Optical lens precision detection device

Abstract

The invention discloses an optical lens precision detection device, and belongs to the technical field of lens detection. Comprising a detection table, and a placement hole is formed in the inner side of the detection table; the supporting assembly is arranged at the bottom of the detection table corresponding to the placing hole and is used for horizontally supporting the to-be-detected lens; the annular light source assembly is arranged at the top of the detection table corresponding to the placing hole and is used for performing dark field illumination on the to-be-detected lens at a low incident angle; according to the invention, the uniformly arranged piezoelectric ceramic actuators are adopted to support the to-be-detected lens, and the flexible plunger heads at the tops of the piezoelectric ceramic actuators are subjected to micron-order adjustment according to the pressure detection signals, so that the pressure values of a plurality of fulcrums are equal, and the feedback adjustment of the levelness of the to-be-detected lens is realized; the problem that the levelness of the to-be-detected lens is difficult to guarantee during detection is solved, and the levelness of the to-be-detected lens is adjusted conveniently.

Description

Optical lens precision testing device Technical Field

[0001] This application relates to the field of lens inspection technology, and more specifically, to an optical lens precision inspection device. Background Technology

[0002] Precision testing of optical lenses is a key step in ensuring the performance of optical systems. Submicron-level surface defects or parameter deviations can lead to problems such as blurred images and chromatic aberration, directly affecting the imaging quality of devices such as cameras and microscopes. In related technologies, to facilitate the gripping of optical lenses during inspection and position the lens to be tested at the inspection station, for example, patent CN116817773A provides a precision inspection device for optical lenses. In this device, the lens transport device is positioned above an assembly base plate, and an extension plate is provided on the side of the assembly base plate. A laser and a scanner are mounted on the extension plate. When the gripping assembly adsorbs the lens, the drive unit drives the support plate to slide the gripping assembly above the extension plate. The laser emits a light source to the scanner, which then emits interference fringes onto the lens. The detector receives the interference fringes from the lens and converts the light signal into an electrical signal through a photoelectric converter inside the detector. The electrical signal is then transmitted to a computer for processing and calculation to determine the height distribution map of the optical lens surface, analyzing the lens's precision parameters. This allows for precision inspection of the lens while it is being transported, improving the efficiency of lens inspection due to the inability to continuously transport lenses after inspection.

[0003] While the existing technical solutions described above can achieve the effect of detecting the accuracy of the lens during the handling process by directly moving it above the scanner after it is adsorbed by the gripping component, the gripping component relies on multiple soft adsorption nozzles of the adsorption component to adsorb the lens. When the lens is above the scanner, it is difficult to correct the level of the lens. If there is a deviation in level, it will cause an overall change in the density or direction of the interference fringes. When calculating the height distribution map, this phase change introduced by the tilt will be incorrectly calculated as the height slope of the lens surface (wedge angle error), resulting in distortion of the surface data. Consequently, it is difficult to guarantee the level of the lens under test during the inspection.

[0004] In view of this, we propose an optical lens accuracy testing device. Summary of the Invention

[0005] The purpose of this application is to provide an optical lens accuracy testing device, which solves the technical problem of difficulty in ensuring the level of the lens under test during testing, and achieves the technical effect of easy adjustment of the level of the lens under test.

[0006] This application provides an optical lens accuracy testing device, including: a testing stage; a support assembly including multiple uniformly arranged piezoelectric ceramic actuators, each of which has a flexible plunger head at its actuation end, and a miniature pressure sensor at the bottom end of the flexible plunger head; in the working state, the support assembly provides horizontal support for the lens under test; a ring light source assembly disposed on one side of the testing stage, which illuminates the lens under test with a low incident angle in the working state; and a collection hood, which is hemispherical and disposed above the ring light source assembly in the working state, with several photodiodes embedded in the inner wall of the collection hood.

[0007] As an optional solution, a placement hole is provided on the inner side of the testing station. In the working state, the lens to be tested is placed in the placement hole; there are two placement holes to form a dual-station setup.

[0008] As an optional solution, the support assembly further includes: a carrier, disposed on the top of the testing table; adjusting wheels, which are synchronous gears, with multiple adjusting wheels corresponding to the piezoelectric ceramic actuators, all of which are rotatably disposed on the top of the carrier; adjusting blocks, which are racks, meshed on one side of the corresponding adjusting wheel, with the piezoelectric ceramic actuator disposed on the top of the corresponding adjusting block; and a slide, connected to the top of the carrier, with the adjusting blocks slidably disposed on the corresponding slide.

[0009] As an alternative, the ring light source assembly includes a first carrier plate and a second carrier plate, with corresponding placement holes between the first carrier plate and the second carrier plate defining the light source position; multiple assembly slots are evenly opened on the side wall of the light source position, and a light source generator is installed in each assembly slot.

