CN216958847U - Optical path system of laser and laser - Google Patents

Abstract

The application discloses optical path system and laser instrument of laser instrument, optical path system include light emitting component, speculum and optical path increase component. The light emitting element can emit light, the reflector is arranged opposite to the light emitting surface of the light emitting element, and the reflector is used for reflecting the light. The optical path increasing element is positioned between the light-emitting element and the reflector and comprises a first reflecting surface, a plurality of middle reflecting surfaces and a second reflecting surface, the first reflecting surface is arranged opposite to the light-emitting surface of the light-emitting element, light rays enter the reflector after being reflected by the first reflecting surface, the middle reflecting surfaces and the second reflecting surface in sequence, and incident light rays of the first reflecting surface and emergent light rays of the middle reflecting surface of the second reflecting surface are positioned in the same plane. The optical path increasing element in the embodiment of the application can increase the optical path of light on the premise of not changing the distance between the slow axis collimating mirror and the light-emitting element, and meets the space requirement of the long focal length of the slow axis collimating mirror so as to reduce the size of an optical path system and a laser.

Description

Optical path system of laser and laser

Technical Field

The application belongs to the technical field of lasers, and particularly relates to an optical path system of a laser and the laser.

Background

In the existing semiconductor laser, laser emitted by a laser chip directly enters a slow axis collimating mirror after passing through a fast axis collimating mirror, and the laser chip, the fast axis collimating mirror and the slow axis collimating mirror are generally arranged on a straight line. With the increasing power of semiconductor lasers, the size of a light emitting area of a chip is increased, and in order to ensure the quality of output light beams, a slow-axis collimating mirror with a large focal length is required to compress the divergence angle of laser light. Accordingly, the slow axis collimator needs to be disposed at a position far away from the laser chip to satisfy the requirement of long focal length of the slow axis collimator, which may result in an oversized laser.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an optical path system of a laser and a laser, which can reduce the sizes of the optical path system and the laser.

In a first aspect, an embodiment of the present application provides an optical path system of a laser, including:

a light emitting element capable of emitting light;

the reflector is arranged opposite to the light-emitting surface of the light-emitting element and used for reflecting the light;

optical path increases the component, set up in light emitting component with between the speculum, optical path increases the component and includes first plane of reflection, a plurality of middle plane of reflection and second plane of reflection, first plane of reflection with light emitting component's play plain noodles sets up relatively, light warp get into after first plane of reflection, a plurality of middle plane of reflection and the second plane of reflection in proper order the speculum, the incident light of first plane of reflection with the emergent light of second plane of reflection is located the coplanar.

Optionally, the optical path increasing element further includes a prism, the prism is provided with an incident surface, an emergent surface, two intermediate reflecting surfaces, namely a first intermediate reflecting surface and a second intermediate reflecting surface, the first reflecting surface is spaced from the first intermediate reflecting surface and at least partially arranged oppositely, the second reflecting surface is spaced from the second intermediate reflecting surface and at least partially arranged oppositely, the first reflecting surface, the incident surface, the first intermediate reflecting surface, the second intermediate reflecting surface, the emergent surface and the second reflecting surface are sequentially connected, the first reflecting surface and the second reflecting surface are obliquely arranged and connected, and the light enters the optical path increasing element through the incident surface and sequentially passes through the first reflecting surface, the emergent surface and the second reflecting surface, The first intermediate reflecting surface, the second intermediate reflecting surface and the second reflecting surface are reflected and then emitted from the emitting surface.

Optionally, the light emitting element emits the light traveling in the horizontal direction, the incident surface is vertically disposed, the first intermediate reflecting surface is disposed above the first reflecting surface, and the second intermediate reflecting surface is disposed above the second reflecting surface.

Optionally, the first reflecting surface and the incident surface are obliquely arranged, and an included angle between the first reflecting surface and the incident surface is greater than or equal to a preset angle.

Optionally, the exit surface is an arc surface.

Optionally, an anti-reflection film is disposed on the incident surface and/or the exit surface.

