A lens module testing structure, method and device

Abstract

The present invention discloses a test structure, method and device for a lens module, wherein the test structure of the lens module comprises: a transmitting end module, a receiving end module, a mounting platform and a test board, wherein the mounting platform is used to mount the transmitting end module and the receiving end module, and the test board is used to reflect the light signal emitted by the transmitting end module so that the receiving end module obtains the light spot area on the test board. The test structure of the present invention can improve the accuracy of indicators such as window efficiency and energy distribution in lens module performance testing.

Description

Technical Field

[0001] The present invention relates to the field of camera technology, and in particular to a testing structure, method and device for a lens module. Background Art

[0002] Time-of-Flight (ToF) is a technology that uses the time of flight of light. ToF, structured light and binocular stereo vision are the three mainstream 3D imaging methods in recent years. The principle of ToF imaging is to emit near-infrared light into the scene and use the flight time information of light to measure the distance of objects in the scene. Compared with the other two 3D imaging methods, ToF has a small amount of depth information calculation, strong anti-interference ability and a long measurement range. These advantages have promoted the widespread application of ToF technology in industrial fields such as robots, especially on the mobile side. Many brands have applied TOF technology to the rear camera of mobile phones.

[0003] At present, the method of testing the iToF (indirect Time-of-Flight) module is as follows: in the iToF module, first, the TX (Transmit X) in the iToF module transmits a modulated infrared light signal into the scene; then, the light signal reflected by the object to be tested in the scene is received through the RX (Receive X); then, the phase difference between the transmitted signal and the received signal is calculated based on the accumulated charge during the exposure time to obtain the depth of the target object.

[0004] When using existing technology to test the performance of the iToF module, only the TX emits modulated light to the diffusion film, and then a CCD (charge coupled device) camera is used to capture the image on the diffusion film to perform performance analysis of the iToF module. The structural principle is as follows: Figure 1 As shown, the imaging effect after the CCD camera is taken is as follows Figure 2 The window efficiency test results obtained by using the existing test method are shown in Figure 3 As shown, HFOI, VFOI, WindowEfficency are respectively the effective field of view angle in the length direction, the effective field of view angle in the width direction and the window efficiency obtained by the existing method; FOV_X and FOV_Y are respectively the effective field of view angle in the length direction and the effective field of view angle in the width direction obtained by the test method of this embodiment. Figure 3 It can be seen that the window effect is around 80%, which is relatively low. The energy distribution test results obtained by using the existing test method are as follows Figure 4 As shown, Figure 4 The energy distribution values ​​of 9 positions are shown in FIG. Figure 4 It can be seen that the energy distribution uniformity is low.

[0005] It can be seen that due to the imaging on the diffusion film, it is difficult for the image spot to cover the entire field of view, resulting in greater randomness and errors in the process of selecting the spot area, resulting in low accuracy of indicators such as test window efficiency and energy distribution. Summary of the invention

[0006] In view of the above problems, the present invention proposes a test structure, method and device for a lens module, which can improve the accuracy of indicators such as window efficiency and energy distribution in lens module performance testing.

[0007] In the first aspect, the present application provides the following technical solution through an embodiment:

[0008] A test structure of a lens module, the test structure of the lens module comprising a transmitting end module, a receiving end module, a mounting platform and a test board, wherein the mounting platform is used to install the transmitting end module and the receiving end module, and the test board is used to reflect the light signal emitted by the transmitting end module so that the receiving end module obtains the light spot area on the test board.

[0009] Optionally, the installation platform is provided with a first installation position and a second installation position, the first installation position is used to install the transmitting end module, the second installation position is used to install the receiving end module, and the installation platform is used to adjust the relative position between the second installation position and the test board; the test board is arranged in the relative direction of the first installation position.

[0010] Optionally, the distance between the second mounting position and the test board is less than or equal to 1 m.

[0011] Optionally, the test plate is a diffuser plate.

[0012] Optionally, a six-axis platform is provided on the mounting platform, and the second mounting position is provided on the six-axis platform; the six-axis platform is used to adjust the relative distance and relative angle between the second mounting position and the test board so that the light spot area fills the field of view of the receiving end module.

