Lens detection device

Abstract

The utility model provides a lens detection device, and relates to the technical field of optical detection. The lens detection device comprises a mounting seat, and a bracket, a first detection mechanism and a second detection mechanism which are arranged on the mounting seat, the bracket is used for placing a lens, and the bracket is rotatably arranged on the mounting seat so that the lens has a first detection position and a second detection position; when the lens is located at the first detection position, the first detection mechanism detects the focal length of the lens; and when the lens is located at the second detection position, the second detection mechanism carries out reflection power detection on the lens. According to the lens detection device provided by the embodiment of the invention, the first detection mechanism and the second detection mechanism are arranged to detect the focal length and the reflection power of the lens respectively, the purpose of completing multiple detections at one time can be achieved, the lens is driven to move through rotation of the support, detection can be completed without taking and placing the lens for many times, and operation is simple and convenient.

Description

Technical Field

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

[0002] Currently, most equipment can only perform one type of test during lens testing. For example, equipment that tests the focal length of a lens cannot simultaneously test the lens's transmission power or reflection power. The compatibility between different models is poor, and completing all tests requires changing equipment and disassembling and reassembling the lens multiple times, making the testing process complicated. Utility Model Content

[0003] This application provides a lens inspection device to solve the problem of complex lens inspection processes.

[0004] In some embodiments, a lens detection device is provided, including a mounting base and a bracket disposed on the mounting base, a first detection mechanism and a second detection mechanism, the bracket being used to place a lens, the bracket being rotatably disposed on the mounting base so that the lens has a first detection position and a second detection position; when the lens is located in the first detection position, the first detection mechanism performs focal length detection on the lens; when the lens is located in the second detection position, the second detection mechanism performs reflection power detection on the lens.

[0005] In some embodiments, a light source and a first guide rail are fixedly provided on the mounting base. The light source, the bracket, and the first guide rail are arranged sequentially along a first direction. The first detection mechanism is connected to the first guide rail and moves relative to the first guide rail along the first direction.

[0006] In some embodiments, the mounting base is further provided with a second guide rail, the second guide rail extending along a second direction perpendicular to the first direction, and the second detection mechanism being connected to the second guide rail and moving relative to the second guide rail along the second direction.

[0007] In some embodiments, the second detection mechanism includes a first installation position and a second installation position.

[0008] When the second detection mechanism is located at the first installation position and the lens is located at the first detection position, the light source, the bracket and the second detection mechanism are arranged sequentially along the first direction, and the second detection mechanism performs transmission power detection on the lens.

[0009] When the second detection mechanism is located in the second installation position and the lens is located in the first detection position, the light source, the bracket and the first detection mechanism are arranged sequentially along the first direction, and the first detection mechanism performs focal length detection on the lens.

[0010] When the second detection mechanism is located in the second installation position and the lens is located in the second detection position, the second detection mechanism performs reflection power detection on the lens.

[0011] In some embodiments, a limiting structure is provided between the bracket and the mounting base, the limiting structure being used to limit the rotation range of the bracket.

[0012] In some embodiments, the limiting structure includes a track groove and a limiting rod. The limiting rod is fixed to one of the mounting base and the bracket, the track groove is formed in the other of the mounting base and the bracket, and the limiting rod is inserted into the track groove and moves along the track groove.

[0013] In some embodiments, the trajectory groove is arc-shaped, and the central angle corresponding to the arc-shaped trajectory groove is 45°.

[0014] In some embodiments, the bracket is provided with a clamping assembly capable of clamping lenses of different sizes.

[0015] In some embodiments, a mounting plate is fixedly mounted on the bracket for mounting lenses. The clamping assembly includes a turntable and a plurality of clamping rods arranged in a circumferential array along the mounting plate. The turntable is rotatably connected to the bracket so that the turntable has a first mating position and a second mating position corresponding to each of the clamping rods.

[0016] When the clamping rod corresponds to the first mating position of the turntable, the two ends of each clamping rod abut against the turntable and the lens respectively;

[0017] When the clamping rod corresponds to the second mating position of the turntable, each clamping rod disengages from the lens.

