Device and method for coupling light output angle

Abstract

The present application discloses a device and method for coupling light output angles, and relates to the field of optical technology. The method for coupling light output angles includes: visually identifying a light-emitting device, and moving the light-emitting device to a first preset position on a stage, and placing it at a first preset angle; transferring the light-emitting device to a rod stage, so that the light output port of the light-emitting device and a beam analyzer are on the same axis; visually identifying a lens, and moving the lens to a second preset position on the stage, and placing it at a second preset angle; moving the lens to a position relative to the light output port, so that the light spot is incident into the field of view of the beam analyzer; adjusting the position of the lens relative to the light-emitting device according to the deviation value between the light spot and the reference position of the beam analyzer. It can improve the yield rate of coupling and reduce the time consumed by coupling.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a device and a coupling method for light output angle coupling. Background Art

[0002] In the application of fiber optic communication technology, it is first necessary to convert the electrical signal into an optical signal through a light-emitting device (such as a semiconductor laser), and then couple the optical signal into an optical fiber that transmits the optical signal or a planar optical waveguide (such as a thin film optical waveguide or a strip optical waveguide) that modulates the optical signal.

[0003] At present, when coupling the light-emitting device with the lens, the position of the lens and the light-emitting device is generally identified by a camera, and the position of the lens and the light-emitting device after being aligned is recorded by visual recognition. Then, the light-emitting device and the lens are sucked from the recorded position to the rod table respectively, and the light-emitting device and the lens are pressed together until the pressure is zero, and then lifted to a certain height to reserve the glue dispensing thickness, and the light-emitting surface of the light-emitting device is glued, and the lens returns to the position parallel to the plane of the light-emitting surface of the light-emitting device before glue dispensing, and the position of the lens is calibrated by visual recognition, and returned to the height position before glue dispensing, and the bonding material is baked, and the finished material is unloaded to the unloading tray.

[0004] The light output angle value of the finished material made by the above method cannot be monitored all the time, and the position must be repeatedly fine-tuned through visual recognition during mounting, which makes the mounting yield low and time-consuming. Summary of the invention

[0005] The purpose of the present application is to provide a device and a coupling method for light output angle coupling, which can improve the coupling yield and reduce the coupling consumption time.

[0006] The embodiment of the present application is implemented as follows:

[0007] In one aspect of an embodiment of the present application, a method for coupling a light output angle is provided, the method comprising:

[0008] Identify the light-emitting device by vision, and move the light-emitting device to a first preset position on the stage and place it at a first preset angle;

[0009] Transferring the light emitting device to a rod stand so that the light outlet of the light emitting device is on the same axis as the beam profiler;

[0010] Identify the lens through vision, and move the lens to a second preset position on the stage and place it at a second preset angle;

[0011] Moving the lens to a position relative to the light outlet so that the light spot is incident into the field of view of the beam profiler;

[0012] The position of the lens relative to the light emitting device is adjusted according to the deviation value between the light spot and the reference position of the beam profiler.

[0013] Optionally, adjusting the position of the lens relative to the light emitting device according to the deviation value between the light spot and a reference position of the light beam profiler comprises:

[0014] In a single field state, moving the light spot to within a preset range around the reference position;

[0015] Through far-field and near-field debugging, the light output angle of the lens is adjusted to a preset state.

[0016] Optionally, in the single field state, moving the light spot to a preset range around the reference position includes:

[0017] Determine the X-direction deviation value ΔX between the current spot position and the reference position, and if ΔX is greater than 0, move the lens in the negative direction of the X-direction, otherwise move it in the positive direction;

[0018] Determine the Y-direction deviation ΔY between the current spot position and the reference position, and if ΔX is greater than 0, move the lens in the negative direction of the Y direction, otherwise move it in the positive direction;

[0019] The X direction and the Y direction are two directions perpendicular to each other.

[0020] Optionally, if ΔX is greater than 0, causing the lens to move in the negative direction of the X direction includes:

[0021] Determine the distance of a single move according to the size of ΔX;

[0022] If ΔX is greater than 0, the lens is moved in the negative direction of the Y direction, including:

[0023] The distance of a single move is determined according to the size of ΔY.

[0024] Optionally, when ΔX is greater than 1000, the lens moves by 100 pulses, when ΔX is between 500 and 1000, the lens moves by 40 pulses, when ΔX is between 100 and 500, the lens moves by 20 pulses, and when ΔX is less than 10, the lens moves by 10 pulses;

[0025] When ΔY is greater than 1000, the lens moves 100 pulses, when ΔY is between 500 and 1000, the lens moves 40 pulses, when ΔY is between 100 and 500, the lens moves 20 pulses, and when ΔY is less than 10, the lens moves 10 pulses;

[0026] Among them, the distance corresponding to every 10,000 pulses is 2 mm.

