Laser module test fixture

Abstract

The utility model discloses a laser module test fixture which comprises a base. The fixed seat is arranged on the base; a module fixing structure for embedding the laser module is arranged on the fixing seat; the limiting cover is arranged on the fixed seat or the base and is used for limiting the laser module mounted on the module fixing structure; the ejector pin power supply assembly can be electrically connected with a voltage source of the test base station and is used for directly electrifying the laser projection module; and the power supply connector can be electrically connected with a voltage source of the test base station and is associated with the laser projection module so as to electrify the laser module through a flat cable welded on the laser module. Through the single test fixture, the laser modules at two different stages can be tested, and the cost of respectively designing and manufacturing special fixtures for different types of modules is avoided.

Description

Technical Field

[0001] This application relates to the field of semiconductor laser testing, and more specifically to a test fixture for laser modules. Background Art

[0002] A linear laser projector is a laser module based on time-of-flight (TOF) technology, which can project one or more linear lasers. Chinese Patent CN202311274909.1 discloses a three-line laser projector, which mainly consists of two parts: a laser light source and an optical lens. The laser light source uses a vertical-cavity surface-emitting laser (VCSEL) chip, which is widely used in laser emission devices due to its high efficiency and compact volume. The optical lens has a unique design, with a wavy bottom surface and a flat or curved top surface; this special shape helps to precisely shape the infrared light emitted by the laser light source. The infrared light shaped by the optical lens can form clear and stable linear lasers.

[0003] In the design completion and mass production and shipping stages, it is essential to test the performance of the linear laser projector. These tests include the evaluation of the anti-aging performance and beam pattern of the laser projector. For products in the non-mass production stage (linear laser modules with flexible cables soldered) and products in the mass production stage (linear laser modules with flexible cables soldered), the test quantities and test requirements are different. Among them, the test quantity in the non-mass production stage is relatively small, and the test requirements are to test the light-emitting performance of the linear laser module and the stability of the transmission current of the flexible cable soldered to the linear laser module (i.e., the reliability of the solder joint between the flexible cable and the linear laser module and the reliability of the flexible cable performance); while for the linear laser module products in the mass production stage, the test quantity is large, and the main test requirement is to test the light-emitting performance of the linear laser module to ensure the consistency and reliability of product performance in large-scale production.

[0004] For the above two test requirements, two different test fixtures are needed, and the requirements for the two test fixtures lead to an increase in test costs; while using a single method of inserting and removing the flexible cable to test the linear laser in the mass production stage, each linear laser module needs to be plugged and unplugged during testing, resulting in low test efficiency. To solve this problem, this application proposes a universal test fixture for laser modules, which can adapt to the test requirements of products in different stages. Summary of the Invention

[0005] One advantage of this application is to provide a test fixture for laser modules, wherein, through a single test fixture, the testing of laser modules in two different stages is realized, avoiding the cost of designing and manufacturing special fixtures for different types of modules respectively.

[0006] Another advantage of the present application lies in providing a laser module test fixture. Among them, for the same test fixture, when testing the products in the mass production stage, there is no need to power on through the wiring harness. Power can be applied when fixing the linear laser module, improving the efficiency of testing the linear laser module.

[0007] To achieve at least one of the above advantages or other advantages and purposes, according to one aspect of the present application, there is provided a laser module test fixture, which includes:

[0008] A base;

[0009] A fixing seat, provided on the base; a module fixing structure for embedding the laser module is provided on the fixing seat;

[0010] A limiting cover, provided on the fixing seat or the base, for limiting the laser module installed on the module fixing structure;

[0011] A thimble power supply component, which can be electrically connected to the voltage source of the test base, for directly powering on the laser projection module;

[0012] A power supply connector, which can be electrically connected to the voltage source of the test base, and is associated with the laser projection module to power on the laser module through the wiring harness welded on the laser module.

[0013] In an embodiment of the laser module test fixture according to the present application, the limiting cover is rotatably connected to the fixing seat, and the thimble power supply component is provided on the limiting cover.

[0014] In an embodiment of the laser module test fixture according to the present application, the thimble power supply component includes multiple groups of thimbles, a thimble fixing member connected to the fixing seat to fix the thimbles, and a power connection joint for powering on the thimbles.