[0010] As an optional solution, the ring light source assembly further includes: an adjustment plate, sleeved on the outside of the light source position, which can be driven to move up and down relative to the first carrier plate, and the adjustment plate has a sleeve hole corresponding to the light source position; a mounting block, which is installed inside the sleeve hole corresponding to the light source generator, and a sliding pin is fixedly provided between each group of mounting blocks; an adjustment block, which is configured between each group of mounting blocks, and a guide hole is provided inside the adjustment block, through which the sliding pin slides, and the light source generator is set on one side of the adjustment block; and elastic pins, which are set on both sides of the light source generator, and the elastic pins are rotatably set on both sides of the corresponding assembly slot.

[0011] As an alternative, a surrounding plate is provided at the testing station corresponding to the first carrier plate; the first carrier plate can be driven to move up and down along the surrounding plate.

[0012] As an alternative, a connector is provided on the top of the collection hood, and an image acquisition device is connected to the top of the connector; a dual-color display panel is provided directly below one of the collection hoods.

[0013] As an alternative, a concave mirror is positioned directly below another collection hood, and the concave mirror and the dual-color display panel are driven to work alternately between the two workstations; a point light source assembly is positioned on one side of the connecting base, and a semi-transparent and semi-reflective mirror is fixedly positioned inside the connecting base, with the point light source assembly located on the side of the semi-transparent and semi-reflective mirror; a collimating lens group is positioned between the point light source assembly and the semi-transparent and semi-reflective mirror.

[0014] As an optional solution, a replacement assembly for changing the working positions of the dual-color display panel and the concave mirror is also included. The replacement assembly includes: a first drive wheel, a set of which is rotatably positioned below the testing platform; a second drive wheel, a set corresponding to the first drive wheel and rotatably positioned below the testing platform, with the first and second drive wheels linked by a drive belt; a first slide block supporting the concave mirror, positioned at the top of the drive belt and slidably positioned below the testing platform; a second slide block connected to the drive belt and slidably positioned below the first slide block; and a support platform supporting the dual-color display panel, connected above the second slide block. The support platform moves downwards as the second slide block approaches the first slide block and moves upwards to reset after passing the first slide block.

[0015] As an optional solution, the support platform is connected to a drive plate via a limiting rod, and the limiting rod slides through the second slide block; the bottom of the drive plate is provided with a roller that rotates via a wheel seat; a guide plate is fixedly provided at the bottom of the testing platform, and a guide groove is provided at the guide plate. The guide groove includes a middle horizontal groove in the middle of the guide plate, a lifting groove connected to both ends of the middle horizontal groove, and an end horizontal groove connected to the other end of the lifting groove. The roller is configured in the guide groove.

[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: (1) This application uses uniformly arranged piezoelectric ceramic actuators to support the lens under test, and adjusts the flexible plunger head at the top of the piezoelectric ceramic actuator at the micron level according to the pressure detection signal, so that the pressure values ​​of several fulcrums are equal, thereby realizing feedback adjustment of the level of the lens under test, solving the problem that it is difficult to ensure the level of the lens under test during detection, and thus realizing easy adjustment of the level of the lens under test.

[0017] (2) This application forms an annular dark field illumination source by setting an annular light source assembly on the outside of the lens to be tested, so that the annular light source assembly, in conjunction with the collection cover, realizes the defect detection of the lens to be tested based on the principle of detecting scattered light by integrating sphere.

