A focusing lens coupling method and a coupling device

Abstract

A focusing lens coupling method and coupling device for coupling a focusing lens to a pump source housing. An optical fiber is disposed inside the pump source housing. The method includes obtaining the position information of the optical fiber end face through a slot in the pump source housing; setting the focusing lens at an initial position inside the pump source housing; determining a target position of the focusing lens inside the pump source housing based on the initial position of the focusing lens, a preset relationship between the optical fiber end face and the focusing lens output surface of the focusing lens, and the position information of the optical fiber end face, and adjusting the focusing lens to the target position. The present invention improves the coupling efficiency and coupling accuracy. When the optical fiber is tilted, it can automatically detect and adjust the position and angle of the focusing lens to ensure that the light can be accurately coupled into the optical fiber, thereby improving the output characteristics of the pump source.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor devices, and more particularly to a focusing mirror coupling method and a coupling device. Background Art

[0002] In the field of laser technology, the pump source is a core component. There is a focusing mirror inside the pump source, and the position of the focusing mirror directly affects the output quality and efficiency of the laser. The traditional coupling method of the focusing mirror in the pump source uses reverse red light pumping to adjust the size of the light spot to achieve the coupling of the focusing mirror. With the continuous development of laser technology, higher requirements are put forward for the coupling efficiency and stability of the focusing mirror. However, reverse red light pumping affects the coupling efficiency and stability of the focusing mirror due to its complex adjustment mechanism, instability of coupling efficiency, vulnerability of red light pumping, and limitation of application scope.

[0003] This solution proposes a new pump coupling method and a coupling device. By keeping a fixed distance between the center point of the exit surface of the focusing mirror and the center point of the fiber end face, this fixed distance is accurately calculated according to the focusing characteristics of the laser beam and the fiber transmission characteristics, and the exit surface of the focusing mirror and the fiber end face need to be kept parallel to ensure that the pump light can be efficiently coupled into the fiber. During the coupling process, the pump light first undergoes the focusing effect of the focusing mirror to form a small and concentrated light spot. Then, this light spot irradiates the fiber end face at a fixed distance, and the pump light is coupled into the fiber through the fiber transmission characteristics. Since the distance between the focusing mirror and the fiber end face is fixed, it can ensure that the size and position of the pump light spot are consistent each time of coupling, thus improving the coupling efficiency and stability. Summary of the Invention

[0004] The purpose of the present invention is to provide a focusing mirror coupling method and a coupling device to solve the technical problems of low coupling efficiency, poor stability, and narrow application range of the focusing mirror in the current pump source, improve the coupling efficiency and stability of the focusing mirror, and fully consider the characteristics of the planar structure of the exit surface of the focusing mirror and the fiber coupling entrance end face in the fiber, further improving the coupling accuracy and the output performance of the laser.

[0005] In a first aspect, the present invention provides a focusing mirror coupling method for coupling the focusing mirror to a pump source housing, and there is a fiber inside the pump source housing. The method includes:

[0006] Obtaining the position information of the fiber end face of the fiber through the slot of the pump source housing;

[0007] Setting the focusing mirror at an initial position inside the pump source housing;

[0008] Based on the initial position of the focusing mirror, the preset relationship between the fiber end face and the output surface of the focusing mirror, and the position information of the fiber end face, determine the target position of the focusing mirror inside the pump source housing, and adjust the focusing mirror to the target position.

[0009] Further, obtaining the position information of the fiber end face through the slot on the pump source housing includes: the slot is arranged on the top surface of the pump source housing along the extension direction perpendicular to the side surface of the pump source housing, so as to obtain the position information of the fiber end face by transmitting light through the slot.

[0010] Further, the initial position includes: the deflection angle of the focusing mirror is 0°, and the deflection angle includes the angle between the focusing mirror and the side surface of the pump source housing.

[0011] Further, the preset relationship includes: the fixed distance between the center point of the fiber end face and the center point of the output surface of the focusing mirror is D, and the fiber end face is parallel to the output surface of the focusing mirror.

[0012] Further, based on the initial position of the focusing mirror, the preset relationship between the fiber end face and the output surface of the focusing mirror, and the position information of the fiber end face, determining the target position of the focusing mirror placed inside the pump source housing includes:

[0013] If the position information of the fiber end face is two-dimensional coordinate information, obtain the coordinate position of the center point of the fiber end face and the coordinate positions of at least two first sampling points on the contour of the fiber end face, and obtain the coordinate position of the center point of the output surface of the focusing mirror and the coordinate positions of at least two second sampling points on the contour of the output surface of the focusing mirror.

