Optical lens detection method and detection system

Abstract

The present invention discloses an optical lens detection method, and the present invention relates to optical lens detection technology. In this method, detection is performed on two vertical reference planes respectively, and then an industrial camera and a laser sensor are combined to accurately measure the radius of curvature of a convex lens on the two reference planes, and a comparison is made to determine whether it meets the standard, thereby avoiding scratching the lens surface. The present invention also discloses an optical lens detection system, in which convex lenses of different sizes and shapes can be processed, and the system has good versatility and flexibility. Among them, the improvement of the clamping assembly can effectively fix the convex lens, especially the improved fixture plate adds components such as a lower pressure plate and a magnet block, which can ensure a stable clamping state even for a convex lens with an arc-shaped bottom, thereby avoiding the problem of offset during the detection process.

Description

Technical Field

[0001] The present invention relates to optical lens detection technology, and in particular to an optical lens detection method and a detection system thereof. Background Art

[0002] The optical lens is composed of multiple groups of optical lenses, and the multiple groups of optical lenses are separated by metal sheets to adjust the distance. One group of optical lenses is composed of a convex mirror or a concave mirror. However, during the assembly process, the surface profile of the convex mirror or the concave mirror needs to be measured separately.

[0003] The prior art includes, for example, a Chinese patent application with publication number CN117110297A, which provides a method for detecting small defects of VR optical lenses based on virtual images. In this patent, it is possible to detect whether there are small defects on the surface of an optical lens.

[0004] However, during the inspection of optical lenses, it is also necessary to check whether the curvature of the convex or concave surface meets the standard. Common measurement methods include: probe method and white light interferometry. The principle of the probe method is to scan the surface contour of the lens by contacting the probe on the lens. This method is easy to scratch the surface of the lens, and the wear of the probe affects the measurement accuracy. The white light interferometry method is a non-contact detection method, which requires image stitching to obtain the complete contour shape. The stitched image is prone to errors. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes an optical lens detection method, which adopts a non-contact detection method to detect whether the surface curvature of the optical lens meets the standard. Furthermore, the present invention also proposes an optical lens detection system, which can be suitable for clamping various models of optical lenses.

[0006] The technical solution of the present invention is achieved in this way:

[0007] An optical lens detection method, characterized in that the specific steps include:

[0008] Step 1: Establish a first reference plane and a second reference plane perpendicular to the convex lens base along the center of the convex lens;

[0009] Step 2: Establish a rectangular coordinate system with the first reference plane as the plane, and scan the convex lens with an industrial camera to generate a first scanning curve;

[0010] Step 3: Generate a first trajectory curve with the center of the convex lens base as the center of the circle, and then move the laser sensor along the first trajectory curve to form a plurality of first contact points on the surface of the convex lens;

[0011] Step 4: Taking the center of the convex lens base as the origin, obtain the coordinates of multiple first contact points;

[0012] Step 5: Calculate the first curvature radius R1 of the convex lens according to the coordinates of the plurality of first contact points;

[0013] Step 6: Establish a rectangular coordinate system with the second reference plane as the plane, and scan the convex lens again with the industrial camera to generate a second scanning curve;

[0014] Step 7: With the center of the convex lens base as the center of the circle, a second trajectory curve is generated, and the industrial camera moves along the second trajectory curve to form a plurality of second contact points on the surface of the convex lens;

[0015] Step 8: Taking the center of the convex lens base as the origin, obtain the coordinates of multiple second contact points;

[0016] Step 9: Calculate the second curvature radius R2 of the convex lens according to the coordinates of the plurality of second contact points;

[0017] Step 10: Determine whether the difference between the first radius of curvature R1 and the second radius of curvature R2 is within a tolerance range (ΔR), wherein |R1-R2|≤ΔR.

[0018] In the optical lens detection method of the present invention, the first reference plane and the second reference plane are perpendicular, and the first trajectory curve and the second trajectory curve are both perfect circular curves.