[0018] (3) This application sets up a dual-color display panel and a concave mirror under the two workstations respectively, so that the two workstations can be tested at the same time and two sets of tests can be performed at the same time. After the test, the test work of the dual-color display panel and the concave mirror can be exchanged, so that the lens under test on the same workstation can be tested for multiple tests, thus realizing the effect of multi-functional testing of the lens under test in one loading. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of the optical lens precision testing device disclosed in the embodiment of this application; Figure 2 is a cross-sectional schematic diagram of the optical lens precision testing device disclosed in the embodiment of this application; Figure 3 is a schematic diagram of the testing stage structure in the optical lens precision testing device disclosed in the embodiment of this application; Figure 4 is an exploded view of the ring light source assembly in the optical lens precision testing device disclosed in the embodiment of this application; Figure 5 is an enlarged view of point A in Figure 4; Figure 6 is an exploded view of the collection hood in the optical lens precision testing device disclosed in the embodiment of this application; Figure 7 is a schematic diagram of the light source generator in the optical lens precision testing device disclosed in the embodiment of this application; Figure 8 is a support assembly in the optical lens precision testing device disclosed in the embodiment of this application. Figure 9 is an enlarged structural schematic diagram of point B in Figure 8; Figure 10 is an exploded structural schematic diagram of the replacement component in the optical lens precision testing device disclosed in the embodiment of this application; Figure 11 is a bottom structural schematic diagram of the replacement component in the optical lens precision testing device disclosed in the embodiment of this application; Figure 12 is an internal structural schematic diagram of the testing box in the optical lens precision testing device disclosed in the embodiment of this application; Reference numerals in the figures: 100, lens to be tested; 1, testing stage; 11, placement hole; 12, testing box; 13, pick-up and drop-off window; 14, door panel; 15, connecting rod; 16, push-pull rod; 17, first push rod; 18, display controller; 19, enclosure; 2, support component; 21, piezoelectric ceramic actuator; 22, flexible plunger head; 2 3. Support plate; 24. Carrier; 25. Internal gear ring; 26. Synchronous gear; 27. Rack; 28. Slide table; 29. ​​External gear ring; 210. Intermediate gear; 211. Drive gear; 212. First motor; 213. Base; 214. Detection hole; 3. Ring light source assembly; 31. First carrier plate; 32. Second carrier plate; 33. Light source position; 34. Assembly slot; 35. Light source generator; 36. Adjusting plate; 37. Sleeve hole; 38. Mounting block; 39. Sliding pin; 310. Adjusting block; 311. Guide hole; 312. Elastic pin; 313. Limiting post; 314. Sliding sleeve; 315. Second push rod; 316. Third push rod; 4. Collection cover; 41. Connecting seat; 42. Point light source assembly; 43. Semi-transparent 44. Semi-reflective mirror; 45. Photodiode; 46. Ring plate; 47. Sensor; 48. Connecting ring; 49. Connecting rod; 40. Hanging plate; 410. Fourth push rod; 5. Image acquisition device; 6. Dual-color display panel; 7. Concave mirror; 81. Displacement assembly; 82. Side plate; 83. First transmission wheel; 84. Second transmission wheel; 85. Transmission belt; 86. First slide block; 87. Second slide block; 88. Fixing sleeve; 89. Support platform; 810. Limiting rod; 811. Driving plate; 812. Wheel seat; 813. Roller; 814. Support; 815. Guide plate; 816. Middle horizontal groove; 817. Lifting groove; 818. End horizontal groove; 819. First slide rail; 820. Second slide rail; 811. Second motor. Detailed Implementation

[0020] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Referring to Figures 1, 2, 3, 6, 9, and 12, this application discloses an optical lens precision testing device, including a testing stage 1, a support assembly 2, a ring light source assembly 3, and a collection cover 4. The testing stage 1 has a placement hole 11 on its inner side, and a testing box 12 is fixedly mounted on the top of the testing stage 1. The support assembly 2 is located at the bottom of the testing stage 1 corresponding to the placement hole 11, for horizontally supporting the lens 100 to be tested. The ring light source assembly 3 is located at the top of the testing stage 1 corresponding to the placement hole 11, for illuminating the lens 100 to be tested in a dark field with a low incident angle. A ring plate 45 is fixedly mounted at the bottom of the collection cover 4. A sensor 46 is fixedly installed at the bottom of the plate 45. A connecting ring 47 is detachably installed at the top of the ring plate 45. A connecting rod 48 is fixedly installed at the top of the connecting ring 47. A hanging plate 49 is fixedly installed at the top of the connecting rod 48. A fourth push rod 410 for driving the hanging plate 49 to move up and down is fixedly installed at the top of the detection box 12. Several photodiodes 44 are embedded in the inner wall of the collection cover 4. The support assembly 2 includes piezoelectric ceramic actuators 21 evenly arranged. A flexible plunger head 22 is provided at the actuation end of the piezoelectric ceramic actuator 21. A miniature pressure sensor is provided at the bottom of the flexible plunger head 22.

[0022] When testing the lens 100, it is moved above the placement hole 11 by manual labor or a robotic arm. The lens 100 is supported by piezoelectric ceramic actuators 21 evenly arranged in the support assembly 2. The actuating end of the piezoelectric ceramic actuator 21 is equipped with a flexible plunger head 22 to support the lens 100 and prevent damage. The pressure from the lens 100 is detected by a miniature pressure sensor at the bottom of the flexible plunger head 22. Specifically, when the lens 100 is placed, three miniature pressure sensors monitor the contact pressure distribution in real time. If the pressure is uneven, it indicates that the lens is tilted or the center of gravity is off. Since piezoelectric ceramics have nanometer-level displacement resolution, the system can independently drive the three piezoelectric ceramic actuators 21 to perform micrometer-level lifting compensation until the pressure values ​​of the three points are balanced, realizing active force feedback leveling. Then, the fourth push rod 410 drives the hanging plate 49 to move downward, causing the hanging plate 49 to move the collection cover 4 downward a certain distance. When the sensor 46 at the bottom of the ring plate 45 detects the specified signal (pressure or distance signal), it indicates that the collection cover 4 has moved to the specified position, causing the collection cover 4 to move downward above the ring light source assembly 3. When the ring dark field light source formed by the ring light source assembly 3 is incident on the surface of the lens under test 100 at a low angle (dark field illumination), if the surface is smooth, no light enters the interior of the upper collection cover 4; if there are scratches or pits, the scattered light enters the interior of the collection cover 4 and is captured by the photodiode 44. Then, based on the principle of detecting scattered light by the integrating sphere, the defect detection of the lens under test 100 is realized. The inner wall of the collection cover 4 is coated with a diffuse reflection coating.

