Optical lens centering and edging device

Abstract

The invention provides an optical lens centering and edging device. The optical lens centering and edging device comprises a workbench, a centering assembly and an edging assembly, the centering assembly comprises a translation part, a rotating part arranged on the translation part and a centering part arranged on the rotating part; the centering component comprises a center shaft, main centering connector blocks, auxiliary centering connector blocks, first driving units connected with the main centering connector blocks and second driving units connected with the auxiliary centering connector blocks, the main centering connector blocks and the auxiliary centering connector blocks are arranged in the circumferential direction of the center shaft, and the multiple main centering connector blocks define an annular connector coaxial with the center shaft. The auxiliary centering connector block is arranged below the main centering connector block, the first driving unit is used for driving the main centering connector block to be close to or away from the center shaft, and the second driving unit is used for driving the auxiliary centering connector block to be close to or away from the center shaft and close to or away from the main centering connector block. The optical lens centering and edging device solves the problem that in the prior art, an optical lens centering and edging device which is high in centering precision and efficiency and wide in application range does not exist.

Description

Technical Field

[0001] The invention relates to the technical field of production and processing of optical lenses, and in particular to an optical lens centering and edge grinding device. Background Art

[0002] Optical lenses are key components of various optical imaging systems. The quality of optical lenses directly affects the performance of imaging systems and even determines whether they are successful or not. Since optical lenses must have various aberration defects in theory, a more complex combination of optical lenses of different shapes and materials is often used in the design of optical lenses. The purpose is to correct various aberrations of optical lenses in order to obtain high-quality imaging quality. However, there are still many errors from the completion of the design to the actual manufacturing. In the actual manufacturing process of optical lenses, it is inevitable that there will be various parts manufacturing errors, lens installation errors, etc. Although the lenses, barrels, spacers and other parts of optical lenses that affect the quality of optical imaging generally have higher tolerance requirements, even so, these residual tolerances will still affect the imaging quality of the entire lens. The quality requirements of modern optical systems are getting higher and higher. For some special high-precision applications, the degradation of the optical system quality caused by the eccentricity of the lens of several microns is intolerable. Therefore, the precise control and adjustment process of the lens eccentricity has become a bottleneck in the manufacturing technology of optical lenses.

[0003] The existing lens centering methods include the lens surface direct reflection image centering method, the spherical center self-collimation image centering method, the optical television centering method and the mechanical centering method. Among them, the lens surface direct reflection image centering method requires simple equipment and is easy to operate, but has low accuracy and a narrow scope of application. Although the spherical center self-collimation image centering method and the optical television centering method have high accuracy, they have high requirements for equipment, and the centering efficiency is not as good as the mechanical centering method. Therefore, in the industrial production of large quantities of lenses, the most common method is still the mechanical centering method.

[0004] However, the centering accuracy of the mechanical centering method is affected by the centering coefficient. If the centering coefficient is less than a certain value, the accuracy of the mechanical centering is low. Therefore, the application scope of the mechanical centering edge grinding device is not enough and it is only applicable to lens structures with a large centering coefficient. Among them, the centering coefficient is determined by the friction coefficient between the centering fixture joint and the lens, the curvature radius of the lens, and the diameter of the centering fixture joint. The friction coefficient is usually constant. Therefore, when the mechanical centering fixture is determined, the type and specification of the lens that the mechanical centering fixture is suitable for processing are determined, which leads to a narrow application scope of the mechanical centering fixture and low versatility. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an optical lens centering and edging device, aiming to solve the problem in the prior art of lacking an optical lens centering and edging device with high centering accuracy and efficiency and a wide range of applicability.

[0006] An optical lens centering and edge grinding device according to an embodiment of the present invention comprises a workbench, a centering component and an edge grinding component arranged on the workbench, wherein two centering components are symmetrically arranged along the length direction of the workbench, and two edge grinding components are symmetrically arranged along the width direction of the workbench;

[0007] The centering assembly includes a translation component, a rotation component arranged on the translation component and a centering component arranged on the rotation component, the centering component includes a central axis, a main centering joint block and a secondary centering joint block arranged circumferentially around the central axis, a first driving unit connected to the main centering joint block, and a second driving unit connected to the secondary centering joint block;

[0008] The main centering joint block and the secondary centering joint block are arc-shaped, and multiple main centering joint blocks are combined to form a circular ring joint coaxially arranged with the central axis. The secondary centering joint block is arranged below the main centering joint block. The first driving unit is used to drive the main centering joint block to approach or move away from the central axis, and the second driving unit is used to drive the secondary centering joint block to approach or move away from the central axis while approaching or moving away from the main centering joint block.