[0013] Optionally, the six-axis platform is also used to adjust the distance between the second installation position and the first installation position so that the receiving end module can achieve clear imaging.

[0014] In the second aspect, based on the same inventive concept, the present application provides the following technical solution through an embodiment:

[0015] A lens module testing method is applied to the test structure described in any one of the first aspects above, the test structure comprising a transmitter module, a receiver module, a mounting platform and a test board, and the lens module testing method comprises:

[0016] The transmitting end module and the receiving end module are installed on the installation platform; the relative position between the receiving end module and the test board is adjusted so that the receiving end module can shoot the light spot area on the test board to obtain a test photo; wherein the light spot area is the area formed on the test board by the light signal emitted by the transmitting end module; and the performance parameters of the lens module are obtained according to the test photo.

[0017] Optionally, adjusting the relative position between the receiving end module and the test board includes:

[0018] The relative distance between the receiving end module and the test board is adjusted so that the distance between the receiving end module and the test board is less than 1 m.

[0019] Optionally, the adjusting the relative position between the receiving end module and the test board further includes:

[0020] The relative distance and relative angle between the receiving end module and the test board are adjusted so that the light spot area fills the field of view of the receiving end module.

[0021] In the third aspect, based on the same inventive concept, the present application provides the following technical solution through an embodiment:

[0022] A lens module testing device is applied to the test structure described in any one of the first aspects above, the test structure comprising a transmitting end module, a receiving end module, a mounting platform and a test board, and the lens module testing device comprises:

[0023] The installation module is used to install the transmitting end module and the receiving end module on the installation platform; the adjustment module is used to adjust the relative position between the receiving end module and the test board so that the receiving end module can shoot the light spot area on the test board to obtain a test photo; wherein the light spot area is the area formed on the test board by the light signal emitted by the transmitting end module; the testing module is used to obtain the performance parameters of the lens module according to the test photo.

[0024] A test structure of a lens module provided by an embodiment of the present invention comprises a transmitting end module, a receiving end module, a mounting platform and a test board, wherein the mounting platform is used to install the transmitting end module and the receiving end module, and the test board is used to reflect the light signal emitted by the transmitting end module so that the receiving end module obtains the light spot area on the test board. Thus, the test structure of the present invention can use the transmitting end module and the receiving end module for testing at the same time, and the test board is used in the test structure to reflect the light to form a light spot for the receiving end module to receive the imaging, avoiding the use of the diffusion film imaging method, improving the imaging quality, and ensuring the accuracy of indicators such as window efficiency and energy distribution. At the same time, the test structure uses the transmitting end module and the receiving end module at the same time during the test, which can test the performance of the receiving end module, as well as the comprehensive performance of the transmitting end module and the receiving end module, thereby improving the reliability of the test. And when the test structure is used for testing, it is no longer necessary to use a CCD camera to take pictures separately, thereby improving the convenience of the test.

[0025] A lens module testing method and device provided in an embodiment of the present invention can test the comprehensive performance of the lens module by using a transmitting end module and a receiving end module to perform performance testing at the same time; and during the test, the receiving end module is used to shoot the light spot area formed by reflection on the test board, and there is no need to use a CCD camera to shoot the light spot on the diffusion film. This improves the accuracy of indicators such as window efficiency and energy distribution during lens module testing, and can verify the comprehensive performance of the transmitting end module and the receiving end module.

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0028] Figure 1 The schematic diagram of the principle of the prior art test lens module is shown;

[0029] Figure 2 A schematic diagram showing the imaging effect when the existing solution in the embodiment of the present invention is tested for performance;

[0030] Figure 3A schematic diagram of window efficiency test results obtained by using an existing solution is shown;

[0031] Figure 4 A schematic diagram showing the regional energy distribution test results obtained by using the existing solution

[0032] Figure 5 A schematic structural diagram of a lens module test structure provided by an embodiment of the present invention is shown;

[0033] Figure 5A A structural schematic diagram showing another test structure of a lens module provided by an embodiment of the present invention;

[0034] Figure 6 A schematic diagram showing the imaging effect of a test structure of a lens module in an embodiment of the present invention when a performance test is performed;

[0035] Figure 7 A flowchart of a lens module testing method provided by an embodiment of the present invention is shown;

