Visible light laser sorting test tool
By designing a compact visible light laser sorting and testing fixture, the integrated design solves the problems of high testing cost and complex equipment for single-tube green semiconductor lasers, achieving low-cost and high-efficiency optical power and spectrum testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING LIANSANSHENG PHOTOELECTRIC TECH CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing technology, the testing of single-tube green semiconductor lasers mainly uses expensive automated testing and sorting equipment, which has disadvantages such as high cost, complex equipment structure and large size.
A visible light laser sorting test fixture was designed, integrating a test fixture housing, an optical power detection component, and a 6-position piano key switch. It includes a circuit board, a common socket, a test start switch, a switching switch, a socket fixing component, a wavelength correction potentiometer, a pure copper heat sink, a sliding base, and an optical power detection component, forming a compact and efficient test system that simplifies the test process and improves test efficiency.
It significantly reduces material and manufacturing costs, simplifies the testing process, and improves testing efficiency and accuracy, making it suitable for rapid and accurate optical power and spectral testing of TO18 and TO38 packaged lasers.
Smart Images
Figure CN224189495U_ABST
Abstract
Description
A visible light laser sorting and testing fixture Technical Field
[0001] This utility model relates to the field of optoelectronic packaging and testing technology for semiconductor lasers, and in particular to a sorting and testing fixture for visible light lasers. Background Technology
[0002] With the significant advancements in chip technology for low-power visible light semiconductor lasers such as green and blue light in recent years, the performance indicators, parameter consistency, and reliability of lasers packaged in TO18 and TO38 coaxial packages have been greatly improved, leading to their widespread application in the civilian sector. For example, in the field of civilian green light levels, the previous solution of pumping crystals with infrared 808nm semiconductor lasers to produce green light is gradually being replaced by a lower-cost single-tube green light semiconductor laser solution. In these applications, users prioritize the lowest price and do not require very high accuracy in photoelectric parameter testing; they only need to perform graded testing on the main parameters that customers care about.
[0003] However, in the current industry, the testing of single-tube green semiconductor lasers mainly uses expensive automated testing and sorting equipment, which has disadvantages such as high cost, complex equipment structure, and large size. Summary of the Invention
[0004] The purpose of this invention is to provide a visible light laser sorting and testing fixture, which solves the problem that the current testing of single-tube green semiconductor lasers mainly uses expensive automated testing and sorting equipment, which has the disadvantages of high cost, complex equipment structure and large size.
[0005] To achieve the above objectives, this utility model provides a visible light laser sorting and testing fixture, which includes a testing fixture box, an optical power detection component, and a 6-position key switch. The optical power detection component and the 6-position key switch are provided at the top of the testing fixture box, and a voltage display meter, a current display meter, and a power display meter are also provided at the top of the testing fixture box.
[0006] The optical power detection component includes a circuit board, a common socket, a test start switch, a switching switch, a socket fixing component, a wavelength correction potentiometer, a pure copper heat sink, two sliding seats, and the optical power detection component itself. The circuit board is installed inside the test fixture housing. The common socket, the test start switch, the switching switch, and the wavelength correction potentiometer are disposed on the upper surface of the circuit board. The operating terminals of the test start switch and the switching switch extend to the top of the test fixture housing. The socket fixing component is also disposed on the upper surface of the circuit board and is located outside the common socket. The pure copper heat sink is disposed at the top of the socket fixing component and is located on the upper surface of the test fixture housing. The top of the common socket extends to the top of the pure copper heat sink. Sliding seats are disposed on both sides of the upper surface of the pure copper heat sink. The optical power detection component is slidably mounted between the two sliding seats via a sliding positioning shaft. The common socket is used to fix the packaged laser to be tested, and the test terminal of the optical power detection component corresponds to the packaged laser to be tested.
[0007] The optical power detection component includes a fixed bracket, an optical attenuator, a photodetector, a photodetector pressure plate, and a spectrometer fiber optic connector. The fixed bracket has sliding positioning shafts on both sides. The fixed bracket has the optical attenuator, the photodetector, the photodetector pressure plate, and the spectrometer fiber optic connector arranged sequentially from bottom to top inside. The fixed bracket has a spectral test light passage and an optical power test light passage on the side facing the pure copper heat sink.