[0019] An optical lens detection system, characterized in that the optical lens detection system comprises:

[0020] A transport unit, wherein the transport unit is used to transport the convex lens;

[0021] A scanning unit, the scanning unit is used to scan the convex lens to form a first scanning curve and a second scanning curve;

[0022] The detection unit includes a lifting assembly, a deflection assembly, a steering assembly and a clamping assembly. The lifting assembly is connected to the deflection assembly and is used to control the up and down movement of the deflection assembly. The steering assembly is used to drive the convex lens to rotate. The clamping assembly includes a groove wheel plate and a groove track plate. The groove track plate is fixedly connected to the assembly plate. The groove wheel plate is rotatably installed between the groove track plate and the assembly plate. A plurality of eccentric grooves are arranged with the groove wheel plate as the center. A groove track plate is arranged on the upper top surface of the groove wheel plate. A plurality of linear groove tracks are arranged along the center of the groove track plate. A clamp plate is slidably connected in the groove track. The clamp plate is used to prevent the convex lens from shifting.

[0023] In the optical lens inspection system of the present invention, the fixture plate includes an arc-shaped plate body, an arc-shaped slider is arranged below the arc-shaped plate body, and a cylindrical lever is rotatably connected below the arc-shaped slider.

[0024] Among them, the arc-shaped slider cooperates with the groove rail and drives the arc-shaped plate body to slide along the groove rail. The cylindrical lever is located inside the eccentric groove. The groove wheel plate rotates to control multiple clamp plates to move close to the center of the groove rail plate, or move away from the center of the groove rail plate.

[0025] In the optical lens inspection system of the present invention, the bottom of the arc-shaped plate is provided with a first support plate, the middle thereof is provided with a second support plate, and the top thereof is provided with a third support plate.

[0026] Among them, the second support plate is slidably connected with a lower pressure plate, a return spring is arranged between the lower pressure plate and the bottom of the second support plate, a magnet block is arranged at the end of the lower pressure plate, and an electromagnetic block is arranged on the third support plate. The electromagnetic block and the magnet block are positioned oppositely and repel each other at the same level.

[0027] In the optical lens inspection system of the present invention, the transport unit comprises a bottom plate, one end of which is provided with a conveyor belt, and the conveyor belt is used to transport the convex lens to be inspected from one end to the other end.

[0028] An arc plate is arranged on one side of the conveyor belt, a support member 15 is arranged at one end of the conveyor belt away from the arc plate, an adjustment shaft is arranged in the middle of the support member, and the guide member is rotatably connected to the support member via the adjustment shaft, wherein the guide member is crescent-shaped and can rotate along the adjustment shaft, and is used to guide the convex lens on the conveyor belt to be transmitted to the arc plate.

[0029] In the optical lens inspection system of the present invention, the scanning unit and the inspection unit are installed in the middle of the curved plate, the scanning unit includes a plate support frame and a support head, a scanning camera is arranged at one end of the support head, a support plate is arranged at the end of the scanning camera away from the support head, an adjustment frame is arranged at the upper and lower ends of the plate support frame, and a searchlight is arranged at the end of the adjustment frame for providing light source to the scanning camera.

[0030] In the optical lens inspection system of the present invention, the lifting assembly includes a lifting plate, a driving motor is arranged on the top of the lifting plate, and a lifting screw is fixedly connected to the output shaft of the driving motor.

[0031] The lifting screw is cooperatively connected with a sliding block, wherein a deflection assembly is fixedly connected to the sliding block, and the driving motor is used to control the deflection assembly to slide up and down along the lifting screw.

[0032] In the optical lens inspection system of the present invention, the steering assembly includes a chassis, which is fixedly mounted below the base plate. One end of the chassis is rotatably connected to a worm gear, and one end of the worm gear is provided with a driving knob for driving the worm gear to rotate. A rotating disk is rotatably connected to the middle part of the chassis, and a turbine is provided on the outer diameter of the rotating disk. The turbine is meshed with the worm gear, and the turbine and the rotating disk are driven to rotate by the worm gear.

