Edge-emitting laser cavity surface detection jig

Abstract

An edge-emitting laser cavity surface detection jig is characterized by comprising a reflector fixed on a tray so as to enable reflected light of an edge-emitting laser on the tray to be emitted after the angle of the reflected light is changed; and the microscope is fixed on an emergent light path of the reflecting mirror and is used for carrying out appearance detection. According to the utility model, the reflecting prism can be used for detecting the appearance of the cavity surface of the edge-emitting laser in the loading tray, so that the pollution or damage risk caused in the process of taking and placing the laser in the traditional detection mode is overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to edge emitting laser cavity surface detection technical field, specifically, an edge emitting laser cavity surface detection fixture. BACKGROUND

[0002] Edge emitting laser is often used in 3D vision, laser cutting, medical field due to high power density.

[0003] Due to the characteristics of edge emitting laser, the active region is located at the side, which is easy to be contaminated and inconvenient to detect in the production process.

[0004] Common detection methods include:

[0005] (1) fixed by using a clamp, make the laser stand up, detect the cavity surface through the microscope above.

[0006] (2) use prism reflection, detect the cavity surface through the microscope above.

[0007] (3) use horizontal microscope, directly detect the cavity surface.

[0008] These detection methods need to clamp the laser, which will damage the chip to some extent, the detection fixture of the utility model can realize the detection of the laser in the loading tray, and avoid the loss caused by the taking and placing process.

[0009] The disclosure of the above background art content is only used to assist in understanding the inventive concept and technical scheme of the utility model, which does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. UTILITY MODEL CONTENT

[0010] Therefore, the utility model provides an edge emitting laser cavity surface detection fixture, which can use a reflecting prism to detect the appearance of the edge emitting laser cavity surface in the loading tray, and overcome the pollution or damage risk caused by the taking and placing process of the traditional detection method.

[0011] The utility model provides a kind of edge emitting laser cavity surface detection fixture, it is characterized by comprising:

[0012] Reflecting mirror is fixed on tray, so that the reflected light of edge emitting laser located on the tray changes angle and emits;

[0013] Microscope is fixed on the emergent light path of reflecting mirror, and is used for appearance detection.

[0014] Optionally, the edge emitting laser cavity surface detection jig, wherein the reflector is a right-angle prism.

[0015] Optionally, the edge emitting laser cavity surface detection jig, wherein an angle between the hypotenuse of the right-angle prism and reflected light of the edge emitting laser is 45 degrees.

[0016] Optionally, the edge emitting laser cavity surface detection jig, further comprising:

[0017] a camera located on an outgoing light path of the microscope, configured to image a cavity surface of the edge emitting laser and obtain a test image.

[0018] Optionally, the edge emitting laser cavity surface detection jig, further comprising:

[0019] a controller configured to compare the test image with a standard image and obtain a detection result.

[0020] Optionally, the edge emitting laser cavity surface detection jig, further comprising:

[0021] a floodlight configured to irradiate the cavity surface of the edge emitting laser, so as to improve imaging quality and consistency of the camera.

[0022] Optionally, the edge emitting laser cavity surface detection jig, wherein the tray is provided with a positioning structure configured to fix the edge emitting laser and make an outgoing light direction of the edge emitting laser form an angle of 42-48 degrees with an optical axis of the reflector.

[0023] Optionally, the edge emitting laser cavity surface detection jig, wherein the positioning structure comprises an adjustable clamp capable of adapting to edge emitting laser package structures of different sizes.

[0024] Optionally, the edge emitting laser cavity surface detection jig, further comprising a support base, wherein the microscope is fixed on the outgoing light path of the reflector through the support base, and the support base is height-adjustable so as to adjust an observation height of the microscope.

[0025] Optionally, the edge emitting laser cavity surface detection jig, wherein a surface of the tray is provided with a laser energy absorption coating configured to prevent stray light reflection interference.

[0026] Compared with the prior art, the edge emitting laser cavity surface detection jig has the following beneficial effects:

[0027] The utility model discloses a mirror is utilized, to the appearance detection of the edge emission laser cavity surface in loading tray, in the detection process, need not to take and place laser COS from loading tray, reduce the damage risk, overcome the pollution or breakage risk caused in the process of needing to take and place laser of traditional detection mode, and simplify the detection procedure, improve the detection efficiency.