[0014] Further, based on the initial position of the focusing mirror, the preset relationship between the fiber end face and the output surface of the focusing mirror, and the position information of the fiber end face, determining the target position of the focusing mirror set inside the pump source housing includes:

[0015] The length of the output surface of the focusing mirror along the Y-axis direction is L, the length of the output surface of the focusing mirror along the direction perpendicular to the pump source plane is W, and the fixed distance between the center point of the fiber end face and the center point of the output surface of the focusing mirror is D;

[0016] The coordinates of the center point of the fiber end face are C(Cx, Cy), and the coordinates of the center point of the output surface of the focusing mirror are R(Rx, Ry), where Rx = Cx ± D and Ry = Cy;

[0017] The coordinates of two first sampling points on the contour of the fiber end face are P1(x1, y1) and P2(x2, y2) respectively;

[0018] If Cx = x1 = x2, then the end face of the optical fiber has no tilt, and the tilt angle θ = 0;

[0019] If Cx ≠ x1 and / or Cx ≠ x2, then the end face of the optical fiber is tilted, and the tilt angle is

[0020] ,

[0021] Where: ;

[0022] Based on the tilt angle, the coordinates of the four corners of the exit surface of the focusing lens are determined as follows:

[0023] M1(Rx + sin(θ), Ry - cos(θ)),

[0024] M2(Rx + sin(θ), Ry - cos(θ)),

[0025] M3(Rx - sin(θ), Ry + cos(θ)),

[0026] M4(Rx - sin(θ), Ry + cos(θ)).

[0027] Furthermore, based on the initial position of the focusing lens, the preset relationship between the end face of the optical fiber and the exit surface of the focusing lens, and the position information of the end face of the optical fiber, determining the target position of the focusing lens placed inside the pump source housing includes:

[0028] If the position information of the end face of the optical fiber is three-dimensional coordinate information, obtain the coordinate position of the center point of the end face of the optical fiber and the coordinate positions of at least one first sampling point on the contour of the end face of the optical fiber, and obtain the coordinate position of the center point of the exit surface of the focusing lens and the coordinate positions of at least one second sampling point on the contour of the exit surface of the focusing lens.

[0029] Furthermore, based on the initial position of the focusing lens, the preset relationship between the end face of the optical fiber and the exit surface of the focusing lens, and the position information of the end face of the optical fiber, determine the target position of the focusing lens set inside the pump source housing:

[0030] The length of the exit surface of the focusing lens along the Y-axis is L, the length of the exit surface of the focusing lens along the Z-axis is W, and the distance between the center point of the end face of the optical fiber and the center point of the exit surface of the focusing lens is D;

[0031] The center point coordinates of the fiber optic end face are C(Cx, Cy, Cz), and the center point coordinates of the output surface of the focusing lens are R(Rx, Ry, Rz), where Rx = Cx ± D, Ry = Cy, and Rz = Cz;

[0032] The coordinates of a first sampling point P3(x3, y3, z3) on the contour of the fiber optic end face;

[0033] If Cx = x3, then the fiber optic end face has no tilt and θ = 0;

[0034] If Cx ≠ x3, then the fiber optic end face is tilted, and the tilt angle of the fiber optic end face is determined to be θ = arctan( ),

[0035] where: = ;

[0036] (CP3)z is the projection length of the distance CP3 between the center point of the fiber optic end face and the first sampling point on the contour of the fiber optic end face on the Z-axis,

[0037] (CP3)x is the projection length of the distance CP3 between the center point of the fiber optic end face and the first sampling point on the contour of the fiber optic end face on the X-axis,

[0038] (CP3)y is the projection length of the distance CP3 between the center point of the fiber optic end face and the first sampling point on the contour of the fiber optic end face on the Y-axis;

[0039] Based on the tilt angle, the coordinates of the four corners of the output surface of the focusing lens are determined as follows:

[0040] M1(Rx + sin(θ), Ry - cos(θ), Rz + ),

[0041] M2(Rx + sin(θ), Ry - cos(θ), Rz - ),

[0042] M3(Rx - sin(θ), Ry + cos(θ), Rz - ),

[0043] M4(Rx - sin(θ), Ry + cos(θ), Rz + ).

[0044] In a second aspect, the present invention provides a focusing lens coupling device, comprising an identification system, a moving and grasping system, and a carrying system;

[0045] The carrying system includes a tray and a pump source carrying mechanism. The tray is provided with a receptacle for the focusing lens, and the pump source carrying mechanism is used to carry the pump source housing. A slotted opening is provided on the pump source housing;

[0046] The identification system includes a first image recognition system and a second image recognition system. The second image recognition system is disposed between the pump source carrying mechanism and the tray for obtaining the posture of the focusing lens after the moving and grasping system grasps the focusing lens. The first image recognition system is movably disposed above the pump source housing for obtaining the position information of the focusing lens disposed inside the pump source housing and the position information of the optical fiber end face disposed inside the pump source housing;

[0047] The moving and grasping system is movably disposed on a slide rail for grasping the focusing lens in the tray and then setting the focusing lens at a target position on the pump source housing.

