical projections of the mounting frame 6 and the four laser light sources 3 are all located within the photosensitive unit 5. The outer wall of the mounting frame 6 has four support components, including a servo motor 13, a rocker arm 14, and a column 15. The lower end of the side wall of the mounting frame 6 has four clearance slots 603, which do not penetrate the upper end of the mounting frame 6. A servo motor 13 is fixedly mounted on each side wall with a clearance slot 603. The rocker arm 14 is fixed to the output shaft of the servo motor 13. The servo motor 13 has its upper and lower stops at the horizontal and vertically downward positions of the rocker arm 14, respectively. The column 15 is located at the end of the rocker arm 14 away from the servo motor 13. The column 15 is located on the upper surface of the rocker arm 14 and forms an L-shape with the rocker arm 14. The upper end of the column 15 is provided with a contact 16, which is spherical and made of polytetrafluoroethylene. The hydraulic drive module 7, support components, detection light source 2, and laser light source 3 are all electrically connected to the control module 4. The frame 1 also has a light-transmitting plate 19, which is colorless and flat. The light-transmitting plate 19 is located between the mounting frame 6 and the photosensitive unit 5 and is parallel to the photosensitive unit 5.

[0031] As a specific embodiment of the present invention, please refer to Figures 1 to 8 , Figure 14The above-mentioned blue light blocking lens testing device is used to test the blue light blocking rate of a circular blank lens 17. This testing method is used for quality inspection in lens factories and for lens testing before cutting at eyewear sales outlets. It should be noted that in this specific embodiment, optical center 1701 is set as the optical center point of the circular blank lens 17. The specific testing steps are as follows: Before testing, control module 4 first controls the servo motor 13 to rotate the rocker arm 14 to the top dead center position, ensuring that the column 15 and contact 16 are at the appropriate height to provide space for subsequent lens placement. At the same time, control module 4 controls the hydraulic drive module 7 to retract the hydraulic rod 9 to its shortest extension beyond the hydraulic cylinder 8, placing the rubber pad 11 away from the center of the mounting bracket 6 to avoid obstructing lens placement.

[0032] During the lens placement process, the operator smoothly places the circular blank lens 17 on top of multiple contacts 16. Since the upper end of the contacts 16 is spherical and made of polytetrafluoroethylene (PTFE), which has self-lubricating properties, it can reduce friction between the contacts and the lens. At the same time, the spherical design can better fit the lower surface of the lens, ensuring the stability of the lens placement.

[0033] After the lens is placed, the lens positioning step begins. Control module 4 controls hydraulic drive module 7 to extend hydraulic rods 9 until multiple rubber pads 11 are in contact with the sidewalls of the circular blank lens 17, but at this point, the hydraulic rods 9 do not apply clamping force to the lens. Subsequently, control module 4 controls four laser light sources 3 to operate, and four laser beams pass through the circular blank lens 17 and illuminate the photosensitive unit 5. If the pattern formed by the four light spots on the photosensitive unit 5 is not a square, control module 4 drives each hydraulic rod 9 to extend into the mounting bracket 6 by the length of the hydraulic drive module 7, adjusting the lens position. During the adjustment process, since at least three contacts 16 remain in contact with the lower end face of the circular blank lens 17, providing stable support for the lens, and allowing the lens to rotate vertically, the tilt angle of the lens can be adjusted simultaneously when the hydraulic rods 9 adjust the lens horizontally, until the pattern formed by the four light spots on the photosensitive unit 5 becomes a square, completing the lens adjustment. At this point, the first optical center 1701 on the circular blank lens 17 is at the top.

[0034] Next, the lens is clamped. The control module 4 controls the hydraulic drive module 7 to drive multiple hydraulic rods 9 to apply a suitable clamping force to the circular blank lens 17. At this time, the deformation holes 1101 on the rubber pad 11 play a role. After being squeezed, they deform, which makes the rubber pad 11 distribute stress more evenly, avoids local stress concentration, and increases the fit between the rubber pad 11 and the side wall of the lens, better adapting to the surface shape of the lens. At the same time, it reduces the elastic potential energy of the rubber pad 11, reduces the interaction force between the two rubber pads 11 that are set opposite each other, and prevents the lens from undergoing undesirable displacement or deformation.

