Adjusting method and adjusting device for a collimated laser with one degree of freedom

Abstract

The application relates to the technical field of lasers, and discloses a collimation laser device adjusting method and device, which comprises the following steps: establishing a unified optical reference with the light parallel to the guide rail by using a remote light source and a first camera which can move along the guide rail; then performing serial alignment based on the reference: adjusting the laser device so that the light is perpendicular to the lens, installing a TO, and determining the angle by detecting whether the reflected light returns along the original path; and finally adjusting and fixing the posture of the optical fiber after the internal optical axis is calibrated. Through the above process improvement, the components of the optical path system can be checked, the complex process of traditional laser device adjustment is converted into a closed loop and ordered process based on a single reference, the dependence on the experience of operators is significantly reduced, and the device adjustment efficiency, precision and product consistency are improved.

Description

Technical Field

[0001] This invention relates to the field of laser assembly and adjustment technology, and in particular to an assembly and adjustment method and apparatus for a collimated laser with degrees of freedom that can be eliminated. Background Technology

[0002] The packaging and fiber coupling of lasers, especially semiconductor lasers, are core components in the manufacturing of high-precision optoelectronic devices. The assembly and adjustment process requires ensuring that the spatial and angular relationships between the laser chip, collimating lens, TO (transistor housing), and output fiber achieve micron- or sub-micron-level precision. Any minute deviation, especially angular deviation, can lead to a sharp decrease in optical coupling efficiency, or even complete failure. Traditional methods heavily rely on the operator's manual experience under a microscope, resulting in inherent bottlenecks such as low efficiency, poor consistency, and difficulty in achieving large-scale automated production.

[0003] To improve the objectivity and accuracy of angle alignment, existing technologies have proposed several detection methods based on optical principles. For example, patent CN1235014C discloses a method for aligning and calibrating a semiconductor laser. This method fixes a TO (Transformer Optical Transistor) housing with a sintered laser die, uses a collimated visible light laser to illuminate the cavity surface of the chip at a specific angle, and quantitatively calculates the angular deviation between the laser emission direction and the central axis of the TO housing by measuring the positional offset of the reflected light spot on a fixed ruler at a distance. This method transforms angle measurement from subjective microscopic observation into a calculable geometric relationship, improving alignment accuracy in specific scenarios.

[0004] However, the above-mentioned technical solutions have significant shortcomings. First, they use a static ruler as a single detection terminal, which cannot establish and verify the mechanical reference of the entire system in real time before assembly and adjustment, such as the straightness of the guide rail. This leads to a disconnect between mechanical errors and the optical alignment process, and the reference error cannot be sensed and compensated online. Second, this method only realizes the post-assessment of the chip angle and lacks a closed-loop feedback control mechanism that runs through the entire assembly and adjustment process. At the same time, this solution is an isolated detection step and is not integrated with the precise positioning and attitude adjustment of the fiber optic coupling mechanism, so it cannot form a coherent and efficient operation process from internal optical axis calibration to external fiber optic coupling. Therefore, there is an urgent need in the field for an integrated assembly and adjustment method that can systematically establish a unified reference, realize multi-degree-of-freedom serial alignment and real-time closed-loop detection, and ultimately achieve high-precision fiber optic coupling. Summary of the Invention

[0005] In view of this, the present invention proposes a collimation method and device for a collimated laser with degrees-of-freedom capability that can verify the mechanical reference of the assembly of related components and laser system and can be used throughout the entire assembly and adjustment process from TO to fiber, so as to solve the problems of existing solutions being unable to verify the overall mechanical reference of the system and lacking the correction of the entire assembly and adjustment process.

[0006] The technical solution of this invention is implemented as follows: On the one hand, the present invention provides a method for assembling and adjusting a collimated laser with degrees of freedom extinguishable, comprising the following steps: S1. Set up a guide rail, place a remote light source at one end of the guide rail, place a laser at the other end, place a first camera on the guide rail, set up an optical fiber assembly mechanism between the first camera and the laser, and place a second camera on one side of the guide rail. S2. Light is emitted to the first camera through the remote light source. Then the first camera is moved along the guide rail, and the remote light source is adjusted so that the light spot captured by the first camera always stays in the same position, ensuring that the guide rail is parallel to the light. S3. Adjust the attitude of the first camera to avoid the light path, and simultaneously place the beam splitter on the light path. The light passes through the beam splitter and is split and directed to the sensor of the fiber optic assembly mechanism to ensure accurate positioning between the fiber optic assembly mechanism, the guide rail and the first camera. S4. Adjust the posture of the fiber optic assembly mechanism to avoid the optical path of the light. The light passes through the beam splitter and enters the laser. Adjust the posture of the laser to ensure that the light is perpendicular to the laser lens. S5. Install TO into the laser, adjust the position of TO so that the light is reflected along the original path. After the reflected light is split by the beam splitter, it enters the second camera for detection to ensure that the light is reflected along the original path. Then fix TO. S6. Turn off the remote light source, assemble the optical fiber onto the optical fiber assembly mechanism, and then adjust the attitude of the optical fiber relative to the laser end face and relative to its own circumference through the optical fiber assembly mechanism. After the adjustment is completed, fix the optical fiber to the laser.

[0007] Based on the above technical solutions, the preferred embodiment also includes the following steps: A guide rod is set up to connect the optical fiber assembly mechanism. A base is installed on the guide rail to carry the first camera. The base and the guide rod are slidably engaged. An optical fiber sensor is installed inside the guide rod. A sliding base is used to move the first camera toward the fiber optic assembly mechanism; After detecting the deformation of the guide rod through the fiber optic sensor, the straightness of the guide rail is adjusted by the adjusting component.