[0028] The utility model discloses only by tray, mirror and microscope constitute, and the component is less, and the whole structure is simple and clear. This simple architecture makes the assembly and debugging process of jig relatively easy, does not need complex installation procedure, can effectively reduce the construction cost and time cost, has the remarkable advantage for the quick use.

[0029] The mirror of the utility model is fixed on the tray, and the reflection light angle of the edge emission laser can be changed skillfully. This design can guide the light emitted by the laser to the microscope, so that the cavity surface parts that are difficult to directly observe can be detected, the detection range is greatly widened, the details of the laser cavity surface can be clearly captured by the microscope, and the appearance detection task can be completed comprehensively and accurately.

[0030] The utility model discloses the appearance detection with the aid of microscope, can directly present the actual condition of the cavity surface of edge emission laser. The powerful magnification function of microscope can clearly show the tiny flaw, defect and surface flatness of cavity surface, and provide accurate and intuitive detection result for technical personnel, which is helpful for quickly judging the quality of laser cavity surface.

[0031] The mirror and the microscope of the utility model are in reasonable light path position, and the tray is used for bearing the laser. This layout is compact and efficient. The compact layout not only saves space, but also ensures the stability of light transmission, reduces the loss and interference of light in the transmission process, and further improves the accuracy and reliability of the detection result. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained without paying the creative labor according to the provided drawings. Other features, objects and advantages of the utility model will become more obvious through reading the following detailed description of non-restrictive embodiments with reference to the drawings:

[0033] Figure 1 It is the structure schematic drawing of the edge emission laser cavity surface detection jig in the embodiment of the utility model;

[0034] Figure 2The utility model discloses a structure schematic view of another edge emitting laser cavity surface detection fixture in the embodiment of the utility model.

[0035] 1-edge emitting laser;

[0036] 2-heat sink;

[0037] 3-mirror;

[0038] 4-microscope;

[0039] 5-tray;

[0040] 6-camera;

[0041] 7-floodlight; DETAILED DESCRIPTION

[0042] The utility model will be described in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of variations and improvements can be made. These all belong to the protection scope of the utility model.

[0043] The terms "first", "second", "third", "fourth" and the like in the description and claims of the utility model and the above-mentioned drawings (if exist) are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein, for example, can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] The utility model embodiment provides a kind of edge emitting laser cavity surface detection fixture, to solve the problems in prior art.

[0045] The technical scheme of the utility model and how the technical scheme of the present application solves the above technical problems will be described in detail below with specific embodiments. The following several specific embodiments can be combined, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the utility model will be described below with reference to the drawings.

[0046] As Figure 1 And Figure 2As shown, the edge emitting laser cavity surface detection jig in the embodiment of the utility model includes:

[0047] The mirror 3 is fixed on the tray 5 to make the reflected light of the edge emitting laser 1 on the tray change angle and then exit;

[0048] The microscope 4 is fixed on the exit light path of the mirror for appearance detection.

[0049] Specifically, the mirror is usually made of high-reflectivity optical material, such as glass substrate coated with dielectric film or metal film (such as silver, aluminum, etc.). The mirror surface is polished with high precision to ensure low scattering and high reflection efficiency when reflecting light. The mirror is stably installed on a specific support, which is further fixed on the tray to ensure that the mirror does not displace during detection.

[0050] The core function of the mirror is to change the propagation angle of the reflected light of the edge emitting laser. When detecting the cavity surface of the edge emitting laser, the light passes through the mirror, so that the cavity surface of the edge emitting laser can be observed from above, without the need to change the angle of the edge emitting laser or place the microscope at the same level as the edge emitting laser, making the detection more flexible and easy to operate.

[0051] The mirror is a key conversion component of the entire detection jig light path system. It guides the reflected light of the edge emitting laser to the microscope, so that the cavity surface reflection light that cannot be directly observed by the microscope can be captured, providing the possibility for subsequent appearance detection, and is an important bridge for realizing the detection of the cavity surface of the edge emitting laser.

[0052] The edge emitting laser 1 is fixed on the heat sink 2. The heat sink 2 is fixed on the tray 5. Of course, the heat sink can not be used, and the edge emitting laser 1 can be directly fixed on the tray 5.