[0035] Next, the lens position is rechecked. Control module 4 rereads the positions of the four light spots. If the four light spots form a square, the lens position is accurate. Control module 4 shuts down the four laser light sources 3 and controls the servo motor 13 to rotate the rocker arm 14 to the lower stop point, causing the column 15 and contact 16 to descend, avoiding interference with subsequent inspections. If the four light spots do not form a square, the lens positioning and clamping steps are repeated until the four light spots form a square during the re-inspection.

[0036] After the lens is accurately positioned, the blue light blocking rate of the lens is tested. The control module 4 controls the detection light source 2 to work. The detection light passes through the circular blank lens 17 and illuminates the photosensitive unit 5. The control module 4 reads the result from the photosensitive unit 5 and calculates the blue light blocking rate according to the preset algorithm.

[0037] Finally, the lens removal step is performed. The control module 4 turns off the detection light source 2 and controls the servo motor 13 to rotate the rocker arm 14 to the upper stop point, so that the column 15 and the contact 16 rise to a suitable height. At the same time, the control module 4 controls the hydraulic drive module 7 to drive the hydraulic rod 9 to retract to the shortest length outside the hydraulic cylinder 8, so that the operator can take out the circular blank lens 17 that has completed the inspection.

[0038] As another specific embodiment of the present invention, please refer to Figure 2 , Figures 9 to 12 , Figure 14 The above-mentioned blue light blocking lens testing device is used to test the blue light blocking rate of the irregularly cut lens 18. This testing method is used by third-party testing institutions and eyewear retailers to test lenses after cutting. It should be noted that in this specific embodiment, the second optical center 1801 is set as the optical center point of the irregularly cut lens 18. The specific testing steps are as follows: Before testing, the control module 4 first sends a command to the servo motor 13, causing it to operate and rotate the rocker arm 14 to the top dead center position. At this point, the column 15 and the contact 16 are in a higher position, leaving sufficient space for placing the irregularly shaped cut lens. At the same time, the control module 4 controls the hydraulic drive module 7 to retract the hydraulic rod 9 to its shortest extension beyond the hydraulic cylinder 8, so that the rubber pad 11 is away from the center of the mounting bracket 6, preventing obstruction to the placement of the lens.

[0039] During the lens placement process, the operator places the irregularly shaped cut lens 18 on the upper end of multiple contacts 16. Since the upper end of the contacts 16 is spherical and made of self-lubricating polytetrafluoroethylene, it can minimize the friction between the contacts and the lens. Furthermore, the spherical design can better fit the irregular lower end surface of the irregularly shaped cut lens 18, ensuring the stability of the lens placement.

[0040] After the lens is placed, the lens positioning step begins. Control module 4 controls hydraulic drive module 7 to extend hydraulic rods 9 until multiple rubber pads 11 are in contact with the sidewalls of the irregularly shaped lens 18, but at this point, the hydraulic rods 9 do not apply clamping force to the lens. Subsequently, control module 4 controls four laser light sources 3 to operate, and four laser beams pass through the irregularly shaped lens 18 and illuminate the photosensitive unit 5. If the pattern formed by the four light spots on the photosensitive unit 5 is not a square, control module 4 drives each hydraulic rod 9 to extend into the mounting bracket 6 by the length of hydraulic drive module 7, adjusting the lens position. During the adjustment process, at least three contacts 16 remain in contact with the lower end face of the irregularly shaped lens 18, providing stable support for the lens and allowing the lens to rotate vertically. Thus, when the hydraulic rods 9 adjust the lens horizontally, the tilt angle of the lens can be adjusted simultaneously until the pattern formed by the four light spots on the photosensitive unit 5 becomes a square, completing the lens adjustment. At this point, the second optical center 1801 is located at the top of the irregularly shaped lens 18.

