A lens clamping mechanism used in lens coupling assembly of microcoherence modulator
By using a lens clamping mechanism with rotating seat, vertical guide and horizontal guide mechanism in the microcoherent modulator, the problem of position and angle changes in the lens during assembly is solved, and the precise positioning and angle stability of the lens are achieved, and the improvement of the lens is improved. The accuracy and pass rate of assembly are achieved.
Patent Information
- Application Number
- CN201911334187.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-12-23
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2039-12-23
AI Technical Summary
In the prior art, the lens cannot overcome the lateral thrust during the coupling assembly process of the microcoherent modulator, which causes changes in the lens position and angle, which affects the coupling power. Especially after UV bonding, the situation becomes more serious, resulting in a decrease in coupling power.
The lens clamping mechanism including lens clamp, rotating seat, rotating disk, vertical guide mechanism, horizontal guide mechanism, clamping mechanism, displacement detection mechanism and reset mechanism are adopted to realize the rotation and movement of the lens clamp through the rotating seat and rotating disk to ensure that The lens is precisely positioned and has a stable angle, and the clamping force is controlled by the cylinder to prevent angle and position changes.
It effectively prevents the position and angle of the lens during the assembly process, ensures the stability of the coupling power, improves the accuracy and qualification rate of the assembly, and ensures that the lens position remains unchanged during the dispensing and UV process.
Smart Images
Figure CN110989124B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of coherent optical communication, and in particular to a lens clamping mechanism used in the lens coupling assembly of a micro-coherent modulator. Background Art
[0002] In the lens coupling stage of the microcoherent modulator, the lens is usually clamped by a nozzle structure and extracted by vacuum suction. The advantage of this method is that the structure is simple and very small lenses can be sucked for assembly. However, this method has the following problems:
[0003] 1. When the lens contacts the modulator base, the vacuum suction is limited and cannot overcome the lateral thrust, causing the lens to move or change its angle, thereby reducing the coupling power.
[0004] 2. After the lens is glued with UV glue, the above situation is more serious. Due to the viscosity of UV glue, the lateral external force increases, which causes the coupling power to not return to the optimal level after dispensing or the coupling power is easily reduced during the UV process; if the lens position deviates by 0.5um or the angle changes by 0.5 degrees, the coupling power will be reduced by 5%, which is not allowed during the assembly process of the modulator lens.
[0005] In order to solve the above problems, a lens clamp structure is proposed to clamp the lens, so as to reduce or prevent the change of the position and angle of the lens during the coupling assembly process. Summary of the invention
[0006] In view of the deficiencies in the prior art, the present invention provides a lens clamping mechanism used in the coupling assembly of a micro-coherence modulator lens, which solves the problem in the prior art that the position and angle of the lens assembly change during the coupling assembly process due to the inability to overcome the lateral thrust of the lens.
[0007] To achieve the above object, the present invention adopts the following technical solutions:
[0008] A lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator comprises a lens clamp, a rotating seat and a rotating disk. The rotating disk rotates to drive the rotating seat to move synchronously with it to adjust the rotation angle of the lens clamp. Meanwhile, the rotating seat rotates to drive the lens clamp to move up and down, thereby fine-tuning the lens to achieve precise positioning.
[0009] Furthermore, the rotating seat adopts a vertical guide mechanism and a power mechanism to drive the lens clamp to move vertically. When the lens clamp moves vertically, the displacement detection mechanism and the reset mechanism detect the moving distance and reset it.
[0010] In addition, a clamping mechanism is also included, and the clamping mechanism is used to limit the lens clamp to be clamped / opened in the horizontal direction.
[0011] Preferably, the lens clamp comprises a fixed clamp and a movable clamp used in conjunction with each other, and a horizontal reset member is provided between the two;
[0012] The clamping mechanism drives the movable clamp to move through the horizontal guide mechanism to achieve the clamping / opening of the lens clamp.
[0013] Furthermore, the vertical guide mechanism includes a connecting plate connected to the lens clamp, a vertical guide groove located on the connecting plate, a vertical guide rail matching the vertical guide groove, and the vertical guide rail is fixed on the rotating seat;
[0014] The side edge of the connecting plate close to the lens clamp is inwardly recessed to form a blind hole.
[0015] Furthermore, the rotating seat includes a connecting plate connected to the rotating plate, the outer wall of the connecting plate extends towards the direction of the lens clamp with a hook-shaped connecting portion, the vertical guide rail is fixed on the inner side of the connecting portion, and a screw rod passes through the hook end of the connecting portion, one end of the screw rod is placed in a blind hole and abuts against the connecting plate, and the screw rod and the connecting portion move relative to each other.
