Multifunctional laser projector module performance test platform

Abstract

The utility model relates to the technical field of optical testing, in particular to a multifunctional laser projector module performance testing platform which comprises an imaging screen, a source meter, an industrial camera and a control terminal. A first guide rail is arranged on one side of the imaging screen, a first sliding table is arranged on the first guide rail, a multi-layer objective table and a lifting part are arranged on the first sliding table, and a lifting table is arranged on the lifting part; a second guide rail is arranged on the other side of the imaging screen; a bearing table is arranged on the second guide rail; a camera support is arranged on one side of the second guide rail, and the industrial camera is arranged on the camera support. The effective stroke of the first guide rail is 0-5 m, and the effective stroke of the second guide rail is 0-60 cm. Aiming at the technical problem that the existing test system has defects, the test system can meet the test of different types of modules such as a structured light module, a TOF (Time of Flight) module, a linear structured light module, a three-wire structured light module, a floodlight source module and the like through simple structural change, has good compatibility, and greatly improves the test flexibility and convenience.

Description

Technical Field

[0001] The utility model relates to the technical field of optical testing, and particularly relates to a performance testing platform for a multifunctional laser projector module. Background Art

[0002] In the existing technology, the performance testing of the laser projector module is mainly carried out through simulation testing in a laboratory environment. This kind of testing mainly sets a series of parameters on the testing machine, such as the testing distance, controlled temperature, driving current, exposure time, etc., and then evaluates the performance of the laser projector module through special testing equipment and software. Since the projector module is divided into a structured light module, a TOF module, and a floodlight module, and the light spots are divided into single-point, multi-point, linear array, and area array, and the different application scenarios of customers are different, the testing distance, the used screen, and the shooting method (transmission type or reflection type) are not the same, and the differences are often very large.

[0003] The current solution of the existing technology is to customize different testing machines for different technical solution modules or modules with different testing requirements. However, the existing testing systems often can only test specific types of modules, and there may also be problems in terms of compatibility. Due to the large differences in screens, different light movement paths, and large differences in testing distances, it is difficult for existing equipment to be compatible with the testing requirements of various products. For example, it can only test the structured light module or the TOF module, and cannot test other types of modules. For example, it cannot simultaneously meet the transmission type far-field test and the reflection type far-field test, or cannot be compatible with the white screen and gray screen tests at the same time. The customization is high and the economic investment is large, which brings great troubles to production enterprises. Summary of the Utility Model

[0004] Aiming at the technical problem of the defects existing in the existing testing system, the utility model provides a performance testing platform for a multifunctional laser projector module, which can meet the testing of different types of modules such as structured light modules, TOF modules, one-line structured light modules, three-line structured light modules, and floodlight modules through simple structural changes, has good compatibility, and greatly improves the flexibility and convenience of testing.

[0005] The technical solution provided by the utility model is: a multifunctional laser projector module performance test platform, including an imaging screen, a source meter, an industrial camera and a control terminal, the source meter is used to be electrically connected to the laser projector module, and the control terminal is electrically connected to the source meter and the industrial camera; a first guide rail is arranged on one side of the imaging screen, a first slide is arranged on the first guide rail, a multi-layer stage and a lifting part are arranged on the first slide, the lifting part is located on the side of the multi-layer stage close to the imaging screen, a lifting platform is fixedly arranged on the output end of the lifting part, and the lifting platform is used to place the laser projector module; a second guide rail is arranged on the other side of the imaging screen, a bearing platform is movably arranged on the second guide rail, and the bearing platform is used to place the laser projector module; a camera bracket is arranged on the side of the second guide rail away from the imaging screen, and the industrial camera is arranged on the camera bracket; the effective stroke of the first guide rail is 0-5m, and the effective stroke of the second guide rail is 0-60cm.

[0006] Optionally, it also includes a TEC thermostat and a water cooler, both of which are electrically connected to the control terminal, the water cooler is connected to the TEC thermostat, and the cooling end of the TEC thermostat is fixed on the lifting platform and the supporting platform.