[0008] On the other hand, the present invention provides a method and apparatus for assembling and adjusting a collimated laser with degrees of freedom extinguishable, comprising a base plate, a guide rail, a base, a first camera, a laser, and an optical fiber assembly mechanism, wherein... The base plate is equipped with guide rails; The base slides into the guide rail; The first camera is mounted on the base; The laser is positioned on one side of the guide rail end; The fiber optic assembly mechanism is mounted on the guide rail and is located between the first camera and the laser.

[0009] Based on the above technical solutions, preferably, it also includes a guide rod, and the base includes a sliding part and a multi-degree-of-freedom adjustment seat, wherein... The sliding part slides into the guide rail; The multi-degree-of-freedom adjustment seat is mounted on the sliding part; One end of the guide rod is connected to the optical fiber assembly mechanism, and the other end is slidably engaged with the sliding part. An optical fiber sensor is also installed inside the guide rod.

[0010] Based on the above technical solutions, preferably, it also includes a beam splitter, and the first camera includes an adjustment rod, a camera, and a near-end light source, wherein... The adjusting rod is mounted on a multi-degree-of-freedom adjusting seat, and the movable end of the adjusting rod can rotate and rise and fall. The camera is mounted on the movable end of the adjusting rod; The near-end light source is located on the camera; The beam splitter is positioned on the near-end light source.

[0011] Based on the above technical solutions, preferably, the fiber optic assembly mechanism includes a base, a swing arm, a servo motor, and adjustment components, wherein... The base is located at the end of the guide rail and is connected to one end of the guide rod; The swing arm is rotatably connected to the base; The servo motor is mounted on the base, and the main shaft of the servo motor passes through the base and is fixedly connected to the swing arm. The main shaft of the servo motor rotates in coordination with the base. The calibration component is mounted on the swing arm and is used to adjust the attitude of the optical fiber.

[0012] Based on the above technical solutions, preferably, the fiber optic assembly mechanism further includes a connecting frame and clamping components, and the laser is provided with an end plate, a first pressure plate, an end frame, and a second pressure plate, wherein... The end plate is located at the end of the laser; The first pressure plate is located on the side of the end plate away from the laser; The end bracket is positioned on the side of the end plate furthest from the laser. The second pressure plate is set on the end frame; One end of the connecting bracket is connected to the base; The clamping element is located on the other end of the connecting frame, and the clamping element clamps the end plate and the end frame.

[0013] Based on the above technical solutions, preferably, the calibration components include a coarse and fine adjustment rotating platform, a push rod, a clamp, and a sensor, wherein, The coarse and fine adjustment rotating platform is set on the swing arm, and the swing axis of the swing arm intersects the guide rail on the projection plane; The push rod is mounted on the movable end of the coarse and fine adjustment rotating platform; The clamp is located on the movable end of the push rod, and the clamp has an opening. The sensor is mounted on the clamp.

[0014] Based on the above technical solutions, preferably, it also includes an adjusting component, which slides with the guide rail and is used to adjust the straightness of the guide rail.

[0015] Based on the above technical solutions, preferably, the adjusting component includes a positioning part, an adjusting part, a commutator, an adjusting motor, a fine-tuning rod, an elastic block, and a piezoelectric ceramic sheet. The guide rail has a bottom groove and a top groove. The positioning part slides into the bottom groove; The adjusting part and the positioning part are integrated into one structure. The adjusting part and the sliding part slide together with the top slide groove, and the adjusting part is provided with a receiving groove. The commutator is housed within the receiving slot; The regulating motor is connected to the commutator, and the main shaft of the regulating motor is connected to the input end of the commutator; One end of the fine-tuning lever is connected to the output terminal of the commutator; One side of the elastic block abuts against the fine-tuning rod; One side of the piezoelectric ceramic sheet abuts against the elastic block away from the fine-tuning rod, while the other side of the piezoelectric ceramic sheet abuts against the inner wall of the receiving groove.

[0016] The assembly and adjustment method and apparatus for a collimated laser with degrees of freedom extinguishable according to the present invention have the following advantages over the prior art: (1) This method first establishes and calibrates a linear reference for the guide rail using a remote light source and a first camera, providing a unified optical reference system for all subsequent assembly and adjustment steps. Then, based on this reference, the perpendicularity of the lens and the angle of TO are sequentially tested and adjusted in a series, closed-loop manner. This integrates multiple degrees of freedom that traditionally require independent and repeated adjustments into an orderly process, significantly simplifying the operation and reducing reliance on personnel experience. Finally, after the internal optical axis is accurately determined, the attitude of the optical fiber is adjusted and fixed, ensuring efficient coupling between the laser and the optical fiber. This method effectively improves the assembly and adjustment efficiency, accuracy, and consistency of the laser.

[0017] (2) This method first uses external light calibration to establish an absolute straight reference for the guide rail and ensures that it is perpendicular to the lens mounting surface, thereby eliminating the need for lens adjustment. Subsequently, when installing the TO, it is only necessary to check whether its reflected light strictly returns along the original path of this reference light to lock its correct angle in one go, avoiding a complicated adjustment process. This design fundamentally simplifies the operation, reduces the dependence on skilled workers, and transforms subjective and error-prone manual adjustment of multiple degrees of freedom into objective and repeatable procedural steps, which can effectively improve the efficiency and quality of assembly and adjustment.

[0018] (3) In the structure of the assembly and adjustment device of the present invention, a base plate is provided as the installation foundation, and the beam splitter is integrated with the first camera. A near-end light source is provided on the first camera. In this way, after the calibration is completed by the far-end light source in conjunction with the camera, the beam splitter can be switched directly, which provides a convenient operation for subsequent calibration of the laser and is conducive to improving calibration efficiency. At the same time, a near-end light source is provided on the first camera, so the position of the laser can be selectively corrected by using either the far-end light source or the near-end light source, so as to realize the laser optical axis verification at different distances.