[0048] In another aspect, the present invention provides a focusing lens coupling device, comprising an identification system, a moving and grasping system, a turning mirror, and a carrying system;

[0049] The carrying system includes a tray and a pump source carrying mechanism. The tray is provided with a receptacle for the focusing lens, and the pump source carrying mechanism is used to carry the pump source housing. A slotted opening is provided on the pump source housing;

[0050] The identification system includes a first image recognition system and a second image recognition system. The second image recognition system is disposed between the pump source carrying mechanism and the tray for obtaining the posture of the focusing lens after the moving and grasping system grasps the focusing lens. The first image recognition system is movably disposed above the pump source housing for obtaining the position information of the focusing lens disposed inside the pump source housing and the position information of the optical fiber end face of the optical fiber disposed inside the pump source housing;

[0051] The moving and grasping system is movably disposed on a slide rail for grasping the focusing lens in the tray and then setting the focusing lens at a target position on the pump source housing;

[0052] The turning mirror is disposed above the pump source housing for obtaining the position information of the optical fiber end face and the position information of the focusing lens disposed inside the pump source housing;

[0053] Wherein, the turning mirror includes a bracket and a mirror surface fixed on the bracket. The optical fiber position information and the position information of the focusing lens are reflected by the mirror surface and then incident on the first image recognition system.

[0054] The present invention has at least the following advantages or beneficial effects:

[0055] The present invention provides a focusing lens coupling method and a coupling device. First, a first image recognition system accurately recognizes the position information of the fiber end face through the slot of the pump source housing, including the center point coordinates of the fiber end face and the up-sampling point coordinates on the contour. The focusing lens is set at the initial position inside the pump source housing. The control system calculates the accurate position of the focusing lens according to the fixed distance between the center point of the fiber end face and the center point of the exit surface of the focusing lens, and the preset relationship between the fiber end face and the exit surface of the focusing lens, and precisely adjusts the position of the focusing lens to couple the focusing lens to the target position. The present invention improves the coupling efficiency and coupling accuracy. When the fiber is tilted, it can automatically detect and adjust the position and angle of the focusing lens to ensure that the light can be accurately coupled into the fiber, improving the laser output characteristics of the pump source. Description of the Drawings

[0056] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 Partial schematic diagram of the focusing lens coupling device;

[0058] Figure 2 Schematic diagram of the pump source on the coupling device;

[0059] Figure 3 Schematic diagram of the focusing lens coupling device;

[0060] Figure 4 Schematic diagram of the structure of the focusing lens and the fiber;

[0061] Figure 5 Schematic diagram of the installation position relationship between the turning mirror and the fiber.

[0062] 11 - Pump source; 12 - Slot; 13 - Focusing lens; 14 - Fiber; 21 - First image recognition system; 22 - Second image recognition system; 23 - Mobile grasping system; 24 - UV ultraviolet glue dispenser; 25 - UV ultraviolet glue curing machine; 26 - Turning mirror; 261 - Bracket; 262 - Mirror surface. Detailed Embodiments

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific implementations in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0064] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0065] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0066] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0067] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0068] The embodiments of the present application solve the technical problems of low coupling efficiency, poor stability, and narrow application range of the coupling focusing lens in the prior art by providing a coupling method for a new type of focusing lens.

[0069] Embodiment 1, the present invention provides a coupling method and a coupling device for a focusing lens, which are used to couple the focusing lens to a pump source housing. An optical fiber is arranged inside the pump source housing, and the coupling device is as Figure 1 , Figure 2 ,Figure 3 As shown in the figure, a coupling method for a focusing lens includes:

[0070] S1: The first image recognition system 21 obtains the position information of the end face of the optical fiber 14 through the slot 12 on the housing of the pump source 11.

[0071] S2: The mobile grasping system 23 grasps the focusing lens 13 in the tray and places the focusing lens 13 at the initial position inside the housing of the pump source 11.

[0072] S3: Based on the initial position of the focusing lens 13, the preset relationship between the end face of the optical fiber 14 and the focusing lens exit surface of the focusing lens 13, and the position information of the end face of the optical fiber 14, determine the target position of the focusing lens 13 arranged inside the housing of the pump source 11, and adjust the focusing lens 13 to the target position.

