CN218976007U - Laser reflection device and laser - Google Patents

Abstract

The application provides a laser reflection device and a laser. The laser reflection device provided by the application comprises: transmitting optical fiber, receiving optical fiber, reflector and convex lens. The light beam emitting and receiving directions are opposite to each other, and the convex lens is positioned between the emitting optical fiber and the reflecting mirror and also positioned 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 mirror is adjusted to rotate around the Y axis or the X axis, and the mirror is adjusted to rotate around the Z axis, so that the coordinate of the light beam in the X axis direction and the coordinate of the light beam in the Y axis direction of the end face are adjusted, the light beam can be incident to the center of the end face, and the light beam is fully and effectively utilized.

Description

Laser reflection device and laser

Technical Field

The application relates to the technical field of lasers, in particular to a laser reflection 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 current existing optical device has great difficulty in adjusting angles of two dimensions at the same time, 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 problem that the beam reaches the accuracy and stability of the target coordinates.

Disclosure of Invention

The application provides a laser reflection device and a laser. The laser reflection device provided by the application comprises: transmitting optical fiber, receiving optical fiber, reflector and 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 directions, and not the beam emission and reception directions must be exactly 180 ° opposite directions, for example, within 10 ° of 170 ° of opposite directions may be calculated as opposite directions described herein), 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 through the two adjustable degrees of freedom respectively.

This application is different with prior art lies in, the laser reflecting device of this application through the adjustment mirror 3 is rotatory around the Y axle or is rotatory around the X axle, changes the coordinate on the X axle direction or the coordinate on the Y axle direction that the light beam was incident on the terminal surface, in addition, still through the adjustment mirror 3 is rotatory around the Z axle, changes the coordinate on the X axle direction and the coordinate on the Y axle direction that the light beam was incident on the terminal surface simultaneously, and then, all adjusts the coordinate on the X axle direction and the coordinate on the Y axle direction that the light beam was incident on the terminal surface for the light beam can be incident to the center of terminal surface, make full use of the light beam.

The freedom degree of rotation around the Y axis and the freedom degree of rotation around the X axis are designed simultaneously, so that the fixing and clamping of the reflector are difficult, namely, the fixing and clamping mechanism for manufacturing the reflector is difficult to design. Meanwhile, the freedom degree of rotation around the Y axis or the freedom degree of rotation around the X axis is designed, and the freedom degree of rotation around the Z axis is also designed, so that the difficulty requirement on fixing and clamping the reflector is reduced.

The embodiment of the application also provides a laser, which comprises the laser reflecting device of the embodiment, and the laser reflecting device enables the light beam transmitted by the laser to be transmitted in different optical fibers in a reverse direction.

Drawings

For a clearer description of embodiments of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description that follow are only some embodiments of the present application, and that other drawings may be obtained from these drawings by a person of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic view of a first structure of a laser reflection device of the present application;

FIG. 2 is a schematic view of a receiving fiber of a laser reflection device according to the present application;

FIG. 3 is a schematic view of a second structure of the laser reflection device of the present application;

FIG. 4 is a schematic view of a third structure of the laser reflection device of the present application;

fig. 5 is a schematic diagram of a fixing structure of a reflector of the present application.

Reference numerals: 1. the optical fiber module comprises an emitting optical fiber, 2, a receiving optical fiber, 2a, an end face, 3, a reflecting mirror, 4, a convex lens, 5, a light beam, 6, a Z-axis rotating component, 7, a collimating head, 8, a quartz cap end, 31, a reflecting mirror fixing piece, 31a, an outer surface, 32, a reflecting mirror pressing ring, 33, a pin pressing ring, 34, a rotating pin, 341 and a pin opening.

Detailed Description

In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

As shown in fig. 1, fig. 1 is a first schematic structural diagram of a laser reflection device of the present application, where 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 light beam emitting and receiving directions 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 diffused after leaving the emitting optical fiber 1, the light beam 5 is changed into collimated light after 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.

