A laser reflection device and a laser

Abstract

The application provides a laser reflection device and a laser. The laser reflection device comprises a transmitting optical fiber, a receiving optical fiber, a mirror and a convex lens. The laser reflection device further comprises a mirror fixing member. The mirror is in a round cake type, and the mirror fixing member is in a spherical shell structure with two sides of the outer surface cut off. The two sides can receive light and emit light. The mirror is sleeved on the inner side of the mirror fixing member. Pin holes are arranged on the mirror and the mirror fixing member. A rotating pin is arranged on the outer side of the mirror fixing member. Through the detachable design characteristics between the pin holes and the rotating pin, and through the special shape matching of the mirror and the mirror fixing member, the coordinates of laser entering the receiving optical fiber in the X-axis direction and the Y-axis direction are simultaneously adjusted. Moreover, the problem that the two-dimensional movement of the laser reflection device adjusting the light beam and the fixed clamping mechanism of the laser reflection device coexist is solved.

Description

Technical Field

[0001] This application relates to the field of laser technology, and in particular to a laser reflecting device and a laser. Background Technology

[0002] As laser technology matures, laser beams are increasingly used for cutting, welding, drilling, marking, and scribing workpieces made of various materials. Traditional machining can produce unwanted defects, such as microcracks or burrs that may form when the workpiece is under stress, thus degrading and weakening the strength and quality of the workpiece. Laser processing minimizes these unwanted defects, is generally cleaner, and results in a smaller heat-affected zone. Laser processing uses a focused laser beam to produce precise cuts and holes with high-quality edges, minimizing the formation of unwanted defects.

[0003] Fiber lasers, due to their high power and high beam quality, have been widely used in industrial laser processing applications, such as laser cutting and welding of metals and metal alloys. Normally, the laser beam propagates forward through the fiber, but in some special applications, it is necessary to use reflectors to reverse the laser beam propagation, such as reverse fiber couplers.

[0004] To achieve laser reverse transmission, a reflector is required. Reflection creates a reflection angle, and the manufacturing of components inherently involves errors. During assembly, it's often difficult to ensure a perfect fit at the installation angle, and sometimes, for repeated use, the reflection angle needs to be adjustable to ensure the beam reaches the center of the target fiber. Furthermore, as... Figure 1 As shown, the center of the target optical fiber is on the end face of the fiber, which belongs to two-dimensional coordinates, namely X and Y coordinates. It is extremely difficult for existing optical devices to adjust the coordinates or angles of two dimensions at the same time. After the beam is adjusted, the accuracy of the beam entering the target coordinates cannot be guaranteed at the same time.

[0005] Therefore, it is necessary to design a laser reflection device that can adjust the two-dimensional movement of the laser beam in the X and Y directions on the end face of the target optical fiber to solve the problem of flexible beam adjustment. At the same time, it is also necessary to set up a fixing and clamping mechanism to solve the accuracy and stability of the beam reaching the target coordinates. Summary of the Invention

[0006] This application provides a laser reflecting device and a laser. The laser reflecting device provided by this application includes: a transmitting optical fiber, a receiving optical fiber, a reflector, and a convex lens. The beam emission and reception directions are opposite to each other (it should be noted that the opposite directions here are approximately opposite, not necessarily exactly 180° opposite; for example, a deviation of less than 10° from 170° can also be considered as the opposite direction described in this application). The convex lens is located between the transmitting optical fiber and the reflector, and also between the receiving optical fiber and the reflector. The beam is emitted from the transmitting optical fiber. After leaving the transmitting optical fiber, the beam usually diffuses. After passing through the convex lens, the beam becomes collimated, then is reflected by the reflector, and then focused by the convex lens before entering the center of the receiving optical fiber.

[0007] The receiving optical fiber has an end face. A three-dimensional coordinate system is set with the center of the end face as the origin. The X-axis and Y-axis are located on the end face and are perpendicular to each other, while the Z-axis passes through the center of the end face and is perpendicular to it. The reflector of this application has two adjustable degrees of freedom, which can be used to change the coordinates of the light beam incident on the end face in the X-axis direction and the Y-axis direction, respectively.

