Light spot projection detection type multi-lens coupling machine

Abstract

The invention relates to the technical field of optical device coupling and packaging, in particular to a light spot projection detection type multi-lens coupling machine which comprises a substrate positioning assembly, a lens feeding assembly, a lens clamping and coupling assembly and a light spot detection assembly. The light spot detection assembly comprises a light path control sub-assembly and a projection detection sub-assembly; the light path control sub-assembly comprises a plurality of reflection units, the projection detection sub-assembly comprises a projection box, a first beam splitter, a light spot detection camera and a detection lens, the first end of the projection box is provided with a projection surface, the light spot detection camera is arranged at the second end of the projection box, and the detection lens is arranged at the second end of the projection box. The first beam splitter is located between the projection plane and the light spot detection camera. According to the invention, through the light path control sub-assembly and the projection detection sub-assembly, the propagation path length of the collimated light beam and the light spot size are significantly improved, so that the light spot detection precision is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of optical device coupling and packaging technology, and in particular to a spot projection detection type multi-lens coupler. Background Technology

[0002] With the continuous improvement of semiconductor laser packaging precision, higher requirements are also placed on the coupling precision of the alignment lens in order to ensure output power. This not only requires high-precision control of multi-axis displacement modules, fixtures, etc., but also requires accurate detection of coupling precision, so that when the coupling is inaccurate, the coupling position can be confirmed and adjusted until the coupling precision meets the standard.

[0003] For example, in existing technologies, the automatic coupling and packaging method for collimating lenses uses spot detection to confirm coupling accuracy. The lens is moved to the coupling position, and a spot detection camera performs spot detection on the collimated beam of the lens at a near point. The lens tilt angle is adjusted until the spot is circular, indicating that the lens tilt coupling is up to standard. The coordinates of the spot detected at the near point are recorded. Then, the spot detection camera is moved to a far point, and the coordinates of the spot detected at the far point are recorded and compared with those detected at the near point. When the coordinate error is within a preset range, the lens coupling position is up to standard; when the coordinate error is greater than the preset value, the lens position is deviated and needs adjustment. During lens adjustment, the coordinates of the spot detected at the far point will change. When it coincides with the near point detection and the degree of coincidence meets a preset requirement, the lens coupling position is up to standard. At this point, the spot detection camera is moved again, and multiple far point detections are performed at different positions to check whether the spot coordinates coincide with those detected at the near point, further verifying the lens coupling accuracy. If the changing far-point detection cannot maintain spot overlap, or if the spot of the initial far-point detection cannot overlap with that of the near-point detection, then the lens needs to be recoupled or replaced.

[0004] This spot detection method has the following problems: First, it requires moving the spot detection camera multiple times, which reduces the detection efficiency. Second, the detection beam is directly incident on the spot detection camera, which limits the size of the optical channel of the spot detection camera and cannot detect large-sized spots. However, large-sized spots can further improve the detection accuracy, so further improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a solution with higher spot detection accuracy to address the shortcomings of the aforementioned background technology, thereby improving lens coupling accuracy and packaging quality.

[0006] To achieve the above objectives, the present invention provides a spot projection detection type multi-lens coupler, including a substrate positioning assembly, a lens loading assembly, a lens clamping and coupling assembly, and a spot detection assembly. The substrate positioning assembly is used to position the substrate, and the lens loading assembly is used to load the lens; the lens clamping and coupling assembly has multiple degrees of freedom of movement, and the lens clamping and coupling assembly is used to clamp the lens from the lens loading assembly and move the lens to the corresponding coupling position on the substrate for coupling. The spot detection component includes an optical path control sub-component and a projection detection sub-component; The optical path control sub-component includes multiple reflection units, each of which is equipped with a reflector. The reflection units are spaced apart by a preset distance in the device space. The collimated beam after being collimated by the lens is transmitted to the first reflection unit, and then reflected and transmitted to the next reflection unit in sequence. The last reflection unit reflects the collimated beam and transmits it to the projection detection sub-component. The projection detection sub-assembly includes a projection box, a first beam splitter, a spot detection camera, and a detection lens. A projection surface is provided at the first end of the projection box, and the spot detection camera is provided at the second end of the projection box. The first beam splitter is located between the projection surface and the spot detection camera. The first beam splitter is used to propagate the collimated beam toward the projection surface to form a projection spot on the projection surface. The detection lens is connected to the spot detection camera. The spot detection camera captures the projection spot on the projection surface through the detection lens to compare with the standard position of the projection spot to confirm the lens coupling accuracy.