[0018] In some embodiments, the turntable includes a limiting surface facing each of the clamping rods, and a first mating position and a second mating position are respectively formed at both ends of the limiting surface. The distance from the first mating position to the center of the mounting plate is less than the distance from the second mating position to the center of the mounting plate. Each clamping rod is connected to the mounting plate by an elastic element. When the clamping rod corresponds to the second mating position of the turntable, the elastic element drives each clamping rod to move away from the lens.

[0019] The lens testing device provided in this application embodiment can perform multiple tests on the lens at one time by setting a first testing mechanism and a second testing mechanism to measure the focal length and reflection power of the lens. The lens is then rotated on the mounting base by a bracket, and the rotation of the bracket moves the lens. The testing can be completed without having to pick up and put down the lens multiple times, thus optimizing the lens testing process and simplifying the operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the lens detection device in some embodiments of this application;

[0022] Figure 2 yes Figure 1 A top view of the lens detection device when the lens is in the first detection position in the embodiment;

[0023] Figure 3 yes Figure 1 A top view of the lens detection device when the lens is in the second detection position, as shown in the embodiment;

[0024] Figure 4 yes Figure 1 A schematic diagram of the support structure in the embodiment;

[0025] Figure 5 yes Figure 4 A cross-sectional view of the bracket in the embodiment;

[0026] Figure 6 yes Figure 4 Schematic diagram of the internal structure of the support frame in the embodiment;

[0027] Figure 7 This is a schematic diagram of the internal structure of the bracket in another embodiment. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0029] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of the lens detection device in some embodiments of this application. Figure 2 yes Figure 1 A top view of the lens detection device when the lens is in the first detection position, as shown in the embodiment. Figure 3 yes Figure 1 A top view of the lens detection device when the lens is in the second detection position in the embodiment.

[0032] This application provides a lens testing device, including a mounting base 10 and a bracket 20, a first testing mechanism 30, and a second testing mechanism 40 disposed on the mounting base 10. The bracket 20 is used to place the lens and is rotatably disposed on the mounting base 10 so that the lens has a first testing position and a second testing position. When the lens is in the first testing position, the first testing mechanism 30 performs focal length testing on the lens. When the lens is in the second testing position, the second testing mechanism 40 performs reflection power testing on the lens.

[0033] It should be noted that the lens inspection device is not limited to any type of equipment; it can be used for ordinary photographic lenses or lenses used for inspecting VR devices, etc. The aforementioned lens inspection device, by setting up a first inspection mechanism 30 and a second inspection mechanism 40 to measure the focal length and reflective power of the lens respectively, can achieve multiple inspection purposes in one go. Furthermore, the support 20 is rotated and mounted on the mounting base 10, and the rotation of the support 20 moves the lens, eliminating the need for multiple lens removals and placements to complete the inspection, thus optimizing the lens inspection process and simplifying operation.

[0034] Please see Figure 2 Specifically, a light source 50 and a first guide rail 11 are fixedly mounted on the mounting base 10. The light source 50, the bracket 20, and the first guide rail 11 are aligned along a first direction (i.e., Figure 1 The X-direction of the first detection mechanism 30 is sequentially arranged, and the first detection mechanism 30 is connected to the first guide rail 11 and moves relative to the first guide rail 11 along the first direction.

[0035] The first detection mechanism 30 includes a screen 31. When the lens is in the first detection position, the emitting end of the light source 50 is positioned opposite to the incident light side of the lens, and the propagation path of its light passes through the central axis of the lens. The position of the screen 31 is adjusted until a brightest and smallest spot appears on the screen 31. The distance from the lens to the spot on the screen 31 is measured, which is the focal length.

[0036] It should be noted that the centers of the light source 50, the lens, and the screen 31 are at the same height to ensure that the light source 50 can be projected onto the screen 31 after passing through the lens. The distance between the light source 50 and the lens is fixed, so the focal length of the lens can be measured simply by moving the screen 31 and recording the distance from the screen 31 to the bracket 20.

[0037] Optionally, the first guide rail 11 is provided with a scale, the scale value of which represents the distance from the bracket 20 to the light screen 31.