[0007] Optionally, a first angle platform is arranged on the lifting platform and / or the supporting platform.

[0008] Optionally, a second angle platform is provided on the camera bracket, and the industrial camera is connected to the camera bracket via the second angle platform.

[0009] Optionally, a rotating platform is arranged on the lifting platform and / or the supporting platform.

[0010] Optionally, the imaging screen is a white screen or a gray screen.

[0011] Optionally, the lifting part includes a first lead screw and a limiting column, the limiting column is located on both sides of the lead screw, and the lifting platform is threadably matched with the first lead screw.

[0012] Optionally, the second guide rail is a screw guide rail, and the bearing platform is threadedly matched with the screw guide rail.

[0013] Beneficial Effects

[0014] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects: Aiming at the technical problem of defects existing in the existing test system, a performance test platform for a multi-functional laser projector module of the present utility model can meet the tests of different types of modules such as structured light modules, TOF modules, one-line structured light modules, three-line structured light modules, and floodlight modules through simple structural changes, has good compatibility, and greatly improves the flexibility and convenience of testing. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a performance test platform for a multi-functional laser projector module proposed in an embodiment of the present utility model. Detailed Embodiments

[0016] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the drawings and embodiments.

[0017] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings. The terms "first", "second", etc. used in the present utility model are set for the convenience of describing the technical solution of the present utility model and have no specific limiting effect, and are all general references, and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" 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, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradiction or conflict, and are all within the scope of protection required by the present utility model.

[0018] Embodiment 1

[0019] Combined with the attached Figure 1 , this embodiment proposes a performance test platform for a multifunctional laser projector module, which includes an imaging screen 10, a source meter 11, an industrial camera 12, and a control terminal. The source meter 11 is used to be electrically connected to the laser projector module, and the control terminal is electrically connected to the source meter 11 and the industrial camera 12.

[0020] A first guide rail 13 is provided on one side of the imaging screen 10. A first sliding table 14 is provided on the first guide rail 13. A multi-layer carrier table 15 and a lifting part are provided on the first sliding table 14. The lifting part is located on the side of the multi-layer carrier table 15 close to the imaging screen 10. A lifting table 16 is fixedly provided on the output end of the lifting part, and the lifting table 16 is used to place the laser projector module.

[0021] On the other side of the imaging screen 10, a second guide rail 17 is provided. A carrier 18 is movably arranged on the second guide rail 17, and the carrier 18 is used to place the laser projector module. On the side of the second guide rail 17 facing away from the imaging screen 10, a camera support 19 is provided, and the industrial camera 12 is arranged on the camera support 19.

[0022] In this embodiment, the effective stroke of the first guide rail 13 is 0 - 5m, and the effective stroke of the second guide rail 17 is 0 - 60cm.

[0023] Aiming at the technical problem that the existing test system has defects, a multifunctional performance test platform for laser projector modules in this embodiment can meet the tests of different types of modules such as structured light modules, TOF modules, one - line structured light modules, three - line structured light modules, and floodlight modules through simple structural changes, has good compatibility, and greatly improves the flexibility and convenience of testing.

[0024] The working mode of a multifunctional performance test platform for laser projector modules in this embodiment is as follows: First, select the laser projector module to be tested, and the laser projector module can be any one of structured light modules, TOF modules, line structured light modules, floodlight modules, etc. Then, select the first guide rail 13 or the second guide rail 17 with the corresponding effective stroke according to the test distance requirement, and install the laser projector module to be tested on the corresponding lifting platform 16 or carrier 18. According to the light spot projection mode, such as transmissive or reflective, select the imaging screen 10 with the corresponding specification and install the imaging screen 10.

[0025] Then set relevant parameters, such as the test distance, that is, use the first guide rail 13 or the second guide rail 17 to move the lifting platform 16 or the carrier 18 to the corresponding distance position. The relevant parameters also include the camera exposure time and the working current of the laser projector module to be tested, including peak current, pulse width, duty cycle, etc.