[0053] The microscope 4 is composed of multiple parts. The optical part includes eyepiece, objective lens, lens barrel, etc. The eyepiece is used for the observer to directly observe the image, the objective lens is responsible for magnifying the image of the sample, and the lens barrel connects the eyepiece and the objective lens to ensure the transmission of light. In this jig, the microscope is fixed on the exit light path of the mirror through a specific mounting bracket to ensure accurate docking of the light path.

[0054] The main function of the microscope is to magnify and observe the cavity surface reflection light of the edge emitting laser changed in angle by the mirror, thereby realizing the appearance detection of the cavity surface of the edge emitting laser. It can magnify the fine structure and defects of the cavity surface to a degree that can be clearly distinguished by the naked eye, providing detailed appearance information for the detector.

[0055] Light rays exiting the mirror enter the microscope's objective lens, which first magnifies the cavity surface image carried by the light rays, forming an inverted real image. This real image is then transmitted through the microscope tube to the eyepiece, where it is magnified a second time. Finally, the observer sees the cavity surface image, which has undergone two magnifications, through the eyepiece. The illumination system illuminates the sample from below or the side, allowing the details of the cavity surface to be observed more clearly.

[0056] The microscope is the core inspection component of the edge-emitting laser cavity surface inspection fixture. Through its magnification function, inspectors can directly observe the condition of the cavity surface, such as whether there are scratches, damage, or impurities, providing a direct basis for evaluating the quality and performance of the edge-emitting laser.

[0057] In some embodiments, such as Figure 2 As shown, the reflector is a right-angle prism. Right-angle prisms are typically made of high-quality optical glass and have two mutually perpendicular reflecting surfaces, forming a shape resembling a right angle. When the right-angle prism is an internal reflector, as... Figure 2 As shown, one reflecting surface is used for light incident, one reflecting surface is used for light exit, and the third surface is a reflective surface. When the right-angle prism is an external reflector, only one surface is needed for reflection, and the other two surfaces do not require light processing. The right-angle prism is precisely fixed in a specific bracket on the tray, which ensures that the right-angle prism maintains a stable position and angle during the testing process, without wobbling or displacement. The manufacturing process of this prism requires extremely high precision; its surface undergoes meticulous grinding and polishing to ensure high accuracy and low loss of light during reflection.

[0058] As a key component of the edge-emitting laser cavity surface inspection fixture, the main function of the right-angle prism is to change the propagation direction of the reflected light emitted by the edge-emitting laser. Utilizing the principle of total internal reflection, it redirects light rays that originally emitted in a specific direction by 90 degrees (or other specific angles, depending on the prism's configuration) through reflection, allowing the light to accurately enter the microscope's inspection optical path and providing suitable lighting conditions for subsequent appearance inspection.

[0059] When light emitted from a side-emitting laser is incident on a reflecting surface of a right-angle prism, total internal reflection occurs at the reflecting surface because the angle of incidence satisfies the condition (light travels from an optically denser medium to an optically less dense medium, and the angle of incidence is greater than the critical angle). This changes the direction of propagation, and the light eventually exits from the exit surface. Total internal reflection ensures that there is almost no energy loss during the reflection process, thus guaranteeing the intensity and quality of the light in the detection optical path.

[0060] The right-angle prism plays an important role in the entire detection fixture, which converts and optimizes the light path. It accurately guides the light from the edge-emitting laser to the microscope, enabling the microscope to receive clear and stable cavity reflection light signals. Compared with ordinary mirrors, the total reflection characteristics of the right-angle prism can provide higher reflection efficiency and more stable light path, reducing the scattering and loss of light during reflection, thereby improving the accuracy and reliability of the edge-emitting laser cavity detection. At the same time, the stable structure of the right-angle prism ensures the stability and consistency of the light path during long-term detection, providing a strong guarantee for the accuracy of the detection results.

