Laser beam splitter

Abstract

The utility model provides a laser beam splitter. The laser beam splitter comprises a shielding cavity and a beam splitter body arranged in the shielding cavity. An incident light hole and an emergent light hole are formed in the side surface of the shielding cavity; a laser beam passes through the incident light hole to enter the shielding cavity, and is split by the beam splitter to obtain a split beam; the split light beam passes through the emergent light hole and is emitted out of the shielding cavity; according to the technical scheme, the influence of temperature change on the laser beam splitter can be reduced, and the working stability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser technology, in particular to a laser beam splitter. BACKGROUND

[0002] In some laser instruments, a high-power laser beam is split into multiple laser beams by a laser beam splitter. The split laser beams need to be coupled respectively, and the coupling position precision reaches the sub-micron (μm) level. Therefore, the splitter requires very high stability, and the influence of environmental factors such as temperature and vibration needs to be eliminated. The conventional method is to use air conditioning equipment to control temperature changes, so that the splitter works in a relatively stable constant temperature environment.

[0003] However, when using air conditioning equipment to achieve a constant temperature environment, the temperature periodically changes by about 3℃, and the temperature variation range will cause a large displacement of the laser beam position, thereby affecting the working stability of the splitter. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to solve one of the above technical defects, and provides a laser beam splitter that can improve the working stability of the laser beam splitter.

[0005] A laser beam splitter, comprising: a shielding cavity and a splitter built-in the shielding cavity;

[0006] The shielding cavity is provided with an incident light hole and an exit light hole on the side surface;

[0007] The laser beam enters the inside of the shielding cavity through the incident light hole, and is split by the splitter to obtain split light beams;

[0008] The split light beams exit to the outside of the shielding cavity through the exit light hole.

[0009] In an embodiment, the exit light hole comprises a reflection light hole and a transmission light hole;

[0010] The split light beams comprise reflection light beams and transmission light beams;

[0011] The reflection light beams exit to the outside of the shielding cavity through the reflection light hole, and the transmission light beams exit to the outside of the shielding cavity through the transmission light hole.

[0012] In an embodiment, the shielding cavity is designed as a cubic cavity structure;

[0013] The incident light hole, the reflection light hole and the transmission light hole are respectively located on three side surfaces of the shielding cavity; wherein the incident light hole and the transmission light hole are respectively arranged on the opposite side surfaces of the shielding cavity, and the reflection light hole is arranged on the side surface adjacent to the incident light hole of the shielding cavity.

[0014] In one embodiment, the incident light aperture is provided with an incident light diaphragm for adjusting the alignment of the incident light beam and the size of the aperture;

[0015] The reflected light aperture is provided with a reflected light diaphragm for adjusting the alignment of the reflected light beam and the size of the aperture;

[0016] The transmitted light aperture is provided with a transmitted light diaphragm for adjusting the alignment of the transmitted light beam and the size of the aperture.

[0017] In one embodiment, the shielding cavity comprises, from inside to outside, an inner heat-conducting layer and a heat-insulating layer;

[0018] The inner heat-conducting layer is used to homogenize the heat inside the cavity;

[0019] The heat-insulating layer is used to insulate the inside of the cavity.

[0020] In one embodiment, the heat-insulating layer further comprises an outer heat-conducting layer for homogenizing the heat outside the shielding cavity.

[0021] In one embodiment, the inner heat-conducting layer comprises a high-heat-conducting copper plate, the heat-insulating layer comprises a foam plate or a heat-insulating ceramic layer, and the outer heat-conducting layer comprises a high-heat-conducting copper plate.

[0022] In one embodiment, the beam splitter comprises a beam splitting plate and an angle adjuster, wherein the beam splitting plate is arranged on the angle adjuster;

[0023] The beam splitting plate is arranged inside the shielding cavity;

[0024] The angle adjuster is used to adjust the angle of the beam splitting plate to change the direction of the light path.

[0025] In one embodiment, the angle adjuster is fixedly connected to the bottom surface of the shielding cavity by a bolt.

[0026] In one embodiment, a shock absorber is further arranged between the angle adjuster and the bottom surface of the shielding cavity.

[0027] The technical solutions of the above embodiments have the following beneficial effects:

[0028] (1) The beam splitter is arranged inside the shielding cavity, which reduces the influence of temperature changes on the laser beam splitter and improves the working stability.