[0033] In the optical lens inspection system of the present invention, a scale disk is fixedly connected directly above the rotating disk, and an assembly disk is fixedly connected above the scale disk. The assembly disk is used to fix the clamping component and ensure that the clamping component can rotate with the rotating disk, the scale disk and the assembly disk.

[0034] The optical lens detection method and detection system of the present invention have the following beneficial effects:

[0035] The optical lens detection method of the present invention performs detection on two vertical reference planes respectively, and then combines an industrial camera and a laser sensor to accurately measure the curvature radius of the convex lens on the two reference planes, and judges whether it meets the standards through comparison to avoid scratching the lens surface.

[0036] The optical lens detection system of the present invention can handle convex lenses of different sizes and shapes, and has good versatility and flexibility. Among them, the improvement of the clamping component can effectively fix the convex lens, especially the improved fixture plate adds components such as a lower pressure plate and a magnet block, which can ensure a stable clamping state even for a convex lens with an arc bottom, avoiding the problem of offset during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a flowchart of the optical lens detection method of the present invention;

[0038] Figure 2 It is a simplified structural diagram of the optical lens detection method of the present invention;

[0039] Figure 3 It is a simplified structural diagram of the optical lens detection method of the present invention;

[0040] Figure 4 It is a structural schematic diagram of the optical lens detection system of the present invention;

[0041] Figure 5 Another perspective structural diagram of the optical lens detection system of the present invention;

[0042] Figure 6 It is another angle structure schematic diagram of the optical lens detection system of the present invention;

[0043] Figure 7 It is a schematic diagram of the structure of the scanning unit in the optical lens detection system of the present invention;

[0044] Figure 8 It is a schematic diagram of the structure of the detection unit in the optical lens detection system of the present invention;

[0045] Fig. 9 It is a structural schematic diagram of the deflection component in the detection unit of the present invention;

[0046] Fig.10 It is a schematic diagram of the installation of the steering assembly and the clamping assembly in the detection unit of the present invention;

[0047] Fig.11 for Fig.10 A schematic diagram of the structure from another angle;

[0048] Fig.12 for Fig.10 A partial cross-sectional view mainly showing the internal structure of the steering assembly;

[0049] Fig.13 It is a structural schematic diagram of a clamping assembly in a detection unit of the present invention;

[0050] Fig.14 It is a schematic diagram of the structure of the clamping assembly in the detection unit of the present invention from another angle;

[0051] The accompanying drawings are represented by: optical lens detection system 100, transport unit 10, bottom plate 11, conveyor belt 12, conveyor belt 12, arc plate 13, guard plate 14, support member 15, guide member 16, adjustment shaft 17, scanning unit 20, support plate frame 21, support head 22, scanning camera 23, support plate 24, focus adjustment lens 25, adjustment frame 26, searchlight 27, detection unit 30, lifting assembly 31, lifting plate 31, drive motor 312, lifting screw 313, sliding block 314, deflection assembly 32, guide frame 321, arc guide groove 322, deflection motor 323, lever 324, lever groove 325, Laser sensor 326, roller 327, steering assembly 33, chassis 331, worm rod 332, drive knob 333, rotating disk 334, turbine 335, dial 336, assembly disk 337, clamping assembly 34, groove wheel disk 341, eccentric groove 342, groove track disk 343, rotating disk 334, clamp plate 345, arc plate body 3451, first support plate 345A, second support plate 345B, third support plate 345C, arc slider 345D, cylindrical lever 345E, lower pressure plate 345F, return spring 345G, magnet block 345H, electromagnetic block 345I, dial 336, assembly disk 337. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0053] Embodiment 1

[0054] Reference Figures 1 to 3 As shown, the optical lens detection method of this embodiment includes the following specific steps:

[0055] Step 1: Establish a first reference plane and a second reference plane perpendicular to the convex lens base along the center of the convex lens;