Optionally, the number of the intermediate reflecting surfaces is two, and the intermediate reflecting surfaces are respectively a first intermediate reflecting surface and a second intermediate reflecting surface, the first reflecting surface and the first intermediate reflecting surface are arranged at an interval and at least partially opposite to each other, the second reflecting surface and the second intermediate reflecting surface are arranged at an interval and at least partially opposite to each other, the first reflecting surface and the second reflecting surface are obliquely arranged and connected, the first intermediate reflecting surface and the second intermediate reflecting surface are obliquely arranged and connected, and the light is reflected on the first reflecting surface, the first intermediate reflecting surface, the second intermediate reflecting surface and the second reflecting surface in sequence;

or the number of the plurality of intermediate reflecting surfaces is three, and the intermediate reflecting surfaces are respectively a third intermediate reflecting surface, a fourth intermediate reflecting surface and a fifth intermediate reflecting surface which are sequentially connected, the first reflecting surface and the third intermediate reflecting surface are arranged at intervals and at least partially opposite to each other, the second reflecting surface and the fifth intermediate reflecting surface are arranged at intervals and at least partially opposite to each other, the first reflecting surface and the second reflecting surface are obliquely arranged and connected, and the light rays are sequentially reflected on the first reflecting surface, the third intermediate reflecting surface, the fourth intermediate reflecting surface, the fifth intermediate reflecting surface and the second reflecting surface;

or, the quantity of a plurality of intermediate reflection faces is four, is sixth intermediate reflection face, seventh intermediate reflection face, eighth intermediate reflection face and the ninth intermediate reflection face that connects gradually respectively, first reflection face with sixth intermediate reflection face interval and at least part set up relatively, the second reflection face with ninth intermediate reflection face interval and at least part set up relatively, first reflection face with the second reflection face slope sets up and connects, light is in proper order first reflection face, sixth intermediate reflection face, seventh intermediate reflection face, eighth intermediate reflection face, ninth intermediate reflection face and reflect on the second reflection face.

Optionally, the optical path system includes a plurality of optical path increasing elements, the optical path increasing elements are disposed adjacent to each other, and the light emitted from one optical path increasing element can enter the next optical path increasing element.

In a second aspect, an embodiment of the present application provides an optical path system of a laser, including:

a light emitting element capable of emitting light;

the reflector is arranged opposite to the light-emitting surface of the light-emitting element and used for reflecting the light;

the optical path increasing element is arranged between the light-emitting element and the reflector, and comprises a first reflecting surface, a first middle reflecting surface, a second middle reflecting surface and a second reflecting surface, wherein the first reflecting surface is arranged opposite to the light-emitting surface of the light-emitting element, the first middle reflecting surface is arranged above the first reflecting surface, the second middle reflecting surface is arranged on one side, close to the light-emitting element, of the first middle reflecting surface, the second reflecting surface is arranged below the second middle reflecting surface and is connected with the second middle reflecting surface, the first middle reflecting surface is arranged opposite to the second reflecting surface, the first reflecting surface is arranged opposite to the second middle reflecting surface, and the first reflecting surface and the second reflecting surface are arranged at intervals.

In a third aspect, an embodiment of the present application provides a laser, including:

a base;

a plurality of optical path system as above, it is a plurality of optical path system all set up in the base and with the base is connected, it is a plurality of optical path system is adjacent and interval sets up.

In an embodiment of the present application, an optical path system of a laser includes a light emitting element, a reflecting mirror, and an optical path increasing element. The light emitting element can emit light, the reflector is arranged opposite to the light emitting surface of the light emitting element, and the reflector is used for reflecting the light. The optical path increasing element is positioned between the light-emitting element and the reflector and comprises a first reflecting surface, a plurality of middle reflecting surfaces and a second reflecting surface, the first reflecting surface is arranged opposite to the light-emitting surface of the light-emitting element, light rays enter the reflector after being reflected by the first reflecting surface, the middle reflecting surfaces and the second reflecting surface in sequence, and incident light rays of the first reflecting surface and emergent light rays of the second middle reflecting surface are positioned in the same plane. The optical path increasing element in the embodiment of the application can fold back light emitted by the light emitting element among the first reflecting surface, the second reflecting surface and the plurality of middle reflecting surfaces, increases the optical path of the light on the premise of not changing the distance between the slow axis collimating mirror and the light emitting element, and meets the space requirement of the long focal length of the slow axis collimating mirror so as to reduce the sizes of an optical path system and a laser.

Drawings

The technical solutions and advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a laser provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an optical path system provided in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a first optical path increasing element according to an embodiment of the present disclosure.

