Optical lens external diameter measuring instrument

Abstract

The utility model discloses an optical lens outer diameter measuring instrument, which relates to the technical field of measuring equipment, and comprises a rack, a detection assembly is arranged on the rack, a hollow column is rotatably arranged on the rack, a rotating table is sleeved outside the hollow column, the top surface of the rotating table is a working surface for bearing an optical lens, and the rotating table is provided with a rotating shaft. The top face of the hollow column is flush with the top face of the rotating table, a negative pressure cavity is formed in the hollow column, a negative pressure pump is installed in the rack, the negative pressure end of the negative pressure pump communicates with the negative pressure cavity, and a negative pressure pipe sliding in the axial direction of the hollow column is slidably installed on the top wall of the hollow column. The top end of the negative pressure pipe extends to the position above the hollow column and is connected with a movable disc, and the bottom end of the negative pressure pipe extends into the negative pressure cavity and is connected with a piston plate. Through the automatic ejection design of the movable disc, the lens does not need to be stripped forcibly, edge collision is avoided, the time consumed for taking the lens is shortened, and the existing efficiency shortage is made up.

Description

Technical Field

[0001] This utility model relates to the field of measuring equipment technology, specifically to an optical lens outer diameter measuring instrument. Background Technology

[0002] When measuring the outer diameter of optical lenses, a micrometer is usually used for manual measurement, and the measurement value is manually recorded by the measuring personnel. However, when it is necessary to measure the outer diameter at different locations, there are technical problems such as poor measurement stability, low efficiency, and measurement error.

[0003] An existing patent (application number: CN202122480909.X) proposes an optical lens outer diameter measuring instrument, including a frame, a rotating mechanism, a light source module, a receiving module, and a display module. The rotating mechanism is used to hold the lens and drive the lens to rotate by an angle. The light source module and the receiving module are respectively located on both sides of the rotating mechanism. The display module is electrically connected to the receiving module. The light source module projects light onto the lens to be measured. After receiving the light, the receiving module reads the size information of the part blocked by the lens to obtain the outer diameter of the lens to be measured, and displays the outer diameter through the display module. The rotating mechanism can drive the lens to rotate by an angle to measure the outer diameter at different positions. This application can accurately measure the outer diameter of the lens, has good stability, high measurement efficiency, and can reduce measurement errors.

[0004] However, the rotating mechanism of the measuring instrument, which serves as a worktable for placing the lens, typically has a flat bearing surface to ensure that the lens remains stable and its axis does not shift during the rotation measurement process. However, since the mirror surface of the optical lens itself is also a flat structure, it is difficult for the operator to quickly and easily remove the optical lens from the flat bearing surface of the worktable after the measurement is completed, thus extending the overall time of a single measurement.

[0005] In view of the above, this application is hereby submitted. Utility Model Content

[0006] The purpose of this invention is to provide an optical lens outer diameter measuring instrument to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides an optical lens outer diameter measuring instrument, including a frame on which a detection component is mounted. A hollow column is rotatably mounted on the frame, and a rotating platform is fitted around the hollow column. The top surface of the rotating platform is the working surface for supporting the optical lens. The top surface of the hollow column is flush with the top surface of the rotating platform. The hollow column has a negative pressure chamber inside, and a negative pressure pump is installed inside the frame. The negative pressure end of the negative pressure pump is connected to the negative pressure chamber. A negative pressure tube is slidably mounted on the top wall of the hollow column, sliding along the axial direction of the hollow column. The top end of the negative pressure tube extends above the hollow column and is connected to a movable disc. The bottom end of the negative pressure tube extends into the interior of the negative pressure chamber and is connected to a piston plate. A return spring is connected to the top surface of the piston plate. The other end of the return spring is connected to the inner wall of the negative pressure chamber. Under the initial elastic force of the return spring, the piston plate is pushed upward to push the negative pressure tube and the movable disc away from the hollow column.

[0008] Furthermore, the detection component includes a mounting bracket mounted on a frame, on which a CCD camera and a light source emitting device are disposed. The CCD camera and the light source emitting device are disposed opposite to the rotating stage. A receiving lens is disposed in front of the CCD camera, and a light source lens is disposed in front of the light source emitting device. A controller is mounted on the top of the mounting bracket, and a display screen is disposed on the controller. The CCD camera, the light source emitting device, and the display screen are all electrically connected to the controller.

