Lens curvature detection device and detection method thereof

Abstract

The invention provides a lens curvature detection device and a detection method thereof, and relates to the technical field of lens detection, the device comprises a detection fixing seat, a first sensing module, a second sensing module, a lens clamping driving mechanism and a controller; the first sensing module and the second sensing module are located on the left side and the right side of the detection fixing base respectively. The first sensing module is provided with a first contact sensing part abutting against a detected lens. A second contact sensing part is arranged on the second sensing module; the lens clamping driving mechanism is used for clamping a lens and driving the lens to realize mobile positioning and rotary positioning; the controller is electrically connected with the first sensing module, the second sensing module and the lens clamping driving mechanism. The device has the advantages that the contact sensing part on the sensing module is matched with the upper lens clamping driving mechanism to detect the curvature of the surfaces of the two sides A and B of the lens in the up-and-down and left-and-right displacement and rotation processes, the original design is overturned, and the detection accuracy and stability can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of lens detection, and in particular to a lens curvature detection device and a detection method thereof. Background Art

[0002] The existing lens curvature detection method is to clamp the two axial end faces at the center of the lens through two clamping rods in the lens clamping drive mechanism, and drive the lens to achieve mobile positioning and rotational positioning through the two clamping rods; when detecting the lens, the lens is driven to move to the lens detection position by the lens clamping drive mechanism, and the two axial end faces of the outer edge of the lens are lightly clamped by two contact clamping blocks at the detection position. After clamping, the lens between the two clamping rods is driven to rotate axially under the rotation action of the lens clamping drive mechanism. During the rotation process, the two contact clamping blocks are always lightly pressed against the lens surface. As the surface curvature corresponding to different circumferential positions of the lens during the rotation process is different, the axial distance between the two contact clamping blocks will change with the different surface curvatures, and then the data of the lens surface detected by the contact clamping blocks are read through the locator values ​​on the two contact clamping blocks, and finally the curvature of the two axial end faces of the lens can be calculated through the data.

[0003] Through the above detection method, firstly, the structure of the entire device is relatively complex, resulting in a high failure rate and alarm rate of the entire structure, and directly detecting through the locators on the two contact clamps requires very high accuracy requirements for the locators, resulting in high costs for the locators and maintenance costs for the entire device. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing detection method has a relatively complex structure, and has a high failure rate and cost. In order to overcome the above defects of the prior art, the present invention provides a contact sensing part on the sensor module that subverts the original design, and at the same time cooperates with the lens clamping drive mechanism. The overall structure is simpler and more convenient, and there is no need to use a high-precision positioner, which reduces costs. At the same time, it can also ensure the accuracy and stability of detection and reduce the failure rate and alarm rate.

[0005] For the purpose of the present invention, the following technical solutions are adopted to achieve the goal: A lens curvature detection device comprises a detection fixing seat, a first sensor module, a second sensor module, a lens clamping drive mechanism and a controller; the first sensor module and the second sensor module are respectively arranged on the left and right sides of the detection fixing seat; the first sensor module is provided with a first contact sensing part abutting against the surface of one side of the lens to be tested, and the first sensor module feeds back the contact point position of one side of the lens through the first contact sensing part; the second sensor module is provided with a second contact sensing part abutting against the surface of the other side of the lens to be tested; and the second sensor module feeds back the contact point position of the other side of the lens through the second contact sensing part; the lens clamping drive mechanism is used to clamp the lens and drive the lens to achieve mobile positioning and rotational positioning; the controller is electrically connected to the first sensor module, the second sensor module and the lens clamping drive mechanism respectively, and the controller is used to control the first contact sensing part and the second contact sensing part to produce a certain deformation and ensure that the deformation amount does not change, and control the lens clamping drive mechanism to perform mobile positioning and rotational positioning, and finally obtain the curvature of the surfaces on both sides of the lens through the data fed back by the lens clamping drive mechanism. The device uses the contact sensing part structure on the sensor module to ensure that when the lens is against the contact sensing part, the contact sensing part always produces a certain deformation and the deformation amount does not change, so that it can cooperate with the existing lens clamping drive mechanism to detect the curvature of the front and rear surfaces of one side of the lens during the movement, positioning and rotation process, and the first sensor module and the second sensor module on both sides can successively detect the AB surface of the lens, which subverts the original design, has a simpler structure, does not need to use a high-precision positioner, reduces costs, and can also ensure the accuracy and stability of detection, reducing failure rate and error rate.