[0056] Step 2: Establish a rectangular coordinate system with the first reference plane as a plane, scan the convex lens with an industrial camera, and generate a first scanning curve, where the first scanning curve presents a rough outline of the convex lens;

[0057] Step 3: With the center A of the convex lens base as the center of the circle, generate a first trajectory curve, and then move the laser sensor along the first trajectory curve to form multiple first contact points N on the surface of the convex lens. Figure 3 As shown, the first contact points are N1, N2, N3, N4 and N5. Figure 3 As shown, the diameter d of the convex lens base can be measured. The first trajectory curve is a perfect circular curve with the center A of the convex lens base as the center. Therefore, when the laser sensor moves along the first trajectory curve, the distance h between the laser sensor end and the center A of the convex lens base remains unchanged.

[0058] Step 4: Take the center A of the convex lens base as the origin and obtain the coordinates of multiple first contact points. The laser sensor emits a continuous modulated laser wave, usually a sine wave, rather than a pulse wave. The receiver measures the phase difference between the reflected wave and the transmitted wave. The phase difference is directly related to the distance. The phase of the sine wave changes with the distance during propagation. By measuring the phase difference, the number of additional wavelengths that the light wave travels during the round trip can be calculated, and then the actual distance can be calculated.

[0059] Specifically, the phase difference The relationship with the distance (d) can be expressed as: Wherein, λ is the wavelength of the light wave, 2d is the total round-trip distance of the light, and the coordinates of the first contact point are obtained according to the total round-trip distance of the light.

[0060] Step 5: Calculate the first curvature radius R1 of the convex lens according to the coordinates of the multiple first contact points.

[0061] Among them, the coordinates of the first contact points are (x i ,y i ), where i is the number of the first contact point. Establish the convex lens surface equations, (x0-x i ) 2 +(y0-y i ) 2 =R1 2 , the coordinates of the center of the convex lens are (x0, y0).

[0062] Expand and simplify the equation, x i 2 +y i2 -2(x0x i +y0y i )+x0 2 +y0 2 -R1 2 = 0. Since x i 2 +y i 2 The coordinates of each contact point N are known.

[0063] Therefore, we can rewrite the equation as: i =x i 2 +y i 2 , B i =2x i , C i =2y i , E i =x i 2 +y i 2 -R1 2 .

[0064] Substituting into the above equation, we can write: A i -B i x0-C i y0+x0 2 +y0 2 -R1 2 =E i .

[0065] Need to find (x0, y0, R1 2 ) value, so that the sum of the squares of the distances from all first contact points to the center of the sphere is minimized. Using matrix operations, the matrix M and vector b are constructed as follows:

[0066]

[0067] Solve the equation Mx=b, where x=(x0, y0, R1 2 ), obtain x0, y0, R1 according to the matrix 2 Specific value, and calculate the first curvature radius R1 of the convex lens.

[0068] Step 6: In the same way as above, a rectangular coordinate system is established with the second reference plane as the plane, and the convex lens is scanned again by the industrial camera to generate a second scanning curve;

[0069] Step 7: With the center A of the convex lens base as the center of the circle, a second trajectory curve is generated, and the industrial camera moves along the second trajectory curve to form a plurality of second contact points on the surface of the convex lens;

[0070] Step 8: Taking the center A of the convex lens base as the origin, obtain the coordinates of multiple second contact points;

[0071] Step 9: Calculate the second curvature radius R2 of the convex lens according to the coordinates of the plurality of second contact points;

[0072] Step 10: Determine whether the difference between the first radius of curvature R1 and the second radius of curvature R2 is within a tolerance range (ΔR), wherein |R1-R2|≤ΔR.

[0073] If the difference between the first curvature radius R1 and the second curvature radius R2 is less than or equal to the tolerance range, the surface profile of the convex lens meets the generation requirements; if the difference between the first curvature radius R1 and the second curvature radius R2 is greater than the tolerance range, the surface profile of the convex lens does not meet the generation requirements.