[0038] Optionally, the first detection mechanism 30 further includes a first driver (not shown in the figure), which is connected to the light screen 31 to drive the light screen 31 to move along the first guide rail 11 in a first direction. The first driver can be a linear drive mechanism familiar to those skilled in the art, such as a cylinder or a lead screw.

[0039] Please see Figure 2 Furthermore, the mounting base 10 is also provided with a second guide rail 12, which runs along a second direction (i.e., Figure 1 The second direction extends in the Y direction, and the second direction is perpendicular to the first direction. The second detection mechanism 40 is connected to the second guide rail 12 and moves relative to the second guide rail 12 along the second direction.

[0040] The second testing mechanism 40 includes an optical power meter 41. The optical power meter 41, the center of the light source 50, and the lens are at the same height. When the lens rotates to the second testing position, an incident angle is formed between the light emitting end (the light source 50) and the lens; an exit angle is formed between the light receiving end (the optical power meter 41) and the lens. The incident angle and the exit angle are the same, so the optical power meter 41 can receive the light reflected by the lens and calculate the reflected power of the lens. The optical power meter 41 is movable in a second direction to facilitate calibration of the optical power meter 41, making the test results more accurate. By detecting the reflected power of the lens and comparing it with the power emitted by the light source 50, the reflectivity of the lens can be calculated. This effectively identifies and intercepts defective products caused by a series of factors such as coating defects, film material defects, film angle defects, and poor lens material, improving the pass rate of lenses, reducing the rework rate at subsequent stations, and improving the quality of product shipments.

[0041] Optionally, the second detection mechanism 40 includes a second driver (not shown in the figure), which is connected to the optical power meter 41 to drive the optical power meter 41 to move on the second guide rail 12. The second driver can be a linear drive mechanism familiar to those skilled in the art, such as a cylinder or a lead screw.

[0042] The first and second drivers can be connected to a PLC control system to precisely control the movement distance of the light screen 31 and the optical power meter 41, and automatically read the distance from the light screen 31 to the bracket 20, thereby improving the automation level of the lens detection device.

[0043] This application does not limit the specific form of the light source 50. The light source 50 can be a laser emitter or a laser pointer. Specifically, in some embodiments, the light source 50 is set as a laser emitter. Since the laser emitted by the laser emitter has the advantages of monochromaticity, good directionality, and higher brightness, the problem of light divergence can be solved, while reducing the size of the light receiving end of the optical power meter 41 and improving the accuracy of the detection results.

[0044] Please continue reading. Figure 2 as well as Figure 3 In some embodiments, the second detection mechanism 40 includes a first mounting position and a second mounting position. When the second detection mechanism 40 is located in the first mounting position and the lens is located in the first detection position, the light source 50, the bracket 20, and the second detection mechanism 40 are arranged sequentially along the first direction, and the second detection mechanism 40 performs transmission power detection on the lens. When the second detection mechanism 40 is located in the second mounting position and the lens is located in the first detection position, the light source 50, the bracket 20, and the first detection mechanism 30 are arranged sequentially along the first direction, and the first detection mechanism 30 performs focal length detection on the lens. When the second detection mechanism 40 is located in the second mounting position and the lens is located in the second detection position, the second detection mechanism 40 performs reflection power detection on the lens.

[0045] In this embodiment, the mounting base 10 is also fixedly provided with a light source 50, a first guide rail 11, and a second guide rail 12. The first guide rail 11 extends along a first direction, and the second guide rail 12 extends along a second direction. The first detection mechanism 30 includes a light screen 31, which is movably connected to the first guide rail 11 along the first direction. The second detection mechanism 40 includes an optical power meter 41, which is detachably connected to the first guide rail 11 and the second guide rail 12 so that the optical power meter 41 has a first mounting position connected to the first guide rail 11 and a second mounting position connected to the second guide rail 12.

[0046] In the initial state, the optical power meter 41 is located on the second guide rail 12, and the optical screen 31 is located on the first guide rail 11. By rotating the bracket 20, the lens is positioned at the first detection position and the second detection position respectively, thus completing the focal length detection and reflection power detection of the lens.