As shown in fig. 2, fig. 2 is a schematic structural diagram of a receiving fiber 2 of the laser reflection device of the present application, where the receiving fiber 2 has an end face 2a, a three-dimensional coordinate system is set with the center of the end face 2a as an origin, the X-axis and the Y-axis are located on the end face 2a and perpendicular to each other, and the Z-axis is perpendicular to the end face 2a through the center of the end face 2a. In connection with fig. 1 and 2, the mirror 3 of the present application has two adjustable degrees of freedom by which the coordinates in the X-axis direction and the coordinates in the Y-axis direction of the light beam 5 incident on the end face 2a can be changed, respectively. In general, the coordinates in the X-axis direction and the coordinates in the Y-axis direction incident on the end face 2a can be changed by designing the degree of freedom of rotation about the Y-axis and the degree of freedom of rotation about the X-axis, which are also referred to as a Y-axis and an X-axis, respectively. By adjusting the two degrees of freedom of the mirror 3 such that the coordinates of the light beam 5 in the X-axis, Y-axis direction on the end face 2a are changed, that is, the coordinates of the light beam 5 in the X-axis direction on the end face 2a can be changed when the mirror 3 rotates around the Y-axis, and the coordinates of the light beam 5 in the Y-axis direction on the end face 2a can be changed when the mirror 3 rotates around the X-axis.

In an alternative, the reflecting 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 is reflected from the transmitting optical fiber 1 to the receiving optical fiber 2 through the reflecting film on the reflecting mirror 3, and the maximum rotation angle of the reflecting mirror 3 around the X axis and the Y axis is 90 degrees.

In an alternative scheme, reflecting films are arranged on two sides of the reflecting mirror 3, the light beam 5 is reflected from the transmitting optical fiber 1 to the receiving optical fiber 2 through the reflecting films on the reflecting mirror 3, and the maximum rotation angle of the reflecting mirror 3 around the X axis and the Y axis is 180 degrees.

However, designing the degree of freedom of rotation about the Y axis and the degree of freedom of rotation about the X axis simultaneously will cause difficulty in fixing and holding the mirror 3.

In order to solve the above-mentioned problems, as shown in fig. 3 to 5, fig. 3 is a second schematic structural view of the laser reflection device of the present application, fig. 4 is a third schematic structural view of the laser reflection device of the present application, and fig. 5 is a fixing structure schematic view of the reflection mirror of the present application. The laser reflecting device further comprises a reflecting mirror fixing piece 31 and a Z-axis rotating component 6, wherein the Z-axis rotating component 6 is cylindrical, and when the Z-axis rotating component 6 rotates around the Z axis, the reflecting mirror 3 can be driven to rotate around the Z axis, so that the degree of freedom of the reflecting mirror 3 around the Z axis is generated. The outer surface 31a of the mirror holder 31 has a cylindrical or at least spherical structure with one cut-away side, and is fitted inside the cylindrical Z-axis rotating member 6, and the Z-axis rotating member 6 and the mirror holder 31 have openings on the sides near the transmitting optical fiber 1 and the receiving optical fiber 2, from which the light beam 5 enters and exits. The rotation pin 34 is further arranged on the reflector fixing piece 31, and based on the connection design of the Z-axis rotation component 6 and the reflector fixing piece 31, when the outer surface 31a of the reflector fixing piece 31 is cylindrical, the reflector fixing piece 31 can drive the reflector 3 to rotate around the axis of the rotation pin 34, so that the degree of freedom in one direction of the X-axis or the Y-axis can be generated, at the moment, the fixing and clamping of the laser reflecting device are easier to design, and the integral precision and stability of the laser reflecting device can be ensured.

When the outer surface 31a of the mirror fixing member 31 is of a spherical structure with at least one side cut away, the plane formed by the side cut away is perpendicular to the Z rotation axis, so that the mirror fixing member 31 can be designed to drive the mirror 3 to rotate around the axis of the rotation pin 34, a degree of freedom in one direction of the X rotation axis or the Y rotation axis can be theoretically generated, and compared with the mirror fixing member 31 with the cylindrical outer surface 31a, at this time, the fixing and clamping of the laser reflecting device are difficult to design, the stability of the device can be reduced, and the area of the mirror 3 capable of reflecting the light beam 5 can be reduced.