[0016] Furthermore, the horizontal guide mechanism comprises a mounting plate with a horizontal guide groove on one side and a horizontal guide rail used in conjunction with the mounting plate, wherein the horizontal guide rail is connected to a side of the connecting plate facing away from the vertical guide groove.
[0017] Further, the clamping mechanism includes a cylinder and a clamping wedge fixed to the movable clamp;
[0018] When clamping the lens, the cylinder drives the pressing wedge after the lens abuts against the fixed clamp, and the horizontal reset member is compressed under the action of the cylinder, and the horizontal guide groove moves on the horizontal guide rail to make the movable clamp move toward the fixed clamp, and the lens clamp clamps the lens;
[0019] After the lens is assembled, the cylinder is reset, and under the action of the horizontal reset member, the horizontal guide groove moves in the opposite direction on the horizontal guide rail, so that the movable clamp moves in the direction away from the fixed clamp, and the lens clamp opens.
[0020] Furthermore, the displacement detection mechanism is a displacement sensor, and the displacement is detected by the displacement sensor when the lens clamp moves up and down;
[0021] The reset mechanism is a vertical reset spring, which is located at the top of the lens clamp. When the lens clamp moves up and down, it is reset by the vertical reset spring.
[0022] Furthermore, a notch is formed at one side of the end of the fixed clamp facing the movable clamp.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] 1. When assembling the micro-coherent modulator, five lenses need to be assembled, but two of the lenses are 90 degrees apart from the other three lenses. Therefore, a rotating disk is set on the lens clamp, which can rotate 360 degrees. The rotation of the rotating disk drives the rotating seat to rotate synchronously with it, so as to adjust the angle of the lens clamp and facilitate the assembly of lenses with different angles. To ensure that the angle between the lens and the rotating seat does not change during the rotation process, the rotating axis of the rotating disk coincides with the center line of the lens during installation;
[0025] 2. In order to ensure that the lens clamp will not move horizontally when it moves vertically in the entire mechanism, a vertical guide mechanism is specially added; in order to ensure that the lens clamp will not be misplaced when it is opened / tightened, a horizontal guide mechanism is set in the horizontal direction;
[0026] 3. The lens clamp is controlled by a cylinder when clamping, which ensures the consistency and stability of the lens clamp force; it will not move during the dispensing fine-tuning and UV process;
[0027] 4. The lens is square, and the lens clamp itself has a guiding function. Once the lens is clamped by the lens clamp, the installation angle of the rotating seat is guaranteed and will not change, thus ensuring the consistency of the angle. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0030] Figure 2 is a schematic diagram of the lens clamping mechanism of the present invention;
[0031] Figure 3 It is a structural schematic diagram of the lens and the vertical guide mechanism of the present invention;
[0032] Figure 4 It is a schematic diagram of the assembly of the present invention with the vertical guide mechanism, the horizontal guide mechanism, and the clamping mechanism;
[0033] Figure 5 for Figure 4 A schematic diagram of the structure from another angle;
[0034] Figure 6 Distribution diagram of lens offset angles assembled for existing lens nozzles;
[0035] Figure 7This is a distribution diagram of the angle deviation of the lenses assembled by the lens clip of the present invention.
[0036] In the figure: lens clamp 1, rotating seat 2, rotating disk 3, fixed clamp 11, movable clamp 12, horizontal reset member 13, connecting disk 20, connecting part 21, screw 22, connecting plate 23, vertical guide groove 24, vertical guide rail 25, vertical reset spring 26, displacement sensor 27, horizontal guide rail 31, horizontal guide groove 32, cylinder 33, and tightening wedge 34. DETAILED DESCRIPTION
[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0038] like Figure 1-5 As shown, the present invention proposes a lens clamp 1 assembly mechanism used in the lens coupling assembly of a micro-coherence modulator, comprising a lens clamp 1, a rotating seat 2, and a rotating disk 3. The rotating disk 3 rotates to drive the rotating seat 2 to move synchronously with it to adjust the rotation angle of the lens clamp 1; at the same time, the rotating seat 2 rotates to drive the lens clamp 1 to move up and down, and the lens is fine-tuned to achieve precise positioning. When assembling a micro-coherence modulator, 5 lenses need to be assembled, but two of the lenses differ by 90 degrees from the other three lenses. Therefore, a rotating disk 3 is set on the lens clamp 1. The rotating disk 3 can rotate 360 degrees. The rotating disk 3 rotates to drive the rotating seat 2 to rotate synchronously with it to adjust the angle of the lens clamp 1, which is convenient for assembling lenses of different angles. In order to ensure that the angle of the lens and the rotating seat 2 does not change during the rotation process, the rotating axis of the rotating disk 3 coincides with the center line of the lens during installation.