[0006] Preferably, the first sensing module includes a first contact plate and a first sensor; the upper end of the first contact plate is fixedly connected to the detection fixing seat, the lower end of the first contact plate is suspended, and the first contact sensing part is arranged at the lower end of the first contact plate; the first sensor is arranged on the first contact plate, and the first sensor is used to feedback the deformation amount generated by the first contact plate after being squeezed by the lens. The first sensor can perform one-to-one detection feedback on the first contact plate to ensure the accuracy of the detection.

[0007] Preferably, the second sensing module includes a second contact plate and a second sensor; the upper end of the second contact plate is fixedly connected to the detection fixing seat, the lower end of the second contact plate is suspended, and the second contact sensing part is arranged at the lower end of the second contact plate, the second sensor is arranged on the second contact plate, and the second sensor is used to feedback the deformation amount of the second contact plate after being squeezed by the lens. The second sensor can perform one-to-one detection feedback on the second contact plate to ensure the accuracy of the detection.

[0008] Preferably, the first contact sensing part is a first contact protrusion, which is laterally protruding and arranged on the bottom outer wall of the first contact plate; the second contact sensing part is a second contact protrusion, which is laterally protruding and arranged on the bottom outer wall of the second contact plate; the second contact protrusion is arranged in the opposite direction to the first contact protrusion; and the outer end surfaces of the first contact protrusion and the second contact protrusion are both arc-shaped. The first contact sensing part and the second contact sensing part are in the form of protrusions and laterally protrude from the contact plate, so that they can better contact with the lens, thereby facilitating better maintaining a certain deformation.

[0009] Preferably, the first sensor and the second sensor are both contact sensors, and the contact sensors are used to provide real-time feedback of the deformation of the contact plate; the first sensor is vertically arranged on the outer wall of the first contact plate, and the second sensor is vertically arranged on the outer wall of the second contact plate. The contact sensors are used to facilitate real-time detection of the deformation of the first contact plate and the second contact plate.

[0010] Preferably, the lens clamping drive mechanism comprises a first clamping rod, a second clamping rod and a driving module; the first clamping rod and the second clamping rod are respectively movably connected to the lateral sides of the driving module, and the first clamping rod and the second clamping rod are coaxially arranged; the driving module is electrically connected to the controller, and the driving module comprises a clamping drive unit, a rotation drive unit, a lateral moving unit, a vertical moving unit and a front-to-back moving unit; the clamping drive unit realizes the clamping and loosening of the first clamping rod and the second clamping rod under the action of the controller; the rotation drive unit realizes the synchronous rotation of the first clamping rod and the second clamping rod under the action of the controller; the lateral moving unit realizes the synchronous movement of the first clamping rod and the second clamping rod in the lateral direction under the action of the controller; the vertical moving unit realizes the synchronous movement of the first clamping rod and the second clamping rod in the vertical direction under the action of the controller; the front-to-back moving unit realizes the synchronous movement of the first clamping rod and the second clamping rod in the front-to-back direction under the action of the controller. The clamping drive unit, the rotation drive unit, the lateral moving unit, the vertical moving unit and the front-to-back moving unit in the driving module realize the clamping, moving positioning and rotation positioning of the lens.

[0011] Preferably, the driving module is also provided with a displacement encoder, which can judge the curvature of the lens by feeding back the motion trajectory of the driving module with the code value on the displacement encoder by keeping the contact plate to produce a certain deformation and keeping the deformation unchanged. By adding a displacement encoder to the lens clamping drive mechanism, the accuracy of detecting the curvature of the lens by the motion trajectory of the driving module can be further ensured. At the same time, the displacement encoder detection method is used to replace the original sensor detection method, which not only saves costs, but also further improves the stability and accuracy of detection, and reduces the failure rate and error rate.