[0061] In some embodiments, the angle between the hypotenuse of the right-angle prism and the reflected light of the edge-emitting laser is 45 degrees. Based on the law of total reflection of light, when light is emitted from a light-dense medium (glass material of the right-angle prism) to a light-lean medium (external air), and the incident angle is greater than the critical angle, total reflection occurs. In this detection fixture, the angle between the hypotenuse of the right-angle prism and the reflected light of the edge-emitting laser is specifically set to 45 degrees to ensure that the light is incident on the prism hypotenuse at an angle greater than the critical angle. In this way, the light is totally reflected on the reflecting surface inside the prism, and finally the direction of light propagation is changed by 90 degrees. For example, if the reflected light of the edge-emitting laser propagates horizontally, after the action of the right-angle prism with a 45-degree angle, it will be vertically upward, meeting the needs of the microscope vertical detection light path.

[0062] The precise setting of the 45-degree angle makes the light propagation path highly predictable and stable. The reflected light of the edge-emitting laser can accurately enter the right-angle prism and propagate along the established total reflection path, and finally accurately exit into the detection light path of the microscope. This avoids problems such as scattering, deviation, or failure to enter the microscope caused by angle deviation, ensuring the integrity and accuracy of the detection light path, and laying a solid foundation for the subsequent stable reception and imaging of the microscope on the cavity reflection light of the edge-emitting laser.

[0063] This angle setting is conducive to efficient transmission of light within the right-angle prism. Since the light energy loss is minimal during total reflection, the 45-degree angle ensures that the light can fully utilize the total reflection characteristics of the prism to maximize the transfer of reflected light energy from the edge-emitting laser to the microscope. Compared with other angle settings, this approach can ensure that the light intensity received by the microscope is sufficient, allowing the detection personnel to clearly observe the fine structure and potential defects of the edge-emitting laser cavity, improving the accuracy and reliability of the detection, which is crucial for accurately evaluating the quality and performance of the edge-emitting laser.

[0064] In some embodiments, the edge-emitting laser cavity detection fixture further comprises:

[0065] A camera 6 is located on the exit light path of the microscope to image the cavity surface of the edge emitting laser and obtain a test image.

[0066] The camera is precisely positioned on the exit light path of the microscope, and its core function is to image the reflected light from the edge emitting laser cavity surface after magnification by the microscope. By capturing this light information, the state of the edge emitting laser cavity surface is converted into a visual test image. These images contain rich details of the cavity surface, such as the presence of minor scratches, impurities, structural defects, etc., providing an intuitive and critical data basis for subsequent detection and analysis. Detection personnel can quickly and accurately judge the quality of the edge emitting laser cavity surface based on these test images.

[0067] The light exiting from the microscope carries the optical information of the edge emitting laser cavity surface after magnification. The image sensor inside the camera (such as the common CMOS or CCD sensor) can perceive the intensity and color information of these light rays. When the light shines on the pixel array of the image sensor, each pixel will generate a corresponding electrical signal or charge accumulation according to the received light intensity. These electrical signals undergo a series of processing steps, including amplification, analog-to-digital conversion, etc., and are finally converted into digital image data. The image processing chip inside the camera will further optimize and encode these digital image data, converting them into image formats convenient for storage and transmission, such as JPEG, PNG, etc., thus forming test images that can be observed and analyzed.

[0068] The introduction of the camera in the edge emitting laser cavity surface detection fixture greatly improves the convenience and accuracy of detection. On the one hand, compared with simply relying on the human eye to observe through the microscope, the camera can capture more abundant and subtle cavity surface information, avoiding detection omissions caused by human visual fatigue or subjective judgment differences. On the other hand, the generated test images can be easily stored, transmitted, and analyzed later. For example, when detecting batches of edge emitting lasers, test images from different batches or different times can be compared to more clearly observe the trend of cavity surface state changes, providing strong support for long-term monitoring of product quality and process optimization. In addition, image data obtained by the camera can also be combined with automated detection software to achieve intelligent defect recognition and analysis, further improving detection efficiency and accuracy.

[0069] In some embodiments, the edge emitting laser cavity surface detection fixture further comprises:

[0070] A controller for comparing the test image with a standard image to obtain a detection result.

[0071] The controller, as the "intelligent brain" of the entire detection fixture, its main function is to compare the camera-acquired edge-emitting laser cavity surface test image with the pre-stored standard image comprehensively. The standard image usually represents the optical image of the edge-emitting laser cavity surface in the ideal state, covering various characteristics such as the structure, flatness, and smoothness of the cavity surface. Through this comparison, the controller can quickly and accurately identify any abnormal conditions in the test image, and then generate a detection result, providing a key basis for determining whether the edge-emitting laser is of qualified quality.