[0047] When it is necessary to test the transmission power of the lens, the optical power meter 41 is installed on the first guide rail 11, so that the light source 50, the bracket 20, and the optical power meter 41 are arranged sequentially along the first direction. The lens is then rotated to the first testing position, so that the emitting end of the light source 50 is opposite to the light incident side of the lens, and the propagation path of its light passes through the lens and is received by the optical power meter 41, measuring the transmission power of the lens. By measuring the transmission power of the lens and comparing it with the light power emitted by the light source 50, the transmittance of the lens can be calculated. The calculation is simple and the result is accurate. By testing the transmission power of the lens, quality defects of the lens can be further identified, ensuring the quality of the lens.

[0048] It is understandable that when the optical power meter 41 is installed on the first guide rail 11, the optical screen 31 can remain connected to the first guide rail 11. The optical power meter 41 can be installed on the bracket 20 and the bracket 20 by moving the optical screen 31 away from the support 20. In some scenarios, the optical screen 31 and the first guide rail 11 are also detachably connected. When the optical power meter 41 is installed on the first guide rail 11, the optical screen 31 is first removed from the first guide rail 11. The first guide rail 11 has sufficient installation space to install the optical power meter 41, and this avoids the optical screen 31 affecting the optical power meter 41 during transmission power detection of the lens.

[0049] Optionally, both the first guide rail 11 and the second guide rail 12 are provided with limiting protrusions of the same shape, and both the optical screen 31 and the optical power meter 41 are provided with limiting grooves of the same shape that cooperate with the outer contour of the limiting protrusions. When the optical screen 31 is installed on the first guide rail 11, the limiting protrusion of the first guide rail 11 is accommodated in the limiting groove of the optical screen 31 to facilitate the installation and positioning of the optical screen 31; similarly, when the optical power meter 41 is installed on the second guide rail 12, the limiting protrusion of the second guide rail 12 is accommodated in the limiting groove of the optical power meter 41 to facilitate the installation and positioning of the optical power meter 41. The limiting protrusions have a stepped structure to ensure the stability of the installation structure of the optical power meter 41 and / or the optical screen 31 and the accuracy of its positioning. It is understood that the positions of the optical power meter 41 and the optical screen 31 can be interchanged, that is, the optical power meter 41 is installed on the first guide rail 11 and the optical screen 31 is installed on the second guide rail 12, so as to switch between the first and second installation positions of the optical power meter 41. Of course, the positions of the limiting protrusion and the limiting groove can also be interchanged. For example, the first guide rail 11 and the second guide rail 12 are both provided with limiting grooves of the same shape, and the light screen 31 and the light power meter 41 are both provided with limiting protrusions of the same shape.

[0050] Please continue reading. Figures 1 to 3 In some embodiments, a limiting structure 60 is provided between the bracket 20 and the mounting base 10, the limiting structure 60 being used to limit the rotation range of the bracket 20.

[0051] Specifically, the limiting structure 60 includes a track groove 61 and a limiting rod 62. The limiting rod 62 is fixed to one of the mounting base 10 and the bracket 20, and the track groove 61 is formed in the other of the mounting base 10 and the bracket 20. The limiting rod 62 is inserted into the track groove 61 and moves along the track groove 61. This application only describes the example where the track groove 61 is formed on the bracket 20 and the limiting rod 62 is fixed to the mounting base 10.

[0052] Please see Figure 2 The track groove 61 and the limiting rod 62 are provided in two sets, and the two sets of track grooves 61 and limiting rods 62 are centrally symmetrically arranged to ensure the stability of the bracket 20 during rotation. The track groove 61 includes a first end 611 and a second end 612. When the bracket 20 drives the lens to rotate forward (i.e., ... Figure 2 When the bracket 20 rotates to the first detection position (in the R direction shown), the limiting rod 62 abuts against the first end 611 of the track groove 61; when the bracket 20 drives the lens to rotate in the opposite direction to the second detection position, the limiting rod 62 abuts against the second end 612 of the track groove 61. Thus, by simply rotating the bracket 20 forward or in the opposite direction to its full stroke, the lens can switch between the first and second detection positions without needing to observe whether the bracket 20 has rotated to the correct position.