[0074] Preferably, the first reference plane and the second reference plane intersect each other perpendicularly.

[0075] Embodiment 2

[0076] On the basis of the above embodiments, this embodiment further discloses an optical lens detection system, which is used to implement the optical lens detection method disclosed in the above embodiments.

[0077] refer to Figures 4 to 14 As shown, the optical lens inspection system 100 includes a transport unit 10, a scanning unit 20 and a detection unit 30. The transport unit 10 is used to transport the convex lens to be inspected. The transport unit 10 includes a bottom plate 11, and a conveyor belt 12 is provided at one end of the bottom plate 11. The conveyor belt 12 is used to transport the convex lens to be inspected from one end to the other end.

[0078] An arc plate 13 is provided on one side of the conveyor belt 12, and a support member 15 is provided at one end of the conveyor belt 12 away from the arc plate 13, and an adjustment shaft 17 is provided in the middle of the support member 15. A guide member 16 is rotatably connected to the support member 15 via the adjustment shaft 17. The guide member 16 is crescent-shaped and can rotate along the adjustment shaft 17, and is used to guide the convex lens on the conveyor belt 12 to be transported to the arc plate 13. Guard plates 14 are also provided at both ends of the arc plate 13 to prevent the convex lens from detaching from the arc plate 13.

[0079] Refer again Figure 5 As shown, the scanning unit 20 and the detection unit 30 are installed in the middle of the curved plate 13, wherein the scanning unit 20 includes a support frame 21 and a support head 22, and a scanning camera 23 is arranged at one end of the support head 22. A support plate 24 is arranged at one end of the scanning camera 23 away from the support head 22, and the support plate 24 supports the scanning camera 23.

[0080] Adjustment racks 26 are provided at the upper and lower ends of the support plate rack 21, and searchlights 27 are provided at the ends of the adjustment racks 26 for providing light sources for the scanning camera 23. The distance between the two adjustment racks 26 can be adjusted according to actual usage.

[0081] Preferably, a focus adjustment lens 25 is further disposed between the two adjustment frames 26 , and the focus adjustment lens 25 is used to adjust the focus of the scanning camera 23 .

[0082] In this embodiment, the scanning unit 20 is used to scan the convex lens to obtain a first scanning curve and a second scanning curve.

[0083] Refer again Figures 8 to 14 As shown, the detection unit 30 includes a lifting assembly 31, a deflection assembly 32, a steering assembly 33 and a clamping assembly 34. The transport unit 10 transports the convex lens to the clamping assembly 34, and clamps and fixes the convex lens through the clamping assembly 34. The scanning unit 20 obtains the first scanning curve of the convex lens, and then the deflection assembly 32 forms a plurality of first contact points on the surface of the convex lens along the first scanning curve, and then calculates the first curvature radius of the convex lens according to the coordinates of the plurality of first contact points; then, the steering assembly 33 rotates a certain angle (preferably 90°), and then the scanning unit 20 obtains the second scanning curve of the convex lens again, and the deflection assembly 32 forms a plurality of second contact points on the surface of the convex lens along the second scanning curve, and then calculates the second curvature radius of the convex lens according to the coordinates of the plurality of second contact points. Finally, it is determined whether the difference between the first curvature radius R1 and the second curvature radius R2 is within the tolerance range.

[0084] Furthermore, the lifting assembly 31 includes a lifting plate 311, a driving motor 312 is arranged on the top of the lifting plate 311, and a lifting screw 313 is fixedly connected to the output shaft of the driving motor 312. The lifting screw 313 is matched with a sliding block 314, wherein the sliding block 314 is fixedly connected to the deflection assembly 32, and the driving motor 312 is used to control the deflection assembly 32 to slide up and down along the lifting screw 313.