[0023] Referring to Figures 1 and 12, a pick-up and drop-off window 13 is provided on one side of the testing box 12. A door panel 14 is rotatably mounted on the outside of the pick-up and drop-off window 13. A connecting rod 15 is fixedly mounted on the rotating end of the top of the door panel 14, and a push-pull rod 16 is fixedly mounted on the other end of the connecting rod 15. A first push rod 17 is rotatably mounted on the top of the testing box 12. The telescopic end of the first push rod 17 is rotatably connected to the push-pull rod 16. A display controller 18 is fixedly mounted on the outside of the testing box 12. After the lens to be tested 100 completes dual-station loading, the first push rod 17 pushes the push-pull rod 16 forward, causing the push-pull rod 16 to push the door panel 14 to rotate a certain angle through the connecting rod 15, thereby sealing the pick-up and drop-off window 13 to block external light and prevent interference with the testing environment inside the testing box 12. Before testing, the testing parameters can be adjusted through the display controller 18, and during testing, the testing information can be displayed and recorded through the display controller 18.

[0024] Referring to Figures 2, 3, 4, 8 and 9, the inner side of the testing stage 1 is provided with two placement holes 11 to form a dual-station; and the support component 2, the ring light source component 3 and the collection cover 4 are all provided with dual-stations corresponding to the placement holes 11.

[0025] The support assembly 2 also includes a support plate 23 fixedly installed at the bottom of the testing table 1. A carrier 24 is fixedly installed on the top of the support plate 23. An internal gear ring 25 is rotatably installed on the outer side of the carrier 24. A synchronous gear 26 is meshed with the piezoelectric ceramic actuator 21 on the inner side of the internal gear ring 25. A rack 27 is meshed with the outer side of the synchronous gear 26. One end of the rack 27 is fixedly connected to the corresponding piezoelectric ceramic actuator 21. The rack 27 is slidably installed on the top of the slide table 28. The slide table 28 is fixedly installed on the top of the carrier 24. The synchronous gear 26 is rotatably installed on the top of the carrier 24. The internal gear ring 25 located on the dual-station is driven to rotate synchronously by external force. Furthermore, by driving the internal gear ring 25 to rotate outside the carrier 24, the internal gear ring 25 synchronously drives the inner synchronous gear 26 to rotate, and the synchronous gear 26 simultaneously drives the rack 27 to move radially along the placement hole 11 on the top of the slide table 28, so that the rack 27 drives the evenly distributed piezoelectric ceramic actuators 21 to adjust the support radius to adapt to the testing of lenses 100 of different diameters; in order to facilitate the synchronous adjustment of the piezoelectric ceramic actuators 21 on the dual-station, referring to Figures 7 and 12, an outer gear ring 29 is coaxially fixedly provided on the outer side of the internal gear ring 25, and an intermediate gear 210 is meshed between the two outer gear rings 29. The intermediate gear 210 is rotatably set on the top of the support plate 23, and a drive gear 211 is meshed on the outer side of one of the outer gear rings 29. A first motor 212 for driving the drive gear 211 is fixedly provided at the bottom of the support plate 23, and a base 213 is fixedly provided at the bottom of the support plate 23.

[0026] During operation, the first motor 212 drives the drive gear 211 to rotate, which in turn drives one of the external gear rings 29 to rotate. This causes the external gear ring 29 to drive the external gear ring 29 on another station to rotate synchronously through the intermediate gear 210. This causes the two external gear rings 29 to drive the internal gear rings 25 on the two stations to rotate synchronously, thereby achieving synchronous adjustment of the piezoelectric ceramic actuators 21 on the two stations, making operation more convenient.