[0015] In an embodiment of the laser module test fixture according to the present application, the power supply connector is provided on the base.

[0016] In an embodiment of the laser module test fixture according to the present application, the power supply connector includes a splitter, and the wiring harness welded on the laser module is connected to the splitter.

[0017] In an embodiment of the laser module test fixture according to the present application, the fixing seat is rotatably connected to the base.

[0018] In an embodiment of the laser module test fixture according to the present application, the included angle between the fixing seat and the base is 90°.

[0019] In an embodiment of the laser module test fixture according to the present application, the limiting cover is provided with a pressing portion for pressing against the laser module.

[0020] In an embodiment of the laser module testing fixture according to the present application, the module fixing structure includes a connecting portion and a module fixing portion integrated on the connecting portion, and a module fixing cavity for the laser module to be embedded is provided on the module fixing portion.

[0021] In an embodiment of the laser module testing fixture according to the present application, a buckle is provided on the limit cover, and the buckle is detachably connected to the fixed seat.

[0022] Through the understanding of the subsequent description and the drawings, the further objects and advantages of the present application will be fully reflected.

[0023] These and other objects, features and advantages of the present application are fully reflected through the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] From the following detailed description of the embodiments of the present application in conjunction with the drawings, these and / or other aspects and advantages of the present application will become clearer and easier to understand, wherein:

[0025] Figure 1 Illustrates the installation schematic diagram of the laser module testing fixture for the laser module in the non-mass production stage.

[0026] Figure 2 Illustrates another installation schematic diagram of the laser module testing fixture for the laser module in the non-mass production stage.

[0027] Figure 3 Illustrates the installation schematic diagram of the laser module testing fixture for the laser module in the mass production stage.

[0028] Figure 4 Illustrates another installation schematic diagram of the laser module testing fixture for the laser module in the mass production stage.

[0029] Figure 5 Illustrates the schematic diagram of another perspective of the laser module testing fixture.

[0030] Figure 6 Illustrates the partial exploded view of the laser module testing fixture.

[0031] Figure 7 Illustrates the partial exploded view of another perspective of the laser module testing fixture.

[0032] Figure 8 Illustrates the exploded view of the laser module testing fixture.

[0033] Figure 9 Illustrates the exploded view of another perspective of the laser module testing fixture. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The terms and words used in the following specification and claims are not limited to their literal meanings, but are used only by the inventors to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of the various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined in the appended claims and their equivalents.

[0035] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be construed as a limitation on the number.

[0036] Although ordinal numbers such as "first", "second", etc. will be used to describe various components, those components are not limited herein. The term is only used to distinguish one component from another. For example, the first component can be called the second component, and similarly, the second component can also be called the first component, without departing from the teachings of the concept of the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0037] The terms used herein are for the purpose of describing various embodiments only and are not intended to be limiting. As used herein, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. Additionally, it will be understood that the terms "comprises" and / or "has" when used in this specification specify the presence of the stated features, numbers, steps, operations, components, elements, or combinations thereof, without precluding the presence or addition of one or more other features, numbers, steps, operations, components, elements, or combinations thereof.

[0038] Overview of the Application

[0039] The present application provides a laser module test fixture, which includes a base as the basic part of the fixture and used to support the entire structure, a fixing seat forming a certain angle with the base and used to fix the laser module, a module fixing structure provided on the fixing seat and specifically used to fix the laser module, and a limiting cover rotatably connected to the fixing seat to limit the laser module to ensure its stability during the test; wherein a thimble power supply component for directly powering the laser module is provided on the limiting cover, and a power supply connector for powering the laser module through a wiring harness passing through the laser module is provided on the base.

[0040] For a laser module in the mass production stage, during the test, the laser module is positioned in the fixing structure, and then the thimble of the thimble power supply component contacts the laser module. At this time, the thimble power supply component is electrically connected to the voltage source, and the power supply component is not connected to the voltage source; the current of the voltage source powers the laser module through the thimble power supply component to test the light-emitting performance of the laser module.

[0041] For a laser module in the non-mass production stage, during testing, the laser module is positioned in a fixed structure, and then the flexible cable of the laser module is connected to a power-on component; at this time, the power-on component is electrically connected to a voltage source, and the thimble power supply component is not connected to the voltage source; the current of the voltage source powers the laser module through the power-on component and the flexible cable to test the light-emitting performance of the laser module and the reliability of the flexible cable.

