Fixing support, laser and laser preparation device

Abstract

The utility model provides a kind of fixed support, laser and laser preparation device, it is related to the technical field of laser, fixed support is used to connect light transmission device, the fixed support at least includes first curved surface, the light transmission device is connected in the first curved surface by adhesive agent;The extension direction of the light transmission device is parallel to the tangent direction of the first curved surface.

Description

Technical Field

[0001] This utility model relates to the field of laser technology, and in particular to a fixed bracket, a laser, and a laser fabrication device. Background Technology

[0002] Semiconductor lasers, also known as laser diodes, are lasers that use semiconductor materials as their active medium. They are small in size, have a long lifespan, and can be pumped by a simple injection current. Therefore, semiconductor lasers have been widely used in laser communication, optical storage, optical gyroscopes, laser printing, ranging, and radar.

[0003] A semiconductor laser includes a housing, a laser chip, a transmission optical fiber, and an optical fiber support. The transmission optical fiber is fixed to the optical fiber support by UV adhesive, and the laser emitted by the laser chip is transmitted outward through the transmission optical fiber.

[0004] Existing fiber optic brackets are rectangular, with one side of the transmission fiber bonded to the fixed surface of the bracket sidewall using UV adhesive. However, since the fixed surface of the bracket sidewall is a vertical plane, and the transmission fiber is difficult to make parallel to this plane, the amount of adhesive applied to the front and back sides of the adhesive application point is different. When the environment changes, such as when humidity or temperature increases, the stress generated by the curing and shrinkage of the UV adhesive on the front and back sides of the adhesive application point is different, causing the position of the transmission fiber to rotate and shift. The transmission fiber has already been adjusted in orientation angle before fixing, i.e., matched with the chip orientation. The shift in the position of the transmission fiber will affect the coupling of the semiconductor laser. Utility Model Content

[0005] The purpose of this invention is to provide a fixed support, a laser, and a laser fabrication device to alleviate the technical problem that existing optical fibers are easily affected by the environment after curing, thus causing them to deflect relative to the support.

[0006] In a first aspect, the present invention provides a fixing bracket for connecting an optical transmission device, the fixing bracket including at least a first curved surface, the optical transmission device being connected to the first curved surface by an adhesive;

[0007] The extension direction of the optical transmission device is parallel to the tangent direction of the first curved surface.

[0008] Furthermore, the fixing bracket is made of metal, ceramic, or glass;

[0009] And / or, the radius of the first surface is greater than 1 mm⁻¹.

[0010] Secondly, the present invention provides a laser, including an optical transmission device and the aforementioned fixed bracket, wherein the fixed bracket is disposed on at least one side of the left and right sides of the optical transmission device.

[0011] The optical transmission device and the first curved surface are spaced apart, and a first colloid is disposed in the gap between them. The first colloid connects the optical transmission device to the first curved surface.

[0012] In the extending direction of the optical transmission device, the first colloid is symmetrically arranged with respect to the first normal, which is the line connecting the two points on the first curved surface and the optical transmission device that are closest to each other.

[0013] Furthermore, the laser also includes a chip, the light emitted by the chip being coupled to the optical transmission device; the vertical direction is the fast axis direction of the chip;

[0014] And / or, the optical transmission device is an optical fiber, a prism, or a collimator.

[0015] Furthermore, the laser also includes a support frame, which is disposed on at least one side of the upper and lower sides of the optical transmission device. The support frame includes at least a second curved surface, and the extending direction of the optical transmission device is parallel to the tangential direction of the second curved surface.

[0016] The optical transmission device is fixed to the second curved surface by a second colloid.

[0017] Furthermore, the optical transmission device and the second curved surface are spaced apart, and the gap between them is provided with the second colloid, which connects the optical transmission device to the second curved surface.

[0018] In the extending direction of the optical transmission device, the second colloid is symmetrically arranged with respect to the second normal, which is the line connecting the two points on the second surface and the optical transmission device that are closest to each other.

[0019] Thirdly, the laser fabrication method provided by this utility model is used to fabricate the aforementioned laser, including an adjustment bracket. The adjustment bracket is used to adjust the orientation of the optical transmission device so that the light emitted by the chip is coupled to the optical transmission device.

[0020] Furthermore, it also includes an image acquisition mechanism, which is used to acquire images of the first curved surface and the optical transmission device from top to bottom;

[0021] The position closest to the optical transmission device on the first curved surface is obtained based on the acquired image.