Fig. 4 is a schematic diagram of light refraction in a first type of optical path increasing element.

Fig. 5 is a schematic structural diagram of a second optical path increasing element according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a third optical path increasing element according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a fourth optical path increasing element according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a fifth optical path increasing element according to an embodiment of the present application.

Fig. 9 is a schematic diagram of light refraction in a fifth type of optical path increasing element.

Fig. 10 is a schematic structural diagram of a sixth optical path increasing element according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the existing semiconductor laser, laser emitted by a laser chip directly enters a slow axis collimating mirror after passing through a fast axis collimating mirror, and the laser chip, the fast axis collimating mirror and the slow axis collimating mirror are generally arranged on a straight line. With the increasing power of semiconductor lasers, the size of the light emitting area of the chip is larger and larger, and in order to ensure the same beam quality output, the focal length of the slow-axis collimating mirror needs to be increased to compress the divergence angle of the combined beam, thereby resulting in a larger laser volume.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser according to an embodiment of the present disclosure. The laser 100 includes a base 1 and an optical system 2, the optical system 2 is disposed in the base 1 and connected to the base 1, it can be understood that the optical system 2 is used for generating laser light, and the base 1 is used for supporting and protecting the optical system 2. In order to improve the power of the laser, the number of the optical path systems 2 may be multiple, the optical path systems 2 are all disposed in the base 1 and connected to the base 1, and the multiple optical path systems 2 are disposed adjacent to each other and spaced apart from each other. Accordingly, the laser 100 may further include a beam combining mirror 3, and the beam combining mirror 3 is configured to combine the laser light emitted from the optical path systems 2 into one beam.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an optical path system according to an embodiment of the present disclosure, where the optical path system 2 includes a light emitting element 21, a reflector 25 and an optical path increasing element 24, where the light emitting element 21 is capable of emitting a light ray 22, the reflector 25 is disposed opposite to a light emitting surface of the light emitting element 21, and the reflector 25 is used for reflecting the light ray 22. Illustratively, the reflecting mirror 25 reflects the light rays to the beam combining mirror 3, so that the beam combining mirror 3 combines the light rays emitted from the respective optical path systems 2 into one beam.

Referring to fig. 2 and fig. 3, fig. 3 is a schematic structural diagram of a first optical path increasing element according to an embodiment of the present disclosure, in which an optical path increasing element 24 is located between the light emitting element 21 and the reflector 25, the optical path increasing element 24 includes a first reflecting surface 241, a plurality of intermediate reflecting surfaces, and a second reflecting surface 242, the first reflecting surface 241 is disposed opposite to the light emitting surface of the light emitting element 21, and the light 22 enters the reflector 25 after being sequentially reflected by the first reflecting surface 241, the plurality of intermediate reflecting surfaces, and the second reflecting surface 242.

The incident light ray of the first reflecting surface 241 and the exit light ray of the second reflecting surface 242 are located in the same plane, and this arrangement makes it possible to substantially align the components in the optical path system 2. The optical path system 2 needs to be installed and fixed in the base 1, and the arrangement is favorable for simplifying the installation of the optical path system 2.

In the related art, the slow axis collimating mirror in the high power laser has a long focal length, and correspondingly, the optical path of light is long, so that the slow axis collimating mirror needs to be arranged at a position far away from the light emitting chip to meet the space requirement of the long focal length of the slow axis collimating mirror. The light path is long, and the linear distance between the slow axis collimating mirror and the light emitting chip is long, so that the size of a finally designed light path system or laser is large, and the light path system or laser is not suitable for being used in narrow and small environments or under the condition of space limitation.

In the embodiment of the present application, the optical path increasing element 24 is disposed at the rear end of the light emitting element 21, and the light ray 22 is folded back multiple times in the optical path increasing element 24. On the premise of not changing the distance between the slow axis collimating mirror and the light emitting element 21, the optical path increasing element 24 can increase the optical path of the light 22, and the space requirement of the long focal length of the slow axis collimating mirror in a narrow space is met. In other words, in the embodiment of the present application, the focal length of the slow axis collimator does not change, and accordingly, the optical path of the optical fiber does not change, but the optical path increasing element 24 can "fold" the longer optical path, so that the distance between the slow axis collimator and the light emitting element 21 can be reduced, thereby reducing the size of the optical path system 2 and the laser 100.