[0027] Optionally, the

[0028] Adjusting the light output angle of the lens to a preset state through near-field and far-field debugging includes:

[0029] Read the coordinate X of the light spot in the near field state 11 and Y 11 , and read the coordinate X of the light spot in the far field state 12 and Y 12 ;

[0030] Make the light output angle of the lens in the X direction θ X and the light output angle θ in the Y direction Y Satisfies the following formula:

[0031]

[0032]

[0033] Where d is the distance between the far field and the near field.

[0034] Optionally, after adjusting the position of the lens relative to the light emitting device according to the deviation value between the light spot and the setting position of the beam profiler, the method further comprises:

[0035] The lens and the light emitting device are glued together and optically fixed.

[0036] Optionally, gluing the lens and the light emitting device together comprises:

[0037] A preset gap is reserved between the lens and the light emitting device;

[0038] Glue is dispensed on the light emitting device.

[0039] Another aspect of an embodiment of the present application provides a device for coupling light output angles, comprising:

[0040] A camera for visually identifying the light emitting device and the lens;

[0041] A moving arm, used for shifting the positions of the light emitting device and the lens;

[0042] A beam analyzer, used to display the position of the light spot projected by the light emitting device through the lens in the field of view;

[0043] A controller is used to control the movement of the moving arm based on the data of the camera and the beam profiler.

[0044] The beneficial effects of the embodiments of the present application include:

[0045] The device and method for coupling the light output angle provided in the embodiment of the present application respectively determine the initial shape and position of the light emitting device and the lens on the stage through visual recognition, and then transfer the light emitting device and the lens to the rod stage for alignment coupling. During the coupling process, the deviation between the position of the light spot generated after the rough alignment of the lens and the light emitting device and the position of the required incidence is used to determine the deviation of the light output angle, and the position of the lens relative to the light emitting device is adjusted based on this as a reference to achieve the coupling between the lens and the light emitting device. The above method, compared with the method of coupling by visual recognition in the prior art, does not need to take a photo to confirm the current position after moving a position, and then repeatedly fine-tune. The entire coupling process can better clarify the corresponding light output angle, which can improve the yield rate of coupling and reduce the time consumed by coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A schematic diagram of a method flow for coupling light output angles provided in an embodiment of the present application;

[0048] Figure 2 A schematic diagram of the flow chart of the lens movement direction during the coupling process provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0051] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] At present, when coupling a light-emitting device with a lens, the position of the lens and the light-emitting device is generally identified by a camera, and the position of the lens and the light-emitting device after being aligned is recorded by visual recognition, so as to perform alignment coupling with the help of visual recognition. The light output angle value of the finished material made by the above method cannot be monitored all the time, and the position must be repeatedly fine-tuned by visual recognition during mounting, which makes the mounting yield low and time-consuming. In view of the above problems, the embodiments of the present application provide the following technical solutions to overcome the above problems.

[0053] Please refer to Figure 1 This embodiment provides a method for coupling a light output angle, the method comprising:

[0054] S100, visually identifying the light-emitting device, moving the light-emitting device to a first preset position on a stage, and placing it at a first preset angle.

[0055] The stage is used as a preparation position before alignment. The light-emitting device needs to be placed on the stage in a specific form to facilitate consistency when it is subsequently transferred to the rod stage for alignment. The first preset position is placed for accurate absorption or grasping during the transfer process, and the first preset angle is placed to facilitate alignment of the light output angle and ensure consistency during each alignment.

[0056] S200, transferring the light emitting device to the rod stand so that the light outlet of the light emitting device and the light beam analyzer are on the same axis.

[0057] Placing the light outlet of the light emitting device and the beam analyzer on the same axis facilitates the subsequent light spot emitted through the lens to be within the field of view of the light emitting device, thereby ensuring the reliability of subsequent coupling.

[0058] S300, identifying the lens through vision, moving the lens to a second preset position on the stage, and placing it at a second preset angle.

[0059] Similarly, placing the lens at the second preset position is for accurate absorption or grasping during the transfer process, and placing it at the second preset angle is for the convenience of aligning the light output angle to ensure consistency during each alignment.

[0060] S400, moving the lens to a position relative to the light outlet so that the light spot is incident into the field of view of the beam analyzer.

[0061] At this point, it can be considered that the lens and the light-emitting device are roughly aligned, laying the foundation for the subsequent precise alignment of the lens.

[0062] S500, adjusting the position of the lens relative to the light emitting device according to the deviation value between the light spot and the reference position of the beam profiler.

[0063] When the light spot is incident on the field of view of the beam analyzer, the position of the lens is appropriately adjusted according to the deviation between the desired incident position and the actual incident position, so that the light spot gradually approaches the desired incident position to complete the coupling to the lens. It can be understood that the lens used in this application can be a convex lens.