[0007] Furthermore, the reflection unit includes a first reflection unit, a second reflection unit, a third reflection unit, and a fourth reflection unit. The first reflection unit is disposed above the substrate positioning assembly, and the second reflection unit, the third reflection unit, the fourth reflection unit, and the projection box are respectively located at four diagonal positions in the device space.

[0008] Furthermore, it also includes an attitude detection component, which includes an attitude detection camera, a second beam splitter, a third beam splitter, a first light source, a second light source, and a third light source. The attitude detection camera is arranged along a first direction, the first light source is arranged along a first direction, the second light source is arranged along a second direction and aligned with the second beam splitter in the second direction, and the third light source is arranged along a third direction and aligned with the third beam splitter in the third direction.

[0009] Furthermore, the lens loading assembly includes a lens tray and a tray support frame detachably connected to the lens tray. The lens tray is provided with a plurality of lens positioning slots for placing and positioning lenses. The lens clamping coupling assembly sequentially clamps lenses from each of the lens positioning slots.

[0010] Furthermore, the substrate positioning assembly includes a substrate positioning stage and a heat dissipation mechanism located below the substrate positioning stage. The substrate positioning stage has a substrate positioning groove for positioning the substrate. The substrate positioning groove has a structure for contacting the substrate to conduct electricity. The heat dissipation mechanism is in contact with the substrate positioning stage and is used to dissipate heat to the area where the substrate is located.

[0011] Furthermore, the substrate positioning assembly also includes a light-shielding plate and a first motion module. The light-shielding plate has a light-passing port, the size of which matches the size of the collimated beam after collimation by a single lens. The light-shielding plate is connected to the first motion module, which is used to drive the light-shielding plate to translate and align the light-passing port with the positions of the lenses to be coupled in sequence.

[0012] Furthermore, the heat dissipation mechanism includes a fan and a grille, the grille being in contact with the substrate positioning stage, and the fan being aligned with the grille.

[0013] Furthermore, the lens clamping coupling assembly includes a second motion module and a lens clamp connected to the second motion module. The second motion module has translational degrees of freedom of the X-axis, Y-axis, and Z-axis, as well as multiple rotational degrees of freedom. The lens clamp is provided with a lens chuck, and a pressure sensor is provided on the lens chuck. The pressure sensor is used to provide feedback on the pressure after clamping the lens.

[0014] The above-described solution of the present invention has the following beneficial effects: The present invention provides a multi-lens coupler with a beam projection detection type. The beam detection component is equipped with an optical path control sub-component and a projection detection sub-component. The optical path control sub-component can extend the transmission optical path, thereby amplifying the coupling deviation between the lens and the substrate, further improving the accuracy of beam detection, and thus further improving the coupling accuracy between the lens and the substrate. The projection detection sub-component can reflect the collimated beam onto the projection surface to form a projected beam. The beam detection camera can capture the image in front through the detection lens, with a wider shooting angle, and can capture a larger projected beam, thereby performing large beam detection with higher accuracy, thus further improving the coupling accuracy between the lens and the substrate. In this invention, by setting up the attitude detection component, when detecting the attitude of the lens (i.e. the accuracy of the lens clamping coupling component), it is only necessary to move the lens itself through the lens clamping coupling component to complete the three-view (three-direction) detection of the lens, without having to move the attitude detection camera, beam splitter, etc., which simplifies the structural form and control steps and improves the detection efficiency. This invention is applicable to the coupling and packaging of multiple lenses and substrates; Other beneficial effects of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the optical path control sub-assembly and collimated beam of the invention; Figure 3 This is a schematic diagram of the projection detection sub-component of the present invention; Figure 4 This is a schematic diagram of the attitude detection component structure of the present invention; Figure 5 This is a schematic diagram of the attitude detection component of the present invention, wherein (a) shows the front-back and left-right attitudes of the detection lens, and (b) shows the up-down attitude of the detection lens; Figure 6 This is a schematic diagram of the lens loading assembly of the present invention; Figure 7 This is a schematic diagram of the lens clamping coupling assembly of the present invention; Figure 8 for Figure 7 Enlarged view of point A (complete part); Figure 9 This is a schematic diagram of the connection of the light-shielding plate of the present invention.