[0036] Figure 8 A schematic diagram showing a test photo obtained by testing the test structure of the lens module provided by an embodiment of the present invention;

[0037] Fig. 9 A schematic diagram showing the calculation principle of window efficiency when testing the test structure of the lens module provided by an embodiment of the present invention is used;

[0038] Fig.10 A schematic diagram of window efficiency test results obtained by testing the lens module provided by an embodiment of the present invention is shown;

[0039] Fig.11 A schematic diagram showing regional energy distribution test results obtained by using the lens module test method provided by an embodiment of the present invention;

[0040] Fig.12 A schematic structural diagram of a lens module testing device provided in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0041] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0042] See also Figure 5, shows a schematic structural diagram of a lens module test structure 100 provided in an embodiment of the present invention. The lens module test structure 100 comprises a transmitter module 41 and a receiver module 42, a mounting platform 11 and a test board 31.

[0043] The mounting platform 11 is used to mount the transmitter module 41 and the receiver module 42. Specifically, a first mounting position 21 and a second mounting position 22 may be set on the mounting platform 11. The first mounting position 21 is used to mount the transmitter module 41 in the lens module, and the second mounting position 22 is used to mount the receiver module 42 in the lens module. The mounting platform 11 may also be used to adjust the relative position between the second mounting position 22 and the test board 31 to change the relative distance between the receiver module 42 and the test board 31.

[0044] The first mounting position 21 can be a fixed mounting position or an adjustable movable mounting position. When the first mounting position 21 is a fixed mounting position, the first mounting position 21 can be fixed on the mounting platform 11; when the first mounting position 21 is an adjustable movable mounting position, a first six-axis platform 211 can be set on the mounting platform 11, and the first mounting position 21 can be set on the first six-axis platform 211. Figure 5A As shown. By controlling the first six-axis platform 211, the distance and angle between the transmitting end module 41 and the test board can be changed, and the distance between the transmitting end module 41 and the receiving end module 42 can also be changed, that is, the baseline distance can be changed. The baseline distance between the transmitting end module 41 and the receiving end module 42 can be determined by the type and regulations of the lens module. For example, in this embodiment, when the sensor model of the lens module is a 33D iTOF module, the baseline spacing can be determined to be 9mm, which can ensure that the receiving end module 42 can perform complete and clear imaging.

[0045] The second mounting position 22 may be an adjustable mounting position. Similarly, in order to achieve the controllability of the second mounting position 22, a second six-axis platform may be further provided on the mounting platform 11 in the present embodiment, the second six-axis platform being provided on the mounting platform 11, and the second mounting position 22 being provided on the second six-axis platform. By controlling the second six-axis platform, the relative distance and relative angle between the second mounting position 22 and the test board 31 may be adjusted, and the distance between the transmitting end module 41 and the receiving end module 42 may be adjusted, that is, the baseline distance may be changed. Adjusting the angle and spacing between the second mounting position 22 and the test board 31 can ensure that when the receiving end module 42 is imaged, the light spot generated on the test board 31 can fill the entire field of view of the receiving end module 42 as much as possible.

[0046] The first mounting position 21 and the second mounting position 22 can both be realized by existing fixing fixtures or groove-shaped mounting positions; the mounting platform 11 can be an existing camera module test platform; the first six-axis platform 211 can be fixedly arranged relative to the mounting platform 11, and the first mounting position 21 can be fixed on the platform of the first six-axis platform 211, and the distance between the first mounting position 21 and the second mounting position 22, as well as the distance and angle between the first mounting position 21 and the test board 31 can be adjusted by controlling the first six-axis platform 211. The installation relationship between the second mounting position 22 and the second six-axis platform can refer to the installation relationship between the first mounting position 21 and the first six-axis platform 211, and will not be repeated. The six-axis platform can be connected to the host computer for control, which is a commonly used technical means and will not be repeated in this embodiment.

[0047] It should be noted that the six-axis platform in this embodiment can also be replaced by other devices with adjustment functions without limitation.