[0085] Refer again Fig. 9 As shown, the yaw assembly 32 includes a guide frame 321, and the guide frame 321 is fixedly connected to the sliding block 314. The guide frame 321 is semicircular, and an arc guide groove 322 is provided in the middle thereof. A yaw motor 323 is provided with the arc guide groove 322 as the center of the circle, and a lever 324 is fixedly connected to the output shaft of the yaw motor 323, and a lever groove 325 is provided at one end of the lever 324 away from the yaw motor 323. A roller 327 is slidably connected in the lever groove 325, and a laser sensor 326 is provided at the end of the roller 327.

[0086] Preferably, the angle of the laser sensor 326 on the roller 327 can be adjusted according to actual usage.

[0087] In this embodiment, the yaw motor 323 drives the laser sensor 326 to move along the shifting groove 325 through the shifting rod 324, and forms a plurality of first contact points N on the surface of the convex lens.

[0088] Refer again Figures 10 to 12 As shown, the installation positions of the steering assembly 33 and the clamping assembly 34 are further disclosed. The steering assembly 33 includes a chassis 331, and the chassis 331 is fixedly installed below the bottom plate 11. One end of the chassis 331 is rotatably connected to a worm rod 332, and one end of the worm rod 332 is provided with a driving knob 333, and the driving knob 333 is connected to an external driving device (not shown in the figure) to drive the worm rod 332 to rotate. Among them, the middle part of the chassis 331 is rotatably connected to a rotating disk 334, and the outer diameter of the rotating disk 334 is provided with a turbine 335, the turbine 335 is meshed with the worm rod 332, and the worm rod 332 drives the turbine 335 and the rotating disk 334 to rotate.

[0089] Refer again Fig.11 and Fig.12 As shown, a scale plate 336 is fixedly connected just above the rotating disk 334. When the rotating disk 334 rotates, the rotation angle of the rotating disk 334 is determined by the scale plate 336. An assembly plate 337 is fixedly connected above the scale plate 336, and the assembly plate 337 is used to fix the clamping assembly 34 and ensure that the clamping assembly 34 can rotate together with the rotating disk 334, the scale plate 336 and the assembly plate 337.

[0090] Further, refer to Figure 12 to Figure 14 As shown, the clamping assembly 34 includes a groove wheel plate 341 and a groove rail plate 343. The groove rail plate 343 is fixedly connected to the assembly plate 337, and the groove wheel plate 341 is rotatably installed between the groove rail plate 343 and the assembly plate 337. A plurality of eccentric grooves 342 are arranged with the groove wheel plate 341 as the center. Fig.12 As shown, the middle of the rotating disk 334, the scale disk 336 and the assembly disk 337 are hollowed out to facilitate the fixed connection between the output shaft of the external drive motor (not shown) and the groove wheel disk 341. The upper top surface of the groove wheel disk 341 is provided with a groove track disk 343, and a plurality of straight groove tracks 344 are provided along the center of the groove track disk 343. A clamp plate 345 is slidably connected in the groove track 344, and the number of the clamp plates 345 is consistent with the number of the groove tracks 344.

[0091] In this embodiment, refer to Fig.13As shown, the fixture plate 345 includes an arc-shaped plate body 3451, an arc-shaped slider 345D is arranged below the arc-shaped plate body 3451, and a cylindrical lever 345E is rotatably connected below the arc-shaped slider 345D. The arc-shaped slider 345D cooperates with the groove rail 344 and drives the arc-shaped plate body 3451 to slide along the groove rail 344. The cylindrical lever 345E is located inside the eccentric groove 342. Among them, the external driving motor drives the groove wheel disc 341 to rotate, thereby controlling the multiple fixture plates 345 to move close to the center of the groove rail disc 343, or to move away from the center of the groove rail disc 343. That is, the multiple fixture plates 345 are controlled to open and close.

[0092] In this embodiment, the fixture plate 345 can better clamp the convex lens with a flat bottom and an arc-shaped top surface (such as Figure 2 However, when it comes to convex lenses with curved bottoms and tops, it is not possible to ensure that they are clamped stably, and further improvement is needed.