[0041] Next, the lens is clamped. The control module 4 controls the hydraulic drive module 7 to drive multiple hydraulic rods 9 to apply a suitable clamping force to the irregularly cut lens 18. At this time, the deformation holes 1101 on the rubber pad 11 play a role. After being squeezed, they deform, which makes the rubber pad 11 distribute stress more evenly, avoids local stress concentration, and increases the fit between the rubber pad 11 and the side wall of the lens, better adapting to the complex surface shape of the irregularly cut lens 18. At the same time, it reduces the elastic potential energy of the rubber pad 11, reduces the interaction force between the two rubber pads 11 that are set opposite each other, and prevents the lens from undergoing undesirable displacement or deformation.

[0042] Next, the lens position is rechecked. Control module 4 rereads the positions of the four light spots. If the four light spots form a square, the lens position is accurate. Control module 4 shuts down the four laser light sources 3 and controls the servo motor 13 to rotate the rocker arm 14 to the lower stop point, causing the column 15 and contact 16 to descend, avoiding interference with subsequent inspections. If the four light spots do not form a square, the lens positioning and clamping steps are repeated until the four light spots form a square during the re-inspection.

[0043] After the lens is accurately positioned, the blue light blocking rate of the lens is tested. The control module 4 controls the detection light source 2 to work. The detection light passes through the irregularly shaped cut lens 18 and shines on the photosensitive unit 5. The control module 4 reads the result from the photosensitive unit 5 and calculates the blue light blocking rate according to the preset algorithm.

[0044] Finally, the lens removal step is performed. The control module 4 turns off the detection light source 2 and controls the servo motor 13 to rotate the rocker arm 14 to the upper stop point, so that the column 15 and the contact 16 rise to a suitable height. At the same time, the control module 4 controls the hydraulic drive module 7 to drive the hydraulic rod 9 to retract to the shortest length outside the hydraulic cylinder 8, so that the operator can take out the irregularly cut lens 18 that has been inspected.

[0045] The two specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A blue light blocking lens detection device, comprising a frame (1), wherein a top plate (101) is provided at the upper end of the frame (1), and a worktable (102) is provided in the middle of the frame (1), characterized in that, A mounting bracket (6) is fixedly installed on the lower end face of the workbench (102). Multiple connecting flanges (602) are provided on the outer wall of the mounting bracket (6). Each of the multiple connecting flanges (602) has a through hole (601) coaxially extending through the outer side of the connecting flange (602) and the inner side of the mounting bracket (6). A hydraulic cylinder (8) is coaxially fixedly installed on the connecting flange (602). A hydraulic rod (9) is coaxially slidably connected to the hydraulic cylinder (8). The hydraulic rod (9) extends into the mounting bracket (6). One end of the hydraulic rod extending into the mounting bracket (6) is hinged to a hinge seat (10). The hinge seat (10) is in contact with the outer wall of the lens to be inspected. A detection light source (2) and a... are provided at the lower end of the top plate (101). Four laser light sources (3) are arranged in a circular array around the axis of the detection light source (2). The frame (1) is equipped with a control module (4), a photosensitive unit (5) and a hydraulic drive module (7). The hydraulic drive module (7) is connected to multiple hydraulic cylinders (8) through hydraulic pipes. The photosensitive unit (5) is fixedly installed on the inner bottom wall of the frame (1). The vertical projections of the mounting frame (6) and the four laser light sources (3) are all located inside the photosensitive unit (5). The outer wall of the mounting frame (6) is provided with multiple support components. The support components are used to support the lens to be tested. The hydraulic drive module (7), support components, detection light source (2) and laser light source (3) are all electrically connected to the control module (4).

2. The blue light blocking lens detection device according to claim 1, characterized in that, The support assembly includes a servo motor (13), a rocker arm (14), and a column (15). The lower end of the side wall of the mounting bracket (6) is provided with multiple clearance slots (603). The clearance slots (603) do not penetrate the upper end of the mounting bracket (6). A servo motor (13) is fixedly installed on each side wall with the clearance slot (603). The rocker arm (14) is fixedly installed with the output shaft of the servo motor (13). The upper and lower stops of the servo motor (13) are respectively the horizontal state and the vertical downward state of the rocker arm (14). The column (15) is located at the end of the rocker arm (14) away from the servo motor (13). The column (15) is located on the upper end face of the rocker arm (14), and the column (15) and the rocker arm (14) are L-shaped.