[0048] In this embodiment, a structure with a fixing or clamping function can be used to achieve the fixing function of the first installation position 21 and the second installation position 22. The fixing method includes, for example, bolt fixing, buckle fixing, glue bonding fixing, etc. The structure with a fixing or clamping function belongs to the commonly used prior art and will not be described in detail in this embodiment.

[0049] The test board 31, i.e., the chart board, is used to reflect the light signal emitted by the transmitting end module 41 so that the receiving end module 42 can receive the light signal. The test board 31 is arranged in the relative direction of the first mounting position 21, that is, the test board 31 is arranged in the opposite direction of the first mounting position 21. Specifically, the test board 31 is a diffuser, and the distance between the first mounting position 21 and the second mounting position 22 is less than or equal to 1m. The test structure 100 of this embodiment needs to ensure that the distance between the test board 31 and the lens module is within 1m to achieve a better test effect.

[0050] The working principle of the test structure 100 in this embodiment is as follows: when the transmitter module 41 is installed in the first installation position 21 and the receiver module 42 is installed in the second installation position 22, the transmitter module 41 transmits a light signal to form a light spot on the test board 31, and the receiver module 42 receives the light signal reflected by the test board 31 to achieve imaging of the light spot. When the existing test scheme is used to test the lens module, the imaging effect is as follows: Figure 2 When the test structure 100 in this embodiment is used for testing, the imaging effect is as shown in FIG. Figure 6 shown.

[0051] The test structure 100 of this embodiment can use the transmitter module 41 and the receiver module 42 for testing at the same time, and can check the performance of the receiver module 42, as well as the comprehensive performance of the transmitter module 41 and the receiver module 42, thereby improving the reliability of the test; and the test structure 100 no longer requires a CCD camera to take pictures separately, thereby improving the convenience of the test.

[0052] See also Figure 7 Based on the same inventive concept, another embodiment of the present invention further provides a lens module testing method, which can be applied to the testing structure of the above embodiment. The lens module testing method includes:

[0053] Step S10: installing the transmitting end module and the receiving end module on the installation platform.

[0054] In step S10, the transmitter module and the receiver module may be installed after the distance between the second installation position and the first installation position is adjusted according to the baseline distance of the lens module. Alternatively, after the lens module is fixed at the first installation position and the second installation position, the baseline distance between the transmitter module and the receiver module may be adjusted to meet the specification requirements of the lens module.

[0055] Step S20: adjusting the relative position between the receiving end module and the test board so that the receiving end module can photograph the light spot area on the test board to obtain a test photo; wherein the light spot area is the area formed on the test board by the light signal emitted by the transmitting end module.

[0056] In step S20, the receiving end module can be adjusted based on the six-axis platform. The relative position includes the angle of the receiving end module relative to the test board, and the distance of the receiving end module relative to the test board. When adjusting the distance, the distance between the test board and the receiving end module should be within 1m to ensure the imaging effect and quality. The transmitting end module and the receiving end module are controlled to shoot and obtain test photos. Specifically, when starting to shoot the test photo, the transmitting end module emits a light signal to the test board, and then the receiving end module receives the light signal reflected by the test board for imaging, and obtains a test photo of the spot image on the test board. Furthermore, the distance between the test board and the lens module can be changed by adjusting the position of the mounting platform or the position of the test board, and test photos can be obtained by taking photos at multiple positions. The performance parameters of the test photos obtained from different shooting positions are analyzed to ensure the imaging performance of the lens module at different focal lengths and improve the reliability of the test. For example, when testing the 33D iTOF module, the lens module can be imaged at three locations, 400mm, 500mm, and 600mm in front of the test board.

[0057] Step S30: Obtaining performance parameters of the lens module according to the test photos.

[0058] In step S30, the performance parameters of the lens module specifically include window efficiency, effective field angle, uniformity of energy distribution, etc. The following is a comparison of the technical effects of the test method of the present invention and the test method of the prior art using a specific example:

[0059] Taking the iToF module as an example, after the test photo is obtained by imaging using the method of the present invention, the length X, width Y and area S of the spot area of ​​the test photo can be obtained, and the maximum grayscale value GM and the average grayscale value GA of the spot area can be obtained. Then, taking the grayscale value GM / 2 as the threshold, the length X1, width Y1 and area S1 of the effective field of view area are obtained; at the same time, the maximum grayscale value GM1 and the average grayscale value GA1 of the effective field of view area are obtained, as shown in FIG. Figure 8 As shown. Figure 8 In the figure, M represents the boundary of the spot area, and N represents the boundary of the effective field of view area. It should be noted that the spot area in this embodiment can be the area included in the entire test photo, which avoids secondary processing of the photo and avoids test errors.