[0008] The laser reflection device of this application changes the coordinates of the beam in the X-axis direction and the Y-axis direction on the end face by adjusting the rotation of the reflector 3 around the Y-axis and the X-axis. In turn, the coordinates of the beam in the X-axis direction and the Y-axis direction on the end face are adjusted so that the beam can be incident on the center of the end face, making full and effective use of the beam.

[0009] Simultaneously designing both the Y-axis and X-axis rotational degrees of freedom would make the fixing and clamping of the reflector difficult, meaning that the design of the fixing and clamping mechanism for the reflector would be challenging. The laser reflecting device of this application also includes a reflector fixing component. The reflector is disc-shaped, and the reflector fixing component is a spherical shell structure with both sides cut off from its outer surface. These two sides can receive and emit light. The reflector is fitted inside the reflector fixing component. Both the reflector and the reflector fixing component have pin holes, and the outer side of the reflector fixing component has a rotating pin.

[0010] An embodiment of this application also provides a laser, which includes the laser reflection device described above, through which the laser beam transmitted by the laser is transmitted in reverse in different optical fibers.

[0011] This application utilizes the detachable design of the pin hole and rotating pin, and cleverly leverages the special shapes of the reflector and its fixing components. By first rotating the reflector around the X or Y axis to the desired angle, and then removing the rotating pin from that axis, the pin hole on the axis corresponding to the removed pin will move when the rotating pin on the other axis is rotated. Since there is no movement of the rotating pin on the axis corresponding to the removed pin, there is no need to consider the impact of the rotating pin movement on the fixation and clamping of the laser reflecting device. This ingenious design allows the reflector to achieve two degrees of freedom of rotation around the X and Y axes, thus enabling simultaneous adjustment of the coordinates of the laser beam entering the receiving fiber in both the X and Y directions. Furthermore, it solves the problem of coexisting the two-dimensional motion of the laser reflecting device in adjusting the X and Y coordinates of the laser beam at the end face of the target fiber with the fixation and clamping mechanism of the laser reflecting device. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a first structural schematic diagram of the laser reflection device of this application;

[0014] Figure 2 This is a schematic diagram of the receiving optical fiber of the laser reflection device of this application;

[0015] Figure 3 This is a schematic diagram of the second structure of the laser reflection device of this application;

[0016] Figure 4 This is a schematic diagram of the mounting structure of the reflector in this application;

[0017] Figure 5 This is a schematic diagram of the third structure of the laser reflection device of this application.

[0018] Reference numerals: 1. Transmitting fiber; 2. Receiving fiber; 2a. End face; 3. Reflector; 4. Convex lens; 41. Convex lens fixing component; 5. Beam; 6. External fastener; 61. External fastener extension; 7. Collimator head; 8. Quartz cap end; 31. Reflector fastener; 31a. Outer surface; 32. Reflector retaining ring; 33. Fixing component retaining ring; 341. Pin hole; 342. Rotating pin; 343. Pin opening; 344. First groove; 345. Second groove. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] like Figure 1 As shown, Figure 1 This is a first structural schematic diagram of the laser reflection device of this application. The laser reflection device includes: a transmitting optical fiber 1, a receiving optical fiber 2, a reflecting mirror 3, and a convex lens 4. The beam emission and reception directions are opposite to each other. The convex lens 4 is located between the transmitting optical fiber 1 and the reflecting mirror 3, and also between the receiving optical fiber 2 and the reflecting mirror 3. The beam 5 is emitted from the transmitting optical fiber 1. After leaving the transmitting optical fiber 1, the beam 5 usually diffuses. After passing through the convex lens 4, the beam 5 becomes collimated light, then is reflected by the reflecting mirror 3, and is focused again after passing through the convex lens 4 before entering the center of the receiving optical fiber 2.

