CN-116053896-B - Laser reflection device and laser

Abstract

The application provides a laser reflection device and a laser. The laser reflecting device provided by the application comprises a transmitting optical fiber, a receiving optical fiber, a reflecting mirror and a convex lens. The laser reflecting device further comprises a reflector fixing piece, the reflector is a round cake, the reflector fixing piece is a spherical shell structure with two sides cut off on the outer surface, light can be received and emitted from the two sides, the reflector is sleeved on the inner side of the reflector fixing piece, pin holes are formed in the reflector and the reflector fixing piece, and a rotary pin is arranged on the outer side of the reflector fixing piece. Simultaneously, the coordinate in the X-axis direction and the coordinate in the Y-axis direction when the laser enters the receiving optical fiber are adjusted by skillfully utilizing the special shape collocation of the reflecting mirror and the reflecting mirror fixing piece by utilizing the characteristic of the detachable design between the pin hole and the rotary pin. And the problem that the two-dimensional movement of the laser reflection device for adjusting the light beam and the fixation and clamping mechanisms of the laser reflection device coexist is solved.

Inventors

• HUANG GUOXI
• ZHOU WEIYUN
• LU HAILONG
• ZHANG FAN

Assignees

• 深圳公大激光有限公司

Dates

Publication Date

20260508

Application Date

20221217

Claims (9)

1. 1. The laser reflecting device is characterized by comprising an emitting optical fiber (1), a receiving optical fiber (2), a reflecting mirror (3) and a convex lens (4), wherein the emitting direction and the receiving direction of a light beam (5) are opposite to each other, and the convex lens (4) is positioned between the emitting optical fiber (1) and the reflecting mirror (3) and also positioned between the receiving optical fiber (2) and the reflecting mirror (3); The light beam (5) is emitted from the emitting optical fiber (1), the light beam (5) is changed into collimated light after leaving the emitting optical fiber (1) and passing through the convex lens (4), then reflected by the reflecting mirror (3), focused after passing through the convex lens (4), and then enters the center of the receiving optical fiber (2); The receiving optical fiber (2) is provided with an end face (2 a), a three-dimensional coordinate system is arranged by taking the center of the end face (2 a) as an origin, an X axis and a Y axis are positioned on the end face (2 a) and are mutually perpendicular, and a Z axis is perpendicular to the end face (2 a) through the center of the end face (2 a); The laser reflecting device further comprises a reflector fixing piece (31), wherein the reflector (3) is a round cake, the reflector fixing piece (31) is a spherical shell structure with two cut sides of an outer surface (31 a), the two sides can receive light and emit light, the reflector (3) is sleeved on the inner side of the reflector fixing piece (31), at least one pin hole (341) is formed in an X rotating shaft and a Y rotating shaft of the reflector (3) and the reflector fixing piece (31), at least one rotating pin (342) is arranged on the X rotating shaft and the Y rotating shaft of the reflector fixing piece (31), and the rotating pin (342) is detachably arranged on the pin hole (341); The mirror fixing piece (31) is further provided with at least a first chute (344), the first chute (344) is arranged around the X or Y rotating shaft, the mirror fixing piece (31) is further provided with a second chute (345), annular surfaces of the first chute (344) and the second chute (345) on the mirror fixing piece (31) are mutually perpendicular, and a rotating pin (342) on the X rotating shaft and a rotating pin (342) on the Y rotating shaft can slide on the first chute (344) and the second chute (345) respectively.
2. 2. The laser reflection device according to claim 1, wherein the rotation pin (342) is detachably disposed on the pin hole (341) by a bolt structure or a stud structure.
3. 3. A laser reflection device as claimed in claim 1, characterized in that the mirror (3) is provided with a reflecting film only on the side close to the transmitting optical fiber (1) and the receiving optical fiber (2), the light beam (5) being reflected from the transmitting optical fiber (1) to the receiving optical fiber (2) via the reflecting film on the mirror (3), the maximum rotation angle of the mirror (3) being 90 ° around the X-axis and the Y-axis.
4. 4. The laser reflection device according to claim 1, further comprising an outer fixing member (6), wherein the outer fixing member (6) is of a spherical shell type and is sleeved on the outer side of the reflector fixing member (31), the rotation pin (342) is arranged on the outer side of the outer fixing member (6), and the pin hole (341) and the first chute (344) extend to the outer fixing member (6).
5. 5. The laser reflection device according to claim 4, characterized in that the laser reflection device further comprises a quartz cap end (8), one end of the quartz cap end (8) being fixed, clamping the transmitting optical fiber (1) and the receiving optical fiber (2).
6. 6. The laser reflection device according to claim 5, wherein a collimating head (7) is further arranged at the outer side of the quartz cap end (8), the outer fixing member (6) is provided with an outer fixing member extending part (61), and the collimating head (7) is positioned at the inner side of the outer fixing member extending part (61) and has a stable fixing effect on the quartz cap end (8).
7. 7. A laser reflection device as claimed in claim 1, characterized in that the rotation pin (342) is provided with a pin opening (343), and the rotation pin opening (343) is rotated by means of a tool, so that the rotation pin (342) is twisted to drive the mirror (3) to perform an axial rotation around the X-axis or the Y-axis.
8. 8. The laser reflection device according to claim 1, further comprising a mirror press ring (32) and a fixing member press ring (33), wherein after the mirror (3) rotates around the X-axis and the Y-axis to a desired position, the mirror press ring (32) stably seals and fixes the mirror (3) at the desired position, and the mirror fixing member (31) is brought into a stable and fixed state by the fixing member press ring (33).
9. 9. A laser, characterized in that it comprises a laser reflection device according to any one of claims 1-8, by means of which the light beam (5) transmitted by the laser is transmitted in opposite directions in different optical fibers.