[0072] When the camera completes the imaging of the edge-emitting laser cavity surface and transmits the test image to the controller, the controller will immediately start the image comparison program. First, it will use advanced image recognition algorithms to extract and match key feature points in the test image and the standard image. These feature points may include the edge profile of the cavity surface, the position and shape of specific structures, etc. Then, the controller will analyze the differences between the test image and the standard image pixel by pixel, such as subtle changes in brightness, color, texture, etc. Through quantitative evaluation of these differences, the controller can determine whether there are defects in the test image and the type, location, and severity of the defects. Finally, according to the preset judgment rules, the controller will generate corresponding detection results, such as "qualified", "minor defects", "serious defects", etc., and present the results to the operator in an intuitive way, such as displaying on the display screen or prompting through the indicator light.

[0073] The introduction of the controller for image comparison greatly improves the efficiency and accuracy of edge-emitting laser cavity surface detection. Compared with manual image comparison, the controller can complete complex comparison analysis in a very short time, greatly shortening the detection period, especially suitable for rapid detection needs on large-scale production lines. At the same time, since it makes judgments based on precise algorithms and preset rules, it avoids subjective errors caused by human factors, ensuring the consistency and reliability of the detection results. In addition, the controller can also record and statistically analyze the detection data, and through the long-term accumulation of data, it can help manufacturers deeply understand the fluctuation of product quality, providing valuable data support for optimizing production processes and improving product design, thereby continuously improving the overall quality and performance of edge-emitting lasers.

[0074] In some embodiments, the edge-emitting laser cavity surface detection fixture further comprises:

[0075] A floodlight 7 is used to illuminate the cavity surface of the edge-emitting laser to improve the imaging quality and consistency of the camera.

[0076] Floodlights play a crucial role in the edge-emitting laser cavity surface detection jig. Their core function is to provide uniform, stable, and appropriately intense light to the cavity surface of the edge-emitting laser. Through sufficient illumination, the quality and consistency of the camera's imaging of the edge-emitting laser cavity surface can be effectively improved. This is crucial for the subsequent controller to accurately compare test images with standard images and accurately determine the quality of the cavity surface. Clear and consistent imaging allows the camera to capture more subtle structures and potential defects of the cavity surface, laying a good foundation for the detection process.

[0077] Floodlights typically use special optical designs and light-emitting elements, such as LED arrays. These light-emitting elements are carefully arranged and calibrated to ensure that the emitted light is uniformly distributed over a large area. When illuminating the edge-emitting laser cavity surface, the light emitted by the floodlight is projected onto the cavity surface in the form of nearly parallel light, reducing the phenomenon of shadows and bright spots caused by uneven light. At the same time, the brightness of the floodlight can be adjusted by the controller to adapt to the reflection characteristics of different types of edge-emitting laser cavity surfaces and the light sensitivity of the camera, ensuring that the cavity surface is provided with ideal lighting conditions in various situations.

[0078] The role of improving imaging quality and consistency:

[0079] Improve imaging quality: uniform and appropriate intensity of light can clearly outline the profile and internal structure of the edge-emitting laser cavity surface. Defects such as small scratches and impurity particles on the cavity surface are more easily captured by the camera under good lighting, making the details in the image more rich and clear. For example, subtle scratches that are difficult to detect under insufficient or uneven lighting will be clearly displayed under the illumination of the floodlight, thereby improving the accuracy and reliability of detection.

[0080] Improve imaging consistency: Since the floodlight can ensure that the cavity surface receives the same lighting conditions every time, whether it is detected at different times or different edge-emitting lasers, the images obtained by the camera have high consistency in brightness, contrast, etc. This allows the controller to more accurately identify true differences when comparing test images with standard images, rather than misjudging due to fluctuations in lighting conditions. For example, in batch production detection, each edge-emitting laser cavity surface can be imaged under the same lighting, greatly improving the stability and repeatability of the detection results.

[0081] In some embodiments, the edge-emitting laser cavity surface detection jig includes a positioning structure on the tray for fixing the edge-emitting laser and forming an angle of 42°-48° between the light-emitting direction of the edge-emitting laser and the optical axis of the reflector.