[0026] Finally, start the source meter 11, power on relevant components such as the laser projector module to be tested, and run the test program on the computer upper computer for testing. The system will automatically perform the test according to the set parameters. During the test process, the system will record various performance data of the module.

[0027] Combined with the above - mentioned working mode, in this embodiment, the effective stroke of the first guide rail 13 is 0 - 5m, and its total length can be about 5.3m. The 5.3 - meter - long first guide rail 13 can perform accurate light spot tests within a distance of 0 - 5m to meet the different test distance requirements of speckle structured light modules, TOF modules, and floodlight modules.

[0028] In this embodiment, the effective stroke of the second guide rail 17 is 0 to 60 cm, and its total length can be about 70 cm. It can perform precise spot tests within a distance of 0 to 60 cm to meet the different test distance requirements of the line structured light module.

[0029] In an alternative embodiment, the second guide rail 17 is a lead screw guide rail. The carrier table 18 is in threaded cooperation with the lead screw guide rail. By driving the lead screw of the second guide rail 17, the carrier table 18 can be driven to move. It can be envisioned that the lead screw guide rail can be manual or electric.

[0030] Moreover, in this embodiment, the source meter 11 is used to supply power to the laser projector module, and the industrial camera 12 is used to capture the far-field spot on the imaging screen 10. The control terminal can be a computer, which is used for setting relevant test parameters of the test platform, program control, calculation, and displaying the spot and test results.

[0031] It can be envisioned that the multi-layer carrier table 15 in this embodiment can be used to carry the source meter 11 or other equipment related to measurement and testing to improve the convenience of use.

[0032] In one embodiment, the lifting part includes a first lead screw 301 and a limit post 302. The lifting table 16 is in threaded cooperation with the first lead screw 301. Thus, by rotating the first lead screw 301, the lifting of the lifting table 16 can be achieved, and further the height adjustment of the laser projector module can be realized. The limit post 302 plays a role in limiting the lifting of the lifting table 16 during the lifting process.

[0033] In other embodiments, a first angle table 20 is provided on the lifting table 16 to adjust the angle of the laser projector module on the lifting table 16. Similarly, the first angle table 20 can also be provided on the carrier table 18 to adjust the angle of the laser projector module on the carrier table 18.

[0034] In a further embodiment, a rotating table can also be provided on the lifting table 16 and the carrier table 18 to achieve the horizontal rotation of the laser projector module, that is, to adjust the projection angle of the laser projector module relative to the imaging screen 10 in the horizontal direction to improve the flexibility of the test.

[0035] Moreover, a second angle table 21 can also be provided on the camera bracket 19. The industrial camera 12 is connected to the camera bracket 19 through the second angle table 21. Thus, the shooting angle of the industrial camera 12 relative to the imaging screen 10 can be adjusted.

[0036] In addition, in one embodiment, it further includes a TEC temperature controller and a water chiller. The water chiller is connected to the TEC temperature controller, and the refrigerating end of the TEC temperature controller is fixed on the lifting table 16 and the carrying table 18. In this embodiment, the TEC temperature controller is used in combination with the water chiller to control the substrate temperature of the projector module to be tested. Combining the foregoing embodiments, both the TEC temperature controller and the water chiller are electrically connected to a control terminal such as a computer to be controlled and operated through the computer.

[0037] It is conceivable that based on the use of a high-performance TEC semiconductor temperature controller, precise temperature control can be achieved in the temperature range of 0 to 125 °C, meeting the performance tests of the laser projector module at different temperatures to verify the performance at different operating temperatures.

[0038] It is conceivable that since the multifunctional laser projector module performance test platform of this embodiment can meet the tests of different types of modules, therefore, the corresponding imaging screen 10 adopts a white screen or a gray screen as needed. Among them, the white screen is generally a light-transmitting glass sandwich paper structure for transmissive solutions.