[0009] Furthermore, a drive motor is installed inside the frame, a driven gear is fixedly installed on the outer wall of the hollow column, and a driving gear is connected to the drive end of the drive motor. The driving gear and the driven gear are meshed together.

[0010] Furthermore, a groove is formed on the top surface of the hollow column, and the movable disc extends into the groove.

[0011] Furthermore, a sliding hole communicating with the negative pressure chamber is provided on the top wall of the hollow column, and the negative pressure tube is slidably connected inside the sliding hole. A sealing ring is also provided on the inner wall of the sliding hole, and the inner wall of the sealing ring is in contact with the outer wall of the negative pressure tube.

[0012] Furthermore, a damping rod is installed on the top wall of the piston plate, the return spring is sleeved on the outside of the damping rod, and the other end of the damping rod is connected to the inner top wall of the negative pressure chamber.

[0013] Furthermore, the inner wall of the piston plate is fitted with the outer wall of the negative pressure tube, and the outer wall of the piston plate is fitted with the inner wall of the negative pressure chamber.

[0014] Furthermore, it also includes a calibration three-jaw chuck, wherein the calibration three-jaw chuck is based on a rotary table, the rotary table is a hollow cylindrical structure with a through-hole at its axial center, the rotary table is sleeved on the hollow column through the through-hole, and the inner sidewall of the rotary table has three radial grooves evenly distributed circumferentially, all three radial grooves communicating with the through-hole; it also includes:

[0015] Three clamping claws are slidably fitted into the three radial grooves in a one-to-one correspondence. Each clamping claw has a meshing tooth on its inner end and a clamping surface on its outer end for contacting the optical lens.

[0016] The transmission mechanism is located inside the rotary table and engages with the meshing teeth of the three clamping jaws. Under the action of external driving force, the three clamping jaws move radially synchronously along the corresponding radial grooves to achieve the calibration of the optical lens.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model features a negative pressure pump that automatically adsorbs and fixes the lens. The controller coordinates the control of the light source emitting device, CCD camera, and drive motor, eliminating the need for manual adjustment of the lens posture or data recording. Compared to traditional manual measurement, this reduces the number of human operation steps. After measurement, turning off the negative pressure pump allows the piston plate and negative pressure tube to be pushed by the reset spring, which in turn drives the movable plate to automatically lift the lens. This avoids the problem of difficulty in retrieving the lens from a flat worktable, shortens the time required for each lens retrieval, and prevents lens damage caused by forced lens retrieval.

[0019] 2. In this utility model, the calibration three-jaw chuck can automatically calibrate the lens to the center of the rotation axis of the rotary table, eliminating the measurement deviation caused by lens eccentricity; secondly, the drive motor drives the active gear and driven gear to drive the rotary table to rotate at a constant speed. With the CCD camera and light source emitting device on the mounting bracket, optical signals of the full circumference position of the lens can be continuously collected. The controller accurately calculates the outer diameter at each position through the algorithm, realizing the detection of multi-dimensional parameters such as ellipticity. Attached Figure Description

[0020] Figure 1 This is a side view of the structure of this utility model;

[0021] Figure 2 This is a front view structural diagram of the present utility model;

[0022] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.

[0024] In the diagram: 1. Frame; 2. Mounting bracket; 3. CCD camera; 4. Receiving lens; 5. Light source emitting device; 6. Light source lens; 7. Controller; 8. Display screen; 9. Rotary table; 10. Drive motor; 11. Hollow column; 12. Driven gear; 13. Driving gear; 14. Negative pressure chamber; 15. Negative pressure pump; 16. Negative pressure pipe; 17. Movable disc; 18. Sealing ring; 19. Piston plate; 20. Return spring; 21. Damping rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 This utility model provides a technical solution: an optical lens outer diameter measuring instrument, including a frame 1, a detection component mounted on the frame 1, a hollow column 11 rotatably mounted on the frame 1, a rotating platform 9 sleeved on the outside of the hollow column 11, the top surface of the rotating platform 9 serving as the working surface for supporting the optical lens, the top surface of the hollow column 11 being flush with the top surface of the rotating platform 9, a negative pressure chamber 14 inside the hollow column 11, a negative pressure pump 15 installed inside the frame 1, the negative pressure end of the negative pressure pump 15 communicating with the negative pressure chamber 14, and the top of the hollow column 11... A negative pressure tube 16 is slidably installed on the wall and slides along the axial direction of the hollow column 11. The top end of the negative pressure tube 16 extends above the hollow column 11 and is connected to a movable plate 17. The bottom end of the negative pressure tube 16 extends into the interior of the negative pressure cavity 14 and is connected to a piston plate 19. A return spring 20 is connected to the top surface of the piston plate 19. The other end of the return spring 20 is connected to the inner wall of the negative pressure cavity 14. Under the initial elastic force of the return spring 20, the piston plate 19 is pushed upward to push the negative pressure tube 16 to drive the movable plate 17 away from the hollow column 11.