Referring to fig. 3 and 4, fig. 4 is a schematic diagram illustrating light refraction in the first optical path increasing element. The optical path increasing element 24 further comprises a prism having an incident surface 248, an exit surface 249, the first reflecting surface 241, the second reflecting surface 242, and the plurality of intermediate reflecting surfaces including a first intermediate reflecting surface 2431 and a second intermediate reflecting surface 2432, the first reflecting surface 241 and the first intermediate reflecting surface 2431 being spaced apart from each other and at least partially disposed opposite each other, and the second reflecting surface 242 and the second intermediate reflecting surface 2432 being spaced apart from each other and at least partially disposed opposite each other. The first reflecting surface 241, the incident surface 248, the first intermediate reflecting surface 2431, the second intermediate reflecting surface 2432, the exit surface 249, and the second reflecting surface 242 are sequentially connected, and the first reflecting surface 241 and the second reflecting surface 242 are obliquely disposed and connected. The light ray 22 enters the optical path increasing element 24 through the incident surface 248, and is reflected by the first reflecting surface 241, the first intermediate reflecting surface 2431, the second intermediate reflecting surface 2432 and the second reflecting surface 242 in sequence and then exits through the exit surface 249.

The light emitting element 21 emits the light ray 22 traveling in the horizontal direction, the incident surface 248 is vertically disposed, that is, the light ray 22 is vertically incident on the incident surface 248 of the optical path increasing element 24, the first intermediate reflecting surface 2431 is disposed above the first reflecting surface 241, and the second intermediate reflecting surface 2432 is disposed above the second reflecting surface 242, that is, the optical path is "folded" in the vertical direction. Of course, the first intermediate reflecting surface 2431 may be disposed on the left or right side of the first reflecting surface 241, and correspondingly, the second intermediate reflecting surface 2432 may be disposed on the left or right side of the second reflecting surface 242, so that the optical path is "folded" in the horizontal direction.

Illustratively, light emitted from the first reflecting surface 241 is emitted to the first intermediate reflecting surface 2431 and reflected on the first intermediate reflecting surface 2431, light emitted from the first intermediate reflecting surface 2431 is emitted to the second intermediate reflecting surface 2432 and reflected on the second intermediate reflecting surface 2432, light emitted from the second intermediate reflecting surface 2432 is emitted to the second reflecting surface 242 and reflected on the second reflecting surface 242, and light emitted from the second reflecting surface 242 is emitted from the exit surface 249 out of the optical path increasing element 24. The first reflecting surface 241 may be disposed in parallel with the first intermediate reflecting surface 2431 so that the outgoing light from the first intermediate reflecting surface 2431 is parallel with the incident light from the first reflecting surface 241. The second reflecting surface 242 may be disposed in parallel with the second intermediate reflecting surface 2432, so that incident light on the second intermediate reflecting surface 2432 is parallel to emergent light on the second reflecting surface 242, and further incident light of the first reflecting surface 241 is parallel to emergent light of the second reflecting surface 242, the first reflecting surface 241, the second reflecting surface 242, the first intermediate reflecting surface 2431, and the second intermediate reflecting surface 2432 are symmetrically disposed, and further incident light of the first reflecting surface 241 and emergent light of the second reflecting surface 242 are located in the same horizontal plane.

As shown in fig. 4, when the distance between the exit surface 249 and the entrance surface 248 is L, the distance between the reflection point a of the first reflection surface 241 and the reflection point B of the first intermediate reflection surface 2431 is H, and the distance between the reflection point D of the second reflection surface 242 and the reflection point C of the second intermediate reflection surface 2432 is H, the optical path length of the light ray 22 in the optical path increasing element 24 is L + 2H. And the distance between the exit surface 249 and the entrance surface 248 is L, that is, the optical path increasing element 24 can make the optical path of L +2H be only L in the distance in the horizontal direction, effectively reducing the size of the optical path system 2 and the laser 100.