3. The blue light blocking lens detection device according to claim 2, characterized in that, The upper end of the column (15) is provided with a contact (16), the upper end of the contact (16) is spherical, and the contact (16) is made of any one of the flexible materials selected from silicone, polytetrafluoroethylene or flexible polyurethane.

4. The blue light blocking lens detection device according to claim 1, characterized in that, A rubber pad (11) is fixedly installed on the side wall of the hinge seat (10) away from the hydraulic rod (9). The side wall of the rubber pad (11) away from the hydraulic rod (9) is an arc-shaped surface, and the vertical projection surface of the arc-shaped surface is arc-shaped.

5. The blue light blocking lens detection device according to claim 4, characterized in that, The rubber pad (11) is provided with a plurality of deformation holes (1101), which penetrate the upper and lower sides of the rubber pad (11) and are arranged in a circular array along the axis of the arc surface on the rubber pad (11).

6. The blue light blocking lens detection device according to claim 1, characterized in that, A support sleeve (12) is coaxially arranged inside the through hole (601). The inner and outer walls of the support sleeve (12) are both wavy. The crest of the outer wall of the support sleeve (12) fits against the inner wall of the through hole (601). The outer wall of the hydraulic rod (9) is slidably connected to the trough of the inner wall of the support sleeve (12).

7. The blue light blocking lens detection device according to claim 1, characterized in that, The frame (1) is provided with a light-transmitting plate (19), which is colorless and flat. The light-transmitting plate (19) is located between the mounting frame (6) and the photosensitive unit (5), and the light-transmitting plate (19) is parallel to the photosensitive unit (5).

8. A method for detecting the blue light blocking rate of a blue light blocking lens, characterized in that, This method utilizes at least the blue light blocking lens detection device described in any one of claims 1 to 7, and the specific steps are as follows: S1. Preparation before testing: The control module (4) controls the servo motor (13) to drive the rocker arm (14) to rotate to the upper dead point. The control module (4) controls the hydraulic drive module (7) to drive the hydraulic rod (9) to retract to the shortest length outside the hydraulic cylinder (8). S2, Placement of the lens: The operator places the lens to be tested on the upper end of multiple contacts (16); S3. Lens positioning: The control module (4) controls the hydraulic drive module (7) to drive the hydraulic rod (9) to extend until multiple rubber pads (11) are in contact with the side wall of the lens to be tested. At this time, the hydraulic rod (9) does not apply clamping force to the lens to be tested. The control module (4) controls the four laser light sources (3) to work. The four laser beams pass through the lens to be tested and irradiate the photosensitive unit (5). When the pattern formed by the four light spots on the photosensitive unit (5) is not a square, the control module (4) drives each hydraulic rod (9) to extend into the mounting bracket (6) by the hydraulic drive module (7) until the pattern formed by the four light spots on the photosensitive unit (5) is a square, thus completing the lens adjustment. S4. Clamping of the lens: After the lens adjustment is completed, the control module (4) controls the hydraulic drive module (7) to drive multiple hydraulic rods (9) to apply clamping force to the lens to be tested; S5. Lens position re-inspection: The control module (4) re-reads the position of the four light points. When the four light points form a square, the control module (4) shuts down the four laser light sources (3). The control module (4) controls the servo motor (13) to rotate the rocker arm (14) to the lower stop point. If the four light points form a non-square, repeat S3 and S4 until the four light points form a square. S6. Blue light blocking rate detection of lens: The control module (4) controls the detection light source (2) to work. The detection light passes through the lens to be tested and shines on the photosensitive unit (5). The control module (4) reads the result of the photosensitive unit (5) and calculates the blue light blocking rate. S7. Lens Removal: The control module (4) turns off the detection light source (2), the control module (4) controls the servo motor (13) to drive the rocker arm (14) to rotate to the upper dead point, the control module (4) controls the hydraulic drive module (7) to drive the hydraulic rod (9) to retract to the shortest length outside the hydraulic cylinder (8), and remove the lens that has completed the detection.

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