[0082] The positioning structure on the tray is carefully designed to precisely fix the edge emitting laser. It is usually composed of special-shaped grooves, protrusions, and adjustable clamps. The shape of the grooves and protrusions matches the contour of the edge emitting laser, enabling preliminary positioning of the laser in the horizontal direction, preventing displacement on the tray. The adjustable clamps are installed on the edge of the tray, and their opening and closing degree is controlled by screws or other fine adjustment devices, further stabilizing the edge emitting laser in the vertical direction, ensuring that it remains stable during the detection process. In addition, the material of the positioning structure is selected to have certain elasticity and wear resistance, which can ensure the stable clamping of the laser and will not damage the surface of the laser.

[0083] The primary function of the positioning structure is to fix the edge emitting laser, keeping its position unchanged during the detection process. More importantly, it can accurately adjust the light direction of the edge emitting laser, forming a 42°-48° angle with the optical axis of the mirror. This angle range has been scientifically demonstrated, and within this range, the reflected light of the edge emitting laser can efficiently enter the detection light path of the microscope after being reflected by the mirror, ensuring the intensity of the light and the quality of the image. For example, when the angle is 45°, the reflection path of the light in the mirror is most ideal, which can minimize light loss and improve detection accuracy. At the same time, stable positioning ensures the consistency of the position and angle of the edge emitting laser during each detection, providing a stable and reliable prerequisite for subsequent camera imaging and controller comparison analysis.

[0084] The tray positioning structure works closely with the mirror, microscope, and other components. It accurately fixes the position and light direction of the edge emitting laser, providing stable and light path-compliant incident light for the mirror. The mirror reflects the light to the detection light path of the microscope according to the established angle relationship. The microscope then enlarges the reflected light from the edge emitting laser cavity surface under stable light conditions, and finally the camera captures the image and transmits it to the controller for analysis. If the positioning structure deviates, causing the edge emitting laser to deviate from the required angle with the mirror optical axis, the viewing angle of the microscope will deviate, or too much energy will be lost during reflection, affecting the camera imaging quality, ultimately leading to the controller being unable to accurately judge the quality of the edge emitting laser cavity surface.

[0085] In some embodiments, the edge emitting laser cavity surface detection jig includes an adjustable clamp that can adapt to different sizes of edge emitting laser package structures.

[0086] The adjustable clamp is mainly composed of multiple movable components. The clamp main frame is made of a metal material that is strong and has a certain flexibility, such as aluminum alloy, which not only ensures the structural strength, but also facilitates later adjustment. A plurality of slideable clamping arms are provided on the frame, one end of the clamping arm is connected to the frame through a precision guide rail, and can move flexibly along the guide rail to adapt to the width requirements of different sizes of edge emitting lasers. The clamping end of the clamping arm is installed with an elastic rubber pad, and the surface of the rubber pad has anti-slip texture, which not only effectively increases the friction force to prevent the edge emitting laser from sliding during detection, but also avoids scratching the surface of the laser package structure. In addition, in order to adapt to edge emitting lasers of different lengths, the clamp is also equipped with telescopic positioning support blocks, which can be adjusted in position on the clamp according to actual needs through threaded connection or clamping groove connection.

[0087] When different sizes of edge emitting lasers need to be fixed, first loosen the fastening screws on the clamping arms, so that the clamping arms can slide freely on the guide rail. According to the width of the laser, adjust the clamping arms to the appropriate position, then tighten the screws to fix the position of the clamping arms. For lasers of different lengths, adjust the position of the positioning support block by rotating or plugging, so that it accurately supports the end of the laser. In this process, the elastic rubber pad will automatically conform to the contour of the laser, further enhancing the stability of clamping. The whole adjustment process is simple and convenient, and can complete the adaptation and fixation of different sizes of edge emitting lasers in a short time.

[0088] The biggest advantage of the adjustable clamp is its excellent versatility. In the production process of edge emitting lasers, due to the needs of different models or different application scenarios, the packaging structure size of the laser has great differences. Traditional fixed size clamps are difficult to meet the diversified detection needs, while adjustable clamps can easily cope with such situations. Whether it is a small low-power edge emitting laser or a large high-power laser, accurate fixation can be achieved by adjusting the position of the clamping arm and the positioning support block. This greatly improves the application range of the detection fixture, reduces the time and cost waste caused by replacing different size clamps, and improves the production detection efficiency.