When the light ray 22 enters the optical path increasing element 24 from the incident surface 248 perpendicularly, the angle between the first reflecting surface 241 and the incident surface 248 is equal to the incident angle of the light ray 22 to the first reflecting surface 241. It should be noted that, in order to enable the light ray 22 to be totally reflected on the first reflecting surface 241, an incident angle of the light ray 22 to the first reflecting surface 241 needs to be greater than or equal to a preset angle, and correspondingly, an included angle between the first reflecting surface 241 and the incident surface 248 is greater than or equal to the preset angle. The size of the preset angle is related to the refractive index of the material of the prism, for example, if the refractive index of the material of the prism is 1.45, the corresponding preset angle is 43.6 degrees, and the included angle between the first reflecting surface 241 and the incident light is greater than or equal to 43.6 degrees. If the refractive index of the prism material is 1.9, the corresponding predetermined angle is 31.7 degrees, and the included angle between the first reflection surface 241 and the incident surface 248 is greater than or equal to 31.7 degrees.

It will be appreciated that when the light ray 22 is fully emitted on the first reflecting surface 241, the light ray 22 will not "leak" from the optical path increasing element 24, and the loss of laser power can be avoided. The light ray 22 also needs to be totally reflected on the second intermediate reflecting surface 2432, the first intermediate reflecting surface 2431, and the second reflecting surface 242, so as to ensure the power of the outgoing laser light. The positions of the second reflecting surface 242 and the plurality of intermediate reflecting surfaces need to be set according to the condition of occurrence of total reflection, which is not described herein.

An anti-reflection film is disposed on the incident surface 248 and/or the exit surface 249 to prevent the light ray 22 from reflecting on the incident surface 248 and/or the exit surface 249, thereby minimizing the loss of power of the light ray 22 or damaging components in the laser 100.

Please refer to fig. 5, wherein fig. 5 is a schematic structural diagram of a second optical path increasing element according to an embodiment of the present application. The exit surface 249 may be planar or curved. When the exit surface 249 is a plane, the optical path increasing element 24 is only for reducing the size of the optical path system 2, and the optical path increasing element 24 cannot compress the divergence angle of the light ray 22 in the slow axis direction. Therefore, when the exit surface 249 is a plane, the optical path system 2 further includes a slow axis collimator disposed between the exit surface 249 and the reflector 25, and the slow axis collimator compresses the divergence angle of the light 22 on the slow axis and emits the compressed light to the reflector 25. Of course, the exit surface 249 may also be a curved surface, so that the optical path increasing element 24 has the function of a slow-axis collimating mirror, and at this time, the optical path system 2 does not need to be additionally provided with a slow-axis collimating mirror, which can reduce the number of parts of the optical path system 2 and simplify the assembly process of the optical path system 2 and the base 1.

The optical path increasing element 24 may be adhered to the base 1, or a mounting portion with a shape matching with the optical path increasing element 24 may be provided on the base 1 to mount the optical path increasing element 24, and the specific connection structure and connection form are not limited herein.

The optical path increasing element 24 may also be deformed in other ways to further increase the optical path. For example, please refer to fig. 6, fig. 6 is a schematic structural diagram of a third optical path increasing element according to an embodiment of the present application. The plurality of intermediate reflecting surfaces comprise a third intermediate reflecting surface 2433, a fourth intermediate reflecting surface 2434 and a fifth intermediate reflecting surface 2435 which are connected in sequence, the first reflecting surface 241 and the third intermediate reflecting surface 2433 are arranged at a distance and at least partially opposite to each other, the second reflecting surface 242 and the fifth intermediate reflecting surface 2435 are arranged at a distance and at least partially opposite to each other, the first reflecting surface 241 and the second reflecting surface 242 are obliquely arranged and connected, and the light ray 22 is reflected on the first reflecting surface 241, the third intermediate reflecting surface 2433, the fourth intermediate reflecting surface 2434, the fifth intermediate reflecting surface 2435 and the second reflecting surface 242 in sequence.

Alternatively, referring to fig. 7, fig. 7 is a schematic structural diagram of a fourth optical path increasing element according to an embodiment of the present application. The plurality of intermediate reflecting surfaces comprise a sixth intermediate reflecting surface 2436, a seventh intermediate reflecting surface 2437, an eighth intermediate reflecting surface 2438 and a ninth intermediate reflecting surface 2439 which are connected in sequence, the first reflecting surface 241 and the sixth intermediate reflecting surface 2436 are spaced and at least partially arranged oppositely, the second reflecting surface 242 and the ninth intermediate reflecting surface 2439 are spaced and at least partially arranged oppositely, the first reflecting surface 241 and the second reflecting surface 242 are obliquely arranged and connected, and the light ray 22 is reflected on the first reflecting surface 241, the sixth intermediate reflecting surface 2436, the seventh intermediate reflecting surface 2437, the eighth intermediate reflecting surface 2438, the ninth intermediate reflecting surface 2439 and the second reflecting surface 242 in sequence.