[0016] [Explanation of Labels in the Attached Image] 10-Substrate positioning assembly; 11-Substrate positioning stage; 12-Heat dissipation mechanism; 13-Light shield; 14-Light transmission port; 15-First motion module; 20-Lens loading assembly; 21-Lens tray; 22-Tray support frame; 30-Lens clamping coupling assembly; 31-Second motion module; 32-Lens fixture; 33-Dispensing assembly; 34-Curing assembly; 35-Vision inspection camera; 40-Attitude detection assembly; 41-Attitude detection camera; 42-Second beam splitter; 43-Third beam splitter; 44 45-First light source; 46-Second light source; 500-Spot detection assembly; 510-Optical path control subassembly; 511-First reflection unit; 512-Second reflection unit; 513-Third reflection unit; 514-Fourth reflection unit; 515-Reflector; 516-Mounting arm; 520-Projection detection subassembly; 521-Projection box; 522-First beam splitter; 523-Spot detection camera; 524-Detection lens; 525-First projection surface; 6-Substrate; 7-Lens. Detailed Implementation

[0017] To make the technical problems, solutions, and advantages of this invention clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. 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. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a locking 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] like Figures 1-2 As shown, an embodiment of the present invention provides a spot projection detection type multi-lens coupler, including a substrate positioning assembly 10 (laser), a lens loading assembly 20, a lens clamping and coupling assembly 30, an attitude detection assembly 40, and a spot detection assembly 500. When the substrate 6 is loaded and positioned by the substrate positioning assembly 10, the lens clamping and coupling assembly 30 picks up the lens 7 to be coupled from the lens loading assembly 20. First, the attitude detection assembly 40 checks the clamping accuracy, i.e., whether the lens 7 is accurately clamped by the lens clamping and coupling assembly 30. Then, the lens 7 is moved to a preset position on the substrate 6, i.e., the coupling position, for coupling. The substrate 6 is provided with a light-emitting chip. After the substrate positioning assembly 10 powers the substrate 6, the light-emitting chip emits a light beam, which is collimated by the lens 7 to form a collimated beam. The projected spot formed by projecting this collimated beam is then detected.

[0021] It is understandable that the collimated beam after passing through lens 7 is usually related to the arrangement of substrate 6, for example... Figure 2The collimated beam passing through lens 7 is transmitted along the Z-axis (vertically upward). Typically, the spot detection component 500 is positioned to one side of the substrate positioning component 10 rather than directly above it. Therefore, the spot detection component 500 needs to guide the collimated beam to ultimately project it to a preset position for spot detection. Based on this, in this embodiment, the spot detection component 500 further includes an optical path control sub-component 510 and a projection detection sub-component 520. The optical path control sub-component 510 is used to reflect the collimated beam passing through lens 7, etc., so that the collimated beam can ultimately be delivered to the projection detection sub-component 520.

[0022] During the spot detection process, when the position of lens 7 relative to substrate 6 shifts, the actual projected spot of the collimated beam on the projection surface will deviate from the standard projected spot (i.e., the projected spot when coupling is perfectly accurate). Furthermore, this deviation increases with the length of the transmission optical path, i.e., the greater the distance between the projection surface and lens 7. Therefore, extending the transmission optical path amplifies the coupling deviation between lens 7 and substrate 6, thereby further improving the accuracy of spot detection and, consequently, the coupling accuracy between lens 7 and substrate 6. Based on this, the optical path control sub-component 510 in this embodiment includes multiple reflection units. The first reflection unit 511 is disposed directly above the substrate positioning component 10 and is used to reflect the collimated beam transmitted along the Z-axis direction through the lens 7 into a collimated beam transmitted along the X-axis direction. The second reflection unit 512 is disposed opposite to the first reflection unit 511 along the X-axis and is used to reflect the collimated beam transmitted along the X-axis direction into a collimated beam transmitted along the Z-axis direction. The third reflection unit 513 is disposed opposite to the second reflection unit 512 along the Z-axis and is used to reflect the collimated beam transmitted along the Z-axis direction into a collimated beam transmitted along the X-axis direction. The fourth reflection unit 514 is disposed opposite to the third reflection unit 513 along the X-axis and is used to reflect the collimated beam transmitted along the X-axis direction into a collimated beam transmitted along the Z-axis direction, thereby transmitting the beam to the projection detection sub-component 520. The first reflective unit 511 is located directly above and relatively close to the substrate positioning assembly 10, while the second reflective unit 512, the third reflective unit 513, and the fourth reflective unit 514 are located at three diagonal positions on the space occupied by the entire device. The projection detection sub-assembly 520 is arranged at the fourth diagonal position. This significantly extends the transmission optical path, thereby significantly improving the accuracy of the final spot detection. Of course, this layout is not limited to this method. More reflective units can be set according to the actual space of the device to extend the transmission optical path as much as possible. It should also be noted that the solution given in this embodiment extends the transmission optical path multiple times in the X-axis and Z-axis directions. It is also possible to further consider extending it in the Y-axis direction or in non-coordinate axis directions, etc. Those skilled in the art can set and adjust it according to the actual situation.