[0064] The method for coupling the light output angle provided in the embodiment of the present application determines the initial shape and position of the light emitting device and the lens on the stage through visual recognition, and then transfers the light emitting device and the lens to the rod stage for alignment coupling. During the coupling process, the deviation between the position of the light spot generated after the rough alignment of the lens and the light emitting device and the position of the required incident light is used to determine the deviation of the light output angle, and the position of the lens relative to the light emitting device is adjusted based on this as a reference to achieve coupling between the lens and the light emitting device. The above method, compared with the method of coupling by visual recognition in the prior art, does not need to take a photo to confirm the current position after moving a position, and then repeatedly fine-tune. The entire coupling process can better clarify the corresponding light output angle, which can improve the yield rate of coupling and reduce the time consumed by coupling.

[0065] In an optional embodiment of the present application, adjusting the position of the lens relative to the light emitting device according to the deviation value between the light spot and the reference position of the beam profiler includes:

[0066] S510, in a single field state, moving the light spot to within a preset range around the reference position;

[0067] S520, adjusting the light output angle of the lens to a preset state through far-field and near-field debugging.

[0068] Specifically, in actual applications, due to the limitation of the movement accuracy, if it is too difficult to make the light spot incident into the field of view completely coincide with the reference position, a certain amount of deviation can be allowed in the actual coupling process, as long as the deviation is within the preset range. In addition, in the single-field state, moving the light spot position is to make a rough adjustment to the light angle emitted by the lens. After the rough adjustment is completed, the purpose of fine-tuning the light angle of the lens is achieved through far-field and near-field debugging.

[0069] It can be understood that the preset range is less than or equal to 200. That is to say, it only needs to be within 200 units around the reference position. The unit may be a pixel.

[0070] like Figure 2As shown, in the single field state, moving the light spot to a preset range around the reference position includes:

[0071] S512, determining the X-direction deviation value ΔX between the current light spot position and the reference position, and if ΔX is greater than 0, moving the lens in the negative direction of the X-direction, otherwise moving it in the positive direction.

[0072] S514, determining the Y-direction deviation ΔY between the current spot position and the reference position. If ΔX is greater than 0, the lens is moved in the negative direction of the Y direction, otherwise it is moved in the positive direction.

[0073] The X direction and the Y direction are two directions perpendicular to each other.

[0074] Specifically, the field of view of the incident light spot can be considered as an X-Y plane. In this plane, the current light spot position will deviate from the basic light spot position in the X direction and the Y direction. The distance and direction that the lens needs to move can be determined based on the above deviation values ​​ΔX and ΔY.

[0075] In an optional embodiment of the present application, if ΔX is greater than 0, causing the lens to move in the negative direction of the X direction includes: determining a distance of a single movement according to the size of ΔX.

[0076] For example, in order to improve the coupling efficiency, the distance of a single movement of the lens is controlled to be variable. When the value of ΔX is large, the distance of a single movement is large. If the value of ΔX is small, the distance of a single movement is correspondingly small.

[0077] If ΔX is greater than 0, moving the lens in the negative direction of the Y direction includes: determining a single moving distance according to the size of ΔY.

[0078] Similarly, in order to improve the coupling efficiency, the distance of the single movement of the lens is controlled to be variable. When the value of ΔY is large, the distance of the single movement is large. If the value of ΔY is small, the distance of the single movement is correspondingly small.

[0079] In an optional embodiment of the present application, when ΔX is greater than 1000, the lens moves 100 pulses, when ΔX is between 500 and 1000, the lens moves 40 pulses, when ΔX is between 100 and 500, the lens moves 20 pulses, and when ΔX is less than 10, the lens moves 10 pulses. When ΔY is greater than 1000, the lens moves 100 pulses, when ΔY is between 500 and 1000, the lens moves 40 pulses, when ΔY is between 100 and 500, the lens moves 20 pulses, and when ΔY is less than 10, the lens moves 10 pulses. The distance corresponding to every 10,000 pulses is 2 mm. The above form can reduce the probability of excessive movement and improve the efficiency of movement.

[0080] In an optional embodiment of the present application, adjusting the light output angle of the lens to a preset state through far-field and near-field debugging includes:

[0081] S522, read the coordinate X of the light spot in the near field state 11 and Y 11 , and read the coordinate X of the light spot in the far field state 12 and Y 12 .

[0082] S524, making the light output angle θ of the lens in the X direction X and the light output angle θ in the Y direction Y Satisfies the following formula:

[0083]

[0084]

[0085] Where d is the distance between the far field and the near field.

[0086] Specifically, θ X and θ Y It is the preset parameter value. When debugging in the far and near fields, the lens needs to be adjusted so that X 11 , Y 11 , X 12 and Y 12 Just meet the above requirements.