Alternatively, referring to fig. 8 and fig. 9, fig. 8 is a schematic structural diagram of a fifth optical path increasing element according to an embodiment of the present application, and fig. 9 is a schematic diagram of light refracted in the fifth optical path increasing element. Such that the light rays 22 are folded in a horizontal direction, the plurality of intermediate reflective surfaces includes a first intermediate reflective surface 2431 and a second intermediate reflective surface 2432. The first reflecting surface 241 is opposite to the light emitting surface of the light emitting element 21, the first intermediate reflecting surface 2431 is disposed above the first reflecting surface 241, the second intermediate reflecting surface 2432 is disposed on one side of the first intermediate reflecting surface 2431 close to the light emitting element 21, the second reflecting surface 242 is disposed below the second intermediate reflecting surface 2432 and connected to the second intermediate reflecting surface 2432, the first intermediate reflecting surface 2431 is opposite to the second reflecting surface 242, the first reflecting surface 241 is opposite to the second intermediate reflecting surface 2432, and the first reflecting surface 241 and the second reflecting surface 242 are spaced apart from each other. It should be noted that the incident light ray 22 on the first reflecting surface 241 and the emergent light ray 22 on the second reflecting surface 242 are not on the same plane, but are close to each other, so that the elements in the optical path system 2 can be ensured to be approximately on the same straight line.

For example, referring to fig. 10, and fig. 10, a schematic structural diagram of a sixth optical path increasing element provided in the embodiment of the present application is shown, the optical path increasing element 24 may include a first reflection plate 244 including a first reflection surface 241, and the first reflection plate 244 may be provided with a reflective coating or a reflective mirror to reflect the light 22, where the specific reflection manner is not limited herein. Accordingly, the second reflecting surface 242 and the plurality of intermediate reflecting surfaces may be arranged as described above.

Illustratively, the optical path increasing element 24 includes a first reflective plate 244, a second reflective plate 245 and a plurality of intermediate reflective plates, the first reflective plate 244 is provided with a first reflective surface 241, the second reflective plate 245 is provided with a second reflective surface 242, the plurality of intermediate reflective plates include a first intermediate reflective plate 2461 and a second intermediate reflective plate 2462, the first intermediate reflective plate 2461 is provided with a first intermediate reflective surface 2431, and the second intermediate reflective plate 2462 is provided with a second intermediate reflective surface 2432. The first reflection plate 244 is spaced apart from and at least partially opposite to the first intermediate reflection plate 2461, so that the first reflection surface 241 is spaced apart from and at least partially opposite to the first intermediate reflection surface 2431. The second reflective plate 245 is spaced from and at least partially opposite the second intermediate reflective plate 2462, such that the second reflective surface 242 is spaced from and at least partially opposite the second intermediate reflective surface 2432. The first reflective plate 244 is obliquely disposed and connected to the second reflective plate 245, the first intermediate reflective plate 2461 is obliquely disposed and connected to the second intermediate reflective plate 2462, and the light ray 22 is sequentially reflected by the first reflective surface 241, the first intermediate reflective surface 2431, the second intermediate reflective surface 2432, and the second reflective surface 242. The optical path increasing element 24 may further include a connection portion 247, where the connection portion 247 is used to connect the first reflection plate 244 and the first intermediate reflection plate 2461, and the connection portion 247 is also used to connect the second reflection plate 245 and the second intermediate reflection plate 2462.

Or, the light ray 22 is folded in the horizontal direction, the first reflection surface 241 is disposed opposite to the light emitting surface of the light emitting element 21, the first intermediate reflection surface 2431 is disposed above the first reflection surface 241, the second intermediate reflection surface 2432 is disposed on a side of the first intermediate reflection surface 2431 close to the light emitting element 21, the second reflection surface 242 is disposed below the second intermediate reflection surface 2432 and connected to the second intermediate reflection surface 2432, the first intermediate reflection surface 2431 is disposed opposite to the second reflection surface 242, the first reflection surface 241 is disposed opposite to the second intermediate reflection surface 2432, and the first reflection surface 241 and the second reflection surface 242 are disposed at an interval.