[0012] A lens curvature detection method, using the above lens curvature detection device, comprises the following steps: S1, lens clamping: clamping the lens by a lens clamping driving mechanism, and moving and positioning the lens by the lens clamping driving mechanism, so that the first contact sensing part of the first sensing module is within the contour range of the lens to be measured after the lens is moved and positioned; S2, positioning of the lens surface A: the lens is driven to move horizontally by the lens clamping drive mechanism, and the data state of the first sensor module is read in real time by the controller during the translation process. When the lens surface abuts against the first contact sensor part, the controller reads the current displacement of the first contact sensor part through the first sensor module; S3. Measurement of curvature of lens surface A: The controller controls the lens clamping drive mechanism to drive the lens to rotate. During the rotation process, the controller reads and records the displacement (deformation) of the first contact sensing part in real time. Since the lens exerts different pressures on the first contact sensing part at different angles, the displacement of the first contact sensing part is kept constant by controlling the movement of the lens clamping drive mechanism. After the lens rotates one circle, the controller can calculate the curvature of surface A of the measured lens based on the data recorded by the first sensor module and the lens clamping drive mechanism. S4, measurement of curvature of lens surface B: after completing the measurement of curvature of lens surface A, measure the curvature of lens surface B; the controller controls the lens clamping drive mechanism to drive the lens to move, so that the lens is separated from the first contact sensing part, and the lens is abutted against the second contact sensing part of the second sensing module on the other side for detecting surface B; according to the steps S1 to S3, continue to complete the detection of surface B and calculate the curvature of surface B of the lens.

[0013] Preferably, during the positioning process of the lens surface A, when the lens surface contacts the first contact sensing part, the lens is continued to be controlled to move toward the first contact sensing part for a distance d and then stop, and the distance d is preferably in the range of 0.2-0.5mm; the controller reads the current displacement (deformation) of the first contact sensing part through the first sensor module, that is, records the distance d value and the left and right position value x of the lens clamping drive mechanism.

[0014] Preferably, during the measurement of the curvature of the lens surface A, the controller controls the lens clamping drive mechanism to keep the displacement of the first contact sensing part unchanged, and the optimal value range is preferably 0.2-0.5mm. At each rotation angle, the controller records the angle value θ corresponding to the lens, the left and right position values ​​x and the height position y corresponding to the lens clamping drive mechanism, and the displacement d corresponding to the contact sensor; when the lens rotates one circle, the controller calculates and obtains the curvature of the A surface of the lens being measured based on the recorded data set (θ-xyd).

[0015] In summary, the advantage of the present invention is that the device can ensure that when the lens is against the contact plate, the contact plate always produces a certain deformation and the deformation amount does not change by cooperating with the existing lens clamping drive mechanism to detect the curvature of the surfaces on both sides of the lens AB during the up and down, left and right displacement and rotation process, which subverts the original design of clamping the contact block with the locator. The structure is simpler and no high-precision locator is needed, which reduces costs. At the same time, the accuracy and stability of detection can also be guaranteed. Through the displacement encoder in the lens clamping drive mechanism, the accuracy of detecting the curvature of the lens by positioning the motion trajectory of the drive module can be further ensured. At the same time, the displacement encoder detection method is used to replace the original locator detection method, which not only saves costs, but also further improves the stability and accuracy of detection, and reduces the failure rate and error rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a lens curvature detection device of the present invention.

[0017] Figure 2 It is a partial enlarged view of the lens curvature detection device of the present invention.

[0018] Description of reference numerals: 1. Bracket; 2. Detection fixing seat; 21. Limit block; 3. First contact plate; 30. First deformation gap; 31. First contact protrusion; 4. Second contact plate; 40. Second deformation gap; 41. Second contact protrusion; 5. First sensor; 6. Second sensor; 7. First clamping rod; 8. Second clamping rod; 9. Drive module. DETAILED DESCRIPTION