[0008] The test fixture box is composed of a base plate and an outer shell that are interlocked. The top of the outer shell is equipped with the 6-position piano key switch, the voltage display meter, the current display meter, and the power display meter.
[0009] The test fixture box also includes a power board with a power interface located on the side of the test fixture box. The test fixture box is equipped with a power switch located on the side where the power interface is located.
[0010] The 6-position piano key switch consists of 6 constant current driving current setting potentiometers and 6 piano key switch bodies. The 6 constant current driving current setting potentiometers are evenly arranged inside the test fixture box. The top of each constant current driving current setting potentiometer is provided with the piano key switch body, which extends to the outside of the top of the test fixture box. The outside of the test fixture box is also provided with 6 driving current adjustment holes, each driving current adjustment hole corresponding to one of the constant current driving current setting potentiometers.
[0011] The top of the test fixture box is also provided with a dual-wavelength correction potentiometer adjustment hole, which corresponds to the wavelength correction potentiometer.
[0012] This invention relates to a visible light laser sorting and testing fixture, comprising a test fixture housing, an optical power detection unit, and a 6-position key switch. The optical power detection unit includes a circuit board, a common socket, a test start switch, a switching switch, a socket fixing component, a wavelength correction potentiometer, a pure copper heat sink, two sliding seats, and the optical power detection component. This fixture integrates the optical power detection unit, the 6-position key switch, the voltage display meter, the current display meter, and the power display meter onto the test fixture housing, forming a compact and efficient testing system. This integrated design avoids the complex mechanical structure and bulky size of traditional automated testing and sorting equipment, significantly reducing material and manufacturing costs. Furthermore, by fixing the TO18 and TO38 packaged lasers to be tested through the common socket and combining the optical power detection component, rapid and accurate optical power and spectral testing can be performed. This fixture greatly simplifies the testing process. Simultaneously, the 6-position key switch allows users to quickly switch between different drive current settings as needed, further improving testing efficiency. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 is a schematic diagram of the visible light laser sorting and testing fixture provided by this utility model.
[0015] Figure 2 is a partial disassembled structural diagram of the visible light laser sorting and testing fixture provided by this utility model.
[0016] Figure 3 is a block diagram of the low-cost visible light laser sorting and testing system provided by this utility model.
[0017] 1-Voltage display meter, 2-Current display meter, 3-Power display meter, 4-Circuit board, 5-Common socket, 6-Test start switch, 7-Changeover switch, 8-Socket fixing component, 9-Wavelength correction potentiometer, 10-Pure copper heat sink, 11-Sliding base, 12-Sliding positioning shaft, 13-Encapsulated laser, 14-Fixed bracket, 15-Optical attenuator, 16-Photodetector, 17-Photodetector pressure plate, 18-Spectrometer fiber optic connector, 19-Spectrum test light transmission hole, 20-Optical power test light transmission hole, 21-Base plate, 22-Housing shell, 23-Power board, 24-Power interface, 25-Power switch, 26-Constant current drive current setting potentiometer, 27-Key switch body, 28-Drive current adjustment hole, 29-Dual wavelength correction potentiometer adjustment hole. Detailed Implementation
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0019] Please refer to Figures 1 to 3. This utility model provides a visible light laser sorting and testing fixture, which includes a test fixture box, an optical power detection unit, and a 6-position key switch. The optical power detection unit and the 6-position key switch are provided on the top of the test fixture box. The top of the test fixture box is also provided with a voltage display meter 1, a current display meter 2, and a power display meter 3.
[0020] The optical power detection unit includes a circuit board 4, a common socket 5, a test start switch 6, a switching switch 7, a socket fixing component 8, a wavelength correction potentiometer 9, a pure copper heat sink 10, two sliding seats 11, and an optical power detection component. The circuit board 4 is installed inside the test fixture housing. The common socket 5, the test start switch 6, the switching switch 7, and the wavelength correction potentiometer 9 are arranged on the upper surface of the circuit board 4. The operating terminals of the test start switch 6 and the switching switch 7 extend to the top of the test fixture housing. The socket fixing component 8 is also arranged on the upper surface of the circuit board 4. A socket fixing component 8 is disposed outside the common socket 5. A pure copper heat sink 10 is disposed at the top of the socket fixing component 8. The pure copper heat sink 10 is located on the upper surface of the test fixture box. The top of the common socket 5 extends to the top of the pure copper heat sink 10. Sliding seats 11 are disposed on both sides of the upper surface of the pure copper heat sink 10. The optical power detection component is slidably mounted between the two sliding seats 11 through a sliding positioning shaft 12. The common socket 5 is used to fix the packaged laser 13 to be tested. The test end of the optical power detection component corresponds to the packaged laser 13 to be tested.