It should be noted that the same modification as the prism may also be adopted in this arrangement, for example, the optical path increasing element 24 is provided with a third intermediate reflecting plate, a fourth intermediate reflecting plate and a fifth intermediate reflecting plate which are connected in sequence, the third intermediate reflecting plate is provided with a third intermediate reflecting surface 2433, the fourth intermediate reflecting plate is provided with a fourth intermediate reflecting surface 2434, and the fifth intermediate reflecting plate is provided with a fifth intermediate reflecting surface 2435. The first reflecting surface 241 and the third intermediate reflecting surface 2433 are spaced and at least partially disposed oppositely, the second reflecting surface 242 and the fifth intermediate reflecting surface 2435 are spaced and at least partially disposed oppositely, the first reflecting surface 241 and the second reflecting surface 242 are obliquely disposed and connected, and the light ray 22 is sequentially reflected on the first reflecting surface 241, the third intermediate reflecting surface 2433, the fourth intermediate reflecting surface 2434, the fifth intermediate reflecting surface 2435 and the second reflecting surface 242.

Alternatively, the optical path increasing element 24 further includes a sixth intermediate reflecting plate, a seventh intermediate reflecting plate, an eighth intermediate reflecting plate, and a ninth intermediate reflecting plate, which are connected in sequence, where the sixth intermediate reflecting plate is provided with a sixth intermediate reflecting surface 2436, the seventh intermediate reflecting plate is provided with a seventh intermediate reflecting surface 2437, and the eighth intermediate reflecting plate is provided with an eighth intermediate reflecting surface 2438. The first reflection surface 241 and the sixth intermediate reflection surface 2436 are spaced and at least partially disposed opposite to each other, the second reflection surface 242 and the ninth intermediate reflection surface 2439 are spaced and at least partially disposed opposite to each other, the first reflection surface 241 and the second reflection surface 242 are obliquely disposed and connected to each other, and the light ray 22 is sequentially reflected by the first reflection surface 241, the sixth intermediate reflection surface 2436, the seventh intermediate reflection surface 2437, the eighth intermediate reflection surface 2438, the ninth intermediate reflection surface 2439 and the second reflection surface 242.

The optical path system 2 includes a plurality of optical path increasing elements 24, a plurality of the optical path increasing elements 24 are disposed adjacent to each other, and the light ray 22 emitted from one of the optical path increasing elements 24 can enter the next optical path increasing element 24 to further increase the optical path of the light ray 22.

It should be noted that the optical path folding element may also be disposed at other positions, for example, the optical path increasing element 24 may also be disposed at a side of the beam combining mirror 3 away from the optical path system 2, so as to fold the combined beam 22.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The optical path system of the laser and the laser provided in the embodiments of the present application are described in detail above, and the principle and the embodiments of the present application are explained in detail herein by applying specific examples, and the description of the above embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. An optical path system of a laser, comprising:

a light emitting element capable of emitting light;

the reflector is arranged opposite to the light-emitting surface of the light-emitting element and used for reflecting the light;

optical path increase component, set up in light emitting component with between the speculum, optical path increase component includes first plane of reflection, a plurality of middle plane of reflection and second plane of reflection, first plane of reflection with light emitting component's play plain noodles sets up relatively, light warp get into after first plane of reflection, a plurality of middle plane of reflection and the second plane of reflection in proper order the speculum, the incident light of first plane of reflection with the emergent light of second plane of reflection is located the coplanar.

2. The optical path system of a laser according to claim 1, wherein the optical path increasing element further includes a prism, the prism has an incident surface, an exit surface, the first reflecting surface, the second reflecting surface, and the plurality of intermediate reflecting surfaces, the number of the plurality of intermediate reflecting surfaces is two, and the two intermediate reflecting surfaces are respectively a first intermediate reflecting surface and a second intermediate reflecting surface, the first reflecting surface is spaced from and at least partially disposed opposite to the first intermediate reflecting surface, the second reflecting surface is spaced from and at least partially disposed opposite to the second intermediate reflecting surface, the first reflecting surface, the incident surface, the first intermediate reflecting surface, the second intermediate reflecting surface, the exit surface, and the second reflecting surface are sequentially connected, the first reflecting surface and the second reflecting surface are obliquely disposed and connected, and the light enters the optical path increasing element through the incident surface, and is emitted from the emergent surface after being reflected by the first reflecting surface, the first middle reflecting surface, the second middle reflecting surface and the second reflecting surface in sequence.