[0053] Furthermore, to prevent the bracket 20 from accidentally rotating in the reverse direction after reaching its full stroke, causing the lens to deviate from the first detection position, or from accidentally rotating in the forward direction after reaching its full stroke, causing the lens to deviate from the second detection position, a locking structure (not shown in the figure) can be provided between the bracket 20 and the mounting base 10 to lock the position of the bracket 20. For example, a plug is elastically connected to the limiting rod 62, and the first end 611 and the second end 612 of the trajectory groove 61 are respectively provided with slots that cooperate with the plug. The plug can extend out of the limiting rod 62 under elastic force and engage with the slot, or the plug can retract into the limiting rod 62 under external force to overcome the elastic force and disengage from the slot. When the bracket 20 rotates the lens forward to the first detection position, the insert on the limiting rod 62 engages with the slot at the first end 611 of the track groove 61 to ensure the lens is fixed in the first detection position; when the bracket 20 rotates in the reverse direction to the second detection position, the insert on the limiting rod 62 engages with the slot at the second end 612 of the track groove 61 to ensure the lens is fixed in the second detection position. Other locking structures familiar to those skilled in the art can also be used, such as screw locking or snap-locking, which will not be described in detail here.

[0054] Please continue reading. Figure 2 as well as Figure 3 In some embodiments, the track groove 61 is arc-shaped, and the central angle corresponding to the arc-shaped track groove 61 is 45°. As mentioned above, the first track extends along the first direction, and the second track extends along the second direction. The first direction and the second direction are perpendicular to each other, and the central angle corresponding to the track groove 61 is set to 45°. In the initial state, the limiting rod 62 is located at the first end 611 of the track groove 61, and the bracket 20 is positioned opposite to the light screen 31 and the light source 50. By rotating the bracket 20 by 45°, the limiting rod 62 is located at the second end 612 of the track groove 61. At this time, the angle between the light emitting end, i.e., the light source 50, and the lens is 45°, and the angle between the light receiving end, i.e., the optical power meter 41, and the lens is 45°, ensuring that the incident angle and the exit angle of the light are the same, and ensuring that the optical power meter 41 can receive the light reflected by the lens.

[0055] Please see Figures 4 to 6 , Figure 4 yes Figure 1 A schematic diagram of the support structure in the embodiment. Figure 5 yes Figure 4 A cross-sectional view of the bracket in the embodiment. Figure 6 yes Figure 4 A schematic diagram of the internal structure of the bracket in an embodiment. In some embodiments, the bracket 20 is provided with a clamping component 24, which is capable of clamping lenses of different sizes or shapes.

[0056] For example, a mounting plate 21 is fixedly mounted on the bracket 20. The mounting plate 21 has a through hole for mounting lenses. The clamping assembly 24 includes a turntable 22 and a plurality of clamping rods 241 arranged in a circumferential array along the mounting plate 21. The mounting plate 21 is located in the middle of the turntable 22. The mounting plate 21 has a guide hole 25 that extends radially along the mounting plate 21. The clamping rods 241 pass through the guide hole 25 and move along the guide hole 25. The turntable 22 can be a disc or other shapes, which are not specifically limited here. The turntable 22 is rotatably connected to the bracket 20 so that the turntable 22 has a first mating position 222 and a second mating position 223 corresponding to each clamping rod 241. When the turntable 22 rotates to the position where the clamping rod 241 corresponds to the first mating position 222 of the turntable 22, the two ends of each clamping rod 241 abut against the turntable 22 and the lens respectively; when the turntable 22 rotates to the position where the clamping rod 241 corresponds to the second mating position 223 of the turntable 22, each clamping rod 241 disengages from the lens.