[0021] In this embodiment, the optical power detection unit, the 6-position key switch, the voltage display meter 1, the current display meter 2, and the power display meter 3 are integrated into the test fixture housing to form a compact and efficient test system. This integrated design avoids the complex mechanical structure and bulky size of traditional automated testing and sorting equipment, significantly reducing material and manufacturing costs. Furthermore, the TO18 and TO38 packaged lasers 13 to be tested are fixed through the common socket 5, and combined with the optical power detection component, rapid and accurate optical power and spectral testing is performed. This fixture greatly simplifies the testing process. At the same time, the 6-position key switch allows users to quickly switch between different drive current settings as needed, further improving testing efficiency.
[0022] Furthermore, the optical power detection component includes a fixed bracket 14, an optical attenuator 15, a photodetector 16, a photodetector pressure plate 17, and a spectrometer fiber optic connector 18. The fixed bracket 14 has sliding positioning shafts 12 on both sides. The fixed bracket 14 has the optical attenuator 15, the photodetector 16, the photodetector pressure plate 17, and the spectrometer fiber optic connector 18 arranged sequentially from bottom to top inside. The fixed bracket 14 has a spectral testing light passage 19 and an optical power testing light passage 20 on the side facing the pure copper heat sink 10.
[0023] In this embodiment, the optical power detection component is highly integrated and modular in its structural design. The fixed bracket 14 is mounted on the sliding seat 11 of the pure copper heat sink 10 via the sliding positioning shaft 12, allowing the optical power detection component to be flexibly adjusted in position to complete the spectral and optical power tests of the laser. The optical attenuator 15 can adjust the incident light intensity as needed, protecting the photodetector 16 from damage by strong light and improving the accuracy of the test. The photodetector 16, as the core component, is responsible for converting optical signals into electrical signals, and its stability and accuracy directly determine the performance of the entire test system. The photodetector pressure plate 17 ensures the stability and reliability of the photodetector 16 during installation. The spectrometer fiber optic connector 18 allows the test system to connect to external devices such as spectrometers, further expanding the test functions.
[0024] Furthermore, the test fixture box is composed of a base plate 21 and a shell 22 that are interlocked with each other. The top of the shell 22 is provided with the 6-position piano key switch, the voltage display meter 1, the current display meter 2 and the power display meter 3.
[0025] In this embodiment, by designing the test fixture box as a structure in which the base plate 21 and the outer shell 22 are interlocked, the assembly and disassembly of the entire test fixture box becomes more convenient, and it also facilitates the maintenance and replacement of the internal electronic components, thereby improving the maintainability and ease of use of the equipment.
[0026] Furthermore, a power board 23 is also provided inside the test fixture box, and a power interface 24 is provided on the power board 23. The power interface 24 is located on the side of the test fixture box, and a power switch 25 is provided in the test fixture box, which is located on the side of the test fixture box where the power interface 24 is located.
[0027] In this embodiment, by providing the power board 23 inside the test fixture housing and providing the power interface 24 and the power switch 25 to the power board 23, the test fixture can be easily connected to a power source for operation. At the same time, the power switch 25 also facilitates the user's operation of turning the device on and off, thus improving the ease of use of the device.
[0028] Furthermore, the 6-position piano key switch consists of 6 constant current driving current setting potentiometers 26 and 6 piano key switch bodies 27. The 6 constant current driving current setting potentiometers 26 are evenly arranged inside the test fixture box. Each constant current driving current setting potentiometer 26 has a piano key switch body 27 at its top. The piano key switch body 27 extends to the outside of the top of the test fixture box. The outside of the test fixture box is also provided with 6 driving current adjustment holes 28, each driving current adjustment hole 28 corresponding to one of the constant current driving current setting potentiometers 26.