[0009] In addition, the optical lens centering and edging device according to the above embodiment of the present invention may also have the following additional technical features:

[0010] Furthermore, the first driving unit includes a first screw rod, a first slider sleeved on the first screw rod, and a first connecting plate connected to the first slider at one end and connected to the middle part of the main centering block joint at the other end. One end of the central shaft is connected to the rotating component, and a driving bevel gear is provided on the side of the central shaft close to the rotating component. The first screw rod is provided with a first driven bevel gear adapted to the driving bevel gear on the side close to the central shaft.

[0011] Furthermore, the centering assembly also includes a fixed truncated cone having a mounting groove, the first drive unit and the second drive unit are arranged in the mounting groove, one end of the center axis passes through the fixed truncated cone and is connected to the rotating component, the active bevel gear is arranged at the bottom of the mounting groove, and one end of the first screw is rotatably connected to the side wall of the mounting groove.

[0012] Furthermore, the second driving unit includes a second screw rod, a second slider sleeved on the second screw rod, and a second connecting plate having one end connected to the middle of the auxiliary centering joint block and the other end arranged on the second slider;

[0013] The second screw rod is provided with a second driven bevel gear matched with the active bevel gear at one end close to the central axis, and the other end is rotatably connected with the side wall of the mounting groove, a connecting portion is extended outward from the top of the second sliding block, a groove matched with the second connecting block is provided on the top of the connecting portion, an avoidance groove penetrating the connecting portion is provided on the side of the connecting portion facing the central axis, an auxiliary block is extended toward the central axis direction of the side wall of the mounting groove, and an inclined portion is provided on the side of the auxiliary block away from the side wall of the mounting groove;

[0014] The inclined surface is at least partially located at the bottom of the avoidance groove, and the second connecting plate is placed in the groove and on the inclined surface at one end away from the auxiliary centering joint block, and is provided with an inclined surface adapted to the inclined surface.

[0015] Furthermore, a slide groove is provided at the bottom of the first slider and the second slider, and a guide block adapted to the slide groove is provided in the mounting groove, the axis of the first screw and the second screw intersects with the axis of the central axis, and the length direction of the guide block is consistent with the axis direction of the first screw or the second screw.

[0016] Furthermore, the main centering joint block and the secondary centering joint block have the same curvature, the secondary centering joint block is located between two adjacent main centering joint blocks, and the main centering joint block and the secondary centering joint block are both symmetrically arranged relative to the axis of the central axis.

[0017] Furthermore, limit blocks are provided on both sides of the bottom of the second connecting block, and the side walls of the groove are provided with guide grooves adapted to the limit blocks. An elastic member is provided in the guide groove, and both ends of the elastic member respectively abut against the top of the limit block and the inner wall of the top of the guide groove.

[0018] Furthermore, it is characterized in that a vacuum adsorption channel is provided at one end of the central shaft close to the main centering joint block, and the other end of the central shaft is connected to a vacuum adsorption device.

[0019] Further, the translation component includes a translation driving member, a telescopic rod arranged on the translation driving member, and a transmission rod having one end connected to the telescopic rod and the other end connected to the rotating member;

[0020] A sliding groove is provided on the top of the telescopic rod, and a limiting truncated platform adapted to the sliding groove is provided on the side of the transmission rod close to the telescopic rod, and the limiting truncated platform is placed in the sliding groove;

[0021] The rotating component includes a fixed seat connected to the transmission rod, a rotating drive member arranged on the fixed seat, and a rotating shaft connected to the rotating drive member, the rotating shaft is connected to the central axis, and a spring is sleeved on the transmission rod, and two ends of the spring are respectively against the bottom of the fixed seat and the top of the telescopic rod.