[0029] (2) The shielding cavity with double heat-conducting layers and a heat-insulating layer can achieve better heat-insulating effect and make the temperature distribution inside and outside the cavity uniform.

[0030] (3) The beam splitter integrated with the integrated beam splitting piece, angle adjuster and damper in the shielding cavity, reduces the influence of temperature stress and environmental vibration, and has high stability.

[0031] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the accompanying drawings or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The foregoing and / or additional aspects and advantages of the present application are achieved by providing what is described below, which will become apparent to one skilled in the art from the following description.

[0033] Figure 1 FIG. 1 is a schematic diagram of a laser beam splitter structure of an embodiment;

[0034] Figure 2 FIG. 3 is a schematic diagram of an external structure of a shielding cavity of an embodiment;

[0035] Figure 3 FIG. 4 is a perspective view of a laser beam splitter of an embodiment;

[0036] Figure 4 FIG. 5 is a layered schematic diagram of a shielding cavity of an example;

[0037] Figure 5 FIG. 6 is an exploded view of a beam splitter of an embodiment;

[0038] Figure 6 FIG. 7 is an exploded view of a laser beam splitter of an embodiment. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described in detail below with reference to the attached drawings, which are examples of embodiments of the present application. The same or similar components are denoted by the same or similar reference numerals throughout the drawings, and a repeated description thereof will be omitted. The embodiments described below are examples for explaining the present application, and should not be construed as limiting the present application.

[0040] It should be understood by those skilled in the art that the singular forms "a," "an," and "the" used in the description herein are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, actions, but do not preclude the presence or addition of one or more other features, integers, steps, operations, actions.

[0041] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0042] Reference Figure 1 As shown, Figure 1 is a schematic diagram of a laser beam splitter structure of an embodiment, Figure 1 is a top view, mainly comprising: a shielding cavity 01 and a beam splitter 02; wherein the beam splitter 02 is built-in in the shielding cavity 01, and an incident light hole 11 and an exit light hole 12 are arranged on a side surface 101 of the shielding cavity 01, a laser beam can pass through the incident light hole 11 to enter the inside of the shielding cavity 01, and then split by the beam splitter 02 to obtain a plurality of split beams, and the split beams are then emitted to the outside of the shielding cavity 01 through the exit light hole 12, and the split beams are respectively coupled to corresponding devices for application.

[0043] In an embodiment, as shown in Figure 1 , the beam splitter 02 can split the incident laser beam into two split beams, which are a reflected beam and a transmitted beam, respectively, and correspondingly, the exit light hole 12 arranged on the shielding cavity 01 includes a reflection light hole 12a and a transmission light hole 12b; accordingly, the reflected beam is emitted to the outside of the shielding cavity 01 through the reflection light hole 12a, and the transmitted beam is emitted to the outside of the shielding cavity 01 through the transmission light hole 12b.

[0044] In an embodiment, the shielding cavity 01 is designed as a cavity structure; its external structure can be designed as a specific shape, such as a spherical shape, a polyhedral shape, etc.; in this embodiment, a cubic cavity structure is taken as an example; as shown in Figure 1 and Figure 2 , as shown, Figure 2 is a schematic diagram of the external structure of the shielding cavity of an embodiment, in this embodiment, the incident light hole 11, the reflection light hole 12a and the transmission light hole 12b are respectively located on three side surfaces 101 of the shielding cavity 01; wherein the incident light hole 11 and the transmission light hole 12b are respectively arranged on the opposite side surfaces 101 of the shielding cavity 01, and the reflection light hole 12a is arranged on the side surface 101 adjacent to the incident light hole 11 of the shielding cavity 01.

[0045] In an embodiment, as shown in Figure 3 , as shown, Figure 3 is a perspective view of a laser beam splitter of an embodiment, Figure 3For the perspective view, the diaphragm is arranged at the light hole position of the shielding cavity 01, so that the diaphragm can be adjusted according to the size of the laser beam, the light path of the laser beam is aligned when the light path is built, and after the light path is aligned, the diaphragm is increased to the size that the laser beam just passes through, that is, the opening of the shielding cavity 01 is not too large, the closed state inside is ensured, the alignment state of the laser beam can also be recorded, and the light path can be restored to the initial state.