[0029] In this embodiment, the design of the 6-position piano key switch allows users to select different drive currents for testing as needed, improving the flexibility and accuracy of the test. At the same time, the setting of the drive current adjustment hole 28 also facilitates users to finely adjust the drive current, thereby meeting different test requirements.
[0030] Furthermore, the top of the test fixture box is provided with a dual-wavelength correction potentiometer adjustment hole 29, which corresponds to the wavelength correction potentiometer 9.
[0031] In this embodiment, the dual-wavelength correction potentiometer adjustment hole 29 allows the user to easily adjust the wavelength correction potentiometer 9, thereby achieving accurate correction of the test wavelength and improving the accuracy and reliability of the test.
[0032] Furthermore, a semiconductor cooling chip is also provided inside the test fixture housing.
[0033] In this embodiment, as shown in Figure 3, the characteristics of a semiconductor cooler—cooling with forward current and heating with reverse current—are utilized. Combined with a temperature control circuit that can provide forward and reverse control current, it becomes possible to quickly and accurately maintain the temperature of the laser under test. This improves the efficiency of the testing process and the accuracy of the performance test. Furthermore, since laser diodes are electrostatic sensitive devices, multiple laser diode protection circuits are set in the driving circuit to prevent damage to the device under test during the testing process.
[0034] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. A visible light laser sorting and testing fixture, characterized in that, The test fixture includes a test fixture housing, an optical power detection component, and a 6-position key switch. The top of the test fixture housing is equipped with the optical power detection component and the 6-position key switch. The top of the test fixture housing also includes a voltage display, a current display, and a power display. The optical power detection unit includes a circuit board, a common socket, a test start switch, a toggle switch, a socket fixing component, a wavelength correction potentiometer, a pure copper heat sink, two sliding seats, and the optical power detection component. The circuit board is installed inside the test fixture housing. The upper surface of the circuit board is equipped with the common socket, the test start switch, the toggle switch, and the wavelength correction potentiometer. The operating terminals of the switches all extend to the top of the test fixture box. The upper surface of the circuit board is also provided with the socket fixing component, which is located outside the common socket. The top of the socket fixing component is provided with the pure copper heat sink, which is located on the upper surface of the test fixture box. The top of the common socket extends to the top of the pure copper heat sink. Sliding seats are provided on both sides of the upper surface of the pure copper heat sink. The optical power detection component is slidably installed between the two sliding seats through a sliding positioning shaft. The common socket is used to fix the packaged laser to be tested. The test terminal of the optical power detection component corresponds to the packaged laser to be tested.
2. The visible light laser sorting and testing fixture as described in claim 1, characterized in that, The optical power detection component includes a fixed bracket, an optical attenuator, a photodetector, a photodetector pressure plate, and a spectrometer fiber optic connector. The fixed bracket has sliding positioning shafts on both sides. The fixed bracket has the optical attenuator, the photodetector, the photodetector pressure plate, and the spectrometer fiber optic connector arranged sequentially from bottom to top inside. The fixed bracket has a spectral test light passage and an optical power test light passage on the side facing the pure copper heat sink.
3. The visible light laser sorting and testing fixture as described in claim 2, characterized in that, The test fixture box is composed of a base plate and an outer shell that are interlocked with each other. The top of the outer shell is equipped with the 6-position piano key switch, the voltage display meter, the current display meter and the power display meter.
4. The visible light laser sorting and testing fixture as described in claim 3, characterized in that, The test fixture box also has a power board inside, and the power board has a power interface located on the side of the test fixture box. The test fixture box also has a power switch located on the side of the test fixture box where the power interface is located.
5. The visible light laser sorting and testing fixture as described in claim 4, characterized in that, The 6-position piano key switch consists of 6 constant current driving current setting potentiometers and 6 piano key switch bodies. The 6 constant current driving current setting potentiometers are evenly arranged inside the test fixture box. The top of each constant current driving current setting potentiometer is provided with the piano key switch body, which extends to the outside of the top of the test fixture box. The outside of the test fixture box is also provided with 6 driving current adjustment holes, each driving current adjustment hole corresponding to one of the constant current driving current setting potentiometers.
6. The visible light laser sorting and testing fixture as described in claim 5, characterized in that, The top of the test fixture box is also provided with a dual-wavelength correction potentiometer adjustment hole, which corresponds to the wavelength correction potentiometer.