[0022] Furthermore, the edge grinding assembly includes an axial translation component, a rotating component arranged on the axial translation component, and a grinding piece arranged on the rotating component.

[0023] The present invention uses a circular joint surrounded by a plurality of main centering joint blocks to abut against the lens, and then applies a certain pressure to the lens through a translation component, and then the circular joint rotates under the action of the rotating component. When the lens is centered, the contact points between the lens and the circular joint are few, and the force balance cannot be achieved. Then, the lens will overcome the friction force and move under the action of the centering force perpendicular to the central axis decomposed by the extrusion force. When the lens stops moving and the lens stabilizes at the current position and remains unchanged under the rotation and shaking of the rotating component, it means that the lens has completed the centering. At this time, due to the symmetrical structure of the lens itself, the forces on both sides are balanced, so that the lens can stably maintain the current position. Then, the lens is polished by the edge grinding device. When the centering angle corresponding to the annular joint of the current size and the lens specification is small, the main joint centering block is driven away from the central axis through the first driving unit, so that multiple main joint centering blocks form a joint with a larger diameter, which can effectively improve the centering angle and achieve high-precision mechanical centering of the lens. Under the action of the second driving unit, the auxiliary joint centering block will also move synchronously in the direction away from the central axis and move along the length direction of the central axis, so that the auxiliary joint centering block will fill the gap between the adjacent main joint centering blocks, so that the auxiliary joint centering block and the main joint centering block jointly form a new centering joint, and ensure the contact area and gap between the centering joint and the lens, so as to ensure the stability and accuracy of the centering and edging, and increase the applicable scope of the centering and edging device, and the mechanical centering method itself has a very high centering efficiency. Therefore, the present invention solves the problem in the prior art of the lack of an optical lens centering and edging device with high centering accuracy and efficiency and a wide applicable scope. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an optical lens centering and edge grinding device in one embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of a centering component in one embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure after the centering component in one embodiment of the present invention hides the fixed truncated table;

[0027] Figure 4 It is a schematic diagram of the assembly of the main centering joint block and the first driving unit in one embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the assembly of the auxiliary centering joint block and the second driving unit in one embodiment of the present invention;

[0029] Figure 6 for Figure 5 Schematic diagram of the structure after hiding the second screw and the second slider;

[0030] Figure 7 is a schematic structural diagram of a second sliding block in one embodiment of the present invention;

[0031] Figure 8 It is a schematic diagram of assembling a translation component and a rotation component in one embodiment of the present invention;

[0032] Fig. 9 for Figure 8 Schematic cross-sectional view of ;

[0033] Fig.10 Schematic diagram of the structure of an edge grinding assembly in one embodiment of the present invention.

[0034] Description of main component symbols:

[0035] Workbench 10 Centering components 20 Edging components 30 Translation Parts 21 Rotating parts 22 Centering parts 23 Central axis 231 Main centering joint block 232 Auxiliary centering joint block 233 First drive unit 234 Second drive unit 235 First screw 2341 First Slider 2342 First connecting plate 2343 Driving bevel gear 236 First driven bevel gear 2344 Fixed round table 24 Mounting slot 241 Second screw 2351 Second slider 2352 Second connecting plate 2353 Second driven bevel gear 2354 Connection 2355 Grooves 2356 Avoidance slot 2357 Auxiliary blocks 242 Bevel part 2421 Chute 2345 Guide block 243 Limit block 2358 Guide groove 2359 Elastic parts 237 Vacuum adsorption channel 2311 Translation drive 211 Telescopic rod 212 Transmission rod 213 Slide slot 2121 Limiting round table 214 Fixed seat 221 Rotating drive 222 Shaft 223 spring 224 Axial translation components 31 Rotating parts 32 Polishing parts 33 DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] See also Figures 1 to 10 , shown is an optical lens centering and edging device in one embodiment of the present invention, comprising a workbench 10, a centering assembly 20 and an edging assembly 30 arranged on the workbench 10, two centering assemblies 20 are symmetrically arranged along the length direction of the workbench 10, and two edging assemblies 30 are symmetrically arranged along the width direction of the workbench 10;

[0040] The centering assembly 20 includes a translation component 21, a rotation component 22 arranged on the translation component 21, and a centering component 23 arranged on the rotation component 22. The centering component 23 includes a central axis 231, a main centering joint block 232 and a secondary centering joint block 233 arranged circumferentially around the central axis 231, a first driving unit 234 connected to the main centering joint block 232, and a second driving unit 235 connected to the secondary centering joint block 233.