[0019] (4) In the structure of the optical fiber assembly mechanism, it is connected to the guide rail through the base, and the swing arm and the adjustment component can be driven by the servo motor to swing relative to the base. In this way, when the optical axis is calibrated, the swing arm and the adjustment component can avoid the optical path to prevent interference problems. After the laser is calibrated, the adjustment component can be reset so that the optical fiber can be assembled through the adjustment component, which effectively improves the assembly convenience of the optical fiber.

[0020] (5) In the structure of the calibration component, a coarse and fine adjustment rotating platform and a push rod are provided to adjust the position of the clamp, which facilitates the clamping, adjustment and assembly of the optical fiber. At the same time, a sensor is integrated on the clamp, which can work with the remote light source and beam splitter to achieve coaxial calibration of the remote light source, beam splitter and optical fiber assembly structure. The coarse and fine adjustment rotating platform and push rod can selectively adjust the position of the sensor so that the sensor is aligned with the optical path or the clamp is aligned with the optical fiber, which effectively improves the convenience of application.

[0021] (6) By setting a guide rod on the optical fiber assembly mechanism and sliding the guide rod with the base on which the first camera is installed, and setting an optical fiber sensor inside the guide rod, if there is a deviation in the shape of the guide rail when the first camera moves along the guide rail through the base, the error can be transmitted to the guide rod and then detected by the optical fiber sensor. Then the shape of the guide rail can be finely adjusted by the adjusting component. This helps to ensure the straightness of the guide rail and ensure that the guide rail is parallel to the optical axis of the far-end light source. In the structure of the adjusting component, the adjusting motor can drive the fine-tuning rod to move through the commutator to push the guide rail for shape adjustment. The cooperation between the piezoelectric ceramic sheet and the elastic block can adjust the offset of the fine-tuning rod, thereby achieving precise adjustment of the shape of the guide rail. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart illustrating the assembly and adjustment method for a collimated laser with extinguishable degrees of freedom according to the present invention. Figure 2 This is a perspective view of the assembly and adjustment device of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 For the present invention Figure 2 Enlarged view of the structure at point B; Figure 5 This is an exploded view of the assembly and adjustment device of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of the structure at point C; Figure 7 This is a perspective view of the laser and fiber optic assembly mechanism of the assembly and adjustment device of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the structure at point D; Figure 9 The optical fiber calibration process clamp state of the assembly and adjustment device of the present invention. Figure 1 ; Figure 10 The optical fiber calibration process clamp state of the assembly and adjustment device of the present invention. Figure 2 ; Figure 11 This is a perspective view of the fiber optic assembly mechanism of the assembly and adjustment device of the present invention; Figure 12 This is a perspective view of the adjusting member of the assembly and adjustment device of the present invention; Figure 13 This is a perspective view of the internal structure of the laser in the assembly and adjustment device of the present invention; Figure 14 This is a side view of the assembly and adjustment device of the present invention; Figure 15 This is a structural diagram of the optical fiber in the assembly and adjustment device of the present invention; Figure 16 This is an optical path diagram of the incident beam splitter at the far end of the assembly and adjustment device of the present invention; Figure 17This is an optical path diagram of the TO reflected light from the assembly and adjustment device of the present invention entering the beam splitter; In the diagram: 1. Base plate; 2. Guide rail; 201. Bottom slide groove; 202. Top slide groove; 3. Base; 31. Sliding part; 32. Multi-degree-of-freedom adjustment seat; 4. First camera; 41. Adjusting rod; 42. Camera; 43. Near-end light source; 5. Laser; 51. End plate; 52. First pressure plate; 53. End frame; 54. Second pressure plate; 6. Fiber optic assembly mechanism; 61. Base; 62. Swing arm; 63. Servo motor; 64. Adjustment component; 641. Coarse and fine adjustment rotating platform; 642. Push rod; 643. Clamp; 644. Sensor; 65. Connecting frame; 66. Clamping component; 601. Opening; 7. Guide rod; 8. Beam splitter; 9. Adjusting component; 91. Positioning part; 92. Adjusting part; 93. Commutator; 94. Adjusting motor; 95. Fine adjustment rod; 96. Elastic block; 97. Piezoelectric ceramic sheet; 901. Receiving groove; 10. TO; 11. Optical fiber; 12. Second camera. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 the present invention, and should not be construed as limiting the present invention.

[0029] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0030] like Figure 1 As shown, the collimation method for eliminating degrees of freedom of the present invention includes the following steps: S1. Set up a guide rail, place a remote light source at one end of the guide rail, and a laser at the other end. Place a first camera on the guide rail, and set up a fiber optic assembly mechanism between the first camera and the laser. Place a second camera on one side of the guide rail. S2. Emit light from the remote light source to the first camera. Then move the first camera along the guide rail and adjust the remote light source to ensure that the light spot captured by the first camera remains in the same position, ensuring that the guide rail is parallel to the light source. S3. Adjust the orientation of the first camera to avoid the light path, and simultaneously position the beam splitter on the light path. The light passes through the beam splitter and is split towards the sensor of the fiber optic assembly mechanism, ensuring that the fiber optic assembly mechanism, the guide rail, and the laser are aligned. S4. Adjust the position of the fiber optic assembly mechanism to avoid the light path. The light passes through the beam splitter and enters the laser. Adjust the laser's position to ensure that the light is perpendicular to the laser lens. S5. Install the TO into the laser and adjust its position so that the light is reflected along the original path. The reflected light is split by the beam splitter and enters the second camera for detection. Ensure that the light is reflected along the original path, and then fix the TO. S6. Turn off the remote light source and assemble the fiber optic cable onto the fiber optic assembly mechanism. Then, adjust the fiber optic cable's position relative to the laser end face and relative to its own circumference through the fiber optic assembly mechanism. After adjustment, fix the fiber optic cable to the laser.