[0027] To adapt the ring light source assembly 3 to illumination conditions of the lens 100 under test with different thicknesses (incident heights), referring to Figures 3 and 4, the ring light source assembly 3 includes a first carrier plate 31 and a second carrier plate 32. Two light source positions 33 are fixedly arranged between the first carrier plate 31 and the second carrier plate 32 corresponding to the placement holes 11. Assembly slots 34 are opened on the side walls of the light source positions 33. The assembly slots 34 are evenly distributed. A light source generator 35 is installed inside each of the assembly slots 34 to form a ring dark field light source array on the outside of the lens 100 under test. A third push rod 316 is fixedly arranged at each of the four corners of the bottom of the first carrier plate 31. A surrounding plate 19 is fixedly arranged on the top of the test stage 1 corresponding to the first carrier plate 31 and the second carrier plate 32. The third push rods 316 are all fixedly arranged on the top of the test stage 1. The first carrier plate 31 is driven to move up and down inside the enclosure 19 by the third push rod 316, so that the first carrier plate 31 drives the light source generator 35, which is evenly arranged inside the light source position 33, to adjust the illumination height, so as to adapt to the dark field illumination requirements of the lens 100 under test of different specifications.

[0028] It should be noted that, in order to facilitate the adjustment of the incident angle of the light source generator 35 and achieve low-angle illumination, referring to Figures 4, 6 and 11, an adjustment plate 36 is sleeved on the outside of the light source position 33. A sleeve hole 37 is opened on the inside of the adjustment plate 36 corresponding to the light source position 33. Several sets of mounting blocks 38 are fixedly arranged on the inside of the sleeve hole 37 corresponding to the light source generator 35. A sliding pin 39 is fixedly arranged between each set of mounting blocks 38. The sliding pin 39 is slidably arranged on the inside of the adjustment block 310. A guide hole 311 is opened on the inside of the adjustment block 310 corresponding to the sliding pin 39. Elastic pins 312 are arranged on both sides of the light source generator 35. The elastic pins 312 are rotatably arranged on both sides of the assembly groove 34. Limiting posts 313 are symmetrically fixedly arranged on the top of the sleeve hole 37. The limiting posts 313 are all slidably arranged on the inside of the sliding sleeve 314. The sliding sleeve 314 is fixedly arranged on the top of the first carrier plate 31. A second push rod 315 for driving the adjustment plate 36 to move up and down is fixedly arranged on the top of the first carrier plate 31.

[0029] When the illumination angle is adjusted, the second push rod 315 drives the adjustment plate 36 to slide the limiting post 313 inside the sliding sleeve 314, so that the adjustment plate 36 moves up and down along the axial direction of the placement hole 11. Then, the sliding pin 39 inside the sleeve hole 37 moves the light source generator 35 around the elastic pin 312. At this time, the sliding pin 39 slides inside the guide hole 311. The angle of the light source generator 35 is adjusted by moving up and down, so as to adjust the illumination angle of the light source generator 35. Combined with the height adjustment of the light source generator 35, the light source generator 35 can adapt to the dark field illumination of the test lens 100 of different specifications. It should be noted that for dark-field defect detection of optical lenses, the recommended incident angle of the ring light (the angle relative to the horizontal plane of the lens being tested) is 5°~30°, with the optimal range being 5°~15°. Among them, 5°~15° (ultra-low angle / grazing): suitable for detecting extremely small surface scratches, dust, and pitting; the light passes almost parallel to the lens surface, and scattering only occurs when it encounters raised dust or sunken scratches; 15°~30° (standard low angle): suitable for detecting edge chipping or larger surface damage of the lens.

[0030] The first push rod 17, the second push rod 315, the third push rod 316 and the fourth push rod 410 mentioned in the above technical solution are all power rods with thread output function. In actual operation, one or more of electric push rods, pneumatic push rods or hydraulic push rods and linear guides can be selected according to specific needs.

[0031] Traditional testing of the lens under test 100 requires transfer at a single workstation. After each transfer, the orientation of the lens under test 100 must be stabilized, which is time-consuming and labor-intensive. To achieve multi-parameter testing without transferring the lens under test 100, as shown in Figures 2 and 5, an image acquisition device 5 and a dual-color display panel 6 are also included. The dual-color display panel 6 is located directly below one of the collection covers 4. A connecting seat 41 is fixedly installed on the top of the collection cover 4, and the image acquisition device 5 is fixedly installed on the top of the connecting seat 41. Specifically, the dual-color display panel 6 is located below the support plate 23, and a detection hole 214 is opened on the inner side of the support plate 23 directly below the placement hole 11.

[0032] When the lens 100 is tested for refractive power, the dual-color display panel 6 located on the lower layer emits light beams of different colors. The light beams penetrate directly through the lens 100 and enter the image acquisition device 5 above. The image acquisition device 5 acquires the displayed image (transmission light field detection module), and the terminal analysis system judges the test results.

[0033] To facilitate surface morphology inspection of the lens 100 under test, referring to Figures 2 and 6, a concave mirror 7 is also included. The concave mirror 7 is located directly below another collection cover 4. The concave mirror 7 and the dual-color display panel 6 are driven by external force to work alternately between the two inspection stations. A point light source assembly 42 is fixedly installed on one side of the connecting seat 41. A semi-transparent and semi-reflective mirror 43 is fixedly installed at a 45° angle on the inner side of the connecting seat 41. The point light source assembly 42 is located on the side of the semi-transparent and semi-reflective mirror 43, and a collimating lens group (not shown in the figure) is provided between the point light source assembly 42 and the semi-transparent and semi-reflective mirror 43.