3. The optical path system according to claim 2, wherein the light emitting element emits the light traveling in a horizontal direction, the incident surface is disposed vertically, the first intermediate reflecting surface is disposed above the first reflecting surface, and the second intermediate reflecting surface is disposed above the second reflecting surface.

4. The optical path system of claim 3, wherein the first reflecting surface is disposed obliquely to the incident surface, and an included angle between the first reflecting surface and the incident surface is greater than or equal to a preset angle.

5. The optical path system of the laser according to any one of claims 2 to 4, wherein the exit surface is a curved surface.

6. The optical path system of the laser according to any one of claims 2 to 4, wherein an anti-reflection film is provided on the incident surface and/or the exit surface.

7. The optical path system of claim 1, wherein the number of the intermediate reflection surfaces is two, and the intermediate reflection surfaces are respectively a first intermediate reflection surface and a second intermediate reflection surface, the first reflection surface is spaced from and at least partially opposite to the first intermediate reflection surface, the second reflection surface is spaced from and at least partially opposite to the second intermediate reflection surface, the first reflection surface and the second reflection surface are obliquely arranged and connected, the first intermediate reflection surface and the second intermediate reflection surface are obliquely arranged and connected, and the light is sequentially reflected on the first reflection surface, the first intermediate reflection surface, the second intermediate reflection surface, and the second reflection surface;

or the number of the plurality of intermediate reflecting surfaces is three, and the intermediate reflecting surfaces are respectively a third intermediate reflecting surface, a fourth intermediate reflecting surface and a fifth intermediate reflecting surface which are sequentially connected, the first reflecting surface and the third intermediate reflecting surface are arranged at intervals and at least partially opposite to each other, the second reflecting surface and the fifth intermediate reflecting surface are arranged at intervals and at least partially opposite to each other, the first reflecting surface and the second reflecting surface are obliquely arranged and connected, and the light rays are sequentially reflected on the first reflecting surface, the third intermediate reflecting surface, the fourth intermediate reflecting surface, the fifth intermediate reflecting surface and the second reflecting surface;

or, the quantity of a plurality of intermediate reflection faces is four, is sixth intermediate reflection face, seventh intermediate reflection face, eighth intermediate reflection face and the ninth intermediate reflection face that connects gradually respectively, first reflection face with sixth intermediate reflection face interval and at least part set up relatively, the second reflection face with ninth intermediate reflection face interval and at least part set up relatively, first reflection face with the second reflection face slope sets up and connects, light is in proper order first reflection face, sixth intermediate reflection face, seventh intermediate reflection face, eighth intermediate reflection face, ninth intermediate reflection face and reflect on the second reflection face.

8. The optical path system according to claim 1, wherein the optical path system includes a plurality of optical path increasing elements, the plurality of optical path increasing elements being disposed adjacent to each other, and the light emitted from one of the optical path increasing elements can enter a next optical path increasing element.

9. An optical path system of a laser, comprising:

a light emitting element capable of emitting light;

the reflector is arranged opposite to the light-emitting surface of the light-emitting element and used for reflecting the light;

the optical path increasing element is arranged between the light-emitting element and the reflector, and comprises a first reflecting surface, a first middle reflecting surface, a second middle reflecting surface and a second reflecting surface, wherein the first reflecting surface is arranged opposite to the light-emitting surface of the light-emitting element, the first middle reflecting surface is arranged above the first reflecting surface, the second middle reflecting surface is arranged on one side, close to the light-emitting element, of the first middle reflecting surface, the second reflecting surface is arranged below the second middle reflecting surface and is connected with the second middle reflecting surface, the first middle reflecting surface is arranged opposite to the second reflecting surface, the first reflecting surface is arranged opposite to the second middle reflecting surface, and the first reflecting surface and the second reflecting surface are arranged at intervals.

10. A laser, comprising:

a base;

a plurality of the optical systems of any of claims 1-9, each of the plurality of optical systems disposed within and coupled to the base, the plurality of optical systems being disposed adjacent to and spaced apart from each other.

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