[0022] Furthermore, on the first plane, the orientation of the optical transmission device is adjusted by adjusting the bracket, and the first plane is perpendicular to the first curved surface;

[0023] The adjustment bracket includes two parallel and spaced-apart support arms, with the ends of the two support arms away from the first curved surface connected by a connector.

[0024] An opening is formed on one side of the connector on the back of the two support arms; a support groove is provided on the support arm, the extension direction of the support groove is parallel to the tangent of the first curved surface, and the support grooves on the two support arms are coaxially arranged; the optical transmission device is supported in the two support grooves; the ends of the two support arms that form the openings abut against the first curved surface.

[0025] Furthermore, on the first plane, the orientation of the optical transmission device is adjusted by adjusting the bracket, and the first plane is perpendicular to the first curved surface;

[0026] The adjustment bracket includes a support block, on which a third curved surface corresponding to the first curved surface is provided, and the third curved surface is in contact with the first curved surface.

[0027] The support block is provided with a support groove for accommodating the optical transmission device, and the extension direction of the support groove is parallel to the tangent of the third curved surface.

[0028] This utility model has at least the following advantages or beneficial effects:

[0029] The present invention provides a fixing bracket for connecting an optical transmission device. The fixing bracket includes at least a first curved surface, and the optical transmission device is connected to the first curved surface by an adhesive. The extension direction of the optical transmission device is parallel to the tangent direction of the first curved surface.

[0030] The optical transmission device is connected to a first curved surface on a mounting bracket via adhesive. Before connection, the optical transmission device is positioned so that its extension direction is parallel to the tangent direction of the first curved surface, and a gap is formed between the optical transmission device and the first curved surface. Adhesive is then applied to the closest point between the optical transmission device and the first curved surface, and the adhesive is symmetrically distributed on both sides of the application point along the extension direction of the optical transmission device. After the adhesive cures, the stress on both sides of the application point is equal. Even if the environment changes, the deformation of the adhesive on both sides of the application point remains the same. The optical transmission device only undergoes translation, moving closer to or further away from the first curved surface, without rotation, thus maintaining its parallel position to the optical axis of the chip. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1This is a side view of the laser after the fixed bracket and the optical transmission device are connected, as provided in Embodiment 1 of this utility model;

[0033] Figure 2 This is a top view of the laser after the fixed bracket and the optical transmission device are connected in Embodiment 1 of this utility model;

[0034] Figure 3 This is a side view of the laser provided in Embodiment 2 of the present invention;

[0035] Figure 4 A schematic diagram of step S2 in the laser fabrication method provided in this embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of another step S2 in the laser fabrication method provided in this embodiment of the present invention.

[0037] Icons: 1-Fixed bracket; 11-First curved surface;

[0038] 2-Optical transmission devices;

[0039] 3-First colloid; 4-First normal; 5-Second colloid; 6-Second normal; 7-Support arm; 8-Second curved surface; 9-Chip; 10-Support block. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] like Figure 1 and Figure 2 As shown, the fixed bracket 1 provided by this utility model is used to connect the optical transmission device 2, which can be an optical fiber, a prism, or a collimator. In this embodiment, the optical transmission device 2 is an optical fiber.

[0047] Specifically, the fixed bracket 1 has a first curved surface 11 on one side for connecting the optical transmission device 2. The light emitted by the chip 9 is coupled into the optical transmission device 2 and then emitted through the optical transmission device 2. During the process of aligning the chip 9 with the optical transmission device 2, the light emitted by the chip 9 can be accurately coupled into the optical transmission device 2 while ensuring that it is parallel to the tangent of the curved surface. The existing mounting bracket has a planar surface for connecting the optical transmission device 2. Therefore, the connection plane between the optical transmission device 2 and the mounting bracket 1 can only be approximately parallel, resulting in uneven thickness of the adhesive between the optical transmission device and the mounting bracket. During the curing process, uneven shrinkage or expansion of the adhesive causes the optical transmission device 2 to deflect, reducing the coupling efficiency. In contrast, the mounting bracket 1 has a curved surface for connecting the optical transmission device 2. Therefore, the optical transmission device 2 and the first curved surface 11 of the mounting bracket 1 can be approximately tangent from any angle. This makes the adhesive thickness symmetrical with respect to the tangent point when adhesive is added. During curing, the optical transmission device 2 does not rotate due to the expansion or contraction of the adhesive, which would reduce the coupling efficiency. This ensures a stable connection between the mounting bracket 1 and the optical transmission device 2, while also ensuring that the light emitted by the chip 9 is accurately and efficiently coupled to the optical transmission device 2.