[0073] Step S1 includes: Step S11: A slot 12 is arranged in the direction perpendicular to the surface of the housing at the position of the end face of the optical fiber 14 corresponding to the housing of the pump source 11; the slot 12 is arranged on the top surface of the housing of the pump source 11 along the extending direction perpendicular to the side surface of the housing of the pump source 11, so as to obtain the position information of the optical fiber end face after transmitting light through the slot 12. Since the optical fiber is currently hidden inside the housing to avoid possible contamination introduced during the manufacturing process, in this embodiment, in order to enable the first image recognition system 21 to observe and locate the position of the end face of the optical fiber 14, a slot 12 is arranged on the surface of the housing of the pump source 11 corresponding to the end face of the optical fiber 14, as Figure 2 shown. And a transparent material is arranged on the slot 12 to seal the notch of the slot 12, preventing the introduction of dirt during the manufacturing process and causing contaminants to deposit on the surface of the optical fiber.

[0074] Step S2 includes: Step S21: The mobile grasping system 23 grasps the focusing lens 13 in the tray, and the second image recognition system 22 obtains the grasping posture of the focusing lens 13 and adjusts the grasping posture of the focusing lens 13.

[0075] Step S22: Place the focusing lens 13 inside the housing of the pump source 11, the first image recognition system 21 obtains the position of the focusing lens, and the control system adjusts the focusing lens 13 to the initial position. The deflection angle of the focusing lens 13 at the initial position is 0°, and the deflection angle includes the angle between the focusing lens and the side surface of the pump source housing.

[0076] In step S22, the control system can adjust the XYZ axes, yaw axis, and pitch axis of the mobile grasping system 23 to make the deflection angle of the focusing lens 0°.

[0077] When the focusing lens 13 is coupled, it is necessary to further accurately adjust the coupling position of the focusing lens 13. When there is no deflection angle of the focusing lens 13, it is beneficial for the subsequent control system to calculate the position where the focusing lens 13 needs to be placed according to the position information of the end face of the optical fiber 14, and it is beneficial for the subsequent mobile grasping system 23 to accurately place the focusing lens 13 at the coupling position, thereby improving the coupling accuracy of the focusing lens.

[0078] The preset relationship between the end face of the optical fiber 14 and the exit surface of the focusing lens 13 in step S3 means that the fixed distance between the center point of the optical fiber end face and the center point of the focusing lens exit surface is D, and the optical fiber end face is parallel to the focusing lens exit surface, as Figure 4 shown. That is, when the fixed distance between the center point of the optical fiber end face and the center point of the focusing lens exit surface is known, the coordinate position of the focusing lens exit surface is determined in combination with the position information of the optical fiber end face, so that the optical fiber end face and the focusing lens exit surface are set in parallel.

[0079] Among them, the fixed distance D between the center point of the end face of the optical fiber 14 and the center point of the exit surface of the focusing lens 13 is determined according to the focusing characteristics of the laser beam and the transmission characteristics of the optical fiber.

[0080] The area of the end face of the optical fiber 14 is small, but when the optical fiber 14 is fixed on the shell of the pump source 11, the optical fiber 14 may be inclined due to the process. If the optical fiber 14 is inclined, the light emitted by the focusing lens 13 may not be smoothly coupled into the optical fiber 14. In order to improve the coupling accuracy and laser output characteristics, it is necessary to consider whether the optical fiber 14 is inclined.

[0081] In addition, it needs to be further explained that affected by the fixed structure of the output end of the optical fiber 14, the inclination of the end face of the optical fiber 14 is a left-right inclination, that is, it deflects along the direction perpendicular to the surface of the pump source.

[0082] The coordinate system is as Figure 2 shown, where the lower left corner of the pump source is used as the coordinate origin to establish a coordinate system, where the long side of the pump source is the X axis, the short side is the Y axis, and the direction perpendicular to the pump source is the Z axis.

[0083] The first image recognition system 21 is composed of a CCD lens. When the CCD lens recognizes the position information, it can only recognize two-dimensional plane position information. Therefore, the position information of the end face of the optical fiber 14 obtained by the first image recognition system 21 is two-dimensional coordinate information, that is, it can only recognize the coordinate information in the X-axis and Y-axis directions. The position information of the end face of the optical fiber 14 includes the coordinate position of the center point of the end face of the optical fiber 14 and the coordinate information of at least two first sampling points on the contour of the end face of the optical fiber 14. Obtain the coordinate position of the center point of the exit surface of the focusing lens at the initial position, and the coordinate positions of at least two second sampling points on the contour of the exit surface of the focusing lens. As Figure 4 shown;

[0084] Among them, the first image recognition system 21 recognizes the central point coordinates of the optical fiber end face according to feature matching. The control system can calculate the coordinate information where the central point of the exit surface of the focusing lens 13 needs to be coupled and placed based on the fixed distance between the central point of the optical fiber 14 end face and the central point of the exit surface of the focusing lens 13.

[0085] Recognizing the coordinate information of at least two first sampling points on the contour of the optical fiber 14 end face can combine with the central point of the optical fiber 14 end face to calculate whether the optical fiber 14 end face is tilted.