[0060] Furthermore, the window efficiency test is performed: the sum of the grayscale values ​​of the spot area and the sum of the grayscale values ​​of the effective field of view area are obtained, and the final window efficiency = T2 / T1; wherein T1 is the sum of the grayscale values ​​of the spot area, T1 = GA*S; T2 is the sum of the grayscale values ​​of the effective field of view area, T2 = GA1*S1. Field of view angle test is performed: for the field of view angle during imaging, tan(α / 2) = X1 / 2f; based on this, α = 2atan(X1 / 2f); similarly: β = 2atan(Y1 / 2f), wherein α is the effective field of view angle in the length direction, β is the effective field of view angle in the width direction, and f is the focal length of the lens module, such as Fig. 9 shown.

[0061] The test results obtained by the test method of this embodiment are as follows Fig.10 As shown, the test results obtained by using the existing test method are as follows Figure 3 As shown, HFOI, VFOI, WindowEfficency are respectively the effective field of view angle in the length direction, the effective field of view angle in the width direction and the window efficiency obtained by the existing method; FOV_X and FOV_Y are respectively the effective field of view angle in the length direction and the effective field of view angle in the width direction obtained by the test method of this embodiment. Fig.10 It can be seen that the window efficiency and effective field of view angle are significantly improved compared with the existing technical test scheme, which is closer to the actual situation, effectively improves the test pass rate of the lens module, and the test results are more reliable.

[0062] Furthermore, a regional energy distribution test is performed: regional energy distribution = averG / G; wherein averG is the average grayscale value of the 15*15 pixel area; and G is the grayscale value at the center of the effective area. After the center of the effective area is determined, test points at the boundaries of 0.5 times the spot size and 0.85 times the spot size are selected along the ±X and ±Y directions of the center, for a total of 5*5 points. Then, the average grayscale value of 25 15*15 pixel areas and the grayscale value at the center of the effective area are obtained to obtain the regional energy distribution of each test point. The test results obtained by the test method of this embodiment are as follows: Fig.11 As shown, Fig.11 The energy distribution values ​​at 25 positions are shown, where A represents the center point, P1 represents the boundary of 0.85 times the spot size, P2 represents the boundary of 0.5 times the spot size, and P3 represents a 15*15 pixel area. The test results obtained by using the existing test method are as follows Figure 4 As shown, Figure 4 The energy distribution values ​​of 9 positions are shown in FIG. Fig.11 It can be seen that the energy distribution values ​​among the 25 test points are within 0.03, which has a good effect. Figure 4 It can be seen that the difference in energy distribution values ​​among 9 test points can reach 0.49, and the test effect is poor. Since the existing solution does not use a receiving end module, it cannot reflect the performance of the lens module as a whole; at the same time, the existing solution will perform secondary processing on the pictures taken by the CCD camera during the test to extract the spot image, which will also lead to large errors.

[0063] Therefore, the method in this embodiment can fully reflect the comprehensive performance of the transmitting end module and the receiving end module, and effectively improve the test reliability of the lens module.

[0064] See also Fig.12 In another embodiment of the present invention, a lens module testing device 300 is provided, which is applied to the test structure described in any one of the above embodiments. The lens module includes a transmitting end module and a receiving end module. The lens module testing device 300 includes:

[0065] The installation module 301 is used to install the transmitting end module and the receiving end module on the installation platform; the adjustment module 302 is used to adjust the relative position between the receiving end module and the test board so that the receiving end module can shoot the light spot area on the test board to obtain a test photo; wherein the light spot area is the area formed on the test board by the light signal emitted by the transmitting end module; the test module 303 is used to obtain the performance parameters of the lens module according to the test photo.

[0066] As an optional implementation, the adjustment module 302 is specifically configured to:

[0067] The relative distance between the receiving end module and the test board is adjusted so that the distance between the receiving end module and the test board is less than 1 m.