[0027] Specifically, in the initial state, the return spring 20 pushes the piston plate 19 upward along the negative pressure chamber 14 inside the hollow column 11 with its initial elastic force, which drives the negative pressure tube 16 fixed with the piston plate 19 to slide upward synchronously, so that the movable plate 17 at the top of the negative pressure tube 16 is higher than the working surface of the rotating table 9 sleeved outside the hollow column 11. The top surface of the rotating table 9 is flush with the top surface of the hollow column 11, which is the lens bearing surface.

[0028] After the operator places the lens on the rotary table 9, the negative pressure pump 15 in the frame 1 is started. Its negative pressure end is connected to the negative pressure chamber 14, so that the negative pressure chamber 14 forms a negative pressure environment. The negative pressure drives the piston plate 19 to move downward against the elastic force of the return spring 20, which drives the negative pressure tube 16 and the movable plate 17 to descend synchronously until the lens is completely attached to the working surface of the rotary table 9. At the same time, the negative pressure adsorbs the lens through the negative pressure tube 16 to achieve stable fixation. After the measurement is completed, the negative pressure pump 15 is turned off, the elastic force of the return spring 20 is released, and the piston plate 19, the negative pressure tube 16 and the movable plate 17 are pushed upward to lift the lens for easy handling.

[0029] As a technical optimization of this utility model, the detection component includes a mounting frame 2 mounted on a frame 1. A CCD camera 3 and a light source emitting device 5 are mounted on the mounting frame 2. The CCD camera 3 and the light source emitting device 5 are positioned opposite the rotating stage 9. A receiving lens 4 is provided on the front side of the CCD camera 3, and a light source lens 6 is provided on the front side of the light source emitting device 5. A controller 7 is mounted on the top of the mounting frame 2, and a display screen 8 is provided on the controller 7. The CCD camera 3, the light source emitting device 5, and the display screen 8 are all electrically connected to the controller 7.

[0030] Specifically, the mounting bracket 2 is fixed on the frame 1, and the CCD camera 3 and the light source emitting device 5 are arranged opposite the rotating stage 9. The receiving lens 4 on the front side of the CCD camera 3 and the light source lens 6 on the front side of the light source emitting device 5 are collinear to ensure that the light path covers the lens. The controller 7 on the top of the mounting bracket 2 is activated, which sends a signal to the light source emitting device 5, causing it to project a parallel light source through the light source lens 6. The outer diameter of the lens blocks part of the light, and the unblocked light is received by the CCD camera 3 through the receiving lens 4. The CCD camera 3 converts the light signal into an electrical signal and transmits it to the controller 7. The controller 7 calculates the outer diameter dimension through a built-in algorithm and displays the result on the display screen 8. The CCD camera 3, the light source emitting device 5, and the display screen 8 are all electrically connected to the controller 7.

[0031] As a technical optimization of this utility model, a drive motor 10 is installed inside the frame 1, a driven gear 12 is fixedly installed on the outer wall of the hollow column 11, and a drive gear 13 is connected to the drive end of the drive motor 10. The drive gear 13 and the driven gear 12 are meshed and connected.

[0032] Specifically, after the drive motor 10 inside the frame 1 starts, its drive end drives the drive gear 13 to rotate; the drive gear 13 meshes with the driven gear 12 fixed on the outer wall of the hollow column 11, driving the hollow column 11 to rotate around the axis; since the rotating table 9 is sleeved outside the hollow column 11, the rotating table 9 rotates synchronously with the hollow column 11, and the lens rotates accordingly, thus cooperating with the CCD camera 3 to realize the detection of the full circumference outer diameter.

[0033] As a technical optimization of this utility model, a groove is provided on the top surface of the hollow column 11, and the movable disk 17 is placed inside the groove.

[0034] Specifically, when the lens presses down on the movable disk 17, the movable disk 17 completely enters the groove, forming a flat bearing surface with the working surface of the rotary table 9 and the top surface of the hollow column 11, ensuring that the lens is placed stably.