[0041] The main centering joint block 232 and the secondary centering joint block 233 are arc-shaped. Multiple main centering joint blocks 232 are combined to form a circular joint coaxially arranged with the central axis 231. The secondary centering joint block 233 is arranged below the main centering joint block 232. The first driving unit 234 is used to drive the main centering joint block 232 to approach or move away from the central axis 231. The second driving unit 235 is used to drive the secondary centering joint block 233 to approach or move away from the central axis 231 while approaching or moving away from the main centering joint block 232.

[0042] It can be understood that the annular joint surrounded by multiple main centering joint blocks 232 is against the lens, and then a certain pressure is applied to the lens through the translation component 21, and then the annular joint rotates under the action of the rotating component 22. When the lens is centered, there are fewer contact points between the lens and the annular joint, and the force balance cannot be achieved. Then, it will overcome the friction force and move under the action of the centering force perpendicular to the axis of the central axis 231 decomposed by the extrusion force. When the lens stops moving and the lens is stable in the current position and remains unchanged under the rotation and shaking of the rotating component 22, it means that the lens has completed the centering. At this time, due to the symmetrical structure of the lens itself, the forces on both sides are balanced, so that the lens can stably maintain the current position. Then the lens is polished by the edge grinding device. When the centering angle corresponding to the annular joint of the current size and the lens specification is small, the main joint centering block is driven away from the central axis 231 by the first driving unit 234, so that multiple main joint centering blocks form a joint with a larger diameter, which can effectively improve the centering angle and realize high-precision mechanical centering of the lens, and the auxiliary joint centering block will also move synchronously in the direction away from the central axis 231 under the action of the second driving unit 235, and move along the length direction of the axis of the central axis 231, so that the auxiliary joint centering block will fill the gap between the adjacent main joint centering blocks, so that the auxiliary joint centering block and the main joint centering block jointly form a new centering joint, and ensure the contact area and gap between the centering joint and the lens, so as to ensure the stability and accuracy of the centering and edging, and increase the applicable scope of the centering and edging device, and the mechanical centering method itself has a very high centering efficiency. Therefore, the present invention solves the problem in the prior art of lacking an optical lens centering and edging device with high centering accuracy and efficiency and a wide applicable scope.

[0043] It should be noted that the centering coefficient is related to the diameter of the joint and the curvature radius of the lens. When the size of the lens is determined, the centering coefficient is increased by adjusting the position of the main joint centering block and then adjusting the joint diameter, thereby ensuring the accuracy of the mechanical centering method. In addition, the contact area between the joint and the lens affects the stability and consistency of the lens centering. When the contact area is too small, it will cause the local pressure to increase, making the lens surface easy to damage. When the contact area is too large, it is easy to increase the static friction between the joint and the lens, thereby reducing the lens centering speed, or the friction is too large, making it impossible to mechanically center the lens. Therefore, the contact area between the joint and the lens needs to be reasonably adjusted, and then, by setting up an additional auxiliary joint centering block, when a larger joint diameter is required, the lens volume is usually larger, so it is necessary to increase the contact surface between the joint and the lens through the cooperation of the auxiliary joint centering block and the main joint centering block. When the required joint diameter is moderate and there is no need to increase the contact area, at this time, although the main joint centering block moves outward, the auxiliary joint centering block does not completely move to the same horizontal plane as the main joint centering block, that is, the height of the auxiliary joint centering block is lower than the main joint centering block. At this time, the contact area between the joint and the lens does not change. Then, by reasonably adjusting the range of joint diameters within which the auxiliary joint centering block and the main joint centering block cooperate, the contact area can be reasonably adjusted to be within an appropriate range.