[0089] In the edge emitting laser cavity surface detection jig, the adjustable clamp as the key component of the positioning structure plays a crucial role in providing basic support. It ensures that edge emitting lasers of different sizes can be accurately fixed on the tray during detection, and makes the laser light direction form an angle of 42°-48° with the optical axis of the mirror. Only by ensuring the accuracy of the laser position and angle can the light be smoothly transmitted between the mirror, microscope, camera and other components, thereby ensuring the accuracy and reliability of the detection results. Without the adaptive function of the adjustable clamp, the detection jig may only be able to detect a single size of edge emitting laser, which cannot meet the diversified product detection needs in actual production.

[0090] In some embodiments, the edge emitting laser cavity surface detection jig further comprises a support seat, the microscope is fixed on the outgoing light path of the mirror through the support seat, and the height of the support seat is adjustable to adjust the observation height of the microscope.

[0091] The support seat is mainly composed of a base, a lifting column and a fixing frame. The base is made of heavy and stable metal materials such as cast iron, which can provide stable support when placing the microscope and prevent shaking from affecting the detection accuracy. The lifting column is located in the center of the base and is usually cylindrical with precise threads on its surface. The lifting column is connected to the base through threads, which allows the lifting column to move up and down by rotating. The fixing frame is installed at the top of the lifting column and is used to fix the microscope. The shape of the fixing frame is adapted to the profile of the bottom of the microscope, and the microscope is firmly fixed on the support seat by screws or buckles. To further enhance stability, the part of the fixing frame in contact with the microscope may also be equipped with rubber cushions, which can prevent the microscope from being damaged during fixing and also serve as a certain shock absorption function.

[0092] When the observation height of the microscope needs to be adjusted, the operator rotates the lifting column to achieve this. Due to the thread cooperation between the lifting column and the base, rotating the lifting column will make it move upwards or downwards along the thread direction. With the movement of the lifting column, the fixing frame fixed at its top and the microscope will also rise or fall synchronously. After adjusting to the appropriate height, the operator can fix the lifting column in the current position by tightening the locking nut on the lifting column (if equipped), to prevent it from shifting due to vibration and other reasons during detection.

[0093] The height-adjustable design of the support seat has significant advantages. During the edge-emitting laser cavity surface detection process, the installation height and the angle of the outgoing light of different types of edge-emitting lasers may differ. Through the height-adjustable support seat, the operator can flexibly adjust the observation height of the microscope, so that it can accurately receive the light reflected by the mirror. This not only improves the compatibility of the detection fixture for different types of edge-emitting lasers, but also ensures that the microscope can obtain clear and accurate cavity surface images in various situations. Compared with the fixed-height support structure, the adjustable support seat greatly enhances the versatility and adaptability of the detection fixture, reduces the need to replace the entire support structure due to equipment mismatch, and reduces production costs and operational complexity.

[0094] The support seat plays an indispensable role in the edge-emitting laser cavity surface detection fixture. As the mounting carrier of the microscope, its height adjustment function is directly related to the accuracy and stability of the entire detection light path. Only by accurately adjusting the observation height of the microscope can we ensure that the light reflected by the mirror can smoothly enter the detection light path of the microscope, thereby providing the camera with high-quality cavity surface images, and ultimately ensuring that the controller can accurately judge the quality of the edge-emitting laser cavity surface based on these images. If the height of the support seat cannot be adjusted or the adjustment precision is insufficient, it may cause the light to not enter the microscope correctly, resulting in blurred or no imaging, which seriously affects the reliability and accuracy of the detection results, and thus affects the production quality control of the edge-emitting laser.

[0095] In some embodiments, the tray surface is provided with a laser energy absorbing coating to prevent stray light reflection interference.

[0096] The laser energy absorbing coating is usually made of special light-absorbing materials, such as carbon nanotube composite materials, high molecular polymers doped with specific metal ions, etc. Carbon nanotubes can efficiently absorb laser energy due to their unique tubular structure and excellent light absorption performance. In practical applications, carbon nanotubes are uniformly dispersed in an adhesive to form a coatable slurry, which is then attached to the tray surface through spraying, brushing, or other processes. High molecular polymers doped with metal ions utilize the absorption characteristics of metal ions to specific wavelengths of laser light, combined with the good film-forming and adhesion properties of high molecular materials, to effectively absorb laser energy. These materials are carefully selected and proportioned to ensure that the coating can stably absorb stray light in different environments.