[0042] After introducing the basic principle of the present application, various non-limiting embodiments of the present application will be specifically introduced below with reference to the accompanying drawings.

[0043] Schematic laser module test fixture

[0044] As Figures 1 to 9 shown, the laser module test fixture according to the embodiment of the present application is illustrated. The laser module test fixture of the present application has compatibility for two different stages of laser modules: one is a laser module in the mass production stage, and the other is a laser module in the non-mass production stage. This design allows the same test fixture to be applicable to the test requirements of two different stages of laser modules at the same time, thereby saving costs and improving test efficiency. Specifically, the laser module test fixture of the present application is used to test a laser module that emits three-line laser light. The laser module test fixture includes a base 10, a fixed seat 20, a module fixing structure 30, a limit cover 40, a thimble power supply component 50, and a power supply connector 60; wherein the base 10 is fixed to the test base of the test laser module to achieve overall fixation of the laser module. The fixing method of the base 10 on the test base is by bolt fixation, which simplifies the fixing method of the laser module test fixture and ensures the stability of the base 10 on the test base to guarantee the accuracy of the tested laser. In this embodiment, the base 10 is made of a metal material, such as aluminum or steel; the bases of aluminum and steel have high strength and good high-temperature resistance.

[0045] Refer to Figures 5 - 9, the fixing base 20 is fixed on the base 10, and the fixing base 20 is hinged to one end of the base 10. An included angle is formed between the fixing base 20 and the base 10. Specifically, a 90° included angle is formed between the fixing base 20 and the base 10. In this embodiment, the fixing base 20 and the base 10 are fixedly locked to ensure that the fixing base 20 will not undergo relative displacement relative to the base 10 without external force. And because the fixing base 20 and the base 10 are connected by a hinge, the fixing force between the fixing base 20 and the base 10 can also be loosened, and then the included angle between the fixing base 20 and the base 10 can be adjusted by an external force, and the projection angle of the laser projector located on the fixing base 20 can be adjusted to improve the accuracy of testing the linear laser emitted by the laser projector. In other deformed embodiments, the fixing base 20 and the base 10 are integrated. A concave installation part 21 is formed on one side of the fixing base 20, and the middle area of the installation part 21 is dug through to form a through hole 211 through which the laser can pass.

[0046] Reference Figures 5 - 9 , the module fixing structure 30 is installed on the fixing base 20 and fixed by bolts. The module fixing structure 30 includes a connecting part 31 and a module fixing part 32 integrated with the connecting part 31. The connecting part 31 is a plate-like structure, and the connecting part 31 is embedded in the installation part 21. The module fixing part 32 is embedded in the through hole 211, and then an internal hexagonal bolt is screwed into the side wall of the fixing base 20 to fix the module fixing part 32. The module fixing part 32 has a module fixing cavity 321 with a through cavity, and the module fixing cavity 321 is used for embedding the laser module to fix the laser module. The side of the module fixing cavity 321 close to the light output of the laser projector is flared to reduce the influence on the laser.

[0047] Two symmetrically arranged connecting ears 22 protrude from one side of the fixing base 20, and a connecting shaft 221 is connected to the connecting ears 22. The limiting cover 40 is rotatably connected to the fixing base 20 through the connecting shaft 221. A buckle 42 is rotatably connected to the side of the limiting cover 40 away from the connection with the connecting shaft 221, and the buckle 42 is rotatably located on the limiting cover 40 through a torsion spring. A connecting rod 23 is arranged on the side of the fixing base 20 away from the connecting ears 22, and the buckle 42 buckles the connecting rod 23 after the limiting cover 40 rotates.

[0048] A recess is formed in the limiting cover 40 near the bottom of the laser module to form a positioning recess 41; a pressing portion 411 is provided on the positioning recess 41. The pressing portion 411 can be formed by a local protrusion of the positioning recess 41, or the pressing portion 411 is a rubber block fixed in the positioning recess 41. After the limiting cover 40 is covered on the fixing base 20, the pressing portion 411 abuts against the bottom of the laser module, so as to fix the laser module and ensure the reliability of the laser module during the testing process.