[0039] The following are two examples of test cases: In the first case, a 5.3-meter-long first guide rail 13 is used, in combination with The white screen's the imaging screen 10, and an industrial camera 12. Among them, the industrial camera 12 and the first guide rail 13 are located on both sides of the imaging screen 10, forming a transmissive scheme, which can be used for the tests of speckle structured light modules, TOF modules, omnidirectional light source modules, etc.

[0040] In another case, a 70-cm-long second guide rail 17 is used, in combination with a white screen or a gray screen, and an industrial camera 12. Among them, the industrial camera 12 and the second guide rail 17 are located on the same side of the imaging screen 10. The gray screen is made of KT board and can be fixed on the projectable imaging screen 10 in the previous case with magnets or clips, thus forming a reflective scheme, which can be used for the test of the line structured light module. In this case, conventional 0 - 60 cm within the test distance range includes laser projectors such as one-line and three-line structured light modules of the projector module tests can be achieved, fully meeting the current market demand.

[0041] Combining all the foregoing descriptions, the multifunctional laser projector module performance test platform of this embodiment has multiple advantages. On the one hand, it has good compatibility and can meet the tests of different types of modules such as structured light modules, TOF modules, one-line structured light modules, three-line structured light modules, and omnidirectional light source modules. On the other hand, the test system of the present invention not only meets the transmissive far-field test but also the reflective far-field test, and at the same time is compatible with the white screen and gray screen tests, providing multiple test options to meet different test requirements, making the test more diversified and refined.

[0042] The above has schematically described the present utility model and its implementation manners. This description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the present utility model. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural manners and embodiments similar to the technical solution without departing from the gist of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A multifunctional laser projector module performance test platform, characterized in that: It includes an imaging screen, a source meter, an industrial camera and a control terminal, wherein the source meter is used to be electrically connected to the laser projector module, and the control terminal is electrically connected to the source meter and the industrial camera; A first guide rail is provided on one side of the imaging screen, a first slide is provided on the first guide rail, a multi-layer stage and a lifting part are provided on the first slide, the lifting part is located on a side of the multi-layer stage close to the imaging screen, a lifting platform is fixedly provided on the output end of the lifting part, and the lifting platform is used to place a laser projector module; A second guide rail is provided on the other side of the imaging screen, a carrying platform is movably provided on the second guide rail, and the carrying platform is used to place the laser projector module; a camera bracket is provided on the side of the second guide rail away from the imaging screen, and the industrial camera is arranged on the camera bracket; The effective stroke of the first guide rail is 0 to 5 m, and the effective stroke of the second guide rail is 0 to 60 cm.

2. A multifunctional laser projector module performance testing platform according to claim 1, characterized in that: It also includes a TEC thermostat and a water cooler, both of which are electrically connected to the control terminal, the water cooler is connected to the TEC thermostat, and the cooling end of the TEC thermostat is fixed on the lifting platform and the bearing platform.

3. A multifunctional laser projector module performance testing platform according to claim 1, characterized in that: The lifting platform and / or the bearing platform is provided with a first angle platform.

4. A multifunctional laser projector module performance testing platform according to claim 1, characterized in that: The camera bracket is provided with a second angle platform, and the industrial camera is connected to the camera bracket via the second angle platform.

5. A multifunctional laser projector module performance test platform according to any one of claims 1 or 3, characterized in that: The lifting platform and / or the bearing platform is provided with a rotating platform.

6. A multifunctional laser projector module performance testing platform according to claim 1, characterized in that: The imaging screen is a white screen or a gray screen.

7. A multifunctional laser projector module performance testing platform according to claim 1, characterized in that: The lifting part includes a first lead screw and a limiting column, the limiting column is located on both sides of the lead screw, and the lifting platform is threadedly matched with the first lead screw.

8. A multifunctional laser projector module performance testing platform according to claim 1, characterized in that: The second guide rail is a screw guide rail, and the bearing platform is threadedly matched with the screw guide rail.

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