[0097] When the light shines on the edge-emitting laser, some stray light will be scattered around. Once these stray lights shine on the tray surface, if the tray is not specially treated, reflection will occur, and the reflected light may enter the light path of the microscope or camera, interfering with the normal detection imaging. The laser energy absorption coating on the tray surface can convert the incident stray light energy into other forms of energy, such as heat, by using the internal material's electronic transition, vibration and other microscopic mechanisms. For example, after absorbing photon energy, the electrons in the carbon nanotube will undergo transition, and the energy is dissipated in the form of heat during the transition process, thereby avoiding the reflection of stray light and ensuring that the detection light path is not disturbed.

[0098] This coating has many advantages. First, it has high absorption efficiency and can effectively absorb most of the stray light, greatly reducing the interference of stray light on detection imaging and improving the accuracy and reliability of detection. Second, the coating has good stability and can withstand certain temperature changes, humidity changes and mechanical friction, and will not fail after long-term use, ensuring the continuous and effective operation of the detection fixture in different working environments. Third, the thickness of the coating is relatively thin, generally in the micron level, which will not significantly affect the structure and other functions of the tray, and will not increase excessive cost.

[0099] In the edge-emitting laser cavity detection fixture, the laser energy absorption coating on the tray surface plays an important role. It is the key link to ensure the purity of the detection light path. By reducing the reflection of stray light, the microscope can receive clearer and more accurate edge-emitting laser cavity reflection light, thereby providing a high-quality imaging basis for the camera. High-quality imaging helps the controller more accurately compare the test image with the standard image to accurately determine whether there is a defect in the edge-emitting laser cavity, the type and severity of the defect. Without such a coating, the interference of stray light may cause imaging to appear abnormal phenomena such as light spots and stripes, making it difficult for the detection personnel to accurately judge the quality of the cavity, and even may lead to misjudgment, affecting the production quality control and product performance evaluation of the edge-emitting laser.

[0100] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0101] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and various modifications or changes can be made by those skilled in the art within the scope of the claims, which do not affect the essential content of the present application.

Claims

1. An edge-emitting laser facet inspection tool, comprising: The utility model relates to a kind of laser testing device, including: Reflecting mirror, fixed on tray, to make the reflected light of edge emitting laser located on the tray change angle and then exit; Microscope, fixed on the exit light path of the reflecting mirror, for appearance detection.

2. The edge-emitting laser cavity facet inspection tool of claim 1, wherein, The reflecting mirror is a right-angle prism.

3. The edge-emitting laser cavity facet inspection tool of claim 2, wherein, The angle between the hypotenuse of the right-angle prism and the reflected light of the edge emitting laser is 45 degrees.

4. The edge-emitting laser cavity surface inspection tool of claim 1, wherein, Also including: Camera, located on the exit light path of the microscope, for imaging the cavity surface of the edge emitting laser, and obtaining test image.

5. The edge-emitting laser cavity facet inspection tool of claim 4, wherein, Also including: Controller, for comparing the test image with standard image, and obtaining detection result.

6. The edge-emitting laser cavity surface inspection tool of claim 4, wherein, Also including: Floodlight, for irradiating the cavity surface of the edge emitting laser, to improve the imaging quality and consistency of the camera.

7. The edge-emitting laser cavity surface inspection tool of claim 1, wherein, The tray is provided with positioning structure, for fixing the edge emitting laser and making the light exit direction of the edge emitting laser form 42°-48° angle with the optical axis of the reflecting mirror.

8. The edge-emitting laser cavity surface inspection tool of claim 7, wherein, The positioning structure includes adjustable clamp, which can adapt to edge emitting laser package structure of different sizes.

9. The edge-emitting laser cavity surface inspection tool of claim 1, wherein, Also including support seat, the microscope is fixed on the exit light path of the reflecting mirror through the support seat, and the height of the support seat is adjustable, to adjust the observation height of the microscope.

10. The edge-emitting laser cavity surface inspection tool of claim 1, wherein, The surface of the tray is provided with laser energy absorption coating, for preventing stray light reflection interference.

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