[0039] Furthermore, the rotating seat 2 uses a vertical guide mechanism and a power mechanism to drive the lens clamp 1 to move vertically. When the lens clamp 1 moves vertically, the displacement detection mechanism and the reset mechanism detect the moving distance and reset. The displacement detection mechanism is a displacement sensor 27. When the lens clamp 1 moves up and down, the displacement sensor 27 detects the moving displacement; the reset mechanism is a vertical reset spring 26. The vertical reset spring 26 is located at the top of the lens clamp 1. When the lens clamp 1 moves up and down, it is reset by the vertical reset spring 26.
[0040] Preferably, the lens clamp 1 includes a fixed clamp 11 and a movable clamp 12 that cooperate with each other, and a horizontal reset member 13 is provided between the two; a notch is provided at the end of the fixed clamp 11 facing the movable clamp 12. In order to ensure that the lens clamp 1 does not move horizontally when it moves vertically in the entire mechanism, a vertical guide mechanism is specially provided. The vertical guide mechanism includes a connecting plate 23 connected to the lens clamp 1, a vertical guide groove 24 located on the connecting plate 23, and a vertical guide rail 25 used in cooperation with the vertical guide groove 24, and the vertical guide rail 25 is fixed on the rotating seat 2, and the vertical guide groove 24 moves on the vertical guide rail 25 when it moves up and down; the connecting plate 23 is recessed inward on one side close to the lens clamp 1 to form a blind hole. The rotating seat 2 includes a connecting plate 20 connected to the rotating plate 3, and the outer wall of the connecting plate 20 extends toward the direction of the lens clamp 1 with a hook-shaped connecting portion 21, a vertical guide rail 25 is fixed on the inner side of the connecting portion 21, and a screw rod 22 passes through the hook end of the connecting portion 21, one end of the screw rod 22 is placed in a blind hole and abuts against the connecting plate 23, and the screw rod 22 and the connecting portion 21 move relative to each other.
[0041] When the lens clamp 1 of the present invention moves vertically, the rotating disk 3 rotates to drive the rotating seat 2 to rotate synchronously, the rotating connection part 21 of the rotating seat 2 rotates in the opposite direction with the screw rod 22, the screw rod 22 moves upward to push the connecting plate 23 to drive the vertical guide groove 24 to move upward on the vertical slide rail, thereby driving the lens clamp 1 to move upward, the vertical return spring 26 of the lens clamp 1 to move upward is compressed, and the displacement sensor 27 detects the moving distance during the movement. The screw rod 22 moves downward, the screw rod 22 and the connecting plate 23 are separated, the vertical return spring 26 is reset, and the vertical guide groove 24 moves up and down on the vertical guide rail 25, thereby driving the lens clamp 1 to move downward.
[0042] Similarly, in order to ensure that the lens clamp 1 does not misalign when opening / tightening, a horizontal guide mechanism is provided in the horizontal direction; the horizontal guide mechanism includes a mounting plate with a horizontal guide groove 32 on one side, and a horizontal guide rail 31 used in conjunction with the mounting plate, and the horizontal guide rail 31 is connected to the side of the connecting plate 23 facing away from the vertical guide groove 24. In addition, a clamping mechanism is also included, and the clamping mechanism is used to limit the clamping / opening of the lens clamp 1 in the horizontal direction; the clamping mechanism drives the movable clamp 12 to move through the horizontal guide mechanism to achieve the clamping / opening of the lens clamp 1. The clamping mechanism includes a cylinder 33 and a clamping wedge 34 fixed to the mobile clamp 12; when clamping the lens, the cylinder 33 drives the clamping wedge 34 after the lens abuts against the fixed clamp 11, and the horizontal reset member 13 is compressed under the action of the cylinder 33, and the horizontal guide groove 32 moves on the horizontal guide rail 31 to make the mobile clamp 12 move toward the fixed clamp 11, and the lens clamp 1 clamps the lens; after the lens is assembled, the cylinder 33 is reset, and the horizontal guide groove 32 moves in the opposite direction on the horizontal guide rail 31 under the action of the horizontal reset member 13, so that the mobile clamp 12 moves in the direction away from the fixed clamp 11, and the lens clamp 1 opens. The lens clamp 1 is controlled by the cylinder 33 when clamping, which ensures the consistency and stability of the clamping force of the lens clamp 1; it will not move during the process of glue dispensing fine adjustment and UV. The lens is square, and the lens clamp 1 itself has a guiding function. Once the lens is clamped by the lens clamp 1, its installation angle equivalent to the rotating seat 2 is very guaranteed, and the angle will not change, thereby ensuring the consistency of the angle.