[0046] Specifically, the incident light diaphragm 31 is installed on the incident light hole 11 of the shielding cavity 01, which is used to adjust the incident light beam alignment and adjust the size of the incident light hole 11; correspondingly, the reflected light diaphragm 32 is installed on the reflected light hole 12a, which is used to adjust the reflected light beam alignment and adjust the size of the reflected light hole 12a; the transmitted light diaphragm 33 is installed on the transmitted light hole 12b, which is used to adjust the transmitted light beam alignment and adjust the size of the transmitted light hole 12b.

[0047] In one embodiment, as shown in Figure 4 , Figure 4 is a layered schematic diagram of a shielding cavity, the shielding cavity 01 includes an inner heat conduction layer 011 and a heat insulation layer 012 from inside to outside; for example, the heat insulation layer 012 can further include an outer heat conduction layer 013; wherein the inner heat conduction layer 011 is used to homogenize the heat inside the cavity, the heat insulation layer 012 is used to insulate the inside of the cavity, and the outer heat conduction layer 013 is used to homogenize the heat outside the shielding cavity 01.

[0048] Preferably, the inner heat conduction layer 011 can include a high-thermal-conductivity copper plate, the heat insulation layer 012 can include a specially-made foam plate or a heat-insulating ceramic layer, and the outer heat conduction layer 013 can include a high-thermal-conductivity copper plate. The heat insulation layer 012 of the bottom surface 102 of the shielding cavity 01 can adopt a heat-insulating ceramic layer, which can have better support and heat insulation effects, the heat insulation layer 012 of the side surface 101 and the top surface 103 of the shielding cavity 01 adopts a foam plate, which can form an effective heat insulation effect. When used in a room with relatively constant temperature, the temperature change in the shielding cavity 01 is slowed down after adding the heat insulation layer 012, which can greatly reduce the amplitude of the periodic temperature change. At the same time, the copper plate has the characteristics of high specific heat capacity and high thermal conductivity, which can effectively homogenize the temperature inside the cavity, so that the temperature inside and outside the cavity is uniformly distributed, a stable working environment is formed, and the influence of temperature change on the beam splitter 02 is reduced.

[0049] In one embodiment, as shown in Figures 1 to 5 , Figure 5 is an exploded view of the beam splitter, the beam splitter 02 can include a beam splitting sheet 21 and an angle adjuster 22; wherein the beam splitting sheet 21 is arranged on the angle adjuster 22, and the beam splitting sheet 21 is arranged inside the shielding cavity 01; wherein the angle adjuster 22 is used to adjust the angle of the beam splitting sheet 21 to change the direction of the light path.

[0050] In one embodiment, as shown in Figures 1 to 6 , Figure 6 is an exploded view of the laser beam splitter of one embodiment, and the angle adjuster 22 is fixedly connected to the bottom surface 102 of the shielding cavity 01 by bolts and screws, for example; a shock absorber 23 can also be provided between the angle adjuster 22 and the bottom surface 102 of the shielding cavity 01, for example, to reduce the impact of vibration.

[0051] Specifically, as shown in Figure 6 , the angle adjuster 22 is mounted on the bottom surface 102 of the shielding cavity 01 through the shock absorber 23, and the beam splitting plate 21 is mounted on the angle adjuster 22; in use, the laser beam enters the shielding cavity 01 through the incident light hole 11 and irradiates on the beam splitting plate 21, wherein the transmitted beam passes out of the shielding cavity 01 along the original light path through the transmitted light hole 12b, and the reflected beam passes out of the shielding cavity 01 from the reflected light hole 12a.