When the coordinates of the transmitting optical fiber 1 and the receiving optical fiber 2 in the Y axis are different and the coordinates in the X axis are the same, as shown in fig. 3, the coordinates in the Y axis direction of the light beam 5 incident on the end face 2a may be changed by rotating the mirror 3 about the X axis, and the coordinates in the X axis and Y axis direction of the light beam 5 incident on the end face 2a may be changed by rotating the mirror about the Z axis, so that the light beam 5 may be incident on the center of the end face 2a, thereby making full use of the light beam 5.

In addition, when the coordinates of the transmitting optical fiber 1 and the receiving optical fiber 2 are different in the Y axis and the coordinates are the same in the X axis, the coordinates in the X axis direction of the light beam 5 incident on the end face 2a can be changed by rotating the adjustment mirror 3 around the Y axis.

However, as shown in fig. 1, the reflecting mirror 3 needs to be disposed obliquely to the outgoing light beam 5 of the emitting optical fiber 1, and at this time, the coordinates in the X-axis and Y-axis directions of the light beam 5 incident on the end face 2a can be changed when rotated about the Z-axis, and the light beam 5 can be made incident on the center of the end face 2a, thereby making full use of the light beam 5. That is, if the reflecting mirror 3 and the outgoing light beam 5 of the emitting optical fiber 1 are disposed right vertically, rotation around the Y axis and rotation around the Z axis can change only the coordinates in the x axis direction, cannot change the coordinates in the Y axis direction, and the light beam 5 cannot enter the receiving optical fiber 2.

In the preferred scheme, when the coordinates of the transmitting optical fiber 1 and the receiving optical fiber 2 on the Y axis are different and the coordinates on the X axis are the same, the adjusting reflecting mirror 3 rotates around the Y axis and rotates around the Z axis, one side of the reflecting mirror 3, which is close to the transmitting optical fiber 1, is obliquely arranged to the transmitting optical fiber 1, at the moment, the angle of rotation is not required to be too large, and the light beam 5 can enter the receiving optical fiber 2, so that the design difficulty of the fixing and clamping mechanism is reduced.

Similarly, when the coordinates of the transmitting optical fiber 1 and the receiving optical fiber 2 on the X axis are different and the coordinates on the Y axis are the same, the similar problem may be solved, that is, the X axis and the Y axis are defined directions and are interchangeable, which is not described herein.

As shown in fig. 3, in a specific embodiment, the laser reflection device further includes a quartz cap end 8, where one end of the quartz cap end 8 is used to fix and clamp the transmitting optical fiber 1 and the receiving optical fiber 2, so that the transmitting optical fiber 1 and the receiving optical fiber 2 are stably fixed, and the transmission direction of the light beam 5 is not affected.

In a specific embodiment, the outer side of the quartz cap end 8 is further provided with a collimating head 7, and the collimating head 7 is located at the inner side of the Z-axis rotating component 6 and has a stable fixing effect on the quartz cap end 8.

In a specific embodiment, the laser reflection device further comprises a reflector pressing ring 32, and after the reflector 3 rotates around the X rotation axis or the Y rotation axis to reach a desired position, the reflector 3 is stably sealed and fixed at the position.

In a specific embodiment, the laser reflection device further includes a pin pressing ring 33, and after the rotating pin 34 twists to reach a preset position, the rotating pin 34 is formed into a stable seal by the pin pressing ring 33 and is fixed at the preset position.

In a specific embodiment, as shown in fig. 5, the rotation pin 34 is provided with a pin opening 341, and the pin opening 341 may be turned by using a tool to turn the rotation pin 34, so as to drive the mirror to rotate around the X rotation axis or the Y rotation axis to perform axial rotation.

Embodiments of the present application also provide a laser, which includes the laser reflection device of the above embodiments, through which the light beam 5 transmitted by the laser is reversely transmitted in a different optical fiber.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Positional relationship terms such as up, down, left, right, front, back, interior, exterior, etc. are used for the convenience of the reader to better understand the positional relationship of the product structure, and do not necessarily require that the product structure actually must be in that orientation. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is inherent to. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or device that comprises the element. In addition, the parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of the corresponding technical solutions in the prior art, are not described in detail, so that redundant descriptions are avoided.

Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that, for a person skilled in the art, several improvements and modifications may be made to the present application and the embodiments in the present application may be combined without departing from the principles of the present application, and these improvements, modifications and combinations also fall within the protection scope of the claims of the present application, i.e. the claims of the present application may arbitrarily combine the embodiments of the present application, and are not limited to the limited combination of the embodiments passed by the present application.

Claims (10)

1. A laser reflection device, comprising: the optical fiber transmitting device comprises an optical transmitting fiber (1), an optical receiving fiber (2), a reflecting mirror (3) and a convex lens (4), wherein the transmitting and receiving directions of a light beam (5) are opposite to each other, and the convex lens (4) is positioned between the optical transmitting fiber (1) and the reflecting mirror (3) and also positioned between the optical receiving 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 mirror (3) has two adjustable degrees of freedom by which the coordinates in the X-axis direction and the coordinates in the Y-axis direction of the light beam (5) incident on the end face (2 a) are changed.

2. 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.

3. A laser reflection device as claimed in claim 1, characterized in that the reflecting mirror (3) is provided with reflecting films on both sides, the light beam (5) being reflected from the transmitting optical fiber (1) to the receiving optical fiber (2) via the reflecting film on the reflecting mirror (3), the maximum rotation angle of the reflecting mirror (3) around the X-axis and the Y-axis being 180 degrees.

4. The laser reflection device according to claim 1, further comprising a mirror fixing member (31) and a Z-axis rotating member (6), wherein the Z-axis rotating member (6) is cylindrical, and when the Z-axis rotating member (6) rotates around the Z-axis, the mirror (3) is driven to rotate around the Z-axis, and the degree of freedom of the mirror (3) around the Z-axis is generated;

the outer surface (31 a) of the reflector fixing piece (31) is of a cylindrical or at least one cut-away spherical structure and is sleeved on the inner side of the cylindrical Z-axis rotating component (6);

the Z-axis rotating component (6) and the reflector fixing piece (31) are provided with openings at one side close to the transmitting optical fiber (1) and the receiving optical fiber (2), and the light beam (5) enters and exits from the openings;

the reflector fixing piece (31) is provided with a rotary pin (34), and based on the connection design of the Z-axis rotary part (6) and the reflector fixing piece (31), when the outer surface (31 a) of the reflector fixing piece (31) is cylindrical, the reflector fixing piece (31) drives the reflector (3) to rotate around the axis of the rotary pin (34), so that the degree of freedom in one direction of an X rotary shaft or a Y rotary shaft is generated;

the mirror (3) needs to form an oblique arrangement with the outgoing light beam (5) of the emitting fiber (1).

5. A laser reflection device as claimed in claim 4, characterized in that the adjustment mirror (3) is rotated about the Y-axis and about the Z-axis when the coordinates of the transmitting fiber (1) and the receiving fiber (2) are different in the Y-axis and identical in the X-axis, said mirror (3) being arranged obliquely to the transmitting fiber (1) near one side of the transmitting fiber (1).

6. 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).

7. The laser reflection device according to claim 6, wherein a collimating head (7) is further arranged on the outer side of the quartz cap end (8), and the collimating head (7) is positioned on the inner side of the Z-axis rotating component (6) to form a stable fixing effect on the quartz cap end (8).

8. The laser reflection device according to claim 1, further comprising a mirror press ring (32), wherein the mirror press ring (32) stably seals and fixes the mirror (3) at a desired position after the mirror (3) rotates around the X-axis or the Y-axis to the desired position;

the laser reflection device further comprises a pin pressing ring (33), and after the rotating pin (34) twists to reach a preset position, the rotating pin (34) is stably sealed and fixedly arranged at the position through the pin pressing ring (33).

9. The laser reflection device according to claim 7, wherein the rotation pin (34) is provided with a pin opening (341), and the pin opening (341) can be turned by using a tool to turn the pin opening (341) so as to twist the rotation pin (34) to drive the mirror to rotate around the X rotation axis or the Y rotation axis for axial rotation.

10. A laser, characterized in that it comprises a laser reflection device according to any one of claims 1-9, by means of which the light beam (5) transmitted by the laser is transmitted in opposite directions in different optical fibers.

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