[0086] In step S3, based on the position information of the focusing lens at the initial position, the preset relationship between the optical fiber end face and the exit surface of the focusing lens, and the optical fiber end face position information, determine the target position of the focusing lens set inside the pump source housing, including:

[0087] The length of the exit surface of the focusing lens 13 along the Y-axis direction is L, the length of the exit surface of the focusing lens perpendicular to the direction of the pump source is W, and the fixed distance between the central point of the optical fiber end face and the central point of the exit surface of the focusing lens is D;

[0088] The coordinates of the central point of the optical fiber 14 end face are C(Cx, Cy), and the coordinates of the central point of the exit surface of the focusing lens are R(Rx, Ry), where Rx = Cx ± D and Ry = Cy;

[0089] The coordinates of two first sampling points on the contour of the optical fiber end face are P1(x1, y1) and P2(x2, y2) respectively;

[0090] If Cx = x1 = x2, the optical fiber end face has no tilt and the tilt angle θ = 0;

[0091] If Cx ≠ x1 and / or Cx ≠ x2, the optical fiber end face is tilted, and calculate the tilt angle of the optical fiber end face as ,

[0092] Among them: ,

[0093] Based on the tilt angle θ, determine that the coordinates of the four corners of the exit surface of the focusing lens are respectively:

[0094] M1(Rx + sin(θ), Ry - cos(θ))、

[0095] M2(Rx + sin(θ), Ry - cos(θ))、

[0096] M3(Rx - sin(θ), Ry + cos(θ))、

[0097] M4(Rx - sin(θ), Ry + cos(θ)).

[0098] The calculation method for determining the coordinates of the four corners of the exit surface of the focusing lens is as follows:

[0099] For the exit surface with the tilt angle θ = 0, the coordinates of the four corners are M1(Rx, Ry - ), M2(Rx, Ry - ), M3(Rx, Ry + ), M4(Rx, Ry + );

[0100] When the tilt angle θ ≠ 0,

[0101] = +

[0102] (X´, Y´) are the coordinates of the four corners of the exit surface with the tilt angle θ, and (X, Y) are the coordinates of the four corners of the exit surface with the tilt angle θ = 0.

[0103] Subsequently, the first image recognition system 21 recognizes the position information of the focusing lens 13 again, and cooperates with the mobile grasping system 23 to precisely adjust the position of the focusing lens 13 again.

[0104] Embodiment 2. Since the area of the end face of the optical fiber 14 is small, the first image recognition system 21 requires high recognition accuracy when recognizing the coordinate information of the first sampling points on the contour of the end face of the optical fiber. To improve the coupling accuracy, a folding mirror 26 is introduced into the coupling device of the focusing lens 13.

[0105] The folding mirror 26 can project the plane information of the end face of the optical fiber 14 and the exit surface of the focusing lens 13 perpendicular to the surface of the pump source 11 housing in a folded manner into the first image recognition system 21. Therefore, the first image recognition system 21 can recognize the coordinate information in the vertical direction. Thus, the position information of the end face of the optical fiber 14 obtained by the first image recognition system 21 is two-dimensional coordinate information, that is, with the help of the folding mirror 26, the first image recognition system 21 can recognize the coordinate information in the X-axis, Y-axis, and Z-axis directions, that is, the first image recognition system 21 can grasp the three-dimensional coordinate information with the help of the folding mirror 26.

[0106] Therefore, the position information of the end face of the optical fiber obtained by the first image recognition system is three-dimensional coordinate information. The position information of the end face of the optical fiber includes the coordinate position of the center point of the end face of the optical fiber and the coordinate information of at least one first sampling point on the contour of the end face of the optical fiber. Obtain the coordinate position of the center point of the exit surface of the focusing lens at the initial position and the coordinate position of at least one second sampling point on the contour of the exit surface of the focusing lens.

[0107] In step S3, based on the position information of the focusing lens at the initial position, the preset relationship between the optical fiber end face and the exit surface of the focusing lens, and the position information of the optical fiber end face, determine the target position of the focusing lens disposed inside the pump source housing, including:

[0108] The length of the exit surface of the focusing lens along the Y-axis is L, the length of the exit surface of the focusing lens along the Z-axis is W, and the fixed distance between the center point of the optical fiber end face and the center point of the exit surface of the focusing lens is D;

[0109] The center point coordinates of the optical fiber end face are C (Cx, Cy, Cz), and the center point coordinates of the exit surface of the focusing lens are R (Rx, Ry, Rz), where Rx = Cx ± D, Ry = Cy, Rz = Cz;

[0110] The coordinates of a first sampling point P3 (x3, y3, z3) on the contour of the optical fiber end face;

[0111] If Cx = x3, the optical fiber end face has no tilt, θ = 0;