[0023] Therefore, in this embodiment, the optical path control sub-assembly 510 includes a first reflection unit 511, a second reflection unit 512, a third reflection unit 513, and a fourth reflection unit 514, each equipped with a reflector 515. Each reflector 515 is at a 45-degree angle to the horizontal plane, allowing the transmission optical path to propagate and undergo multiple reflections as described above. The optical path control sub-assembly 510 also includes a mounting arm 516. The third reflection unit 513 and the fourth reflection unit 514 are connected to the top of their respective mounting arms 516, enabling them to be supported at a higher position to maximize the length of the optical path in the Z-axis direction. The mounting arm 516 may have slots to facilitate adjustments to the mounting positions of the third reflection unit 513 and the fourth reflection unit 514, improving flexibility.

[0024] At the same time, such as Figure 3 As shown, the projection detection sub-assembly 520 includes a projection box 521, a first beam splitter 522, a spot detection camera 523, and a detection lens 524. The projection box 521 has a projection surface at its first end, the spot detection camera 523 is located at its second end, and the first beam splitter 522 is positioned between the projection surface and the spot detection camera 523. The collimated beam reflected from the fourth reflection unit 514 directly corresponds to the opening of the projection box 521, enters through the opening, and illuminates the first beam splitter 522. The first beam splitter 522 reflects the collimated beam onto the projection surface based on its wavelength, forming a projected spot. At this time, the spot detection camera 523, located at the second end, can pass through the first beam splitter 522 and capture the projected spot on the projection surface. Then, it compares the offset of the projected spot position with a standard position to detect the coupling accuracy.

[0025] The detection lens 524 is connected to the spot detection camera 523, enabling the spot detection camera 523 to capture images from the front. Due to the detection lens 524, which typically has a wider shooting angle, the spot detection camera 523 can capture larger projected spots. Specifically, when the outer diameter of the collimated beam is larger than the optical channel of the spot detection camera 523, the detection lens 524 can accurately capture the complete projected spot, thus enabling large spot detection. For collimated beams with circular spots, as mentioned in the background art, when the lens 7 is angularly deflected relative to the substrate 6, the spot will not be perfectly circular but rather elliptical. Therefore, the roundness of the spot also needs to meet the standard to confirm that the angular coupling between the lens 7 and the substrate 6 is satisfactory. Based on this, using a large spot to detect roundness also provides higher accuracy, further improving the coupling accuracy between the lens 7 and the substrate 6.

[0026] In a preferred embodiment, the projection surface in this example includes a first projection surface 525, which is the projection surface of the collimated beam after reflection by the first beam splitter 522. Figure 4As shown. Since the collimated beam and the spot detection camera 523 are orthogonal in orientation, when the spot detection camera 523 captures the projected spot of the first projection surface 525, the light beam needs to pass through the first beam splitter 522 without reflection to accurately capture the image of the first projection surface 525. Based on this, the first beam splitter 522 can be configured as a voltage-adjustable beam splitter or the like, to adjust the corresponding refractive index, so that the spot detection camera 523 can successfully capture the projected spot of the first projection surface 525. Alternatively, a second projection surface or the like can be set in other positions, in which case the first beam splitter 522 needs to be adjusted. In summary, the spot detection component 500 provided in this embodiment, through the optical path control sub-component 510 and the projection detection sub-component 520, significantly improves the path length of the collimated beam propagation and the spot size, thereby significantly improving the accuracy of spot detection.