[0031] As described above, in the assembly and adjustment method of the present invention, a remote light source is used in conjunction with a camera to capture light, and the camera is moved synchronously on the guide rail to ensure that the camera captures light at a uniform position. That is, the remote light source and the first camera are used to establish and calibrate a straight line reference for the guide rail, providing a unified reference system for all subsequent assembly and adjustment steps.

[0032] Furthermore, based on this benchmark, the perpendicularity of the lens and the angle of TO are sequentially tested and adjusted in a series and closed loop. This integrates multiple degrees of freedom that traditionally require independent and repeated adjustments into an orderly process, significantly simplifying the operation and reducing reliance on personnel experience.

[0033] Specifically, by aligning the light from the distant light source perpendicular to the lens of the laser, the laser's relative optical path is precisely aligned and adjusted. This simulates the laser's output path and calibrates the laser's internal optical axis.

[0034] Furthermore, after the optical axis inside the laser is precisely determined, the TO can be installed, allowing the TO to be assembled in one go. Subsequently, after the light is reflected by the TO, it can be split by the beam splitter and then detected by the preset second camera to ensure the coaxial return of the light. During the measurement, the beam splitter is fixed in the preset position relative to the guide rail to accurately cooperate with the second camera to achieve detection.

[0035] Finally, the fiber's attitude is adjusted and fixed to ensure efficient coupling between the laser and the fiber. Overall, this method improves assembly efficiency, accuracy, and consistency.

[0036] In this method, a remote light source provides an absolute linear reference for the camera, fiber optic assembly mechanism, laser lens, and TO (Transfer Object), eliminating the need for lens adjustment. Furthermore, when installing the TO, the correct angle can be locked in a single step simply by checking whether its reflected light strictly returns along this reference optical path, avoiding complex adjustment procedures. This design fundamentally simplifies operation, reduces reliance on skilled workers, and transforms subjective, error-prone, multi-degree-of-freedom manual adjustments into objective, repeatable, and streamlined processes, effectively improving assembly efficiency and quality.

[0037] The assembly and adjustment method of the present invention further includes the following steps: A guide rod is set up to connect to the fiber optic assembly mechanism. A base is installed on the guide rail to mount the first camera, and the base and guide rod are slidably engaged. A fiber optic sensor is installed inside the guide rod. The base is slidable to move the first camera toward the fiber optic assembly mechanism. After the fiber optic sensor detects the deformation of the guide rod, the straightness of the guide rail is adjusted by an adjusting component.

[0038] like Figures 2-17 As shown, the assembly and adjustment device of the present invention includes a base plate 1, a guide rail 2, a base 3, a first camera 4, a laser 5, a fiber optic assembly mechanism 6, a guide rod 7, a beam splitter 8, and an adjustment component 9, which are used for the installation of TO10 and fiber optic 11; TO is a laser diode assembly package module.

[0039] like Figures 2-5 and Figure 14 As shown, a guide rail 2 is provided on the base plate 1; the base 3 is slidably engaged with the guide rail 2; the first camera 4 is provided on the base 3; the laser 5 is provided on one side of the end of the guide rail 2; the fiber optic assembly mechanism 6 is provided on the guide rail 2, and the fiber optic assembly mechanism 6 is located between the first camera 4 and the laser 5.

[0040] As described above, the base plate 1 is a flat plate with a high-precision plane, which is used as the mounting base. The guide rail 2 and the adjustment seat of the laser 5 are mounted on the base plate 1.

[0041] The base 3 is used to mount the first camera 4. The base 3 slides with the guide rail 2. A remote light source is set at a distance from the guide rail 2, and the light emitted from the remote light source is captured by the first camera 4. Then, the base 3 drives the first camera 4 to move along the guide rail 2 and selectively adjusts the position of the remote light source. If the position of the light spot captured by the first camera 4 remains unchanged, it is determined that the optical path of the remote light source is parallel to the guide rail 2. At the same time, the fiber optic assembly mechanism 6 located on the guide rail 2 also completes the coaxial calibration.

[0042] Next, the light from the remote light source is directed into the laser 5, and the laser 5 is then finely adjusted so that the light is perpendicular to the reflector of the laser 5, thus achieving coaxial alignment between the laser 5 and the optical path. Then, TO10 is installed inside the laser 5, and the light is reflected back through TO10, thus fixing TO10 in place. This completes the assembly and adjustment of TO10. With the above process, there is no need to repeatedly adjust the position of TO10, and TO10 can be assembled in one go, improving assembly accuracy and efficiency.

[0043] Finally, the optical fiber 11 for emitting light is assembled with the laser 5 through the optical fiber assembly mechanism 6.

[0044] like Figure 3 and Figure 4 As shown, the base 3 includes a sliding part 31 and a multi-degree-of-freedom adjustment seat 32. The sliding part 31 is slidably engaged with the guide rail 2. The multi-degree-of-freedom adjustment seat 32 is disposed on the sliding part 31. One end of the guide rod 7 is connected to the optical fiber assembly mechanism 6, and the other end is slidably engaged with the sliding part 31. An optical fiber sensor is arranged inside the guide rod 7.

[0045] As described above, the sliding part 31 of the base 3 is used to slide and connect with the guide rail 2, thereby driving the first camera 4 to move; at the same time, the first camera 4 and the sliding part 31 are connected through the multi-degree-of-freedom adjustment seat 32.