[0093] Embodiment 3

[0094] Based on one or more of the above embodiments, this embodiment further improves the optical lens detection system. Figure 13 to Figure 14 As shown, in this embodiment, the fixture plate 345 includes an arc-shaped plate body 3451, a first support plate 345A is provided at the bottom of the arc-shaped plate body 3451, a second support plate 345B is provided in the middle, and a third support plate 345C is provided at the top. Among them, a lower pressing plate 345F is slidably connected to the second support plate 345B, and a return spring 345G is provided between the lower pressing plate 345F and the bottom of the second support plate 345B. A magnet block 345H is provided at the end of the lower pressing plate 345F, and an electromagnetic block 345I is provided on the third support plate 345C. The electromagnetic block 345I is opposite to the magnet block 345H, and they repel each other at the same level.

[0095] In this embodiment, a clamping area is formed between the first support plate 345A and the second support plate 345B, and the convex lens is located in the clamping area and clamped by a plurality of clamping plates 345. Since the bottom of the convex lens is also an arc surface, during the clamping process, if the arc surface of the bottom of the convex lens does not conform to the surface, the convex lens is likely to deflect to one side, affecting the clamping efficiency.

[0096] Therefore, during the clamping process, the lower pressing plate 345F is lifted upward by the arc surface of the top surface of the convex lens. An adjustment area is formed between the second support plate 345B and the third support plate 345C. When the lower pressing plate 345F is lifted upward, the magnet block 345H moves in the adjustment area. If the convex lens deviates to one side, the heights of the multiple magnet blocks 345H in the adjustment area are not consistent. At this time, the multiple electromagnetic blocks 345I are energized to push the magnet block 345H to move downward in the adjustment area, and ensure that the heights of the multiple magnet blocks 345H in the adjustment area remain consistent, so that the convex lens that is deflected to one side is pressed down and straightened, thereby improving the clamping efficiency.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical lens detection method, characterized in that: The specific steps include: Step 1: Establish a first reference plane and a second reference plane perpendicular to the convex lens base along the center of the convex lens; Step 2: Establish a rectangular coordinate system with the first reference plane as the plane, and scan the convex lens with an industrial camera to generate a first scanning curve; Step 3: Generate a first trajectory curve with the center of the convex lens base as the center of the circle, and then move the laser sensor along the first trajectory curve to form a plurality of first contact points on the surface of the convex lens; Step 4: Taking the center of the convex lens base as the origin, obtain the coordinates of multiple first contact points; Step 5: Calculate the first curvature radius R1 of the convex lens according to the coordinates of the plurality of first contact points; Step 6: Establish a rectangular coordinate system with the second reference plane as the plane, and scan the convex lens again with the industrial camera to generate a second scanning curve; Step 7: With the center of the convex lens base as the center of the circle, a second trajectory curve is generated, and the industrial camera moves along the second trajectory curve to form a plurality of second contact points on the surface of the convex lens; Step 8: Taking the center of the convex lens base as the origin, obtain the coordinates of multiple second contact points; Step 9: Calculate the second curvature radius R2 of the convex lens according to the coordinates of the plurality of second contact points; Step 10: Determine whether the difference between the first radius of curvature R1 and the second radius of curvature R2 is within a tolerance range ΔR, where |R1-R2|≤ΔR.

2. The optical lens detection method according to claim 1, characterized in that: The first reference plane and the second reference plane are perpendicular to each other, and the first trajectory curve and the second trajectory curve are both perfect circular curves.