[0034] After the dual-color display panel 6, in conjunction with the image acquisition device 5, detects the lens 100 under test, the dual-color display panel 6 at the first station and the concave mirror 7 at the second station are swapped. The concave mirror 7 is positioned at the first station, and then a point light source is emitted through the point light source assembly 42. According to optical principles, the light emitted from the focal point of the point light source assembly 42 becomes a parallel beam after passing through the collimating lens group. This horizontally propagating parallel beam encounters the semi-transparent mirror 43, which is physically tilted at 45°. The light, originally propagating along the X-axis (horizontal), is forcibly changed to propagating along the Z-axis (vertical). The light beam propagates vertically downwards, so that after reflection, it is now a vertically downward parallel beam (or a nearly parallel light field) with a sufficiently large diameter. The diameter of the spot of this vertical beam is larger than the diameter of the lens under test 100, thereby achieving vertical passive illumination of the entire surface of the lens under test 100. After passing through the lens under test 100, the light hits the concave mirror 7, is reflected back through the lens under test 100, and is received by the image acquisition device 5 above. This structure utilizes optical path multiplication and schlieren effect to enhance the contrast of the lens structure and surface micro-scratches (reflective schlieren detection module).

[0035] To achieve the interchangeable function of the dual-color display panel 6 and the concave mirror 7, referring to Figures 2, 10, and 11, a replacement assembly 8 is also included. The replacement assembly 8 has symmetrically arranged side plates 81. On the side of the side plates 81 that are close to each other, a first transmission wheel 82 and a second transmission wheel 83 are rotatably arranged. The first transmission wheel 82 and the second transmission wheel 83 are linked together by a transmission belt 84. A first slide block 85 for supporting the concave mirror 7 is fixedly arranged at the top of the transmission belt 84. The first slide block 85 is horizontally slidably arranged between the two side plates 81. A second slide block 86 is fixedly arranged at the bottom of the transmission belt 84. Both the first slide block 85 and the second slide block 86 are fixedly connected to the transmission belt 84 through a fixing sleeve 87. A support platform 88 for supporting the dual-color display panel 6 is arranged at the top of the second slide block 86.

[0036] Specifically, limit rods 89 are symmetrically fixed at the bottom of the support platform 88. The limit rods 89 are slidably disposed inside the second slide block 86. A driving plate 810 is fixedly disposed at the bottom of the limit rods 89. A wheel seat 811 is fixedly disposed at the bottom of the driving plate 810. A roller 812 is rotatably disposed on the outer side of the wheel seat 811. A support 813 is fixedly disposed at the bottom of the side plate 81. A guide plate 814 is fixedly disposed inside the support 813. A guide groove is provided at the guide plate 814. The guide groove includes a middle horizontal groove 815, a lifting groove 816, and an end horizontal groove 817. Specifically, a middle horizontal groove 815 is provided in the middle of the guide plate 814. A lifting groove 816 is symmetrically provided at both ends of the middle horizontal groove 815, and an end horizontal groove 817 is provided at the other end of the lifting groove 816. The roller 812 moves along the middle horizontal groove 815, the lifting groove 816 and the end horizontal groove 817. A first slide rail 818 and a second slide rail 819 are also fixedly provided on the side of the two side plates 81 that are close to each other. The first slide rail 818 and the second slide rail 819 are respectively located at the bottom of the first slide block 85 and the second slide block 86. A second motor 820 for driving two first transmission wheels 82 is fixedly provided on the outside of one side plate 81. The two second transmission wheels 83 are coaxially fixedly connected.

[0037] Then, when exchanging the working positions of the dual-color display panel 6 and the concave mirror 7, the second motor 820 drives the first transmission wheel 82 to rotate, so that the first transmission wheel 82 drives the second transmission wheel 83 to rotate via the transmission belt 84. During the transmission process, the transmission belt 84 drives the first slide block 85 and the second slide block 86 to slide horizontally along the first slide rail 818 and the second slide rail 819 respectively, and move closer to each other. At this time, the second slide block 86 drives the roller 812 at the bottom of the driving plate 810 to move from the inside of the end horizontal groove 817 to the inside of the lifting groove 816. When passing through the lifting groove 816, the roller 812 drives the driving plate 810 to move downward a certain height, so that the driving plate 810 drives the dual-color display panel 6 on the inside of the support platform 88 via the limiting rod 89. As the second slide 86 continues to move downwards, when the roller 812 passes through the middle horizontal groove 815, it drives the support platform 88 and the dual-color display panel 6 on its inner side to exchange positions with the concave mirror 7 from below the first slide 85. Finally, the second slide 86 continues to move to the second station. At this time, the roller 812 moves upwards through the lifting groove 816 on the other side to the inner side of the end horizontal groove 817, so that the driving plate 810 pushes the support platform 88 and the dual-color display panel 6 on its inner side to move upwards to the second station through the limiting rod 89. This realizes the self-exchange function of the dual-color display panel 6 and the concave mirror 7, so that the two stations can be inspected alternately to ensure the inspection efficiency of the lens 100 under test, and at the same time achieve a multi-functional inspection effect.