[0046] In practical applications, the multi-degree-of-freedom adjustment seat 32 is used to fine-tune the position of the first camera 4 so that the photosensitive surface of the first camera 4 is perpendicular to the beam of the distant light source. First, the first camera 4 captures the light spot of the distant light source, and then the first camera 4 is moved. If the beam is not parallel to the guide rail 2 during the displacement of the first camera 4, the displacement of the first camera 4 will cause the light spot to deviate. At this time, the distant light source is adjusted so that the light spot on the first camera 4 is in the same position as the previous light spot within the capture range of the first camera 4. The positions of the previous and subsequent light spots are recorded. The distant light source is then adjusted so that the beam passes through the positions of the two light spots, thus completing the parallel adjustment of the beam and the guide rail.

[0047] Since the first camera 4 was previously positioned with its photosensitive surface perpendicular to the beam of the distant light source, the light spot formed on the first camera 4 after the distant light source was adjusted will be geometrically similar to an ellipse or divergent shape. At this time, the orientation of the first camera 4 needs to be corrected by the multi-degree-of-freedom adjustment seat 32 so that the beam projection spot is transformed into a circle. This completes the coaxial calibration of the first camera 4 and the beam. Finally, the first camera 4 is moved and the straightness of the guide rail 2 is measured in conjunction with the beam to ensure that the guide rail 2 is completely parallel to the beam.

[0048] Furthermore, the remote light source is adjusted so that the beam spot falls into the center of the capture image of the first camera 4, so that the determined optical path is located above the guide rail 2; thus, the parallel centering calibration of the optical path of the remote light source and the guide rail 2 is achieved.

[0049] In this scheme, the fiber optic assembly mechanism 6 is also synchronously calibrated; specifically, after the first camera 4 and the remote light source complete the calibration of the guide rail 2, the guide rod 7 and its internal fiber optic sensor are used to calibrate part of the guide rail 2 between the fiber optic assembly mechanism 6 and the first camera 4.

[0050] The rigidity of the guide rod 7 is lower than that of the guide rail 2. When the base 3 moves the first camera 4, if there is a deviation in the shape of the guide rail 2, it will be transmitted to the guide rod 7 and detected by the fiber optic sensor inside the guide rod 7. Then, by adjusting the structure accordingly, a force is applied to the guide rail 2 to correct its shape. For example, in the prior art, a controllable force is applied to the guide rail through piezoelectric ceramics to restore the shape of the guide rail.

[0051] like Figure 4 As shown, the first camera 4 includes an adjustment rod 41, a camera 42, and a near-end light source 43. The adjustment rod 41 is mounted on the multi-degree-of-freedom adjustment base 32, and the movable end of the adjustment rod 41 can rotate and rise and fall. The camera 42 is mounted on the movable end of the adjustment rod 41. The near-end light source 43 is mounted on the camera 42. The beam splitter 8 is mounted on the near-end light source 43.

[0052] As described above, the first camera 4 is configured as an adjustable structure, which consists of an adjustment rod 41, a camera 42, and a near-end light source 43.

[0053] In practical applications, during the calibration of the beam and guide rail, the adjusting rod 41 raises the camera 42 so that the camera 42 can detect the light spot formed by the beam of the distant light source, thereby completing the calibration between the guide rail 2, the camera 42 and the distant light source.

[0054] When it is necessary to calibrate the relative position of laser 5, it can be calibrated directly through the far-end light source or through the near-end light source 43. Since the near-end light source 43 is integrated with the camera 42, the previous calibration steps actually simultaneously complete the calibration of the near-end light source 43 and the far-end light source.

[0055] Specifically, the adjustment rod 41 adopts a rotating platform and lifting rod structure. The photosensitive surfaces of the near-end light source 43 and the camera 42 are located opposite each other on both sides, so the rotating platform can be used to switch between them. When it is necessary to calibrate the laser 5 using the far-end light source, the lifting rod is used to lower the camera 42 and the near-end light source 43 to avoid interference with the optical path. In this way, the position of the laser 5 can be selectively corrected by using either the far-end light source or the near-end light source 43 to achieve laser optical axis verification at different distances. It also has the advantage of convenient operation.

[0056] like Figure 4 and Figure 16 As shown, when calibrating the laser 5 using the far-end light source, the camera 42 and the near-end light source 43 fall down. At this time, the beam splitter 8 is located in the optical path, and the incident light is split. Part of the light enters the laser, and part of the light is emitted from one side.

[0057] like Figure 13 and Figure 17 As shown, after TO10 is assembled, the reflected light will be reflected back to the beam splitter 8. At this time, part of the light returns along the original path, while part of the light is emitted through the other side of the beam splitter 8 and detected by the second camera 12, thus ensuring that TO10 is installed in one step.

[0058] like Figures 7-11 As shown, the fiber optic assembly mechanism 6 includes a base 61, a swing arm 62, a servo motor 63, and an adjustment component 64. The base 61 is located at the end of the guide rail 2 and is connected to one end of the guide rod 7. The swing arm 62 is rotatably connected to the base 61. The servo motor 63 is mounted on the base 61, and its spindle passes through the base 61 and is fixedly connected to the swing arm 62. The spindle of the servo motor 63 rotates with the base 61. The adjustment component 64 is mounted on the swing arm 62 and is used to adjust the orientation of the fiber optic cable.

[0059] As described above, in the structure of the fiber optic assembly mechanism 6, the base 61 is connected to the guide rail 2. After the straightness of the guide rail 2 is detected by the displacement of the base 3 in conjunction with the guide rod 7 and the internal fiber optic sensor, the correct position of the fiber optic assembly mechanism 6 is simultaneously determined.

[0060] In actual operation, the swing arm 62, driven by the servo motor 63, will synchronously drive the adjustment component 64 to move, so that the optical fiber 11 can be connected through the adjustment component 64, thereby completing the attitude adjustment of the optical fiber 11 and ensuring the subsequent assembly accuracy.