[0035] As a technical optimization of this utility model, a sliding hole communicating with the negative pressure chamber 14 is provided on the top wall of the hollow column 11. The negative pressure pipe 16 is slidably connected inside the sliding hole. A sealing ring 18 is also provided on the inner wall of the sliding hole. The inner wall of the sealing ring 18 is in contact with the outer wall of the negative pressure pipe 16.

[0036] Specifically, when the negative pressure pump 15 is working, the sealing ring 18 seals the gap between the sliding hole and the negative pressure pipe 16 to prevent air leakage from the negative pressure chamber 14.

[0037] As a technical optimization of this utility model, a damping rod 21 is installed on the top wall of the piston plate 19, and a return spring 20 is sleeved on the outside of the damping rod 21. The other end of the damping rod 21 is connected to the inner top wall of the negative pressure chamber 14.

[0038] Specifically, a damping rod 21 is installed on the top wall of the piston plate 19, and a return spring 20 is sleeved on the outside of the damping rod 21. The other end of the damping rod 21 is connected to the top wall of the negative pressure chamber 14. When the return spring 20 rebounds and pushes the piston plate 19 upward, the damping rod 21 slows down the rebound speed and suppresses the shaking of the piston plate 19 and the negative pressure tube 16.

[0039] As a technical optimization of this utility model, the inner wall of the piston plate 19 is fitted with the outer wall of the negative pressure tube 16, and the outer wall of the piston plate 19 is fitted with the inner wall of the negative pressure chamber 14.

[0040] Specifically, by sealing the piston plate 19, negative pressure leakage is further eliminated, the problem of unstable lens fixation is solved, and the measurement stability far exceeds that of existing technologies.

[0041] As a technical optimization of this utility model, it also includes a calibration three-jaw chuck. The calibration three-jaw chuck is based on a rotary table 9 as the base plate. The rotary table 9 is a hollow columnar structure with a through central hole in its axial center. The rotary table 9 is sleeved on the hollow column 11 through the central hole. The inner sidewall of the rotary table 9 is evenly provided with three radial grooves along the circumference. All three radial grooves are connected to the central hole.

[0042] Also includes:

[0043] Three gripping claws are slidably fitted into three radial grooves one to one. Each gripping claw has a meshing tooth on its inner end and a gripping surface on its outer end for attaching with the optical lens.

[0044] The transmission mechanism is located inside the rotary table 9 and meshes with the meshing teeth of the three gripping jaws. Under the action of external driving force, the three gripping jaws move radially synchronously along the corresponding radial grooves to achieve the calibration of the optical lens.

[0045] Specifically, by using a three-jaw synchronous calibration, the center of the lens is ensured to coincide with the axis of rotation, thus eliminating the error at its source and achieving a higher standard of measurement accuracy.

[0046] This optical lens outer diameter measuring instrument achieves accurate measurement and convenient handling of optical lens outer diameter through the synergy of mechanical structure and optical detection technology. Its overall working principle is as follows:

[0047] Before measuring the lens, the lens must first be stably positioned. This relies on the cooperation of the hollow column 11, the negative pressure pump 15, the movable plate 17, and the return spring 20. In the initial state, the return spring 20 pushes the piston plate 19 connected to its bottom end to move upward along the negative pressure chamber 14 inside the hollow column 11 due to its initial elastic force. The piston plate 19 is fixedly connected to the bottom end of the negative pressure tube 16 that penetrates the top wall of the hollow column 11. Therefore, the negative pressure tube 16 slides upward synchronously with the piston plate 19, eventually causing the movable plate 17 at the top of the negative pressure tube 16 to be lifted away from the top surface of the hollow column 11. At this time, the movable plate 17 is higher than the working surface of the rotary table 9.

[0048] The operator places the optical lens to be measured on the top surface of the rotary table 9. The rotary table 9 is fitted outside the hollow column 11, and its top surface is the working surface for supporting the lens, and is flush with the top surface of the hollow column 11. At this time, the negative pressure pump 15 installed inside the frame 1 is started, and its negative pressure end is connected to the negative pressure chamber 14 of the hollow column 11. A negative pressure environment is formed in the negative pressure chamber 14. The negative pressure drives the piston plate 19 to move downward. The piston plate 19 drives the negative pressure pipe 16 and the movable disk 17 to move synchronously. At this time, the lens placed on the movable disk 17 is completely in contact with the working surface of the rotary table 9, and the negative pressure pipe 16 generates an adsorption force on the lens above the movable disk 17, firmly fixing the lens to the working surface of the rotary table 9, preventing the lens from shifting during subsequent rotation measurement. At the same time, the sealing ring 18 set in the sliding hole in the top wall of the hollow column 11 can prevent air leakage in the negative pressure chamber 14, ensuring the stability of the negative pressure adsorption.