[0068] As an optional implementation, the adjustment module 302 is specifically configured to:

[0069] The relative distance and relative angle between the receiving end module and the test board are adjusted so that the light spot area fills the field of view of the receiving end module.

[0070] It should be noted that the specific implementation and technical effects of the lens module testing device 300 provided in the embodiment of the present invention are the same as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0071] Based on the same inventive concept, another embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the method described in any one of the above method embodiments are implemented.

[0072] It should be noted that in the computer-readable storage medium provided in the embodiment of the present invention, when the program is executed by the processor, the specific implementation of each step and the technical effect produced are the same as those in the aforementioned method embodiment. For the sake of brief description, the parts not mentioned in this embodiment can be referred to the corresponding contents in the aforementioned method embodiment.

[0073] The term "and / or" that appears in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship; the word "comprising" does not exclude the existence of elements or steps that are not listed in the claims. The word "one" or "an" placed before an element does not exclude the existence of multiple such elements. The present invention can be implemented with the aid of hardware including several different elements and with the aid of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

[0074] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0075] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0076] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0077] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0078] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0079] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A lens module test structure, characterized in that: The test structure of the lens module includes a transmitter module, a receiver module, a mounting platform and a test board, wherein the mounting platform is used to mount the transmitter module and the receiver module, and the test board is used to reflect the light signal emitted by the transmitter module so that the receiver module obtains a test photo of the light spot area on the test board; According to the test photos, performance parameters of the transmitting end module and the receiving end module of the lens module are obtained; The mounting platform is provided with a first mounting position and a second mounting position, the first mounting position is used to mount a transmitting end module in the lens module, the second mounting position is used to mount a receiving end module in the lens module, and the mounting platform is used to adjust the relative position between the second mounting position and the test board; the test board is arranged in the relative direction of the first mounting position; A six-axis platform is arranged on the mounting platform, and the second mounting position is arranged on the six-axis platform; the six-axis platform is used to adjust the relative distance and relative angle between the second mounting position and the test board so that the light spot area fills the field of view of the receiving end module; the six-axis platform is also used to adjust the distance between the second mounting position and the first mounting position so that the receiving end module can achieve clear imaging.

2. The lens module test structure according to claim 1, characterized in that: The distance between the second installation position and the test board is less than or equal to 1m.

3. The lens module test structure according to claim 1, characterized in that: The test plate is a diffuser plate.

4. A lens module testing method, characterized in that: A test structure of a lens module applied to any one of claims 1 to 3, wherein the test structure of the lens module comprises a transmitting end module, a receiving end module, a mounting platform and a test board, and the test method of the lens module comprises: Installing the transmitting end module and the receiving end module on the installation platform; Adjusting the relative position between the receiving end module and the test board so that the receiving end module photographs the light spot area on the test board to obtain a test photo; wherein the light spot area is the area formed on the test board by the light signal emitted by the transmitting end module; According to the test photos, the performance parameters of the transmitting end module and the receiving end module of the lens module are obtained.

5. The lens module testing method according to claim 4, characterized in that: The adjusting the relative position between the receiving end module and the test board includes: The relative distance between the receiving end module and the test board is adjusted so that the distance between the receiving end module and the test board is less than 1 m.

6. The lens module testing method according to claim 5, characterized in that: The adjusting the relative position between the receiving end module and the test board further includes: The relative distance and relative angle between the receiving end module and the test board are adjusted so that the light spot area fills the field of view of the receiving end module.

7. A lens module testing device, characterized in that: A test structure for a lens module according to any one of claims 1 to 3, the test structure comprising a transmitting end module, a receiving end module, a mounting platform and a test board, the test device for the lens module comprising: An installation module, used for installing the transmitting end module and the receiving end module on the installation platform; An adjustment module, used for adjusting the relative position between the receiving end module and the test board, so that the receiving end module can photograph the light spot area on the test board to obtain a test photo; wherein the light spot area is the area formed on the test board by the light signal emitted by the transmitting end module; The testing module is used to obtain the performance parameters of the transmitting end module and the receiving end module of the lens module according to the testing photos.

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