3. An optical lens detection system, which implements the optical lens detection method according to claim 1 or 2, characterized in that: The optical lens detection system comprises: A transport unit, wherein the transport unit is used to transport the convex lens; A scanning unit, the scanning unit is used to scan the convex lens to form a first scanning curve and a second scanning curve; The detection unit includes a lifting assembly, a deflection assembly, a steering assembly and a clamping assembly. The lifting assembly is connected to the deflection assembly and is used to control the up and down movement of the deflection assembly. The steering assembly is used to drive the convex lens to rotate. The clamping assembly includes a groove wheel plate and a groove track plate. The groove track plate is fixedly connected to the assembly plate. The groove wheel plate is rotatably installed between the groove track plate and the assembly plate. A plurality of eccentric grooves are arranged with the groove wheel plate as the center. A groove track plate is arranged on the upper top surface of the groove wheel plate. A plurality of linear groove tracks are arranged along the center of the groove track plate. A clamp plate is slidably connected in the groove track. The clamp plate is used to prevent the convex lens from shifting.

4. The optical lens detection system according to claim 3, characterized in that: The fixture plate comprises an arc-shaped plate body, an arc-shaped slider is arranged below the arc-shaped plate body, and a cylindrical lever is rotatably connected below the arc-shaped slider. Among them, the arc-shaped slider cooperates with the groove rail and drives the arc-shaped plate body to slide along the groove rail. The cylindrical lever is located inside the eccentric groove. The groove wheel plate rotates to control multiple clamp plates to move close to the center of the groove rail plate, or move away from the center of the groove rail plate.

5. The optical lens detection system according to claim 4, characterized in that: The arc-shaped plate body has a first support plate at the bottom, a second support plate at the middle, and a third support plate at the top. Among them, the second support plate is slidably connected with a lower pressure plate, a return spring is arranged between the lower pressure plate and the bottom of the second support plate, a magnet block is arranged at the end of the lower pressure plate, and an electromagnetic block is arranged on the third support plate. The electromagnetic block and the magnet block are positioned oppositely and repel each other at the same level.

6. The optical lens detection system according to claim 3, characterized in that: The transport unit comprises a bottom plate, one end of which is provided with a conveyor belt, and the conveyor belt is used to transport the convex lens to be inspected from one end to the other end. An arc-shaped plate is arranged on one side of the conveyor belt, a support is arranged on the end of the conveyor belt away from the arc-shaped plate, an adjustment shaft is arranged in the middle of the support, and a guide is rotatably connected to the support via the adjustment shaft, wherein the guide is crescent-shaped and can rotate along the adjustment shaft, and is used to guide the convex lens on the conveyor belt to be transmitted to the arc-shaped plate.

7. The optical lens detection system according to claim 3, characterized in that: The scanning unit and the detection unit are installed in the middle part of the arc plate. The scanning unit includes a support frame and a support head. A scanning camera is arranged at one end of the support head. A support plate is arranged at the end of the scanning camera away from the support head. Adjustment frames are arranged at the upper and lower ends of the support frame. A searchlight is arranged at the end of the adjustment frame to provide light source for the scanning camera.

8. The optical lens detection system according to claim 3, characterized in that: The lifting assembly comprises a lifting plate, a driving motor is arranged on the top of the lifting plate, and a lifting screw is fixedly connected to the output shaft of the driving motor. The lifting screw is cooperatively connected with a sliding block, wherein a deflection assembly is fixedly connected to the sliding block, and the driving motor is used to control the deflection assembly to slide up and down along the lifting screw.

9. The optical lens detection system according to claim 3, characterized in that: The steering assembly includes a chassis, which is fixedly installed below the base plate. One end of the chassis is rotatably connected to a worm gear, and one end of the worm gear is provided with a driving knob for driving the worm gear to rotate. The middle part of the chassis is rotatably connected to a rotating disk, and a turbine is provided on the outer diameter of the rotating disk. The turbine is meshed with the worm gear, and the worm gear drives the turbine and the rotating disk to rotate.

10. The optical lens detection system according to claim 9, characterized in that: A scale disc is fixedly connected just above the rotating disc, and an assembly disc is fixedly connected above the scale disc. The assembly disc is used to fix the clamping component and ensure that the clamping component can rotate together with the rotating disc, the scale disc and the assembly disc.

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