[0019] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0020] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0021] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 to Figure 2 As shown, a lens curvature detection device comprises a bracket 1, a detection fixing seat 2, a first sensor module, a second sensor module, a lens clamping drive mechanism and a controller; the detection fixing seat 2 is vertically arranged on the bracket 1, and the first sensor module and the second sensor module are respectively arranged on the left and right sides of the detection fixing seat 2; the first sensor module is provided with a first contact sensing portion abutting against the surface of one side of the lens to be tested, and the first sensor module feeds back the contact point position of one side of the lens (the deformation amount generated by the compression of one side of the lens) through the first contact sensing portion; the second sensor module is provided with a second contact sensing portion abutting against the surface of the other side of the lens to be tested; and the second sensor module The block feeds back the position of the contact point on the other side of the lens (the deformation amount generated by the lens being squeezed) through the second contact sensing part; the lens clamping driving mechanism is used to clamp the lens and drive the lens to achieve mobile positioning and rotational positioning; the controller is electrically connected to the first sensing module, the second sensing module and the lens clamping driving mechanism, respectively, and the controller is used to read the states of the first sensing module and the second sensing module (control the first contact sensing part and the second contact sensing part to read and output a certain deformation and ensure that the deformation amount does not change), and control the lens clamping driving mechanism to perform mobile positioning and rotational positioning, and finally obtain the curvature of the surfaces on both sides of the lens through the data fed back by the lens clamping driving mechanism. The device uses the contact sensing part structure on the sensor module to ensure that when the lens is against the contact sensing part, the contact sensing part always produces a certain deformation and the deformation amount does not change, so that it can cooperate with the existing lens clamping drive mechanism to detect the curvature of the front and rear surfaces of one side of the lens during the movement, positioning and rotation process, and the first sensor module and the second sensor module on both sides can successively detect the AB surface of the lens, which subverts the original design, has a simpler structure, does not need to use a high-precision positioner, reduces costs, and can also ensure the accuracy and stability of detection, reducing failure rate and error rate.

[0024] like Figure 1 and Figure 2As shown, the first sensing module includes a first contact plate 3 and a first sensor 5, and the second sensing module includes a second contact plate 4 and a second sensor 6; the detection fixing seat 2 is vertically arranged on the bracket 1, and the first contact plate 3 and the second contact plate 4 are respectively vertically arranged on the left and right sides of the detection fixing seat 2, and the first contact plate 3 and the second contact plate 4 are arranged symmetrically. The upper end of the first contact plate 3 is fixedly connected to the detection fixing seat 2, and the lower end of the first contact plate 3 is suspended, and the lower end of the first contact plate 3 is provided with a first contact sensing portion abutting against the right side surface of the lens, and the first sensor 5 is vertically arranged on the left side wall of the first contact plate 3, and the first sensor 5 is used to feedback the deformation amount of the first contact plate 3 in real time. In this embodiment, the first sensor 5 is a contact sensor, and the deformation amount of the first contact plate 3 is conveniently fed back in real time by using the contact sensor. The upper end of the second contact plate 4 is fixedly connected to the detection fixing seat 2, the lower end of the second contact plate 4 is suspended, and the lower end of the second contact plate 4 is provided with a second contact sensing portion that abuts against the left surface of the lens; the second sensor 6 is vertically arranged on the right side wall of the second contact plate 4, and the second sensor 6 is used to provide real-time feedback on the deformation of the second contact plate 4. In this embodiment, the second sensor 6 is also a contact sensor, which facilitates real-time feedback on the deformation of the first contact plate 3 by using the contact sensor.

[0025] In this embodiment, the detection fixing seat 2, the first contact plate 3, and the second contact plate 4 are integrally formed, so as to facilitate production and manufacturing, and also ensure the strength and hardness of the overall structure, prevent the connection from being broken, and further improve the service life. In this embodiment, the first contact plate 3 and the second contact plate 4 are strain gauges, which can facilitate the feedback of the deformation amount. The lens clamping drive mechanism is used to clamp the lens and drive the lens to achieve mobile positioning and rotational positioning; the controller is electrically connected to the first sensor 5, the second sensor 6 and the lens clamping drive mechanism respectively, and the controller is used to control the first contact plate 3 and the second contact plate 4 to produce a certain deformation and ensure that the deformation amount does not change, and control the lens clamping drive mechanism to move and rotate the positioning, and finally obtain the curvature of the surface of one side of the lens through the data fed back by the lens clamping drive mechanism. The device cooperates with the sensor on the contact plate to ensure that when the lens is against the contact plate, the contact plate always produces a certain deformation and the deformation amount does not change, so that it can cooperate with the existing lens clamping drive mechanism to detect the curvature of the front and rear surfaces of one side of the lens during the movement, positioning and rotation process. It subverts the original design, has a simpler structure, does not need to use a high-precision positioner, reduces costs, and can also ensure the accuracy and stability of detection, reducing failure rate and error rate.