[0027] As mentioned earlier, lens 7 is clamped and positioned by lens clamping coupling assembly 30. On one hand, the control precision of lens clamping coupling assembly 30 itself has a significant impact on the coupling precision of lens 7. On the other hand, the lens clamping coupling assembly 30 also significantly affects the clamping and positioning precision of lens 7. When lens clamping coupling assembly 30 shifts or deflects while holding lens 7, adjustment becomes difficult, and may even be impossible, to achieve the required coupling precision. Therefore, in this embodiment, attitude detection assembly 40 is used to detect the attitude of lens clamping coupling assembly 30 holding lens 7, thereby confirming the positioning precision of lens 7. Specifically, as follows... Figure 4 , Figure 5 As shown, the attitude detection component 40 includes an attitude detection camera 41, a second beam splitter 42, a third beam splitter 43, a first light source 44, a second light source 45, and a third light source 46. The second beam splitter 42 and the third beam splitter 43 can be fitted together. The attitude detection camera 41 is positioned along a first direction, the first light source 44 is also positioned along the first direction and is located on either side of the two beam splitters, respectively. The second light source 45 is positioned along a second direction and aligned with the second beam splitter 42 in the second direction. The third light source 46 is positioned along a third direction and aligned with the third beam splitter 43 in the third direction. Therefore, when performing attitude detection on the lens 7, only the lens 7 itself needs to be moved via the lens clamping coupling component 30 to complete the three-view (three-direction) detection of the lens 7, without needing to move the attitude detection camera 41, beam splitters, etc., simplifying the structure and control steps and improving detection efficiency.

[0028] For example, the first direction can be the X-axis, the second direction can be the Y-axis, and the third direction can be the Z-axis. When detecting the front-back attitude of lens 7, lens 7 is moved directly between the attitude detection camera 41 and the first light source 44. The light emitted from the first light source 44 is along the X-axis, can penetrate the two beam splitters, and illuminate the position of lens 7, thus being directly acquired by the attitude detection camera 41. When detecting the left-right attitude of lens 7, lens 7 is moved between the second light source 45 and the second beam splitter 42. The light emitted from the second light source 45 is along the Y-axis. After illuminating lens 7, the light is reflected by the second beam splitter 42 to be along the X-axis, and then can penetrate the third beam splitter 43 and be acquired by the attitude detection camera 41. When detecting the up-down attitude of lens 7, lens 7 is moved between the third light source 46 and the third beam splitter 43. The light emitted from the third light source 46 is along the Z-axis. After illuminating lens 7, the light is reflected by the third beam splitter 43 to be along the X-axis, thus being acquired by the attitude detection camera 41. Ultimately, only the lens 7 itself needs to be moved to complete the three-view detection. In addition, if the lens 7 is found to be improperly clamped and positioned, the lens clamping coupling assembly 30 can transfer the lens 7 to the transfer platform for re-clamping, or transfer it to the waste collection area, and then directly clamp a new lens 7 for coupling, etc.

[0029] In this embodiment, the lens clamping and coupling assembly 30 automatically clamps the lens 7 from the lens loading assembly 20 for coupling, while the loading of the substrate 6 to the substrate positioning assembly 10 requires manual labor or other equipment. Meanwhile, as... Figure 6 As shown, the lens loading assembly 20 includes a lens tray 21 and a tray support frame 22 detachably connected to the lens tray 21. The lens tray 21 is provided with a large number of lens positioning slots for placing and positioning lenses 7. The lens clamping and coupling assembly 30 sequentially clamps the lenses 7 from each lens positioning slot for coupling. After all the lenses 7 are removed, a new full-load lens tray 21 is replaced. It can be understood that the positioning of the lens 7 in the lens positioning slot determines the accuracy of the lens clamping and coupling assembly 30 in clamping the lens 7. When the lens 7 is not accurately placed in the lens positioning slot, the posture of the lens clamping and coupling assembly 30 after clamping and positioning the lens 7 will be inaccurate.

[0030] At the same time, such as Figure 7As shown, the lens clamping and coupling assembly 30 includes a second motion module 31 and a lens clamp 32 connected to the second motion module 31. The second motion module 31 has translational degrees of freedom along the X, Y, and Z axes, as well as multiple rotational degrees of freedom. These degrees of freedom allow the lens clamp 32 to flexibly perform the clamping and coupling process of the lens 7. Its high-precision module ensures the fine-tuning accuracy of the coupling position, enabling the lens 7 to meet high-precision coupling requirements. The lens clamp 32 itself adopts a form found in existing technology, driven by a motor, etc. In this embodiment, a pressure sensor is further provided on the lens chuck of the lens clamp 32. The pressure sensor provides feedback on the pressure after clamping the lens 7, which can also confirm the accuracy of the lens 7 clamping and positioning from another perspective.