Description

Laser reflection device and laser Technical Field The application relates to the technical field of laser, in particular to a laser reflecting device and a laser. Background As laser technology has grown more and more mature, laser beams are increasingly being used to cut, weld, drill, mark, scribe, etc. workpieces made of a variety of materials. Conventional machining can create undesirable defects such as microcracks or burrs that can develop when the machined workpiece is subjected to forces, degrading and weakening the strength and quality of the machined workpiece. Laser machining minimizes such undesirable defects, is generally cleaner, and results in a smaller heat affected zone. Laser machining uses a focused laser beam to create precise cuts and holes with high quality edges that minimize the formation of unwanted defects. Fiber lasers have been widely used in industrial laser processing applications based on the characteristics of high power and high beam quality. Such as laser cutting and laser welding of metals and metal alloys. Typically the laser beam is transmitted in the forward direction in an optical fiber, but in some special applications it is also desirable to use a mirror to reverse the transmission of the laser beam, e.g., a reverse fiber coupler. In order to realize the reverse transmission of laser, a reflecting mirror is required to be used, a reflecting angle is formed during reflection, errors exist in manufacturing of used devices, the perfect fit requirement of the mounting angle is difficult to ensure when the devices are assembled, and the reflecting angle is required to be flexibly adjustable for multiple use sometimes so as to ensure that a light beam enters the center of a target optical fiber. In addition, as shown in fig. 1, the center of the target optical fiber is on the end face of the optical fiber, and belongs to two-dimensional coordinates, namely X, Y coordinates, so that the difficulty in adjusting the coordinates or angles of two dimensions of the existing optical device is great, and the accuracy of entering the light beam into the target coordinates cannot be ensured at the same time after the light beam is adjusted. Therefore, it is necessary to design a laser reflection device, which can adjust the two-dimensional movement of the laser beam in the X, Y direction of the end face of the target optical fiber, so as to solve the problem of flexible adjustment of the beam, and meanwhile, it is also necessary to set a fixing and clamping mechanism to solve the precision and stability of the beam reaching the target coordinates. Disclosure of Invention The application provides a laser reflection device and a laser. The laser reflecting device comprises a transmitting optical fiber, a receiving optical fiber, a reflecting mirror and a convex lens. The beam emission and reception directions are opposite to each other (it should be noted that the opposite directions are approximately opposite directions, and not the beam emission and reception directions must be exactly 180 ° opposite directions, for example, within 10 ° of 170 ° of opposite directions, and the opposite directions can be calculated as the opposite directions of the present application), and the convex lens is located between the emission optical fiber and the reflecting mirror, and also between the receiving optical fiber and the reflecting mirror. The light beam is emitted from the emitting optical fiber, and the light beam is diffused after leaving the emitting optical fiber, becomes collimated light after passing through the convex lens, is reflected after encountering the reflecting mirror, is focused after passing through the convex lens, and enters the center of the receiving optical fiber. The receiving optical fiber is provided with an end face, a three-dimensional coordinate system is arranged by taking the center of the end face as an origin, an X axis and a Y axis are positioned on the end face and are mutually perpendicular, and a Z axis passes through the center of the end face and is perpendicular to the end face. The reflecting mirror has two adjustable degrees of freedom, and the coordinates of the light beam on the end face in the X-axis direction and the coordinates of the light beam on the Y-axis direction can be changed respectively through the two adjustable degrees of freedom. According to the laser reflecting device, the coordinates of the light beam in the X-axis direction and the coordinates of the light beam in the Y-axis direction, which are incident on the end face, are changed by adjusting the rotation of the reflecting mirror 3 around the Y-axis and the rotation of the reflecting mirror around the X-axis, and then, the coordinates of the light beam in the X-axis direction and the coordinates of the light beam in the Y-axis direction, which are incident on the end face, are adjusted, so that the light beam can be incident on the center of the end face, and the light beam i