[0061] During the calibration of the laser 5 via the remote light source optical path, the servo motor 63 drives the swing arm 62 and the calibration component 64 to fall, so that the swing arm 62 is parallel to the guide rail 2, thereby avoiding interference with the optical path. After that, the installation of TO10 needs to be completed. When the fiber optic cable 11 is finally installed, the swing arm 62 and the calibration component 64 are raised. This integrated solution ensures the smooth progress of each calibration and calibration process step, and that each component and process does not interfere with each other, effectively improving the ease of assembly and adjustment.

[0062] like Figures 7-11 As shown, the fiber optic assembly mechanism 6 also includes a connecting frame 65 and a clamping member 66. The laser 5 is provided with an end plate 51, a first pressure plate 52, an end frame 53, and a second pressure plate 54. The end plate 51 is located at the end of the laser 5; the first pressure plate 52 is located on the side of the end plate 51 away from the laser 5; the end frame 53 is located on the side of the end plate 51 away from the laser 5; the second pressure plate 54 is located on the end frame 53; one end of the connecting frame 65 is connected to the base 61; the clamping member 66 is located on the other end of the connecting frame 65, and the clamping member 66 clamps the end plate 51 and the end frame 53.

[0063] As described above, the connecting bracket 65 is used to connect the clamping member 66 to the base 61.

[0064] In the structure of the laser 5, the first pressure plate 52 is used to fix the end plate 51 on the laser 5, the end frame 53 is connected to the end plate 51, and the second pressure plate 54 is used to cooperate with the end frame 53 to clamp and fix the optical fiber 11.

[0065] Specifically, the end plate 51, the first pressure plate 52, the end frame 53, and the second pressure plate 54 are mounted by the clamping parts 66 of the fiber optic assembly mechanism 6. Since the fiber optic assembly mechanism 6 and the first camera 4 are both integrated on the guide rail 2, the straightness of the guide rail 2 is good. After the far-end light source calibrates the laser 5, a precise and stable internal optical axis reference is established. Therefore, the fiber optic assembly mechanism 6 can be moved directly on the guide rail 2 to drive the end plate 51, the first pressure plate 52, the end frame 53, the second pressure plate 54, and the fiber 11 to move toward the laser 5, thereby completing the final assembly of the fiber 11 without participating in the optical axis alignment process.

[0066] Finally, the end plate 51 and the first pressure plate 52 are connected to the laser 5 by bolts, and the second pressure plate 54 is locked and fixed to the end frame 53 by bolts.

[0067] In some embodiments, if the fiber optic assembly mechanism 6 is not integrated on the guide rail 2, a multi-axis displacement slide is required to adjust the position of the fiber optic cable 11 so that the fiber optic cable 11 can be installed on the laser 5.

[0068] like Figure 11As shown, the calibration component 64 includes a coarse and fine adjustment rotating platform 641, a push rod 642, a clamp 643, and a sensor 644. The coarse and fine adjustment rotating platform 641 is mounted on the swing arm 62, and the swing axis of the swing arm 62 intersects the guide rail 2 on the projection plane. The push rod 642 is mounted on the movable end of the coarse and fine adjustment rotating platform 641. The clamp 643 is mounted on the movable end of the push rod 642, and the clamp 643 has an opening 601. The sensor 644 is mounted on the clamp 643.

[0069] As described above, in the structure of the adjustment component 64, the clamp 643 is used to clamp the optical fiber 11, and the clamp 643 and the optical fiber 11 are driven to rotate synchronously by the coarse and fine adjustment rotation platform 641, so as to correct the circumferential position of the optical fiber.

[0070] The sensor 644 is mounted on the clamp 643 to cooperate with the light source to correct the position of the fiber optic assembly mechanism 6 on the guide rail 2. In order to avoid interference when correcting the position of the laser 5, a push rod 642 is set on the movable end of the coarse and fine adjustment rotating platform 641 to connect to the clamp 643, so that it can drive the sensor 644 to perform lifting and lowering adjustments.

[0071] like Figure 2 and Figure 3 As shown, during the optical path calibration process, the swing arm 62 is parallel to the guide rail 2. The coarse and fine adjustment rotating platform 641, push rod 642, and clamp 643 are located on the upper side of the swing arm 62. The sensor 644 is located on the side of the clamp 643 away from the laser 5. When the optical path is parallel to the guide rail 2 and the position of the laser 5 is calibrated, the clamp 643 and sensor 644 are raised by the push rod 642 so that the light can hit the sensor 644 to achieve detection and complete the position confirmation of the fiber optic assembly mechanism 6.

[0072] like Figure 11 As shown, when confirming the position of the fiber optic assembly mechanism 6, the push rod 642 is extended and the opening 601 faces to one side; thereafter, the swing arm 62 needs to drive the clamp 643 to clamp the fiber optic cable 11 that has been pre-fixed by the end plate 51, the first pressure plate 52, the end frame 53 and the second pressure plate 54.

[0073] like Figure 15 As shown, the diameters of the front and rear ends of optical fiber 11 are significantly smaller than the diameter of the middle section.

[0074] like Figure 9As shown, the coarse and fine adjustment rotating platform 641 drives the push rod 642 and the clamp 643 to rotate so that the opening 601 faces the laser 5. Then, the push rod 642 retracts so that the clamp 643 approaches the coarse and fine adjustment rotating platform 641. At this time, when the swing arm 62 moves upward, the clamp 643 will not interfere with the optical fiber 11. The small diameter part of the end of the optical fiber 11 will enter the opening 601. Then the push rod 642 extends again to clamp the middle large diameter part of the optical fiber 11 through the clamp 643. Then the coarse and fine adjustment rotating platform 641 is rotated to correct the circumferential position of the optical fiber 11. After the correction is completed, the second pressure plate 54 is completely locked to fix the optical fiber 11.

[0075] In some embodiments, the clamping member 66 and the base 61 are configured as separate structures, so that the base 61 can drive the clamp 643 to make independent displacement adjustments, thus eliminating the need to set the push rod 642.