[0031] At the same time, such as Figure 8 As shown, the substrate positioning assembly 10 includes a substrate positioning stage 11 and a heat dissipation mechanism 12 located below the substrate positioning stage 11. The substrate positioning stage 11 has a substrate positioning groove for positioning the substrate 6, the size of which matches the substrate 6 to accurately position the substrate 6. It also has contacts to energize the substrate 6, allowing the light-emitting chip to emit a light beam. The heat dissipation mechanism 12 uses a fan and a grid to contact the substrate positioning stage 11, ensuring that heat in the area where the substrate 6 is located is dissipated in a timely manner, preventing the performance of the light-emitting chip from being affected during prolonged coupling.

[0032] In the actual packaging process, multiple lenses 7 need to be packaged in the same row on the same substrate 6. After the substrate 6 is powered on, the emitted beam of the light-emitting chip will pass through the positions of each lens 7 simultaneously, thus generating multiple collimated beams. During the coupling process, each lens 7 needs to be coupled independently and sequentially. Please refer again to... Figure 8 In this embodiment, the substrate positioning assembly 10 also includes a light-shielding plate 13, on which a light-passing port 14 is provided. The size of the light-passing port 14 matches the size of the collimated beam of the lens 7. For example... Figure 8 The light-passing port 14 is elongated, and the lens 7 is a single-surface curved lens, so the cross-section of its collimated beam is also elongated (a collimating mirror is actually provided below the light-shielding plate 13). The light-shielding plate 13 is connected to the first motion module 15, which has translational freedom along the X-axis or Y-axis (based on the actual arrangement direction of the substrate 6), so that the light-shielding plate 13 can be translated to align the light-passing port 14 sequentially with the positions of the lenses 7 to be coupled, thereby allowing the collimated beam of the corresponding lens 7 to pass through the light-shielding plate 13 and be transmitted to the first reflection unit 511 for subsequent spot detection, such as... Figure 9 As shown.

[0033] In addition, the entire device is equipped with a dispensing assembly 33 and a curing assembly 34. The dispensing assembly 33 includes multiple dispensing heads, which are used to dispense adhesive at the coupling positions of the lenses 7. The curing assembly 34 is used to UV cure the adhesive at the coupling positions of the lenses 7 and the substrate 6 to complete the coupling and encapsulation of each lens 7. A vision inspection camera 35 is also provided at the corresponding coupling positions to visually inspect the coupling positions of the lenses 7 and the substrate 6, assisting in confirming the smooth progress of the coupling process.