[0048] During assembly, the optical transmission device 2 can be arranged to extend along the front-to-back direction. The fixing bracket 1 is located on the left side of the optical transmission device 2, and the first curved surface 11 of the optical transmission device 2 protrudes to the right. The first curved surface 11 can be semi-circular.

[0049] Before connection, the extension direction of the optical transmission device 2 is parallel to the tangent direction of the first curved surface 11, and a gap is formed between the optical transmission device 2 and the first curved surface 11. Then, adhesive is applied at the closest point between the optical transmission device 2 and the first curved surface 11, and the adhesive is symmetrically distributed on both sides of the application point in the extension direction of the optical transmission device 2. After the adhesive cures, the stress on both sides of the application point is the same. Even if the environment changes, the deformation of the adhesive on both sides of the application point is the same. The optical transmission device 2 only moves closer to or further away from the first curved surface 11 as a whole, without rotating, thereby continuing to maintain a state parallel to the optical axis of the chip 9.

[0050] The fixed bracket 1 is made of metal, ceramic or glass.

[0051] The radius of the first curved surface 11 is greater than 1 mm⁻¹.

[0052] like Figure 1 As shown, the laser provided by this utility model includes an optical transmission device 2 and the aforementioned fixed bracket 1, wherein the fixed bracket 1 is disposed on at least one side of the left and right sides of the optical transmission device 2.

[0053] The optical transmission device 2 and the first curved surface 11 are spaced apart, and a first colloid 3 is provided in the gap between them. That is to say, without the first colloid 3, the optical transmission device 2 and the first curved surface 11 will not be in contact. The optical transmission device 2 is completely adhered to the first curved surface 11 by the first colloid 3.

[0054] In the extending direction (front-back direction) of the optical transmission device 2, the first colloid 3 is symmetrically arranged with respect to the first normal 4, which is the line connecting the two points of shortest distance between the first curved surface 11 and the optical transmission device 2. The position corresponding to the first normal 4 is the dispensing position. After dispensing at this position, due to the adhesion effect, the adhesive will move uniformly along the first curved surface 11 to both sides of the first normal 4, so that the amount of adhesive on both sides of the first normal 4 is almost the same. After the adhesive cures, the stress on both sides of the dispensing position is the same. Even if the environment changes, the deformation of the adhesive on both sides of the dispensing position is the same. The optical transmission device 2 only moves as a whole closer to or away from the first curved surface 11 without rotating, thus continuing to maintain a state parallel to the optical axis of the chip 9.

[0055] The laser also includes a chip 9, which is located behind the optical transmission device 2. The light emitted by the chip 9 is coupled to the optical transmission device 2. The vertical direction is the fast axis direction of the chip 9.

[0056] like Figure 3 As shown, in addition to the fixed bracket 1, in order to increase the stability of the optical fiber, the laser also includes a support frame. The support frame is disposed on at least one side of the upper and lower sides of the optical transmission device 2. The support frame includes at least a second curved surface 8. The extending direction of the optical transmission device 2 is parallel to the tangent direction of the second curved surface 8. The optical transmission device 2 is fixed to the second curved surface 8 by a second colloid 5.

[0057] The up-down direction is the fast axis direction of the chip 9, and the left-right direction is the slow axis direction of the chip 9. The first curved surface 11 is set on the left or right side of the optical transmission device 2. By taking advantage of the low sensitivity of the slow axis direction, the error of beam coupling can be reduced.

[0058] The second curved surface 8 can be connected to the optical transmission device 2 using the same dispensing method as the first curved surface 11 and the optical transmission device 2. Specifically, before dispensing, a gap is adjusted between the optical transmission device 2 and the second curved surface 8, and then adhesive is dispensed into the gap to form the second adhesive 5. The second adhesive 5 connects the optical transmission device 2 to the second curved surface 8. Notably, the second adhesive 5 is symmetrically arranged with respect to the second normal 6 in the extending direction of the optical transmission device 2, and the second normal 6 is the line connecting the two points of the second curved surface 8 and the optical transmission device 2 with the shortest distance. After the second adhesive 5 cures, the stress on both sides of the dispensing position is the same. Even if the adhesive expands or contracts due to environmental changes, the deformation of the adhesive on both sides of the dispensing position is the same. The optical transmission device 2 only moves closer to or further away from the second curved surface 8 as a whole, without rotation, thus continuing to maintain a state parallel to the optical axis of the chip 9.

[0059] The first curved surface 11 and the second curved surface 8 are located at two vertical positions, respectively, so that the optical transmission device 2 can be stably fixed in two vertical directions (up and down and left and right) to avoid the optical transmission device 2 from deflection.