[0021] like Figure 2 As shown, Figure 2 This is a schematic diagram of the receiving optical fiber 2 of the laser reflecting device of this application. The receiving optical fiber 2 has an end face 2a. A three-dimensional coordinate system is set with the center of the end face 2a as the origin. The X-axis and Y-axis are located on the end face 2a and are perpendicular to each other, while the Z-axis passes through the center of the end face 2a and is perpendicular to the end face 2a. The reflector 3 of this application has two adjustable degrees of freedom. The coordinates in the X-axis direction and the Y-axis direction incident on the end face 2a can be changed by designing the degrees of freedom of rotation around the Y-axis and the degrees of freedom of rotation around the X-axis. The X-axis and Y-axis are also called the Y-axis rotation axis and the X-axis rotation axis, respectively. By adjusting the two degrees of freedom of the reflector 3, the coordinates of the beam 5 in the X-axis and Y-axis directions on the end face 2a can be changed. That is, when the reflector 3 rotates around the Y-axis, the coordinates of the beam 5 in the X-axis direction on the end face 2a can be changed, and when the reflector 3 rotates around the X-axis, the coordinates of the beam 5 in the Y-axis direction on the end face 2a can be changed.

[0022] However, in actual design, it is difficult to design a device that can simultaneously adjust the coordinates in the X-axis direction and the Y-axis direction for the fixing and clamping mechanism of the reflector 3. That is, it is difficult to coexist with the adjustment of two-dimensional coordinates and a stable fixing and clamping mechanism.

[0023] To solve the above problems, such as Figures 3-4 As shown, Figure 3 This is a second structural schematic diagram of the laser reflection device of this application. Figure 4 This is a schematic diagram of the mounting structure of the reflector according to this application. The laser reflecting device also includes a reflector fixing member 31. The reflector 3 is disc-shaped, and the reflector fixing member 31 is a spherical shell structure with both sides cut off from its outer surface 31a. These two sides can receive and emit light. The reflector 3 is sleeved inside the reflector fixing member 31. Both the reflector 3 and the reflector fixing member 31 have at least one pin hole 341 on their X-axis and Y-axis, and at least one rotating pin 342 on both their X-axis and Y-axis. The rotating pin 342 is detachably mounted on the pin hole 341. The reflector fixing member 31 has at least one first sliding groove 344, which surrounds the Y-axis.

[0024] In a specific embodiment, the rotating pin 342 can be detachably mounted on the pin hole 341 using a bolt or stud structure, which can be both fixed and removed.

[0025] To achieve the degree of freedom for the reflector 3 to rotate around both the X and Y axes, the rotation mechanism of this application is as follows: rotating the rotating pin 342 on the Y axis allows the reflector 3 to rotate around the Y axis, thereby changing the coordinates of the incident laser beam incident on the receiving fiber 2 in the X-axis direction. Simultaneously, the rotating pin 342 on the X axis moves along the first groove 344. When the beam 5 incident on the receiving fiber 2 reaches the ideal X coordinate position, the rotating pin 342 on the Y axis is removed, and then the rotating pin 342 on the X axis is rotated, allowing the reflector 3 to rotate around the X axis, thereby changing the coordinates of the incident laser beam incident on the receiving fiber 2 in the Y-axis direction. Ultimately, this allows the beam 5 incident on the receiving fiber 2 to reach the ideal position, improving the utilization efficiency of the beam 5.

[0026] In the embodiments of this application, since the rotating pin 342 on the Y-axis has been removed, when the rotating pin 342 on the X-axis is rotated, the pin hole 341 on the Y-axis will move accordingly, while the rotating pin 342 on the Y-axis does not move. Therefore, it is not necessary to consider the impact of the movement of the rotating pin 342 on the fixation and clamping of the laser reflection device.

[0027] It should be noted that the X-axis and Y-axis in this application are only defined directions and are interchangeable.

[0028] In a preferred embodiment, the reflector fixing member 31 is further provided with a second sliding groove 345. The first sliding groove 344 and the second sliding groove 345 are located on the annular surfaces of the reflector fixing member 31 and are perpendicular to each other. That is, the second sliding groove 345 is arranged around the X-axis of rotation. The rotating pin 342 on the X-axis of rotation and the rotating pin 342 on the Y-axis of rotation can slide on the first sliding groove 344 and the second sliding groove 345, respectively. This makes it easier to realize the degree of freedom of the reflector 3 to rotate around the X-axis and the Y-axis of rotation.