[0112] If Cx ≠ x3, the optical fiber end face is tilted, and the tilt angle of the optical fiber end face is determined to be θ = arctan( ),

[0113] Where: = ;

[0114] (CP3)z is the projection length of the distance CP3 between the center point of the optical fiber end face and the first sampling point on the contour of the optical fiber end face on the Z-axis,

[0115] (CP3)x is the projection length of the distance CP3 between the center point of the optical fiber end face and the first sampling point on the end face contour on the x-axis,

[0116] (CP3)y is the projection length of the distance CP3 between the center point of the optical fiber end face and the first sampling point on the contour of the optical fiber end face on the Y-axis;

[0117] Based on the tilt angle θ, determine the coordinates of the four corners of the exit surface of the focusing lens as:

[0118] M1(Rx + sin(θ), Ry - cos(θ), Rz + ),

[0119] M2(Rx + sin(θ), Ry - cos(θ), Rz - ),

[0120] M3(Rx - sin(θ), Ry + cos(θ), Rz - )、

[0121] M4(Rx - sin(θ), Ry + cos(θ), Rz + )。

[0122] The calculation method for determining the coordinates of the four corners of the exit surface of the focusing lens is as follows:

[0123] The coordinates of the four corners of the exit surface with the tilt angle θ = 0 of the fiber end face are respectively M1(Rx, Ry - , Rz + ), M2(Rx, Ry - , Rz + ), M3(Rx, Ry + , Rz + ), M4(Rx, Ry + , Rz + );

[0124] When the tilt angle θ ≠ 0,

[0125] = +

[0126] (X´, Y´, Z’) are the coordinates of the four corners of the exit surface with the tilt angle θ, and (X, Y, Z) are the coordinates of the four corners of the exit surface with the tilt angle θ = 0.

[0127] Subsequently, the folding mirror 26 is placed on one side of the exit surface of the focusing lens 13 in the housing of the pump source 11, and the first image recognition system 21 recognizes the position information of the focusing lens 13 again, and cooperates with the moving and grasping system 23 to accurately adjust the position of the focusing lens 13 again.

[0128] After adjusting the focusing lens to the target position, use the UV ultraviolet glue dispenser 24 for UV ultraviolet glue bonding; use the UV ultraviolet glue curing machine 25 for UV glue curing.

[0129] It should be understood that in this application, the center point of the fiber end face and the center point of the exit surface of the focusing lens are on the same horizontal line, and the fixed distance D between the center point of the fiber end face and the center point of the exit surface of the focusing lens is the horizontal distance; when the center point of the fiber end face and the center point of the exit surface of the focusing lens are not on the same horizontal line, the fixed distance D between the center point of the fiber end face and the center point of the exit surface of the focusing lens can be calculated according to the horizontal distance between the exit surface of the focusing lens and the fiber end face and trigonometric functions.

[0130] On the other hand, in the third embodiment of the present invention, a focusing lens coupling device is provided, including: an identification system, a moving and grasping system, and a carrying system;

[0131] The carrying system includes a tray for arranging a cartridge capable of accommodating a focusing lens and a pump source carrying structure, and a slotted opening is provided on the pump source housing;

[0132] The identification system includes a first image recognition system 21 and a second image recognition system 22. The second image recognition system 22 is arranged between the pump source carrying mechanism and the tray for obtaining the attitude of the focusing lens in the moving and grasping system 23. The first image recognition system 21 is movably arranged above the housing of the pump source 11 for obtaining the position information of the focusing lens arranged inside the housing of the pump source 11 and the position information of the fiber end face of the optical fiber arranged inside the housing of the pump source;

[0133] The moving and grasping system 23 is movably arranged above the pump source carrying structure for grasping the focusing lens in the tray and then arranging the focusing lens at the target position of the pump source housing.

[0134] In the fourth embodiment of this case, a focusing lens coupling device includes an identification system, a moving and grasping system, a turning mirror, and a carrying system;

[0135] The carrying system includes a tray for arranging a cartridge capable of accommodating a focusing lens and a pump source carrying structure, and a slotted opening is provided on the pump source housing;

[0136] The identification system includes a first image recognition system 21 and a second image recognition system 22. The second image recognition system 22 is arranged between the pump source carrying mechanism and the tray for obtaining the attitude of the focusing lens in the moving and grasping system 23. The first image recognition system 21 is movably arranged above the housing of the pump source 11 for obtaining the position information of the focusing lens arranged inside the housing of the pump source 11 and the position information of the fiber end face of the optical fiber arranged inside the housing of the pump source;

[0137] The turning mirror 26 is arranged above the pump source housing for obtaining the position information of the fiber end face and the position information of the focusing lens arranged inside the pump source housing;

[0138] Among them, as Figure 5 shown, the turning mirror 26 includes a bracket 261 and a mirror surface 262 fixed on the bracket. The fiber position information and the position information of the focusing lens are reflected by the mirror surface 262 and then incident on the first image recognition system 21. The bracket 261 of the turning mirror 26 includes an XYZ axis adjustment structure and a yaw and pitch adjustment structure, which can be used to adjust the position of the turning mirror 26.