[0034] Using the spot projection detection type multi-lens coupler provided in this embodiment, after the substrate 6 is loaded and positioned by the substrate positioning assembly 10, the substrate 6 is powered on to allow the light-emitting chip to emit a light beam. The lens clamping coupling assembly 30 clamps the lens 7 from the lens tray 21 and moves it to the attitude detection assembly 40 to detect the attitude of the lens 7. If the attitude is not qualified, it is adjusted or a new lens 7 is clamped. Then, the lens 7 is moved to the coupling position corresponding to the substrate 6 for coupling. The lens 7 converts the light beam emitted by the light-emitting chip into a collimated light beam, which passes through the light shield 13 and is transmitted to the first reflection unit 511. Then, it passes through the first reflection unit 511 and the second reflection unit 511 in sequence. After reflection by the beam-emitting unit 512, the third reflection unit 513, and the fourth reflection unit 514, the beam enters the projection box 521. The first beam-splitter 522 inside the projection box 521 reflects the collimated beam onto the first projection surface 525 for projection. The spot detection camera 523 captures the projected spot on the corresponding projection surface through the detection lens 524. This spot is the image of the collimated beam after long-distance transmission and projection. The coupling accuracy between the lens 7 and the substrate 6 is confirmed by the offset between the actual position of the projected spot and the preset position. When the coupling accuracy meets the standard, the dispensing assembly 33 dispenses adhesive, and the curing assembly 34 cures the dispensing position, completing the coupling and encapsulation of the corresponding lens 7. After all the lenses 7 on the same substrate 6 have been coupled and encapsulated, the substrate 6 is removed and replaced with a new substrate 6 to be encapsulated, and the coupling and encapsulation of multiple lenses 7 on the next substrate 6 is performed.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A spot projection detection type multi-lens coupler, characterized in that, This includes a substrate positioning assembly, a lens loading assembly, a lens clamping and coupling assembly, and a spot detection assembly; The substrate positioning assembly is used to position the substrate, and the lens loading assembly is used to load the lens; the lens clamping and coupling assembly has multiple degrees of freedom of movement, and the lens clamping and coupling assembly is used to clamp the lens from the lens loading assembly and move the lens to the corresponding coupling position on the substrate for coupling. The spot detection component includes an optical path control sub-component and a projection detection sub-component; The optical path control sub-component includes multiple reflection units, each of which is equipped with a reflector. The reflection units are spaced apart by a preset distance in the device space. The collimated beam after being collimated by the lens is transmitted to the first reflection unit, and then reflected and transmitted to the next reflection unit in sequence. The last reflection unit reflects the collimated beam and transmits it to the projection detection sub-component. The projection detection sub-assembly includes a projection box, a first beam splitter, a spot detection camera, and a detection lens. A projection surface is provided at the first end of the projection box, and the spot detection camera is provided at the second end of the projection box. The first beam splitter is located between the projection surface and the spot detection camera. The first beam splitter is used to propagate the collimated beam toward the projection surface to form a projection spot on the projection surface. The detection lens is connected to the spot detection camera. The spot detection camera captures the projection spot on the projection surface through the detection lens to compare with the standard position of the projection spot to confirm the lens coupling accuracy.

2. The spot projection detection type multi-lens coupler according to claim 1, characterized in that, The reflection unit includes a first reflection unit, a second reflection unit, a third reflection unit, and a fourth reflection unit. The first reflection unit is disposed above the substrate positioning assembly, and the second reflection unit, the third reflection unit, the fourth reflection unit, and the projection box are respectively located at the four diagonal positions of the device space.

3. The spot projection detection type multi-lens coupler according to claim 1, characterized in that, It also includes an attitude detection component, which includes an attitude detection camera, a second beam splitter, a third beam splitter, a first light source, a second light source, and a third light source. The attitude detection camera is arranged along a first direction, the first light source is arranged along a first direction, the second light source is arranged along a second direction and aligned with the second beam splitter in the second direction, and the third light source is arranged along a third direction and aligned with the third beam splitter in the third direction.

4. The spot projection detection type multi-lens coupler according to claim 1, characterized in that, The lens loading assembly includes a lens tray and a tray support frame detachably connected to the lens tray. The lens tray is provided with a plurality of lens positioning slots for placing and positioning lenses. The lens clamping coupling assembly sequentially clamps lenses from each of the lens positioning slots.

5. The spot projection detection type multi-lens coupler according to claim 1, characterized in that, The substrate positioning assembly includes a substrate positioning stage and a heat dissipation mechanism located below the substrate positioning stage. The substrate positioning stage has a substrate positioning groove for positioning the substrate. The substrate positioning groove has a structure for contacting the substrate to conduct electricity. The heat dissipation mechanism is in contact with the substrate positioning stage and is used to dissipate heat in the area where the substrate is located.

6. The spot projection detection type multi-lens coupler according to claim 5, characterized in that, The heat dissipation mechanism includes a fan and a grille, the grille is in contact with the substrate positioning stage, and the fan is aligned with the grille.

7. The spot projection detection type multi-lens coupler according to claim 6, characterized in that, The substrate positioning assembly further includes a light-shielding plate and a first motion module. The light-shielding plate has a light-passing port, the size of which matches the size of the collimated beam after collimation by a single lens. The light-shielding plate is connected to the first motion module, which drives the light-shielding plate to translate and align the light-passing port with the positions of the lenses to be coupled in sequence.

8. The spot projection detection type multi-lens coupler according to claim 1, characterized in that, The lens clamping coupling assembly includes a second motion module and a lens clamp connected to the second motion module. The second motion module has translational degrees of freedom in the X, Y, and Z axes and multiple rotational degrees of freedom. The lens clamp is provided with a lens chuck, and a pressure sensor is provided on the lens chuck. The pressure sensor is used to provide feedback on the pressure after clamping the lens.

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