[0049] To further improve lens positioning accuracy, such as calibrating the alignment of the lens center with the rotation axis of the rotary table 9, a calibration three-jaw chuck structure can be used: the rotary table 9 is a hollow cylindrical structure with three radial grooves evenly distributed along its inner sidewall. The three clamping jaws are slidably fitted into the grooves one by one. When an external driving force, such as a motor, is activated, it drives the transmission mechanism inside the rotary table 9. The transmission mechanism engages with the meshing teeth on the inner end of the clamping jaws, driving the three clamping jaws to move radially synchronously along the radial grooves until the clamping surface on the outer end of the clamping jaws is in contact with the edge of the lens, thus achieving lens center calibration and laying the foundation for subsequent accurate measurements.

[0050] After the lens is positioned, the outer diameter detection stage begins. This stage relies on the coordinated operation of the core detection components, including the mounting bracket 2, CCD camera 3, and light source emitting device 5, along with the drive motor 10 and the rotating stage 9. First, the optical detection path is determined by the mounting bracket 2 mounted on the frame 1: the CCD camera 3 and the light source emitting device 5 are respectively mounted on the mounting bracket 2 and positioned opposite the rotating stage 9. The receiving lens 4 on the front of the CCD camera 3 and the light source lens 6 on the front of the light source emitting device 5 are collinear, ensuring that the optical path is aligned with the lens on the rotating stage 9.

[0051] The controller 7 on top of the mounting bracket 2 is activated. The controller 7 simultaneously sends control signals to the light source emitting device 5 and the CCD camera 3. The light source emitting device 5 projects a parallel light source onto the lens through the light source lens 6. When the light encounters the lens, the outer diameter area of ​​the lens blocks the light. The unblocked light passes through the gap around the lens and shines onto the receiving lens 4 of the CCD camera 3. The CCD camera 3 receives the unblocked light through the receiving lens 4, converts the light signal into an electrical signal, and transmits it to the controller 7. The image processing algorithm built into the controller 7 analyzes the signal, reads the size information of the blocked part of the lens, calculates the outer diameter of the lens, and transmits the measurement result to the display screen 8 set on the controller 7 in real time to realize the visualization of the outer diameter data.

[0052] To measure the outer diameter of a lens at different circumferential positions, such as to detect ellipticity, the controller 7 sends a drive signal to the drive motor 10 inside the frame 1. The drive end of the drive motor 10 drives the connected drive gear 13 to rotate. The drive gear 13 meshes with the driven gear 12 fixed to the outer wall of the hollow column 11, thereby driving the hollow column 11 to rotate around its own axis. Since the rotating stage 9 is fitted outside the hollow column 11, the rotating stage 9 rotates synchronously with the hollow column 11, and the lens it carries also rotates. During the rotation, the CCD camera 3 continuously collects light signals, and the controller 7 continuously calculates and records the outer diameter of the lens at different rotation angles, completing the outer diameter detection across the entire circumference, ensuring the comprehensiveness and accuracy of the measurement.

[0053] After the lens outer diameter measurement is completed, the lens needs to be removed from the rotary table 9. This stage relies heavily on the shutdown of the negative pressure pump 15 and the return spring 20. First, the negative pressure pump 15 is shut off, the negative pressure environment in the negative pressure chamber 14 inside the hollow column 11 disappears, and the suction force of the negative pressure tube 16 on the lens is released. At this time, the piston plate 19 is no longer restricted by the negative pressure, and the initial elastic force of the return spring 20 is released again, pushing the piston plate 19 to move upward along the negative pressure chamber 14. The piston plate 19 drives the negative pressure tube 16 to slide upward synchronously, and the movable disk 17 at the top of the negative pressure tube 16 is lifted upward accordingly, pushing the lens off the working surface of the rotary table 9 to form a gap between the lens and the working surface of the rotary table 9.