[0139] The further focusing lens coupling device further includes: a UV ultraviolet glue dispenser 24 for bonding the focusing lens to a target position of the pump source housing using UV ultraviolet glue; a UV ultraviolet glue curing machine 25 for fixing the UV ultraviolet glue after the UV ultraviolet glue dispenser 24 bonds the focusing lens to the target position of the pump source housing with the UV ultraviolet glue.

[0140] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A focusing mirror coupling method, characterized in that: The method is used to couple the focusing mirror to a pump source shell, wherein an optical fiber is arranged inside the pump source shell, and the method comprises: Obtaining the optical fiber end face position information of the optical fiber through the groove of the pump source tube shell; Setting the focusing mirror at an initial position inside the pump source shell; Based on the initial position of the focusing mirror, the preset relationship between the optical fiber end face and the focusing mirror exit surface of the focusing mirror, and the optical fiber end face position information, determine the target position of the focusing mirror inside the pump source tube shell, and adjust the focusing mirror to the target position; The initial position includes: the deflection angle of the focusing mirror is 0°, and the deflection angle includes the angle between the exit surface of the focusing mirror and the side surface of the pump source shell; The preset relationship includes: a fixed distance D between the center point of the optical fiber end face and the center point of the focusing mirror exit surface, and the optical fiber end face is parallel to the focusing mirror exit surface.

2. The focusing mirror coupling method according to claim 1, characterized in that: The optical fiber end face position information is obtained through the groove of the pump source shell, including: The slot is arranged on the top surface of the pump source shell along an extending direction perpendicular to the side surface of the pump source shell, so as to obtain the optical fiber end surface position information of the optical fiber by transmitting light through the slot.

3. The focusing mirror coupling method according to claim 1, characterized in that: Based on the initial position of the focusing mirror, the preset relationship between the optical fiber end face and the exit surface of the focusing mirror, and the position information of the optical fiber end face, determining the target position of the focusing mirror inside the pump source shell, comprising: If the position information of the optical fiber end face is two-dimensional coordinate information, the coordinate position of the center point of the optical fiber end face and the coordinate positions of at least two first sampling points on the contour of the optical fiber end face are obtained, and the coordinate position of the center point of the exit surface of the focusing mirror and the coordinate positions of at least two second sampling points on the contour of the exit surface of the focusing mirror are obtained.

4. The focusing mirror coupling method according to claim 3, characterized in that: Based on the initial position of the focusing mirror, the preset relationship between the optical fiber end face and the focusing mirror exit surface of the focusing mirror, and the optical fiber end face position information, determining the target position of the focusing mirror inside the pump source tube shell, including: The length of the focusing mirror exit surface along the Y-axis direction is L, the length of the focusing mirror exit surface along the direction perpendicular to the pump source plane is W, and the fixed distance between the center point of the optical fiber end face and the center point of the focusing mirror exit surface is D; Take the lower left corner of the pump source as the origin and establish a coordinate system, where the long side of the pump source is the X-axis and the short side is the Y-axis; The coordinates of the center point of the optical fiber end face are C (Cx, Cy), and the coordinates of the center point of the focusing mirror exit surface are R (Rx, Ry), where Rx = Cx ± D, Ry = Cy; The coordinates of the two first sampling points on the contour of the optical fiber end face are P1(x1,y1) and P2(x2,y2); If Cx=x1=x2, the optical fiber end face has no tilt, and the tilt angle θ=0; If Cx≠x1 and / or Cx≠x2, the optical fiber end face is tilted, and the tilt angle is , in: ; The focusing mirror exit surface is a quadrilateral structure, and the four corners of the focusing mirror exit surface are the four vertices of the quadrilateral structure. Based on the tilt angle, the coordinates of the four corners of the focusing mirror exit surface are determined as follows: M1(Rx+ sin(θ), Ry- cos(θ))、 M2(Rx+ sin(θ), Ry- cos(θ))、 M3(Rx- sin(θ), Ry+ cos(θ))、 M4(Rx- sin(θ), Ry+ cos(θ)).

5. The focusing mirror coupling method according to claim 1, characterized in that: Based on the initial position of the focusing mirror, the preset relationship between the optical fiber end face and the exit surface of the focusing mirror, and the position information of the optical fiber end face, determining the target position of the focusing mirror inside the pump source shell, comprising: If the position information of the optical fiber end face is three-dimensional coordinate information, the coordinate position of the center point of the optical fiber end face and the coordinate position of at least one first sampling point on the contour of the optical fiber end face are obtained, and the coordinate position of the center point of the focusing mirror exit surface and the coordinate position of at least one second sampling point on the contour of the focusing mirror exit surface are obtained.