[0049] Reference Figures 3 - 7 The thimble power supply assembly 50 is used to quickly power on a large number of laser modules in the mass production stage to test the light-emitting performance of the laser modules. The thimble power supply assembly 50 includes multiple groups of thimbles 51, thimble fixing members 52 and power connection joints 53. A thimble fixing portion 521 is provided on the thimble fixing member 52, and the thimble 51 passes through the thimble fixing portion 521 and one end thereof penetrates out of the surface of the thimble fixing member 52. A through groove 43 is formed in the limiting cover 40. The thimble fixing member 52 is fixed to the side of the limiting cover 40 away from the positioning recess 41 by bolts, and the other end of the thimble 51 located on the thimble fixing member 52 passes through the through groove 42. The power connection joint 53 is used to connect to the voltage source of the test base; one end of the thimble 51 passing through the thimble fixing member 52 is electrically connected to the power connection joint 53.

[0050] Reference Figure 3 and Figure 4 When testing a laser module in the mass production stage, the laser module is embedded in the module fixing cavity 321, and then the limiting cover 40 is flipped. At this time, the pressing portion on the limiting cover 40 abuts against the substrate of the laser module 70 to fix the laser module. At this time, the side of the thimble 51 away from the power connection joint 53 is in electrical contact with the substrate of the laser module, and the current of the voltage source passes through the power connection joint 53 and the thimble 51 to light up the laser module.

[0051] Reference Figure 1 and Figure 2 The power supply joint 60 is fixed to the side of the base away from the fixing base 20. The power supply joint 60 has a tap joint 61, and the tap joint 61 is used for the wiring harness 71 of the laser module 70 to be connected; specifically, the wiring harness 71 of the laser module 70 has a wiring harness joint 711, and the wiring harness joint 711 is inserted into the tap joint 61. The power supply joint 60 is connected to the voltage source, and then the laser module is lit up through the wiring harness. When testing a laser module in the non-mass production stage, the laser module is embedded in the module fixing cavity 321, and then the limiting cover 40 is flipped. At this time, the pressing portion on the limiting cover 40 abuts against the substrate of the laser module 70 to fix the laser module. Then the wiring harness joint is inserted into the tap joint 61 of the power supply joint 60, so as to light up the laser module and realize the testing of the laser module.

[0052] The basic principles of the present application have been described in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. Additionally, the specific details disclosed above are only for the purpose of illustration and facilitating understanding, rather than limitations. These details do not limit the present application to necessarily implement using the above specific details.

Claims

1. A laser module testing fixture, wherein, Comprising: Base; Fixed seat, disposed on the base, and a module fixing structure for embedding a laser module is provided on the fixed seat; Limit cover, disposed on the fixed seat or the base, for limiting the laser module mounted on the module fixing structure; Pin power supply assembly, electrically connectable to the voltage source of the test base, for directly powering on the laser projection module; Power supply connector, electrically connectable to the voltage source of the test base, associated with the laser projection module to power on the laser module through the wiring harness welded on the laser module.

2. The laser module testing fixture according to claim 1, wherein, The limit cover is rotatably connected to the fixed seat, and the pin power supply assembly is disposed on the limit cover.

3. The laser module test fixture according to claim 2, wherein, The pin power supply assembly includes multiple groups of pins, a pin fixing member connected to the fixed seat to fix the pins, and a power connection joint for powering on the pins.

4. The laser module testing fixture according to claim 1, wherein The power supply connector is disposed on the base.

5. The laser module testing fixture according to claim 4, wherein, The power supply connector includes a splitter, and the wiring harness welded on the laser module is connected to the splitter.

6. The laser module testing fixture according to claim 1, wherein, The fixed seat is rotatably connected to the base.

7. The laser module testing fixture according to claim 1, wherein, The included angle between the fixed seat and the base is 90°.

8. The laser module testing fixture according to claim 1, wherein, The limit cover is provided with a pressing portion for pressing against the laser module.

9. The laser module testing fixture according to claim 1, wherein, The module fixing structure includes a connecting portion and a module fixing portion integrated with the connecting portion, and a module fixing cavity for embedding the laser module is provided on the module fixing portion.

10. The laser module testing fixture according to claim 1, wherein, The limit cover is provided with a buckle, and the buckle is detachably connected to the fixed seat.

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