[0029] In a preferred embodiment, at least two pin holes 341 and two rotating pins 342 are provided on both the X-axis and Y-axis of the reflector 3, with the two pin holes 341 and the two rotating pins 342 positioned opposite each other. This facilitates better adjustment of the reflector 3 to generate degrees of freedom of rotation around the X-axis and Y-axis.

[0030] In an optional configuration, the reflector 3 has a reflective film only on the side closest to the transmitting optical fiber 1 and the receiving optical fiber 2. The light beam 5 is reflected from the transmitting light beam 1 through the reflective film on the reflector 3 to the receiving optical fiber 2. The maximum rotation angle of the reflector 3 around the X-axis and Y-axis is 90°.

[0031] In an optional configuration, reflective films are provided on both sides of the reflector 3. The light beam 5 is reflected from the emitting light beam 1 through the reflective film on the reflector 3 to the receiving optical fiber 2. The maximum rotation angle of the reflector 3 around the X-axis and Y-axis is 180 degrees.

[0032] In a preferred embodiment, the laser reflecting device further includes an outer fastener 6, which is spherical in shape and is fitted onto the outside of the reflector fixing member 31. The pin hole 341 and the first sliding groove 344 extend to the outer fastener 6. When a second sliding groove 345 is provided, the second sliding groove 345 also extends to the outer fastener 6. In this embodiment, the design of adding an outer fastener 6 to the laser reflecting device can better maintain the stability of the overall laser reflecting device, and the fixing and clamping of the reflector 3 will be more stable, and the reliability of the rotation of the reflector 3 will also be better.

[0033] like Figure 3 As shown, in a specific embodiment, the laser reflecting device further includes a reflector pressure ring 32, which stably seals and fixes the reflector 3 in the position after the reflector 3 rotates around the X and Y rotation axes to reach the ideal position.

[0034] In a specific embodiment, the laser reflecting device further includes a fixing ring 33, which forms a stable and sealed state for the reflector fixing member 31.

[0035] like Figure 5 As shown, in a specific embodiment, the laser reflection device further includes a quartz cap end 8, one end of which is fixed and clamps the transmitting optical fiber 1 and the receiving optical fiber 2, so as to stably fix the transmitting optical fiber 1 and the receiving optical fiber 2 without affecting the transmission direction of the beam 5.

[0036] In a specific embodiment, a collimator 7 is provided on the outer side of the quartz cap end 8, and the outer fastener 6 has an outer fastener extension 61. The collimator 7 is located on the inner side of the outer fastener extension 61, which provides a stable fixation for the quartz cap end 8.

[0037] In a specific embodiment, the convex lens 4 is further provided with a convex lens fixing member 41, which makes the convex lens 4 form a more stable state.

[0038] In a specific embodiment, the rotating pin 342 is provided with a pin opening 343. The pin opening 343 can be rotated by using a tool, thereby facilitating the twisting of the rotating pin 342 and driving the reflector 3 to rotate around the X rotation axis or the Y rotation axis.

[0039] An embodiment of this application also provides a laser, which includes the laser reflection device described above, through which the laser beam 5 transmitted by the laser is transmitted in reverse in different optical fibers.

[0040] It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Positional relational terms such as "up," "down," "left," "right," "front," "back," "inner," and "outer" are used to facilitate the reader's understanding of the orientation of the product structure, and do not necessarily require the product structure to actually be in that direction. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, thereby including elements inherent in a process, method, article, or device that includes a list of elements. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or device that includes said element. Additionally, the parts of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.

[0041] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made to this application without departing from the principles of this application, and the various embodiments in this application can be combined. These improvements, modifications, and combinations also fall within the protection scope of the claims of this application. That is, the claims of this application can arbitrarily combine the embodiments of this application, and are not limited to the limited combinations of embodiments passed by this application.