6. The focusing mirror coupling method according to claim 5, characterized in that: Based on the initial position of the focusing mirror, the preset relationship between the optical fiber end face and the exit surface of the focusing mirror, and the position information of the optical fiber end face, the target position of the focusing mirror inside the pump source shell is determined: The length of the focusing mirror exit surface along the Y-axis direction is L, the length of the focusing mirror exit surface along the Z-axis direction is W, and the distance between the center point of the optical fiber end face and the center point of the focusing mirror exit surface is D; Take the lower left corner of the pump source as the origin and establish a coordinate system, where the long side of the pump source is the X-axis, the short side is the Y-axis, and the direction perpendicular to the pump source is the Z-axis; The center point coordinates of the optical fiber end face are C (Cx, Cy, Cz), and the center point coordinates of the focusing mirror exit surface are R (Rx, Ry, Rz), where Rx = Cx ± D, Ry = Cy, Rz = Cz; A first sampling point coordinate P3 (x3, y3, z3) on the optical fiber end face profile; If Cx = x3, the optical fiber end face has no tilt, θ = 0; If Cx≠x3, the optical fiber end face is tilted, and the tilt angle of the optical fiber end face is determined to be θ=arctan( ), in: = ; (CP3)z is the projection length of the distance CP3 between the center point of the optical fiber end face and the first sampling point on the optical fiber end face profile on the Z axis, (CP3)x is the projection length of the distance CP3 between the center point of the optical fiber end face and the first sampling point on the optical fiber end face profile on the x-axis, (CP3)y is the projection length of the distance CP3 between the center point of the optical fiber end face and the first sampling point on the profile of the optical fiber end face on the Y axis; The focusing mirror exit surface is a quadrilateral structure, and the four corners of the focusing mirror exit surface are the four vertices of the quadrilateral structure. Based on the tilt angle, the coordinates of the four corners of the focusing mirror exit surface are determined as follows: M1(Rx+ sin(θ), Ry- cos(θ),Rz+ )、 M2(Rx+ sin(θ), Ry- cos(θ),Rz- )、 M3(Rx- sin(θ), Ry+ cos(θ),Rz- )、 M4(Rx- sin(θ), Ry+ cos(θ),Rz+ )。 7. A focusing mirror coupling device, characterized in that: The device can implement the focusing mirror coupling method described in any one of claims 1 to 4 or 6, and includes an identification system, a mobile grasping system, and a carrying system; The carrying system comprises a material tray and a pump source carrying mechanism, the material tray is provided with a focusing lens, the pump source carrying mechanism is used to carry a pump source shell, and the pump source shell is provided with a slot; The recognition system includes a first image recognition system and a second image recognition system. The second image recognition system is disposed between the pump source carrying mechanism and the material tray to obtain and recognize the posture of the focusing mirror after the mobile grasping system grasps the focusing mirror. The first image recognition system can be movably disposed above the pump source tube shell to obtain the position information of the focusing mirror disposed inside the pump source tube shell and the position information of the optical fiber end face disposed inside the pump source tube shell. The mobile grabbing system can be movably arranged on the slide rail, so as to grab the focusing mirror in the material tray and then arrange the focusing mirror at a target position of the pump source tube shell.

8. A focusing mirror coupling device, characterized in that: The device can implement the focusing mirror coupling method described in any one of claims 1-2 or any one of claims 5-6, including an identification system, a mobile grasping system, a turning mirror and a carrying system; The carrying system comprises a material tray and a pump source carrying mechanism, the material tray is provided with a focusing lens, the pump source carrying mechanism is used to carry a pump source shell, and the pump source shell is provided with a slot; The recognition system includes a first image recognition system and a second image recognition system. The second image recognition system is disposed between the pump source carrying mechanism and the material tray to obtain and recognize the posture of the focusing mirror after the mobile grasping system grasps the focusing mirror. The first image recognition system can be movably disposed above the pump source tube shell to obtain the position information of the focusing mirror disposed inside the pump source tube shell and the position information of the optical fiber end face of the optical fiber disposed inside the pump source tube shell. The mobile grabbing system can be movably arranged on the slide rail, so as to grab the focusing mirror in the material tray and then arrange the focusing mirror at the target position of the pump source shell; The deflection mirror is arranged above the pump source shell to obtain the position information of the optical fiber end face and the position information of the focusing mirror arranged inside the pump source shell; The deflection mirror includes a bracket and a mirror surface fixed on the bracket, and the optical fiber position information and the focusing mirror position information are reflected by the mirror surface and then incident on the first image recognition system.

Images