[0044] In addition, by way of example but not limitation, in some optional embodiments, multiple auxiliary joint centering blocks can be set, that is, a group of auxiliary joint centering blocks with multiple layers of different heights can be set below the main joint centering block, so as to further increase the application scope of the centering and edging device, and by reasonably adjusting the coordination time of each auxiliary joint centering block with the main joint centering block, the accuracy and effect of the centering and edging device can be improved for different joint diameters.

[0045] In addition, the first driving unit 234 includes a first screw rod 2341, a first slider 2342 sleeved on the first screw rod 2341, and a first connecting plate 2343 connected to the first slider 2342 at one end and connected to the middle part of the main centering block joint at the other end. One end of the central axis 231 is connected to the rotating part 22, and a driving bevel gear 236 is provided on the side of the central axis 231 close to the rotating part 22. The first screw rod 2341 is provided on the side of the central axis 231 close to the central axis 231 with a first driven bevel gear 2344 adapted to the driving bevel gear 236. In the specific implementation, the central shaft 231 is driven to rotate by the rotating component 22, and the central shaft 231 drives all the first screws 2341 to rotate through the active bevel gear 236 and the first driven bevel gear 2344, and then the first slider 2342 drives the main centering joint block 232 to move closer to or away from each other through the cooperation of the first screw 2341 and the threaded hole on the first slide. Since the movement of all the main centering joint blocks 232 is driven by the same active bevel gear 236, the consistency of the movement of the main centering joint block 232 is ensured, and after the joint diameter is adjusted, each main centering joint block 232 is still centrally symmetrically arranged, so that after the lens centering is completed, the forces at each main centering joint block 232 can be balanced and offset, that is, the centering effect of the lens is ensured. And because it is driven by the same active bevel gear 236, there is no need to consider a variety of different assembly conditions when adjusting the assembly error, so as to further avoid the influence of the assembly error on the lens centering and ensure the accuracy of the mechanical centering.

[0046] Specifically, the centering assembly 20 further includes a fixed truncated table 24, on which there is a mounting groove 241, in which the first drive unit 234 and the second drive unit 235 are disposed, one end of the central axis 231 passes through the fixed truncated table 24 and is connected to the rotating component 22, the active bevel gear 236 is disposed at the bottom of the mounting groove 241, and one end of the first screw rod 2341 is rotatably connected to the side wall of the mounting groove 241. In specific implementation, by providing the fixed truncated table 24, the first drive unit 234 and the second drive unit 235 are easily disposed to provide support therefor, and the fixed truncated table 24 is used to protect various components to prevent external collisions and damage to the components.

[0047] In addition, the second driving unit 235 includes a second screw rod 2351, a second slider 2352 sleeved on the second screw rod 2351, and a second connecting plate 2353 having one end connected to the middle of the secondary centering joint block 233 and the other end disposed on the second slider 2352;

[0048] A second driven bevel gear 2354 adapted to the active bevel gear 236 is provided at one end of the second screw rod 2351 close to the central axis 231, and the other end is rotatably connected to the side wall of the mounting groove 241. A connecting portion 2355 is extended outward from the top of the second slider 2352, and a groove 2356 adapted to the second connecting block is provided at the top of the connecting portion 2355. A side of the connecting portion 2355 facing the central axis 231 is provided with an avoidance groove 2357 penetrating the connecting portion 2355. An auxiliary block 242 is extended toward the central axis 231 on the side wall of the mounting groove 241, and an inclined portion 2421 is provided on the side of the auxiliary block 242 away from the side wall of the mounting groove 241.

[0049] The inclined surface 2421 is at least partially located at the bottom of the avoidance groove 2357. The second connecting plate 2353 is placed in the groove 2356 and on the inclined surface 2421 away from the auxiliary centering joint block 233, and is provided with an inclined surface adapted to the inclined surface 2421. In actual use, the second driven bevel gear 2354 is driven to rotate by the rotation of the active bevel gear 236, so that the second slider 2352 is driven to move by the second screw rod 2351. In addition, the inclined surface at the bottom of the second connecting block cooperates with the inclined surface 2421 of the auxiliary block 242, so that the auxiliary centering joint block 233 moves along the axis of the second screw rod 2351 while moving along the axis of the central axis 231, thereby realizing the synergistic effect of the auxiliary centering joint block 233 and the main centering joint block 232. After the diameter of the joint is adjusted, the synergistic effect of the auxiliary centering joint block 233 and the main centering joint block 232 ensures a proper contact area between the lens and the joint, that is, ensures the centering effect of the lens. In addition, since the drive of the auxiliary joint centering block and the main joint centering block are both driven by the same driving source, namely the active bevel gear 236, the synchronous movement of the two is achieved, ensuring the central symmetric distribution of the two joint centering blocks, that is, ensuring that when the lens is centered, the forces will offset each other, thus ensuring the lens centering effect.