Claims

1. A laser reflection device, characterized in that, include: The beam (5) is emitted and received in opposite directions. The convex lens (4) is located between the emitting fiber (1) and the reflecting fiber (3), and also between the receiving fiber (2) and the reflecting mirror (3). The beam (5) is emitted from the transmitting fiber (1). After leaving the transmitting fiber (1), the beam (5) becomes collimated after passing through the convex lens (4), then is reflected after encountering the reflector (3), and is focused after passing through the convex lens (4) again, and then enters the center of the receiving fiber (2). The receiving optical fiber (2) has an end face (2a). A three-dimensional coordinate system is set with the center of the end face (2a) as the origin. The X-axis and Y-axis are located on the end face (2a) and are perpendicular to each other. The Z-axis passes through the center of the end face (2a) and is perpendicular to the end face (2a). The laser reflection device also includes a reflector fixing component (31). The reflector (3) is disc-shaped. The reflector fixing component (31) is a spherical shell structure with both sides cut off on the outer surface (31a). The two sides can receive and emit light. The reflector (3) is sleeved on the inner side of the reflector fixing component (31). The reflector (3) and the reflector fixing component (31) each have at least one pin hole (341) on the X-axis and Y-axis of rotation. The reflector fixing component (31) each has at least one rotating pin (342) on the X-axis and Y-axis of rotation. The rotating pin (342) is detachably provided on the pin hole (341). The mirror fixing member (31) is also provided with at least a first sliding groove (344), which is arranged around the X or Y rotation axis; the mirror fixing member (31) is also provided with a second sliding groove (345), the first sliding groove (344) and the second sliding groove (345) are perpendicular to each other on the annular surface of the mirror fixing member (31), and the rotating pin (342) on the X rotation axis and the rotating pin (342) on the Y rotation axis can slide on the first sliding groove (344) and the second sliding groove (345) respectively.

2. The laser reflection device as described in claim 1, characterized in that, The rotating pin (342) is detachably mounted on the pin hole (341) using a bolt structure or stud structure.

3. The laser reflection device as described in claim 1, characterized in that, The reflector (3) has a reflective film on only the side close to the transmitting fiber (1) and the receiving fiber (2). The light beam (5) is reflected from the transmitting fiber (1) through the reflective film on the reflector (3) to the receiving fiber (2). The maximum rotation angle of the reflector (3) around the X-axis and Y-axis is 90°.

4. The laser reflection device as described in claim 1, characterized in that, It also includes an outer fastener (6), which is a spherical shell type and is sleeved on the outside of the reflector fixing member (31). The rotating pin (342) is located on the outside of the outer fastener (6), and the pin hole (341) and the first sliding groove (344) extend to the outer fastener (6).

5. The laser reflection device as described in claim 4, characterized in that, The laser reflection device also includes a quartz cap end (8), one end of which is fixed and clamps the transmitting optical fiber (1) and the receiving optical fiber (2).

6. The laser reflection device as described in claim 5, characterized in that, The outer side of the quartz cap end (8) is also provided with a collimator (7), and the outer fastener (6) has an outer fastener extension (61). The collimator (7) is located inside the outer fastener extension (61) and forms a stable fixing effect on the quartz cap end (8).

7. The laser reflection device as described in claim 1, characterized in that, The rotating pin (342) is provided with a pin opening (343). By using a tool to rotate the pin opening (343), it is easy to twist the rotating pin (342) and drive the reflector (3) to rotate around the X rotation axis or the Y rotation axis.

8. The laser reflection device as described in claim 1, characterized in that, The laser reflection device also includes a mirror pressure ring (32) and a fixing ring (33). After the mirror (3) rotates around the X and Y rotation axes to reach the ideal position, the mirror pressure ring (32) stably seals and fixes the mirror (3) in that position, and the fixing ring (33) forms a stable and fixed state for the mirror fixing component (31).

9. A laser, characterized in that, The laser reflector includes any one of claims 1-8, through which the laser beam (5) transmitted by the laser is transmitted in reverse in different optical fibers.

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