[0026] like Figure 2As shown, the first contact sensing part is a first contact protrusion 31, which is horizontally protruding and arranged on the lower part of the left side wall of the first contact plate 3. The first contact sensing part protrudes from the first contact plate 3, which can facilitate better contact with the lens, and at the same time, it can facilitate better force on the first contact protrusion 31, so as to facilitate better maintenance of a certain deformation. The second contact sensing part is a second contact protrusion 41, which is horizontally protruding and arranged on the lower part of the right side wall of the second contact plate 4, and the first contact protrusion 31 and the second contact protrusion 41 are symmetrically arranged in opposite directions. The first contact sensing part and the second contact sensing part are in the form of protrusions, and horizontally protrude from the contact plate, which can facilitate better contact with the lens, so as to facilitate better maintenance of a certain deformation. At the same time, the outer end faces of the first contact protrusion 31 and the second contact protrusion 41 are arc-shaped, and the arc-shaped surface can prevent the lens surface from being scratched during rotation.

[0027] In this embodiment, Figure 2 As shown, a vertically distributed limit block 21 is integrally formed at the bottom of the detection fixing seat 2, and the limit block 21 is located in the middle of the first contact plate 3 and the second contact plate 4 and the three are arranged in parallel and spaced apart, and a first deformation gap 30 is arranged between the first contact plate 3 and the left side wall of the limit block 21, and a second deformation gap 40 is arranged between the second contact plate 4 and the right side wall of the limit block 21. On the basis of ensuring that the first contact plate 3 and the second contact plate 4 can be deformed, the limit block 21 can enhance the supporting performance of the entire detection fixing seat 2, and at the same time, it is also convenient to horizontally limit the first contact plate 3 and the second contact plate 4 to prevent the first contact plate 3 and the second contact plate 4 from being damaged due to excessive deformation.

[0028] like Figure 1 and Figure 2As shown, the lens clamping drive mechanism is an existing structure for clamping and driving the lens to move and rotate. The lens clamping drive mechanism includes a first clamping rod 7, a second clamping rod 8 and a driving module 9; the first clamping rod 7 and the second clamping rod 8 are respectively movably connected to the lateral sides of the driving module 9, and the first clamping rod 7 and the second clamping rod 8 are coaxially arranged; the driving module 9 is electrically connected to the controller, and the driving module 9 includes a clamping drive unit, a rotation drive unit, a lateral movement unit, a vertical movement unit and a front-back movement unit; the clamping drive unit realizes the clamping and loosening of the first clamping rod 7 and the second clamping rod 8 under the action of the controller, and the clamping drive unit is driven by a servo motor or a cylinder. The rotation drive unit realizes the synchronous rotation of the first clamping rod 7 and the second clamping rod 8 under the action of the controller, and the rotation drive unit is driven by a servo motor. The lateral movement unit realizes the synchronous movement of the first clamping rod 7 and the second clamping rod 8 in the lateral direction under the action of the controller, and the lateral movement unit is driven by a servo motor or a cylinder. The vertical movement unit realizes the synchronous movement of the first clamping rod 7 and the second clamping rod 8 in the vertical direction under the action of the controller, and the vertical movement unit is driven by a servo motor or a cylinder. The front-to-back moving unit realizes the synchronous movement of the first clamping rod 7 and the second clamping rod 8 in the front-to-back direction under the action of the controller, and the front-to-back moving unit is realized by a servo motor or a cylinder drive. The clamping drive unit, the rotation drive unit, the lateral moving unit, the vertical moving unit and the front-to-back moving unit in the driving module 9 realize the clamping, moving positioning and rotation positioning of the lens. Since the lens clamping driving mechanism is an existing structure, the specific working principle is not repeated here. A displacement encoder is also provided on the driving module 9. By keeping the contact plate outputting a certain deformation and keeping the deformation amount unchanged, the code value on the displacement encoder is fed back to the motion trajectory of the driving module 9 to judge the curvature of the lens. By adding a displacement encoder to the lens clamping driving mechanism, the accuracy of the curvature of the lens detected by the motion trajectory of the driving module 9 can be further ensured. At the same time, the displacement encoder detection method is used to replace the original sensor detection method, which not only saves costs, but also further improves the stability and accuracy of detection, and reduces the failure rate and error rate.