[0054] Operators can easily pick up the lens by gently lifting it with the movable plate 17, without having to forcibly peel it off, thus avoiding the risk of damage to the lens edge. At the same time, the automatic ejection function of the movable plate 17 greatly reduces the time required to pick up the lens. In addition, the damping rod 21 installed on the top wall of the piston plate 19 and the return spring 20 are sleeved on its outside, which can play a certain damping role and prevent the return spring 20 from rebounding too quickly and causing the lens to fall off.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An optical lens outer diameter measuring instrument, comprising a frame (1), wherein a detection component is disposed on the frame (1), characterized in that: A hollow column (11) is rotatably mounted on the frame (1). A rotating platform (9) is fitted around the hollow column (11). The top surface of the rotating platform (9) is the working surface for carrying optical lenses. The top surface of the hollow column (11) is flush with the top surface of the rotating platform (9). The hollow column (11) has a negative pressure chamber (14) inside. A negative pressure pump (15) is installed inside the frame (1). The negative pressure end of the negative pressure pump (15) is connected to the negative pressure chamber (14). A negative pressure pump that slides along the axial direction of the hollow column (11) is slidably mounted on the top wall of the hollow column (11). The negative pressure tube (16) extends to the top of the hollow column (11) and is connected to a movable disc (17). The bottom end of the negative pressure tube (16) extends to the inside of the negative pressure cavity (14) and is connected to a piston plate (19). The top surface of the piston plate (19) is connected to a return spring (20). The other end of the return spring (20) is connected to the inner wall of the negative pressure cavity (14). Under the initial elastic force, the return spring (20) pushes the piston plate (19) to move upward, so as to push the negative pressure tube (16) to drive the movable disc (17) away from the hollow column (11).

2. The optical lens outer diameter measuring instrument as described in claim 1, characterized in that: The detection assembly includes a mounting bracket (2) mounted on a frame (1). A CCD camera (3) and a light source emitting device (5) are mounted on the mounting bracket (2). The CCD camera (3) and the light source emitting device (5) are positioned opposite the rotating stage (9). A receiving lens (4) is provided on the front side of the CCD camera (3), and a light source lens (6) is provided on the front side of the light source emitting device (5). A controller (7) is mounted on the top of the mounting bracket (2), and a display screen (8) is provided on the controller (7). The CCD camera (3), the light source emitting device (5), and the display screen (8) are all electrically connected to the controller (7).

3. The optical lens outer diameter measuring instrument as described in claim 1, characterized in that: The frame (1) is equipped with a drive motor (10), and a driven gear (12) is fixedly installed on the outer wall of the hollow column (11). The drive end of the drive motor (10) is connected to a drive gear (13), and the drive gear (13) meshes with the driven gear (12).

4. The optical lens outer diameter measuring instrument as described in claim 1, characterized in that: The top surface of the hollow column (11) is provided with a groove, and the movable disk (17) is inserted into the groove.

5. The optical lens outer diameter measuring instrument as described in claim 1, characterized in that: The top wall of the hollow column (11) is provided with a sliding hole that communicates with the negative pressure chamber (14). The negative pressure tube (16) is slidably connected inside the sliding hole. A sealing ring (18) is also provided on the inner wall of the sliding hole. The inner wall of the sealing ring (18) is in contact with the outer wall of the negative pressure tube (16).

6. The optical lens outer diameter measuring instrument as described in claim 1, characterized in that: A damping rod (21) is installed on the top wall of the piston plate (19), and the return spring (20) is sleeved on the outside of the damping rod (21). The other end of the damping rod (21) is connected to the inner top wall of the negative pressure chamber (14).

7. The optical lens outer diameter measuring instrument as described in claim 1, characterized in that: The inner wall of the piston plate (19) is in contact with the outer wall of the negative pressure tube (16), and the outer wall of the piston plate (19) is in contact with the inner wall of the negative pressure chamber (14).

8. The optical lens outer diameter measuring instrument as described in claim 1, characterized in that: It also includes a calibration three-jaw chuck, the calibration three-jaw chuck is based on a rotary table (9) as the base plate, the rotary table (9) is a hollow columnar structure, and a through central hole is opened in its axial center. The rotary table (9) is sleeved on the hollow column (11) through the central hole, and three radial grooves are evenly opened in the circumferential direction on the inner sidewall of the rotary table (9). All three radial grooves are connected to the central hole. Also includes: Three clamping claws are slidably fitted into the three radial grooves in a one-to-one correspondence. Each clamping claw has a meshing tooth on its inner end and a clamping surface on its outer end for contacting the optical lens. The transmission mechanism is located inside the rotary table (9) and meshes with the meshing teeth of the three clamping claws. Under the action of external driving force, the three clamping claws move radially synchronously along the corresponding radial grooves to achieve the calibration of the optical lens.

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