[0076] like Figure 2 As shown, the adjusting component 9 slides with the guide rail 2, and the adjusting component 9 is used to adjust the straightness of the guide rail 2.

[0077] As described above, the adjusting member 9 is used to adjust the straightness of the guide rail 2. Specifically, the adjusting member 9 applies a stabilizing force to the guide rail 2 locally to ensure the shape accuracy of the guide rail 2.

[0078] like Figure 5 , Figure 6 and Figure 12 As shown, the adjusting component 9 includes a positioning part 91, an adjusting part 92, a commutator 93, an adjusting motor 94, a fine-tuning rod 95, an elastic block 96, and a piezoelectric ceramic sheet 97. The guide rail 2 has a bottom slide groove 201 and a top slide groove 202. The positioning part 91 is slidably engaged with the bottom slide groove 201. The adjusting part 92 and the positioning part 91 are integrally formed. The adjusting part 92 and the sliding part 31 are slidably engaged with the top slide groove 202. The adjusting part 92 has a accommodating... The commutator 93 is disposed in the accommodating groove 901; the adjusting motor 94 is connected to the commutator 93, and the main shaft of the adjusting motor 94 is connected to the input end of the commutator 93; one end of the fine-tuning rod 95 is connected to the output end of the commutator 93; one side of the elastic block 96 abuts against the fine-tuning rod 95; one side of the piezoelectric ceramic sheet 97 abuts against the side of the elastic block 96 away from the fine-tuning rod 95, and the other side of the piezoelectric ceramic sheet 97 abuts against the inner wall of the accommodating groove 901.

[0079] As described above, the operation of the adjusting component 9 relies on the sliding cooperation of the guide rail 2, the base 3, and the guide rod 7. When the guide rail 2 is deformed, as the base 3 moves, this deformation deviation will be detected by the fiber optic sensor inside the guide rod 7 and the specific position will be marked. At this time, the adjusting component 9 can be used to adjust the marked position.

[0080] Specifically, the marking method can be to establish the same coordinate system and mark it using a computer, or to set the scale on the guide rail 2 to facilitate reading and marking.

[0081] When making adjustments, first move the adjusting member 9 to the position where the guide rail 2 needs to be adjusted. Then, the adjusting motor 94 drives the fine-tuning rod 95 to move through the commutator 93, so as to push the inner side of the guide rail 2 and restore the accuracy by causing a slight deformation of the guide rail 2.

[0082] Specifically, the fine-tuning lever 95 is set as an electric push rod, and the adjusting motor 94 provides the electric push rod with the power to extend and retract through the commutator 93. The adjusting motor 94 is a servo motor to ensure the accuracy of the action.

[0083] Furthermore, to ensure adjustment accuracy, the end area of ​​the fine-tuning rod 95 is set to be relatively small. Therefore, in order to ensure that it can accurately correspond to the adjustment position, a piezoelectric ceramic sheet 97 is provided in the receiving groove 901, and an elastic block 96 is provided between the piezoelectric ceramic sheet 97 and the fine-tuning rod 95. In this way, by energizing the piezoelectric ceramic sheet 97, the elastic block 96 is pushed, and the elastic block 96 moves the fine-tuning rod 95 to achieve radial offset, so that the end of the fine-tuning rod 95 can be accurately aligned with the part of the guide rail 2 that needs to be adjusted, thereby improving the shaping accuracy of the guide rail 2.

[0084] Specifically, since the displacement stroke of the piezoelectric ceramic sheet 97 is usually very small, the elastic block 96 can be made of a material with slight elasticity and wear resistance.

[0085] In some embodiments, the elastic block 96 is configured as a rigid filler block.

[0086] In some embodiments, an elastic block 96 is provided on one side of the fine-tuning rod 95, a rigid filling block is provided on the other side, and only one piezoelectric ceramic sheet 97 is provided.

[0087] like Figure 6 and Figure 12 As shown, in this scheme, the structure of the guide rail 2 and the structure of the adjusting part 9 are set accordingly. The lower part of the guide rail 2 is provided with a bottom slide groove 201, which slides and engages with the positioning part 91. The guide rail 2 is also provided with a top slide groove 202, which engages with the adjusting part 92. The outer wall of the top slide groove 202 is thinner than that of the bottom slide groove 201, so as to adapt to the top force applied by the adjusting part 9 and facilitate correction. The outer wall of the bottom slide groove 201 is thicker, so it can engage with the positioning part 91 of the adjusting part 9 to achieve stable positioning, which helps to ensure the accuracy of the correction of the guide rail 2.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for assembling and adjusting a collimated laser with degrees of freedom that can be eliminated, characterized in that, Includes the following steps: S1. Set up a guide rail, place a remote light source at one end of the guide rail and a laser at the other end, and install a base on the guide rail to mount a first camera. Set up an optical fiber assembly mechanism between the first camera and the laser, and place a second camera on one side of the guide rail. Set up a guide rod to connect the optical fiber assembly mechanism, and slide the base and the guide rod together. An optical fiber sensor is installed inside the guide rod. Slide the base to drive the first camera to move towards the optical fiber assembly mechanism. After the optical fiber sensor detects the deformation of the guide rod, adjust the straightness of the guide rail by adjusting the adjustment component. S2. Light is emitted to the first camera through the remote light source. Then the first camera is moved along the guide rail, and the remote light source is adjusted so that the light spot captured by the first camera always stays in the same position, ensuring that the guide rail is parallel to the light. S3. Adjust the attitude of the first camera to avoid the light path, and simultaneously place the beam splitter on the light path. The light passes through the beam splitter and is split and directed to the sensor of the fiber optic assembly mechanism to ensure accurate positioning between the fiber optic assembly mechanism, the guide rail and the first camera. S4. Adjust the posture of the fiber optic assembly mechanism to avoid the optical path of the light. The light passes through the beam splitter and enters the laser. Adjust the posture of the laser to ensure that the light is perpendicular to the laser lens. S5. Install TO into the laser, adjust the position of TO so that the light is reflected along the original path. After the reflected light is split by the beam splitter, it enters the second camera for detection to ensure that the light is reflected along the original path. Then fix TO. S6. Turn off the remote light source, assemble the optical fiber onto the optical fiber assembly mechanism, and then adjust the attitude of the optical fiber relative to the laser end face and relative to its own circumference through the optical fiber assembly mechanism. After the adjustment is completed, fix the optical fiber to the laser.