[0087] In an optional embodiment of the present application, after adjusting the position of the lens relative to the light emitting device according to the deviation value between the light spot and the setting position of the beam profiler, the method further includes:

[0088] S600, gluing the lens and the light emitting device together, and performing optical fixation.

[0089] After the relative positions of the lens and the light emitting device are determined, the two can be fixed to each other by gluing. During the gluing and fixing, UV light can be used for photocuring.

[0090] In an optional embodiment of the present application, gluing the lens and the light emitting device comprises:

[0091] S610, leaving a preset gap between the lens and the light-emitting device.

[0092] S620, dispensing glue on the light-emitting device.

[0093] Specifically, the preset gap facilitates glue fixation, and when glue is dispensed on the light-emitting device, glue can be dispensed at multiple positions to ensure the reliability of bonding.

[0094] The embodiment of the present application also discloses a device for coupling the light output angle, including: a camera for visually identifying a light emitting device and a lens; a movable arm for shifting the position of the light emitting device and the lens; a beam profiler for displaying the position of the light spot projected by the light emitting device through the lens in the field of view; and a controller for controlling the movement of the movable arm according to the data of the camera and the beam profiler. The device for coupling the light output angle applies the above-mentioned coupling method for coupling processing, and has the same beneficial effects as the coupling method in the aforementioned embodiment. The beneficial effects of the coupling method have been described in detail in the aforementioned embodiment and will not be repeated here.

[0095] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for coupling light output angle, characterized in that: The method comprises: Identify the light-emitting device by vision, and move the light-emitting device to a first preset position on the stage and place it at a first preset angle; Transferring the light emitting device to a rod stand so that the light outlet of the light emitting device is on the same axis as the beam profiler; Identify the lens through vision, and move the lens to a second preset position on the stage and place it at a second preset angle; Moving the lens to a position relative to the light outlet so that the light spot is incident into the field of view of the beam profiler; adjusting the position of the lens relative to the light emitting device according to a deviation value between the light spot and a reference position of the light beam profiler; Wherein, adjusting the position of the lens relative to the light emitting device according to the deviation value between the light spot and the reference position of the beam profiler comprises: In a single field state, moving the light spot to within a preset range around the reference position; By debugging the near and far fields, the light output angle of the lens is adjusted to a preset state; The step of adjusting the light output angle of the lens to a preset state through near-field and far-field debugging includes: Read the coordinate X of the light spot in the near field state 11 and Y 11 , and read the coordinate X of the light spot in the far field state 12 and Y 12 ; Make the light output angle of the lens in the X direction θ X and the light output angle θ in the Y direction Y Satisfies the following formula: ； ； Where d is the distance between the far field and the near field.

2. The method for coupling light output angle according to claim 1, characterized in that: In the single field state, moving the light spot to a preset range around the reference position includes: Determine the X-direction deviation value ΔX between the current spot position and the reference position, and if ΔX is greater than 0, move the lens in the negative direction of the X-direction, otherwise move it in the positive direction; Determine the Y-direction deviation ΔY between the current spot position and the reference position, and if ΔX is greater than 0, move the lens in the negative direction of the Y direction, otherwise move it in the positive direction; The X direction and the Y direction are two directions perpendicular to each other.

3. The method for coupling light output angle according to claim 2, characterized in that: If ΔX is greater than 0, moving the lens in the negative direction of the X direction comprises: Determine the distance of a single move according to the size of ΔX; If ΔX is greater than 0, the lens is moved in the negative direction of the Y direction, including: The distance of a single move is determined according to the size of ΔY.

4. The method for coupling light output angle according to claim 3, characterized in that: When ΔX is greater than 1000, the lens moves 100 pulses, when ΔX is between 500 and 1000, the lens moves 40 pulses, when ΔX is between 100 and 500, the lens moves 20 pulses, and when ΔX is less than 10, the lens moves 10 pulses; When ΔY is greater than 1000, the lens moves 100 pulses, when ΔY is between 500 and 1000, the lens moves 40 pulses, when ΔY is between 100 and 500, the lens moves 20 pulses, and when ΔY is less than 10, the lens moves 10 pulses; Among them, the distance corresponding to every 10,000 pulses is 2 mm.

5. The method for coupling light output angle according to any one of claims 1 to 4, characterized in that: After adjusting the position of the lens relative to the light emitting device according to the deviation value between the light spot and the setting position of the beam profiler, the method further includes: The lens and the light emitting device are glued together and optically fixed.

6. The method for coupling light output angle according to claim 1, characterized in that: The step of gluing the lens and the light emitting device comprises: A preset gap is reserved between the lens and the light emitting device; Glue is dispensed on the light emitting device.

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