[0060] This invention provides a laser fabrication apparatus capable of fabricating the aforementioned laser. The specific operating steps are as follows:

[0061] like Figure 1 and Figure 2 As shown, step S1. provides a fixed bracket 1, an optical transmission device 2, and a chip 9; wherein, the fixed bracket 1 includes a first curved surface 11; the extension direction of the optical transmission device 2 is parallel to the tangential direction of the first curved surface 11.

[0062] Chip 9 has been fixed on chip 9 bracket and is positioned to emit light facing forward. When assembling optical transmission device 2, it can be arranged to extend along the front-back direction. The fixing bracket 1 is located on the left side of optical transmission device 2, and the first curved surface 11 of optical transmission device 2 protrudes to the right. The first curved surface 11 can be semi-circular.

[0063] Step S2. Adjust the orientation of the optical transmission device 2 so that the light emitted by the chip 9 is coupled to the optical transmission device 2.

[0064] The optical transmission device 2 can be grasped by adjusting the bracket, and then the adjustment bracket can be moved by the drive module so that the light emitted by the chip 9 is coupled to the optical transmission device 2.

[0065] Step S3. Apply adhesive to the position on the first curved surface 11 closest to the optical transmission device 2 and cure it.

[0066] In the extension direction of the optical transmission device 2, the adhesive on both sides of the dispensing position is symmetrically distributed. After the adhesive is cured, the stress on both sides of the dispensing position is the same. Even if the environment changes, the deformation of the adhesive on both sides of the dispensing position is the same. The optical transmission device 2 only moves closer to or further away from the first curved surface 11 as a whole, without rotating, so as to continue to maintain a state parallel to the optical axis of the chip 9.

[0067] Specifically, step S3 includes the following steps:

[0068] S30. Obtain the position of the first curved surface 11 closest to the optical transmission device 2.

[0069] Step S30 can be implemented using image recognition. Specifically, an image acquisition mechanism is arranged above the device to acquire images of the first curved surface 11 and the optical transmission device 2 from top to bottom. Through image analysis, the position on the first curved surface 11 closest to the optical transmission device 2 is obtained. Then, adhesive is applied at this position and cured once. The amount of adhesive applied needs to cover the outer wall of the optical transmission device 2 (optical fiber) to achieve a stable connection. Because the adhesive shrinks during curing, the optical transmission device 2 will deviate from its original preset position. Therefore, after the first curing, the orientation of the transmission device 2 is detected, and it is determined whether the light emitted by the chip 9 is coupled to the optical transmission device 2. If not, the orientation of the optical transmission device 2 is adjusted so that the light emitted by the chip 9 is coupled to the optical transmission device 2. If yes, the next curing is performed. The above detection and curing process is repeated until the optical transmission device 2 is completely cured, at which point the light emitted by the chip 9 can be coupled into the optical transmission device 2.

[0070] like Figure 4 As shown, in one feasible embodiment, in step S2, the orientation of the optical transmission device 2 is adjusted by adjusting a bracket on a first plane perpendicular to the first curved surface 11. The adjusting bracket includes two parallel and spaced-apart support arms 7, with one end of each support arm 7 away from the first curved surface 11 connected by a connector. An opening is formed on one side of the two support arms 7 behind the connector. A support groove is provided on each support arm 7, the extension direction of which is parallel to the tangent of the first curved surface 11, and the support grooves on the two support arms 7 are coaxially arranged. The optical transmission device 2 is supported in the two support grooves. The ends of the two support arms 7 that form the openings abut against the first curved surface 11.

[0071] The fabrication method utilizes a novel adjustment bracket, which is U-shaped with two parallel support arms 7 of equal length. Support grooves are positioned at the same locations on both support arms 7, with the width of the grooves approximately the same as the diameter of the optical transmission device 2. This limits the movement of the optical transmission device 2, preventing it from swaying laterally. The two support arms 7 jointly support the optical transmission device 2, providing stable support at both its front and rear ends. Simultaneously, the opening formed by the two support arms 7 abuts against the first curved surface 11. Regardless of the rotation of the adjustment bracket, the distance between the optical transmission device 2 and the first curved surface 11 remains constant, thus determining the gap width between them and providing a structural basis for subsequent dispensing.

[0072] like Figure 5 As shown, in another possible implementation, the adjustment bracket includes a support block 10, on which a third curved surface corresponding to the first curved surface 11 is provided, the third curved surface being in contact with the first curved surface 11; the support block 10 is provided with a support groove for accommodating the optical transmission device 2, the extension direction of the support groove being parallel to the tangent of the third curved surface.