[0057] Specifically, the turntable 22 includes a limiting surface 221 facing each clamping rod 241. A first mating position 222 and a second mating position 223 are respectively formed at both ends of the limiting surface 221. The distance from the first mating position 222 to the center of the mounting plate 21 is less than the distance from the second mating position 223 to the center of the mounting plate 21. The turntable 22 can rotate in either the forward or reverse direction. Figure 6 The R direction shown is the forward rotation direction. The first mating position 222 and the second mating position 223 have an arc transition to avoid jamming during the rotation of the turntable 22. In this embodiment, when it is necessary to clamp the lens, the turntable 22 can be rotated forward so that the first mating position 222 of the turntable 22 corresponds to the clamping rod 241. During this process, the clamping rod 241 moves radially towards the lens along the mounting plate 21 until it abuts against the edge of the lens. When it is necessary to remove the lens, the turntable 22 can be rotated in the reverse direction so that the second mating position 223 of the turntable 22 corresponds to the clamping rod 241. This allows the clamping rod 241 to have space to move radially away from the lens along the mounting plate 21, so that the clamping rod 241 can disengage from the lens and the lens can be removed.

[0058] Please see Figure 7 , Figure 7This is a schematic diagram of the internal structure of the bracket in another embodiment. Further, each clamping rod 241 is connected to the mounting plate 21 by an elastic element 242. When the clamping rod 241 corresponds to the second mating position 223 of the turntable 22, the elastic element 242 drives each clamping rod 241 to move away from the lens. In this embodiment, there are four clamping rods 241, and the elastic element 242 is a spring. In some scenarios, the elastic element 242 can also be a spring sheet or other structures. Optionally, the spring is sleeved on the outside of the clamping rod 241, with both ends of the spring abutting against the clamping rod 241 and the mounting plate 21 respectively, or the two ends of the spring are fixedly connected to the clamping rod 241 and the mounting plate 21 respectively. The spring can be located inside the guide hole 25 or at other positions on the mounting plate 21; no specific limitation is made here. When the turntable 22 rotates in the forward direction, the clamping rod 241 can overcome the spring force and move closer to the lens until it comes into contact with the lens; when the turntable 22 rotates in the reverse direction, the clamping rod 241 can automatically move away from the lens under the spring force until it disengages from the lens. Optionally, a stop plate 2411 is fixedly provided on the clamping rod 241. The stop plate 2411 is located at the end of the guide hole 25 opposite to the mounting plate 21 to limit the range of movement of the clamping rod 241 along the guide hole 25 and prevent the clamping rod 241 from disengaging from the guide hole 25.

[0059] Please refer to the previous document. Figure 5 In some embodiments, a locking structure is provided between the turntable 22 and the bracket 20. The locking structure is used to restrict the rotation of the turntable 22 relative to the bracket 20, so that the first mating position 222 of the turntable 22 can be maintained in a state corresponding to the clamping rod 241. Specifically, the locking structure includes a top holding member 26, which is threadedly connected to the bracket 20. One end of the top holding member 26 abuts against one side of the turntable 22, and the other side of the turntable 22 directly or indirectly abuts against the bracket 20. Optionally, the top support 26 is located on the side of the turntable 22 away from the mounting plate 21. The turntable 22 has a movable space to move closer to or away from the mounting plate 21 along the axial direction of the mounting plate 21. By rotating the top support 26, the turntable 22 is driven to move closer to the mounting plate 21 until its opposite sides are tightly against the top support 26 and the mounting plate 21, thereby generating friction on the opposite sides of the turntable 22 and restricting the rotation of the turntable 22 relative to the bracket 20. Alternatively, the top support 26 is located on the side of the turntable 22 away from the bracket 20. By rotating the top support 26, the turntable 22 is driven to move closer to the bracket 20 until its opposite sides are tightly against the top support 26 and the bracket 20, thereby generating friction on the opposite sides of the turntable 22 and restricting the rotation of the turntable 22 relative to the bracket 20.

[0060] In some embodiments, the turntable 22 can rotate relative to the bracket 20 in an automated manner. For example, a rotary motor is fixedly mounted on the bracket 20, and the output shaft of the rotary motor is keyed to the turntable 22. The rotary motor controls the rotation or stopping of the turntable 22, eliminating the need for a locking structure.