2. An assembly and adjustment device, applied to the assembly and adjustment method of a collimated laser with extinguishable degrees of freedom as described in claim 1, characterized in that: It includes a base plate (1), a guide rail (2), a base (3), a first camera (4), a laser (5), and a fiber optic assembly mechanism (6), among which, The guide rail (2) is provided on the base plate (1); The base (3) is slidably engaged with the guide rail (2); The first camera (4) is mounted on the base (3); The laser (5) is disposed on one side of the end of the guide rail (2); The fiber optic assembly mechanism (6) is mounted on the guide rail (2) and is located between the first camera (4) and the laser (5).

3. The assembly and adjustment device as described in claim 2, characterized in that: It also includes a guide rod (7), and the base (3) includes a sliding part (31) and a multi-degree-of-freedom adjustment seat (32), wherein, The sliding part (31) is slidably engaged with the guide rail (2); The multi-degree-of-freedom adjustment seat (32) is disposed on the sliding part (31), and the first camera (4) is disposed on the multi-degree-of-freedom adjustment seat (32); One end of the guide rod (7) is connected to the optical fiber assembly mechanism (6), and the other end is slidably engaged with the sliding part (31). An optical fiber sensor is arranged inside the guide rod (7).

4. The assembly and adjustment device as described in claim 3, characterized in that: It also includes a beam splitter (8), and the first camera (4) includes an adjustment rod (41), a camera (42), and a near-end light source (43), wherein, The adjusting rod (41) is mounted on the multi-degree-of-freedom adjusting seat (32), and the movable end of the adjusting rod (41) can rotate and rise and fall. The camera (42) is mounted on the movable end of the adjusting rod (41); The near-end light source (43) is mounted on the camera (42); The beam splitter (8) is mounted on the near-end light source (43).

5. The assembly and adjustment device as described in claim 3 or 4, characterized in that: The fiber optic assembly mechanism (6) includes a base (61), a swing arm (62), a servo motor (63), and an adjustment component (64), wherein, The base (61) is disposed at the end of the guide rail (2), and the base (61) is connected to one end of the guide rod (7); The swing arm (62) is rotatably connected to the base (61); The servo motor (63) is mounted on the base (61). The main shaft of the servo motor (63) passes through the base (61) and is fixedly connected to the swing arm (62). The main shaft of the servo motor (63) is rotatably engaged with the base (61). The adjustment component (64) is disposed on the swing arm (62) and is used to adjust the attitude of the optical fiber.

6. The assembly and adjustment device as described in claim 5, characterized in that: The fiber optic assembly mechanism (6) further includes a connecting frame (65) and a clamping component (66). The laser (5) is provided with an end plate (51), a first pressure plate (52), an end frame (53), and a second pressure plate (54). The end plate (51) is disposed at the end of the laser (5); The first pressure plate (52) is disposed on the side of the end plate (51) away from the laser (5); The end frame (53) is located on the side of the end plate (51) away from the laser (5); The second pressure plate (54) is disposed on the end frame (53); One end of the connecting frame (65) is connected to the base (61); The clamping member (66) is disposed on the other end of the connecting frame (65), and the clamping member (66) clamps the end plate (51) and the end frame (53).

7. The assembly and adjustment device as described in claim 6, characterized in that: The calibration component (64) includes a coarse and fine adjustment rotating platform (641), a push rod (642), a clamp (643), and a sensor (644), wherein, The coarse and fine adjustment rotating platform (641) is mounted on the swing arm (62), and the axis of the swing arm (62) intersects the guide rail (2) on the projection plane; The push rod (642) is mounted on the movable end of the coarse and fine adjustment rotating platform (641); The clamp (643) is disposed on the movable end of the push rod (642), and the clamp (643) is provided with an opening (601). The sensor (644) is mounted on the clamp (643).

8. The assembly and adjustment device as described in claim 3 or 4, characterized in that: It also includes an adjusting member (9), which slides with the guide rail (2) and is used to adjust the straightness of the guide rail (2).

9. The assembly and adjustment device as described in claim 8, characterized in that: The adjusting component (9) includes a positioning part (91), an adjusting part (92), a commutator (93), an adjusting motor (94), a fine-tuning rod (95), an elastic block (96), and a piezoelectric ceramic sheet (97). The guide rail (2) has a bottom groove (201) and a top groove (202). The positioning part (91) is slidably engaged with the bottom groove (201); The adjustment part (92) and the positioning part (91) are an integral structure. The adjustment part (92) and the sliding part (31) are slidably engaged with the top slide groove (202), and the adjustment part (92) is provided with a receiving groove (901). The commutator (93) is disposed within the receiving slot (901); The regulating motor (94) is connected to the commutator (93), and the main shaft of the regulating motor (94) is connected to the input end of the commutator (93); One end of the fine-tuning rod (95) is connected to the output end of the commutator (93); One side of the elastic block (96) abuts against the fine-tuning rod (95); One side of the piezoelectric ceramic sheet (97) abuts against the elastic block (96) away from the fine-tuning rod (95), and the other side of the piezoelectric ceramic sheet (97) abuts against the inner wall of the receiving groove (901).

Images