[0073] Unlike the adjustment bracket in the above embodiments, the adjustment bracket in this embodiment includes a support block 10 with a relatively long support groove, which can support a certain length of the optical transmission device 2, providing more stable support. Simultaneously, the third curved surface corresponds to the first curved surface 11, and the two are roughly complementary. Therefore, regardless of how the adjustment bracket is rotated, the distance between the optical transmission device 2 and the first curved surface 11 remains the same. It should be noted that in this embodiment, the depth of the support groove is less than the radius of the optical transmission device 2 to avoid interference with the adhesive application.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mounting bracket for connecting an optical transmission device (2), characterized in that, The fixed bracket (1) includes at least a first curved surface (11), and the optical transmission device (2) is connected to the first curved surface (11) by adhesive. The extension direction of the optical transmission device (2) is parallel to the tangent direction of the first curved surface (11).

2. The fixed bracket (1) according to claim 1, characterized in that, The fixed bracket (1) is made of metal, ceramic or glass; And / or, the radius of the first surface (11) is greater than 1 mm⁻¹.

3. A laser, characterized in that, It includes an optical transmission device (2) and a fixed bracket (1) as described in claim 1 or 2, wherein the fixed bracket (1) is disposed on at least one side of the left and right sides of the optical transmission device (2); The optical transmission device (2) and the first curved surface (11) are spaced apart, and a first colloid (3) is provided in the gap between them. The first colloid (3) connects the optical transmission device (2) to the first curved surface (11). In the extending direction of the optical transmission device (2), the first colloid (3) is symmetrically arranged with respect to the first normal (4), which is the line connecting the two points of the first curved surface (11) and the optical transmission device (2) with the shortest distance.

4. The laser according to claim 3, characterized in that, The laser also includes a chip (9), the light emitted by the chip (9) is coupled to the optical transmission device (2); the up and down direction is the fast axis direction of the chip (9); And / or, the optical transmission device (2) is an optical fiber, a prism, or a collimator.

5. The laser according to claim 3, characterized in that, The laser also includes a support frame, which is disposed on at least one side of the upper and lower sides of the optical transmission device (2). The support frame includes at least a second curved surface (8), and the extending direction of the optical transmission device (2) is parallel to the tangential direction of the second curved surface (8). The optical transmission device (2) is fixed to the second curved surface (8) by the second colloid (5).

6. The laser according to claim 5, characterized in that, The optical transmission device (2) and the second curved surface (8) are spaced apart, and the second colloid (5) is provided in the gap between them. The second colloid (5) connects the optical transmission device (2) to the second curved surface (8). In the extending direction of the optical transmission device (2), the second colloid (5) is symmetrically arranged with respect to the second normal (6), which is the line connecting the two points of the second curved surface (8) and the optical transmission device (2) with the shortest distance.

7. A laser fabrication apparatus for fabricating the laser according to any one of claims 3-5, characterized in that, The device includes an adjustment bracket for adjusting the orientation of the optical transmission device (2) so that the light emitted by the chip (9) is coupled to the optical transmission device (2).

8. The laser fabrication apparatus according to claim 7, characterized in that, It also includes an image acquisition mechanism, which is used to acquire images of the first curved surface (11) and the optical transmission device (2) from top to bottom; The position closest to the optical transmission device (2) on the first curved surface (11) is obtained based on the acquired image.

9. The laser fabrication apparatus according to claim 7 or 8, characterized in that, On the first plane, the orientation of the optical transmission device (2) is adjusted by adjusting the bracket, and the first plane is perpendicular to the first curved surface (11); The adjustment bracket includes two parallel and spaced support arms (7), and the ends of the two support arms (7) away from the first curved surface (11) are connected by a connector; An opening is formed on one side of the connector on the back of the two support arms (7); a support groove is provided on the support arm (7), the extension direction of the support groove is parallel to the tangent of the first curved surface (11), and the support grooves on the two support arms (7) are coaxially arranged; the optical transmission device (2) is supported in the two support grooves; the ends of the two support arms (7) that form the openings abut against the first curved surface (11).

10. The laser fabrication apparatus according to claim 7 or 8, characterized in that, On the first plane, the orientation of the optical transmission device (2) is adjusted by adjusting the bracket, and the first plane is perpendicular to the first curved surface (11); The adjustment bracket includes a support block (10), and the support block (10) is provided with a third curved surface corresponding to the first curved surface (11), and the third curved surface is in contact with the first curved surface (11); The support block (10) is provided with a support groove, which is used to accommodate the optical transmission device (2), and the extension direction of the support groove is parallel to the tangent of the third curved surface.

Images