[0038] In summary, the optical lens precision testing device disclosed in this application sets the testing parameters according to the diameter and thickness of the lens 100 to be tested. This causes the first motor 212 to drive the drive gear 211 to rotate, thereby rotating one of the external gear rings 29. The external gear ring 29, through the intermediate gear 210, drives another external gear ring 29 at a different station to rotate synchronously. Both external gear rings 29 synchronously drive the internal gear rings 25 at two different stations to rotate synchronously. By driving the internal gear rings 25 to rotate outside the carrier 24, the internal gear rings 25 synchronously drive the inner synchronous gear 26 to rotate. The synchronous gear 26 simultaneously drives the rack 27 to move radially along the placement hole 11 on the top of the slide table 28. The rack 27 drives the evenly distributed piezoelectric ceramic actuators 21 to adjust the support radius; and the third push rod 316 drives the first carrier plate 31 to move up and down inside the enclosure 19, so that the first carrier plate 31 drives the light source generators 35 evenly arranged inside the light source position 33 to adjust the illumination height. The second push rod 315 drives the adjusting plate 36 to slide the limiting post 313 inside the sliding sleeve 314, so that the adjusting plate 36 moves up and down along the axial direction of the placement hole 11. Then, the sliding pin 39 inside the sleeve hole 37 moves the light source generator 35 around the elastic pin 312. At this time, the sliding pin 39 slides inside the guide hole 311. The angle of the light source generator 35 is adjusted by the up and down movement, so that... The illumination angle of the light source generator 35 is adjusted, along with its height, to adapt the light source generator 35 to provide dark-field illumination for different specifications of the test lens 100. After adjustment, the door plate 14 is opened by the first push rod 17, and the test lens 100 is transferred to the top of the placement hole 11 by manual operation or a robotic arm. The test lens 100 is supported by the flexible plunger head 22 at the top of the piezoelectric ceramic actuator 21. At this time, the pressure from the test lens 100 is detected by the miniature pressure sensor at the bottom of the flexible plunger head 22. If the pressure is uneven, it indicates that the lens is tilted or the center of gravity is off. In this case, the system can independently drive the three piezoelectric ceramic actuators 21 to perform... Micrometer-level lifting compensation is performed until the pressure values ​​at the three points are balanced. Then, the fourth push rod 410 drives the hanging plate 49 to move downward, causing the hanging plate 49 to move the collection cover 4 downward a certain distance, so that the collection cover 4 moves downward to above the ring light source assembly 3. The ring light source is formed by the light source generator 35 evenly distributed inside the light source position 33. When the adjusted ring light source is incident on the surface of the lens 100 under test at a low angle, if the surface is smooth, no light enters the interior of the upper collection cover 4. If there are scratches or pits, the scattered light enters the interior of the collection cover 4 and is captured by the photodiode 44. Thus, the defect detection of the lens 100 under test is realized based on the principle of detecting scattered light by the integrating sphere.At this time, the dual-color display panel 6 and the concave mirror 7 are located at the first and second workstations, respectively. When the dual-color display panel 6 at the first workstation is working, the lower dual-color display panel 6 emits beams of different colors. The beams directly penetrate the lens under test 100 and enter the image acquisition device 5 above. The image acquisition device 5 acquires the displayed image, and the terminal analysis system judges the test results. At the same time, when the concave mirror 7 at the second workstation is working, it emits a point light source through the point light source assembly 42. According to optical principles, the light emitted from the focal point of the point light source assembly 42 becomes a parallel beam after passing through the collimating lens group. This horizontally propagating parallel beam encounters a physical position that is tilted at 45°. After the semi-transparent and semi-reflective mirror 43 is placed, the light that originally propagated along the X-axis (horizontal) is forcibly changed to propagate along the Z-axis (vertically downward). This results in a reflected beam that is now a vertically downward parallel beam (or a nearly parallel light field) with a sufficiently large diameter. The spot diameter of this vertical beam is larger than the diameter of the lens under test 100, thus achieving full-surface vertical passive illumination of the lens under test 100. After passing through the lens under test 100, the light strikes the concave mirror 7, is reflected back through the lens under test 100, and is received by the image acquisition device 5 above. Finally, the replacement component 8 drives the dual-color display panel 6 and the concave mirror 7 to interchange positions, thus achieving multi-functional testing of the lens under test 100.