[0029] A lens curvature detection method, using the lens curvature detection device, comprises the following four steps in sequence: S1, lens clamping: the lens is fixedly clamped between the first clamping rod 7 and the second clamping rod 8 in the lens clamping driving mechanism, the clamped lens is moved and positioned by the lens clamping driving mechanism, and the first contact protrusion 31 of the first contact plate 3 is within the contour range of the measured lens through the lens moving and positioning; The specific process is as follows: the first clamping rod 7 and the second clamping rod 8 are driven to approach each other through the clamping driving unit on the driving module 9 in the lens clamping driving mechanism, so that the first clamping rod 7 and the second clamping rod 8 are clamped in the middle of the lens; the clamped lens is moved to the vicinity of the first contact protrusion 31 of the first contact plate 3 through the cooperation of the lateral moving unit, the vertical moving unit and the front-back moving unit on the driving module 9, and it is ensured that the first contact protrusion 31 is within the contour range of the lens to be measured.

[0030] S2, lens surface A positioning: the lens clamping drive mechanism drives the lens to move horizontally through the drive module 9, and the controller reads the data state of the first sensor 5 in real time during the translation process. When the lens surface abuts against the first contact protrusion 31, the controller reads the current displacement of the first contact plate 3 through the first sensor 5; The specific process is as follows: after the lens clamping driving mechanism moves the lens to the positioning position through the driving module 9, the clamped lens is driven by the lateral moving unit to slowly approach and abut against the first contact protrusion 31 of the first contact plate 3. During the translation process, the controller reads the data state of the first sensor 5 on the first contact plate 3 in real time. When the surface of the lens contacts the first contact protrusion 31 of the first contact plate 3, the lens is continuously controlled to move toward the first contact sensing portion for a distance d and then stops. The preferred range of the distance d is 0.2-0.5 mm; 0.3 mm is preferred in this embodiment. After moving the distance d, the controller reads the displacement (deformation) of the first sensor 5 on the current first contact plate 3, that is, the distance d value and the left and right position value x of the lateral moving unit on the lens clamping machine. S3, measurement of curvature of lens surface A: the controller controls the driving module 9 in the lens clamping driving mechanism to drive the lens to rotate. During the rotation process, the controller reads and records the displacement (deformation) of the first contact plate 3 in real time. Since the lens exerts different pressures on the first contact plate 3 at different angles, the displacement of the first contact plate 3 is kept constant by controlling the movement of the lens clamping driving mechanism. After the lens rotates one circle, the controller can calculate the curvature of surface A of the measured lens according to the data recorded by the first sensor 5 and the lens clamping driving mechanism. The specific process is as follows: the controller controls the rotation drive unit in the lens clamping drive mechanism to rotate at a constant speed, and the lens clamping drive mechanism controls the lens to move up and down under the action of the vertical moving unit according to the outer contour shape of the lens. Because there is curvature on the surface of the lens, the amount of pressure exerted by the lens on the first contact plate 3 is different at different angles, so that the controller reads and records the displacement of the first sensor 5 on the first contact plate 3 in real time, and controls the movement of the lens clamping drive mechanism through the controller to keep the displacement of the first contact plate 3 unchanged, so that the displacement (deformation) of the first sensor 5 preferably has an optimal value range of 0.2-0.5mm, and 0.3mm is preferred in this embodiment; finally, the curvature of the lens is fed back through the value of the lens clamping drive mechanism, and at each rotation angle, the controller records the corresponding angle value θ, the left and right position value x of the lens clamping drive mechanism, the height position y and the displacement d of the first sensor 5; when the lens rotates one circle, the controller can calculate the curvature of the A surface of the measured lens according to the recorded data set (θ-xyd).