[0050] Specifically, the bottom of the first slider 2342 and the second slider 2352 are both provided with a slide groove 2345, and a guide block 243 adapted to the slide groove 2345 is provided in the mounting groove 241. The axes of the first screw rod 2341 and the second screw rod 2351 intersect with the axis of the central axis 231, and the length direction of the guide block 243 is consistent with the axis direction of the first screw rod 2341 or the second screw rod 2351. By setting the slide groove 2345 and the guide block 243 to cooperate and limit the direction of the guide block 243, the moving direction and distance of the main centering joint block 232 and the auxiliary centering joint block 233 are further guaranteed, thereby ensuring the centering effect of the lens.

[0051] In addition, the main centering joint block 232 and the secondary centering joint block 233 have the same curvature, and the secondary centering joint block 233 is located between two adjacent main centering joint blocks 232. The main centering joint block 232 and the secondary centering joint block 233 are both symmetrically arranged relative to the axis of the central axis 231. By adopting the main centering joint block 232 and the secondary centering joint block 233 with the same curvature, when the two work together, the central symmetrical figure surrounded by all the centering joint blocks is more similar to a circle to ensure that the forces can offset each other. It can be understood that when the main centering joint block 232 moves outward, the shape surrounded by each centering joint block is no longer a circle, but by reasonably adjusting the number and curvature of all the centering joint blocks, the figure surrounded by all the centering joint blocks can be approximated to a circle, and it must be a central symmetrical figure, and the points where the joint blocks contact the lens are surrounded to form a central symmetrical figure, which can ensure the accuracy of lens centering. Enclosing to form a nearly circular shape can improve the force condition of the lens and avoid damage to the lens caused by differences in stress conditions inside the lens.

[0052] Specifically, limit blocks 2358 are provided on both sides of the bottom of the second connecting block, and guide grooves 2359 adapted to the limit blocks 2358 are provided on the side walls of the groove 2356. An elastic member 237 is provided in the guide groove 2359, and the two ends of the elastic member 237 are respectively against the top of the limit block 2358 and the inner wall of the top of the guide groove 2359. By providing the limit block 2358 and cooperating with the guide groove 2359, the secondary centering joint block 233 is prevented from shaking and affecting the centering effect of the lens. In addition, by providing the elastic member 237, after the secondary centering joint block 233 moves to the preset position, it is subjected to the squeezing force of the elastic member 237, so that the secondary centering joint block 233 will not be affected by external forces, thereby ensuring the centering effect of the lens.

[0053] In addition, it is characterized in that a vacuum adsorption channel 2311 is provided at one end of the central shaft 231 near the main centering joint block 232, and the other end of the central shaft 231 is connected to a vacuum adsorption device. In addition, in a specific implementation, a vacuum adsorption channel 2311 can also be provided at the end of the central shaft 231, so that when the centering needs to be edged, the central shaft 231 is also used to assist in supporting the lens, thereby allocating the external force of the lens, avoiding force concentration and causing damage to the lens surface. In a specific implementation, a soft material can be used at the end of the central shaft 231 to ensure that the lens will not be worn.