[0061] Please continue reading. Figure 5 In some embodiments, the bracket 20 is also provided with a cover plate 23, and the clamping rod 241 is installed between the cover plate 23 and the turntable 22 to ensure the overall aesthetics of the device. Optionally, the cover plate 23 and the turntable 22 are detachably and fixedly connected, specifically by snap-fit ​​connection, bolt connection, etc., so as to facilitate opening the cover plate 23 to inspect the clamping assembly 24. The cover plate 23 can rotate synchronously with the turntable 22. Optionally, the cover plate 23 is detachably and fixedly connected to the mounting plate 21, and the turntable 22 can rotate relative to the cover plate 23. Combined with the embodiment where the top support 26 is located on the side of the turntable 22 away from the mounting plate 21, the cover plate 23 can also be tightly attached to the turntable 22 and generate friction on the turntable 22 under the action of the top support 26.

[0062] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. A lens testing device, characterized in that, The device includes a mounting base and a bracket disposed on the mounting base, a first detection mechanism and a second detection mechanism, wherein the bracket is used to place a lens, and the bracket is rotatably disposed on the mounting base so that the lens has a first detection position and a second detection position; When the lens is located at the first detection position, the first detection mechanism performs focal length detection on the lens; When the lens is located at the second detection position, the second detection mechanism performs reflection power detection on the lens.

2. The lens testing device according to claim 1, characterized in that, The mounting base is fixedly provided with a light source and a first guide rail. The light source, the bracket, and the first guide rail are arranged sequentially along a first direction. The first detection mechanism is connected to the first guide rail and moves relative to the first guide rail along the first direction.

3. The lens testing device according to claim 2, characterized in that, The mounting base is also provided with a second guide rail, which extends along a second direction perpendicular to the first direction. The second detection mechanism is connected to the second guide rail and moves relative to the second guide rail along the second direction.

4. The lens testing device according to claim 2 or 3, characterized in that, The second testing mechanism includes a first installation position and a second installation position. When the second detection mechanism is located at the first installation position and the lens is located at the first detection position, the light source, the bracket and the second detection mechanism are arranged sequentially along the first direction, and the second detection mechanism performs transmission power detection on the lens. When the second detection mechanism is located in the second installation position and the lens is located in the first detection position, the light source, the bracket and the first detection mechanism are arranged sequentially along the first direction, and the first detection mechanism performs focal length detection on the lens. When the second detection mechanism is located in the second installation position and the lens is located in the second detection position, the second detection mechanism performs reflection power detection on the lens.

5. The lens testing device according to any one of claims 1-3, characterized in that, A limiting structure is provided between the bracket and the mounting base, and the limiting structure is used to limit the rotation range of the bracket.

6. The lens testing device according to claim 5, characterized in that, The limiting structure includes a track groove and a limiting rod. The limiting rod is fixed to one of the mounting base and the bracket. The track groove is formed in the other of the mounting base and the bracket. The limiting rod is inserted into the track groove and moves along the track groove.

7. The lens testing device according to claim 6, characterized in that, The track groove is arc-shaped, and the central angle corresponding to the track groove is 45°.

8. The lens testing device according to any one of claims 1-3, characterized in that, The bracket is equipped with a clamping assembly that can clamp lenses of different sizes.

9. The lens testing device according to claim 8, characterized in that, A mounting plate is fixedly mounted on the bracket for mounting lenses. The clamping assembly includes a turntable and a plurality of clamping rods arranged in a circumferential array along the mounting plate. The turntable is rotatably connected to the bracket so that the turntable has a first mating position and a second mating position corresponding to each of the clamping rods. When the clamping rod corresponds to the first mating position of the turntable, the two ends of each clamping rod abut against the turntable and the lens respectively; When the clamping rod corresponds to the second mating position of the turntable, each clamping rod disengages from the lens.

10. The lens testing device according to claim 9, characterized in that, The turntable includes a limiting surface facing each of the clamping rods. The first mating position and the second mating position are respectively formed at both ends of the limiting surface. The distance from the first mating position to the center of the mounting plate is less than the distance from the second mating position to the center of the mounting plate. Each clamping rod is connected to the mounting plate by an elastic element. When the clamping rod corresponds to the second mating position of the turntable, the elastic element drives each clamping rod to move away from the lens.

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