[0031] S4, measurement of curvature of lens surface B: after completing the curvature measurement of lens surface A, measure the curvature of lens surface B; the controller controls the lens clamping drive mechanism to drive the lens to move, so that the lens is separated from the first contact protrusion 31 of the first contact plate 3, and the lens is abutted against the second contact protrusion 41 of the second contact plate 4 on the other side for detecting surface B; according to the steps of S1 to S3, continue to complete the detection of surface B, and calculate the curvature of lens surface B. Both sides of the lens AB can be detected by the contact plates on both sides, which greatly improves the detection efficiency.

[0032] The advantage of the present invention is that the original design has a simpler structure and no high-precision positioner is needed, which reduces costs. The contact plates on both sides cooperate with the sensors on both sides to ensure that when the lens is against the contact plate, the contact plate always produces a certain deformation and the deformation amount does not change, so that it can cooperate with the existing lens clamping drive mechanism to detect the surface curvature of the lens during the movement, positioning and rotation process, and the first contact plate 3 and the second contact plate 4 on the left and right sides can directly realize the detection of the two surfaces AB of the lens without manual surface changing, thereby further improving the convenience and practicality of detection.

[0033] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0034] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A lens curvature detection device, characterized in that: The invention comprises a detection fixing seat (2), a first sensor module, a second sensor module, a lens clamping drive mechanism and a controller; the first sensor module and the second sensor module are respectively arranged on the left and right sides of the detection fixing seat (2); the first sensor module is provided with a first contact sensing portion abutting against the surface of one side of the lens to be tested, and the first sensor module feeds back the position of the contact point on one side of the lens through the first contact sensing portion; the second sensor module is provided with a second contact sensing portion abutting against the surface of the other side of the lens to be tested; and the second sensor module feeds back the position of the contact point on the other side of the lens through the second contact sensing portion; the lens clamping drive mechanism is used to clamp the lens and drive the lens to achieve mobile positioning and rotational positioning; the controller is respectively electrically connected to the first sensor module, the second sensor module and the lens clamping drive mechanism, and the controller is used to read the states of the first sensor module and the second sensor module, and control the lens clamping drive mechanism to perform mobile positioning and rotational positioning, and finally obtain the curvature of the surfaces on both sides of the lens through the data fed back by the lens clamping drive mechanism.

2. The lens curvature detection device according to claim 1, characterized in that: The first sensing module comprises a first contact plate (3) and a first sensor (5); the upper end of the first contact plate (3) is fixedly connected to the detection fixing seat (2), the lower end of the first contact plate (3) is suspended, and the first contact sensing part is arranged at the lower end of the first contact plate (3); the first sensor (5) is arranged on the first contact plate (3), and the first sensor (5) is used to feedback the deformation amount generated by the first contact plate (3) after being squeezed by the lens.

3. The lens curvature detection device according to claim 2, characterized in that: The second sensing module comprises a second contact plate (4) and a second sensor (6); the upper end of the second contact plate (4) is fixedly connected to the detection fixing seat (2), the lower end of the second contact plate (4) is suspended, and the second contact sensing portion is arranged at the lower end of the second contact plate (4), the second sensor (6) is arranged on the second contact plate (4), and the second sensor (6) is used to feedback the deformation amount of the second contact plate (4) generated after being squeezed by the lens.

4. The lens curvature detection device according to claim 3, characterized in that: The first contact sensing portion is a first contact protrusion (31), which is laterally protruding and arranged on the bottom outer wall of the first contact plate (3); the second contact sensing portion is a second contact protrusion (41), which is laterally protruding and arranged on the bottom outer wall of the second contact plate (4); the second contact protrusion (41) is arranged in the opposite direction to the first contact protrusion (31); and the outer end surfaces of the first contact protrusion (31) and the second contact protrusion (41) are both arc-shaped.

5. The lens curvature detection device according to claim 3, characterized in that: The first sensor (5) and the second sensor (6) are both contact sensors, and the contact sensors are used to provide real-time feedback of the deformation of the contact plate; the first sensor (5) is vertically arranged on the outer wall of the first contact plate (3), and the second sensor (6) is vertically arranged on the outer wall of the second contact plate (4).