[0054] Specifically, the translation component 21 includes a translation driving member 211, a telescopic rod 212 disposed on the translation driving member 211, and a transmission rod 213 having one end connected to the telescopic rod 212 and the other end connected to the rotating member 22;

[0055] A sliding groove 2121 is provided at the top of the telescopic rod 212, and a limiting round platform 214 adapted to the sliding groove 2121 is provided on the side of the transmission rod 213 close to the telescopic rod 212, and the limiting round platform 214 is placed in the sliding groove 2121;

[0056] The rotating component 22 includes a fixed seat 221 connected to the transmission rod 213, a rotating driving member 222 arranged on the fixed seat 221, and a rotating shaft 223 connected to the rotating driving member 222, the rotating shaft 223 is connected to the central axis 231, and a spring 224 is sleeved on the transmission rod 213, and the two ends of the spring 224 are respectively against the bottom of the fixed seat 221 and the top of the telescopic rod 212. In addition, the spring 224 can adopt a variable pitch spring 224. By setting the variable pitch spring 224, the adjustment range of the force applied by the equidistant spring 224 is more accurate. Due to the nature of the equidistant spring 224, when adjusting the smaller spring 224 force, the telescopic rod 212 needs to be displaced very little, thereby increasing the accuracy requirement for the displacement adjustment of the telescopic rod 212. When the variable pitch spring 224 is adopted, when it is necessary to adjust the smaller spring 224 force, the telescopic rod 212 can be displaced to a certain extent due to the spring 224 segments with different elastic variables, so that the spring 224 segment with a smaller elastic variable than the equidistant spring 224 can be compressed, thereby greatly reducing the accuracy requirement for the displacement adjustment of the telescopic rod 212.

[0057] In addition, the edge grinding assembly 30 includes an axial translation component 3121, a rotating component 32 disposed on the axial translation component 3121, and a grinding piece 33 disposed on the rotating component 32. Specifically, after the centering is completed, the grinding piece 33 is driven to approach or move away from the edge of the lens by the axial translation component 3121, and then the grinding piece 33 is driven to rotate by the rotating component 32 to grind the lens.

[0058] In summary, the present invention uses a circular joint surrounded by multiple main centering joint blocks 232 to abut against the lens, and then applies a certain pressure to the lens through the translation component 21, and then under the action of the rotating component 22, the circular joint rotates. When the lens is centered, there are fewer contact points between the lens and the circular joint, and it is impossible to achieve force balance. Then, it will overcome the friction force and move under the action of the centering force perpendicular to the axis of the central axis 231 decomposed by the extrusion force. When the lens stops moving and the lens stabilizes at the current position and remains unchanged under the rotation and shaking of the rotating component 22, it means that the lens has completed the centering. At this time, due to the symmetrical structure of the lens itself, the forces on both sides are balanced, so that the lens can stably maintain the current position. Then, the lens is polished by the edge grinding device. When the centering angle corresponding to the annular joint of the current size and the lens specification is small, the main joint centering block is driven away from the central axis 231 by the first driving unit 234, so that multiple main joint centering blocks form a joint with a larger diameter, which can effectively improve the centering angle and realize high-precision mechanical centering of the lens, and the auxiliary joint centering block will also move synchronously in the direction away from the central axis 231 under the action of the second driving unit 235, and move along the length direction of the axis of the central axis 231, so that the auxiliary joint centering block will fill the gap between the adjacent main joint centering blocks, so that the auxiliary joint centering block and the main joint centering block jointly form a new centering joint, and ensure the contact area and gap between the centering joint and the lens, so as to ensure the stability and accuracy of the centering and edging, and increase the applicable scope of the centering and edging device, and the mechanical centering method itself has a very high centering efficiency. Therefore, the present invention solves the problem in the prior art of lacking an optical lens centering and edging device with high centering accuracy and efficiency and a wide applicable scope.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An optical lens centering and edging device, characterized in that: It comprises a workbench, a centering assembly and an edge grinding assembly arranged on the workbench, wherein two centering assemblies are symmetrically arranged along the length direction of the workbench, and two edge grinding assemblies are symmetrically arranged along the width direction of the workbench; The centering assembly includes a translation component, a rotation component arranged on the translation component and a centering component arranged on the rotation component, the centering component includes a central axis, a main centering joint block and a secondary centering joint block arranged circumferentially around the central axis, a first driving unit connected to the main centering joint block, and a second driving unit connected to the secondary centering joint block; The main centering joint block and the secondary centering joint block are arc-shaped, and multiple main centering joint blocks are combined to form a circular ring joint coaxially arranged with the central axis. The secondary centering joint block is arranged below the main centering joint block. The first driving unit is used to drive the main centering joint block to approach or move away from the central axis, and the second driving unit is used to drive the secondary centering joint block to approach or move away from the central axis while approaching or moving away from the main centering joint block.