[0043] See also Figure 6-7 It can be seen that the angle deviation of the lens assembled by the lens nozzle is mostly within 0.5 degrees, but there are still many points outside 0.5 degrees, which greatly affects the pass rate. However, the angles of the lenses assembled by the lens clamp 1 are all within 0.5 degrees, and the pass rate is 100%. Therefore, the lens clamp 1 has a great improvement in improving the angle of lens assembly.
[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator, characterized in that: The invention comprises a lens clamp (1), a rotating seat (2) and a rotating disk (3). The rotating disk (3) rotates to drive the rotating seat (2) to move synchronously with the rotating seat to adjust the rotation angle of the lens clamp (1). Meanwhile, the rotating seat (2) rotates to drive the lens clamp (1) to move vertically, so as to fine-tune the lens and realize accurate positioning. The rotating seat (2) uses a vertical guide mechanism to drive the lens clamp (1) to move vertically. When the lens clamp (1) moves vertically, the displacement detection mechanism and the reset mechanism detect the moving distance and reset. The vertical guide mechanism comprises a connecting plate (23) connected to the lens clamp (1), a vertical guide groove (24) located on the connecting plate (23), and a vertical guide rail (25) used in conjunction with the vertical guide groove (24), and the vertical guide rail (25) is fixed on the rotating seat (2); a side edge of the connecting plate (23) close to the lens clamp (1) is inwardly recessed to form a blind hole, and The rotating seat (2) comprises a connecting plate (20) connected to the rotating plate (3); the outer wall of the connecting plate (20) is provided with a hook-shaped connecting portion (21) extending in the direction of the lens clamp (1); a vertical guide rail (25) is fixed on the inner side of the connecting portion (21); a screw rod (22) penetrates the hook end of the connecting portion (21); one end of the screw rod (22) is placed in a blind hole and abuts against the connecting plate (23); the rotating plate (3) rotates to drive the screw rod (22) and the connecting portion (21) to move relative to each other.
2. The lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator according to claim 1, characterized in that: It also comprises a clamping mechanism, which is used to limit the lens clamp (1) to be clamped / opened in the horizontal direction; the clamping mechanism drives the movable clamp (12) to move through the horizontal guide mechanism, thereby achieving the clamping / opening of the lens clamp (1).
3. The lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator according to claim 2, characterized in that: The lens clamp (1) comprises a fixed clamp (11) and a movable clamp (12) which cooperate with each other, and a horizontal resetting member (13) is provided between the two.
4. The lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator according to claim 3, characterized in that: The horizontal guide mechanism comprises a mounting plate with a horizontal guide groove (32) on one side and a horizontal guide rail (31) used in conjunction with the mounting plate. The horizontal guide rail (31) is fixed on the side of the connecting plate (23) facing away from the vertical guide groove (24).
5. The lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator according to claim 4, characterized in that: The clamping mechanism comprises a cylinder (33) and a clamping wedge (34) fixed to the movable clamp (12); When clamping the lens, the cylinder (33) drives the pressing wedge (34) after the lens abuts against the fixed clamp (11), and the horizontal reset member (13) is compressed under the action of the cylinder (33), and the horizontal guide groove (32) moves on the horizontal guide rail (31) to move the movable clamp (12) toward the fixed clamp (11), and the lens clamp (1) clamps the lens; After the lens is assembled, the cylinder (33) is reset, and under the action of the horizontal reset member (13), the horizontal guide groove (32) moves in the opposite direction on the horizontal guide rail (31), so that the movable clamp (12) moves in the direction away from the fixed clamp (11), and the lens clamp (1) opens.
6. The lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator according to claim 2, characterized in that: The displacement detection mechanism is a displacement sensor (27), and when the lens clamp (1) moves up and down, the displacement is detected by the displacement sensor (27); The reset mechanism is a vertical reset spring (26), which is located at the top of the lens clamp (1). When the lens clamp (1) moves up and down, it is reset by the vertical reset spring (26).
7. The lens clamping mechanism used in the lens coupling assembly of a micro-coherence modulator according to claim 3, characterized in that: A notch is formed at one side of the end of the fixed clamp (11) facing the movable clamp (12).