6. The lens curvature detection device according to claim 1, characterized in that: The lens clamping drive mechanism comprises a first clamping rod (7), a second clamping rod (8) and a drive module (9); the first clamping rod (7) and the second clamping rod (8) are respectively movably connected to the lateral sides of the drive module (9), and the first clamping rod (7) and the second clamping rod (8) are coaxially arranged; the drive module (9) is electrically connected to a controller, and comprises a clamping drive unit, a rotation drive unit, a lateral movement unit, a vertical movement unit and a front-to-back movement unit; the clamping drive unit realizes the clamping and loosening of the first clamping rod (7) and the second clamping rod (8) under the action of the controller; the rotation drive unit realizes the synchronous rotation of the first clamping rod (7) and the second clamping rod (8) under the action of the controller; the lateral movement unit realizes the synchronous movement of the first clamping rod (7) and the second clamping rod (8) in the lateral direction under the action of the controller; the vertical movement unit realizes the synchronous movement of the first clamping rod (7) and the second clamping rod (8) in the vertical direction under the action of the controller; and the front-to-back movement unit realizes the synchronous movement of the first clamping rod (7) and the second clamping rod (8) in the front-to-back direction under the action of the controller.

7. The lens curvature detection device according to claim 6, characterized in that: The driving module (9) is also provided with a displacement encoder, which, by maintaining a certain deformation of the contact plate and maintaining the deformation amount unchanged, implements code value feedback on the displacement encoder to the motion trajectory of the driving module (9) to judge the curvature of the lens.

8. A method for detecting curvature of a lens, characterized in that: The lens curvature detection device according to claims 1 to 7 comprises the following steps: S1, lens clamping: clamping the lens by a lens clamping driving mechanism, and moving and positioning the lens by the lens clamping driving mechanism, so that the first contact sensing part of the first sensing module is within the contour range of the lens to be measured after the lens is moved and positioned; S2, positioning of the lens surface A: the lens is driven to move horizontally by the lens clamping drive mechanism, and the data state of the first sensor module is read in real time by the controller during the translation process. When the lens surface abuts against the first contact sensor part, the controller reads the current displacement of the first contact sensor part through the first sensor module; S3. Measurement of curvature of lens surface A: The controller controls the lens clamping drive mechanism to drive the lens to rotate. During the rotation process, the controller reads and records the displacement (deformation) of the first contact sensing part in real time. Since the lens exerts different pressures on the first contact sensing part at different angles, the displacement of the first contact sensing part is kept constant by controlling the movement of the lens clamping drive mechanism. After the lens rotates one circle, the controller can calculate the curvature of surface A of the measured lens based on the data recorded by the first sensor module and the lens clamping drive mechanism. S4, measurement of curvature of lens surface B: after completing the measurement of curvature of lens surface A, measure the curvature of lens surface B; the controller controls the lens clamping drive mechanism to drive the lens to move, so that the lens is separated from the first contact sensing part, and the lens is abutted against the second contact sensing part of the second sensing module on the other side for detecting surface B; according to the steps S1 to S3, continue to complete the detection of surface B and calculate the curvature of surface B of the lens.

9. The lens curvature detection method according to claim 8, characterized in that: During the positioning process of the lens A surface, when the lens surface contacts the first contact sensing part, the lens continues to be controlled to move toward the first contact sensing part for a distance d and then stops, and the preferred range of distance d is 0.2-0.5mm; the controller reads the current displacement (deformation) of the first contact sensing part through the first sensor module, that is, records the distance d value and the left and right position value x of the lens clamping drive mechanism.

10. The lens curvature detection method according to claim 8, characterized in that: During the measurement of the curvature of the lens surface A, the controller controls the lens clamping drive mechanism to keep the displacement of the first contact sensing part unchanged, and the optimal value range is preferably 0.2-0.5mm. At each rotation angle, the controller records the angle value θ corresponding to the lens, the left and right position values ​​x and the height position y corresponding to the lens clamping drive mechanism, and the displacement d corresponding to the contact sensor; when the lens rotates one circle, the controller calculates and obtains the curvature of the A surface of the measured lens based on the recorded data set (θ-xyd).

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