2. The optical lens centering and edging device according to claim 1, characterized in that: The first driving unit includes a first screw rod, a first slider sleeved on the first screw rod, and a first connecting plate connected to the first slider at one end and connected to the middle part of the main centering block joint at the other end. One end of the central shaft is connected to the rotating component, and a driving bevel gear is provided on the side of the central shaft close to the rotating component. A first driven bevel gear adapted to the driving bevel gear is provided on the side of the first screw rod close to the central shaft.

3. The optical lens centering and edging device according to claim 2, characterized in that: The centering assembly also includes a fixed truncated cone having a mounting groove, the first drive unit and the second drive unit are arranged in the mounting groove, one end of the central axis passes through the fixed truncated cone and is connected to the rotating component, the active bevel gear is arranged at the bottom of the mounting groove, and one end of the first screw is rotatably connected to the side wall of the mounting groove.

4. The optical lens centering and edging device according to claim 3, characterized in that: The second driving unit comprises a second screw rod, a second slider sleeved on the second screw rod, and a second connecting plate having one end connected to the middle of the auxiliary centering joint block and the other end arranged on the second slider; The second screw rod is provided with a second driven bevel gear matched with the active bevel gear at one end close to the central axis, and the other end is rotatably connected with the side wall of the mounting groove, a connecting portion is extended outward from the top of the second sliding block, a groove matched with the second connecting block is provided on the top of the connecting portion, an avoidance groove penetrating the connecting portion is provided on the side of the connecting portion facing the central axis, an auxiliary block is extended toward the central axis direction of the side wall of the mounting groove, and an inclined portion is provided on the side of the auxiliary block away from the side wall of the mounting groove; The inclined surface is at least partially located at the bottom of the avoidance groove, and the second connecting plate is placed in the groove and on the inclined surface at one end away from the auxiliary centering joint block, and is provided with an inclined surface adapted to the inclined surface.

5. The optical lens centering and edging device according to claim 4, characterized in that: A slide groove is provided at the bottom of the first slider and the second slider, and a guide block adapted to the slide groove is provided in the installation groove. The axes of the first screw and the second screw intersect with the axis of the central axis, and the length direction of the guide block is consistent with the axis direction of the first screw or the second screw.

6. The optical lens centering and edging device according to claim 1, characterized in that: The main centering joint block and the secondary centering joint block have the same curvature, the secondary centering joint block is located between two adjacent main centering joint blocks, and the main centering joint block and the secondary centering joint block are both symmetrically arranged relative to the axis of the central axis.

7. The optical lens centering and edging device according to claim 4, characterized in that: Limit blocks are provided on both sides of the bottom of the second connecting block, and the side walls of the groove are provided with guide grooves adapted to the limit blocks. An elastic member is provided in the guide groove, and both ends of the elastic member are respectively against the top of the limit block and the inner wall of the top of the guide groove.

8. The optical lens centering and edging device according to any one of claims 1, characterized in that: A vacuum adsorption channel is arranged at one end of the central shaft close to the main centering joint block, and the other end of the central shaft is connected to a vacuum adsorption device.

9. The optical lens centering and edging device according to claim 8, characterized in that: The translation component includes a translation driving member, a telescopic rod arranged on the translation driving member, and a transmission rod having one end connected to the telescopic rod and the other end connected to the rotating member; A sliding groove is provided on the top of the telescopic rod, and a limiting truncated platform adapted to the sliding groove is provided on the side of the transmission rod close to the telescopic rod, and the limiting truncated platform is placed in the sliding groove; The rotating component includes a fixed seat connected to the transmission rod, a rotating drive member arranged on the fixed seat, and a rotating shaft connected to the rotating drive member, the rotating shaft is connected to the central axis, and a spring is sleeved on the transmission rod, and two ends of the spring are respectively against the bottom of the fixed seat and the top of the telescopic rod.

10. The optical lens centering and edging device according to claim 1, characterized in that: The edge grinding assembly includes an axial translation component, a rotating component arranged on the axial translation component, and a grinding piece arranged on the rotating component.

Images