[0052] In summary, the shielding cavity 01 with heat insulation function is designed, which can adopt a cubic cavity, three light holes are formed on each of the three side surfaces 101, and diaphragms can be mounted at the positions of the light holes, which are incident diaphragm, transmitted light diaphragm 33 and reflected light diaphragm 32, respectively; the size of the diaphragm can be adjusted to facilitate the alignment of the light path of the laser beam; in addition, the six surfaces of the shielding cavity 01 are composed of three layers of structures, i.e. inner heat conduction layer 011, heat insulation layer 012 and outer heat conduction layer 013, which can adopt copper plate, foam plate or heat insulation ceramic layer, copper plate, etc. from inside to outside, which can homogenize the temperature inside and outside the shielding cavity 01, and when used in a room with constant temperature, the temperature change in the shielding cavity 01 is slowed down, and the high specific heat capacity and high thermal conductivity of the copper plate can greatly reduce the amplitude of the periodic temperature change in the cavity; the beam splitting plate 21, the angle adjuster 22 and the shock absorber 23 of the beam splitter 02 adopt an integrated design scheme, and the beam splitting plate 21, the angle adjuster 22 and the shock absorber 23 are integrated and installed in the shielding cavity 01 with stable temperature, thereby reducing the influence of thermal stress of the beam splitting plate 21 caused by periodic change of environmental temperature; in addition, the angle adjuster 22 is used to adjust the output of the laser beam from the three diaphragms when the initial light path is aligned, thereby obtaining a laser beam splitter with simple design, convenient installation and stable performance.

[0053] The above only describes some embodiments of the present application, and it should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A laser beam splitter, characterized in that, include: The shielding cavity (01) and the beam splitter (02) built into the shielding cavity (01); The shielding cavity (01) has an incident light hole (11) and an exit light hole (12) on its side (101). The laser beam passes through the incident light aperture (11) and enters the shielding cavity (01), and is split by the beam splitter (02) to obtain a split beam; The split beam passes through the exit aperture (12) and exits to the outside of the shielding cavity (01).

2. The laser beam splitter according to claim 1, characterized in that, The output light aperture (12) includes: a reflection light aperture (12a) and a transmission light aperture (12b); The beam splitting beam includes: a reflected beam and a transmitted beam; The reflected light beam passes through the reflecting light hole (12a) and exits to the outside of the shielding cavity (01), while the transmitted light beam passes through the transmitted light hole (12b) and exits to the outside of the shielding cavity (01).

3. The laser beam splitter according to claim 2, characterized in that, The shielding cavity (01) is designed as a cubic cavity structure; The incident light aperture (11), the reflected light aperture (12a), and the transmitted light aperture (12b) are respectively located on the three sides (101) of the shielding cavity (01); wherein the incident light aperture (11) and the transmitted light aperture (12b) are respectively located on the opposite sides (101) of the shielding cavity (01), and the reflected light aperture (12a) is located on the side (101) of the shielding cavity (01) adjacent to the incident light aperture (11).

4. The laser beam splitter according to claim 3, characterized in that, An incident light aperture (31) is installed on the incident light aperture (11) for adjusting the alignment of the incident light beam and the size of the light aperture; A reflective aperture (32) is installed on the reflective aperture (12a) for adjusting the alignment of the reflected beam and the size of the aperture; A transmission aperture (33) is installed on the transmission aperture (12b) to adjust the alignment of the transmission beam and the size of the aperture.

5. The laser beam splitter according to claim 4, characterized in that, The shielding cavity (01) includes, from the inside to the outside, an inner heat-conducting layer (011) and a heat-insulating layer (012). The inner heat-conducting layer (011) is used to homogenize the heat inside the cavity; The heat insulation layer (012) is used to insulate the interior of the cavity.

6. The laser beam splitter according to claim 5, characterized in that, The heat insulation layer (012) also includes an external heat-conducting layer (013) for homogenizing the heat outside the shielding cavity (01).

7. The laser beam splitter according to claim 6, characterized in that, The inner thermally conductive layer (011) includes a copper plate with high thermal conductivity, the thermal insulation layer (012) includes a foam board or a thermally insulating ceramic layer, and the outer thermally conductive layer (013) includes a copper plate with high thermal conductivity.

8. The laser beam splitter according to any one of claims 1-7, characterized in that, The beam splitter (02) includes: a beam splitter (21) and an angle adjuster (22); wherein the beam splitter (21) is disposed on the angle adjuster (22); The beam splitter (21) is used to be built into the shielding cavity (01); The angle adjuster (22) is used to adjust the angle of the beam splitter (21) to change the direction of the optical path.

9. The laser beam splitter according to claim 8, characterized in that, The angle adjuster (22) is fixedly connected to the bottom surface (102) of the shielding cavity (01) by bolts.

10. The laser beam splitter according to claim 9, characterized in that, A shock absorber (23) is also provided between the angle adjuster (22) and the bottom surface (102) of the shielding cavity (01).

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