[0039] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0040] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0041] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An optical lens precision testing device, characterized in that, include: The test stage includes a support assembly comprising multiple evenly arranged piezoelectric ceramic actuators, each with a flexible plunger head at its actuation end and a miniature pressure sensor at its bottom. In operation, the support assembly provides horizontal support for the lens under test. A ring light source assembly is located on one side of the test stage, illuminating the lens under test with a low incident angle in the dark field during operation. A collection hood, hemispherical in shape, is positioned above the ring light source assembly in operation, and several photodiodes are embedded in the inner wall of the collection hood.

2. The optical lens accuracy testing device according to claim 1, characterized in that, The testing station has placement holes on its inner side. In the working state, the lens to be tested is placed in the placement holes; there are two placement holes to form a dual-station setup.

3. The optical lens precision testing device according to claim 1, characterized in that, The support assembly further includes: a carrier, disposed on the top of the testing table; adjusting wheels, which are synchronous gears, with multiple adjusting wheels corresponding to the piezoelectric ceramic actuators, all of which are rotatably disposed on the top of the carrier; adjusting blocks, which are racks, meshing with the corresponding adjusting wheels on one side, with the piezoelectric ceramic actuators disposed on the top of the corresponding adjusting blocks; and a slide, connected to the top of the carrier, with the adjusting blocks slidably disposed on the corresponding slide.

4. The optical lens accuracy testing device according to claim 2, characterized in that, The ring light source assembly includes a first carrier plate and a second carrier plate, with corresponding placement holes between the first carrier plate and the second carrier plate defining the light source position; multiple assembly slots are evenly opened on the side wall of the light source position, and a light source generator is installed in each assembly slot.

5. The optical lens precision testing device according to claim 4, characterized in that, The ring light source assembly also includes: an adjustment plate, sleeved on the outside of the light source position, which can be driven to move up and down relative to the first carrier plate, and the adjustment plate has a sleeve hole corresponding to the light source position; a mounting block, which is installed inside the sleeve hole corresponding to the light source generator, and a sliding pin is fixedly provided between each group of mounting blocks; an adjustment block, which is configured between each group of mounting blocks, and a guide hole is provided inside the adjustment block, through which the sliding pin slides, and the light source generator is set on one side of the adjustment block; and elastic pins, which are set on both sides of the light source generator, and the elastic pins are rotatably set on both sides of the corresponding assembly slot.

6. The optical lens precision testing device according to claim 4, characterized in that, A surrounding plate is provided at the testing station corresponding to the first carrier plate; the first carrier plate can be driven to move up and down along the surrounding plate.

7. The optical lens accuracy testing device according to claim 2, characterized in that, A connector is provided on the top of the collection hood, and an image acquisition device is connected to the top of the connector; a dual-color display panel is provided directly below one of the collection hoods.

8. The optical lens precision testing device according to claim 7, characterized in that, A concave mirror is located directly below another collection hood. The concave mirror and the dual-color display panel are driven to work alternately between the two workstations. A point light source assembly is located on one side of the connecting base. A semi-transparent and semi-reflective mirror is fixedly installed on the inner side of the connecting base, and the point light source assembly is located on the side of the semi-transparent and semi-reflective mirror. A collimating lens group is installed between the point light source assembly and the semi-transparent and semi-reflective mirror.

9. The optical lens precision testing device according to claim 8, characterized in that, It also includes a replacement assembly for changing the working positions of the dual-color display panel and the concave mirror; the replacement assembly includes: a first drive wheel, one set of which is rotatably arranged below the testing platform; a second drive wheel, one set of which is rotatably arranged below the testing platform corresponding to the first drive wheel, and the first and second drive wheels are linked by a drive belt; a first slide block, supporting the concave mirror, is arranged on top of the drive belt, and the first slide block is slidably arranged below the testing platform; a second slide block, connected to the drive belt, and slidably arranged below the first slide block; a support platform, supporting the dual-color display panel, is connected above the second slide block, and the support platform moves downward as the second slide block approaches the first slide block, and moves upward to reset after passing the first slide block.

10. The optical lens precision testing device according to claim 9, characterized in that, The support platform is connected to a drive plate via a limit rod, and the limit rod slides through the second slide block. A roller is mounted on the bottom of the drive plate via a wheel seat. A guide plate is fixedly mounted on the bottom of the testing platform. A guide groove is provided on the guide plate. The guide groove includes a middle horizontal groove in the middle of the guide plate, a lifting groove connected to both ends of the middle horizontal groove, and an end horizontal groove connected to the other end of the lifting groove. The roller is configured in the guide groove.

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