Light source assembly

Abstract

The embodiment of the utility model provides a light source assembly, a plurality of mounting parts are arranged in a shell of the light source assembly, each mounting part comprises a first mounting surface and a second mounting surface which have a height difference, and a laser unit is mounted in the shell and is used for emitting laser beams; each lens assembly comprises a first lens and a second lens which are located on a light path of the laser beam, each lens assembly is installed on the corresponding installation portion, the first lens in the same lens assembly is installed on the first installation face, and the second lens is installed on the second installation face. One of the first lens and the second lens is a reflector, the other of the first lens and the second lens is a polarizer, and the polarizer is used for reflecting the received laser beams, transmitting the laser beams reflected by the reflector and combining the transmitted and reflected laser beams; the light condensing element is located on the light emitting paths of the multiple lens assemblies and used for condensing the light beams of the multiple lens assemblies, and mutual interference possibly generated when the first lens and the second lens are fixed can be avoided.

Description

Technical Field

[0001] The present application relates to the field of laser technology, and in particular to a light source assembly. Background Art

[0002] In laser cutting and engraving applications, a high-energy-density laser beam is key to efficient processing. To achieve this, precise adjustment of the laser beam from the laser unit is often necessary. However, in existing laser light source systems, the mounting and fixing schemes for optical components such as reflectors and polarizers directly impact beam quality and overall system performance. Utility Model Content

[0003] The embodiments of the present application provide a light source assembly to improve the above technical problems.

[0004] The embodiments of the present application improve the above technical problems through the following technical solutions.

[0005] An embodiment of the present application provides a light source assembly, which includes a shell, a laser unit, multiple lens assemblies and a focusing element. The shell is provided with multiple mounting parts, each mounting part includes a first mounting surface and a second mounting surface, and the first mounting surface and the second mounting surface have a height difference; the laser unit is installed in the shell, and the laser unit is used to emit a laser beam; each lens assembly includes a first lens and a second lens, and the first lens and the second lens are both located in the optical path of the laser beam. Each lens assembly is installed on a corresponding mounting part, and the first lens in the same lens assembly is installed on the first mounting surface, and the second lens is installed on the second mounting surface. One of the first lens and the second lens is a reflector, and the other is a polarizer. The polarizer is used to reflect the received laser beam, and the polarizer is also used to transmit the laser beam reflected by the reflector, and combine the transmitted laser beam with the reflected laser beam; the focusing element is located in the light output path of the multiple lens assemblies, and is used to focus the beams of the multiple lens assemblies.

[0006] In some embodiments, the first lens is glued to the first mounting surface, and the second lens is glued to the second mounting surface.

[0007] In some embodiments, the side edge of the first lens in the longitudinal direction is glued to the first mounting surface, and the side edge of the second lens in the longitudinal direction is glued to the second mounting surface.

[0008] In some embodiments, each mounting portion includes a first ceramic washer and a second ceramic washer, the first ceramic washer includes a first mounting surface, and the second ceramic washer includes a second mounting surface.

[0009] In some embodiments, a plurality of step surfaces with height differences are provided in the housing, and the first ceramic gasket and the second ceramic gasket in the same mounting portion are respectively fixed to two adjacent step surfaces.

[0010] In some embodiments, the plurality of mounting portions have height differences therebetween, and the plurality of lens assemblies are sequentially disposed on the mounting portions at different heights.

[0011] In some embodiments, the first lens and the second lens in the same lens assembly are sequentially disposed on the adjacent first mounting surface and the second mounting surface.

[0012] In some embodiments, the laser unit includes multiple laser chips, and the light-emitting surfaces of the multiple laser chips are set at the same height; the light source assembly also includes a first displacement prism and a second displacement prism, the first displacement prism is located in the light-emitting path of one part of the laser chip, and the second displacement prism is located in the light-emitting path of the other part of the laser chip, and the first displacement prism and the second displacement prism are respectively used to guide the output light of the laser chip to different lens assemblies.

[0013] In some embodiments, the light source assembly further includes a fast axis collimating lens, which is located in the optical path of the laser beam and is used to guide the laser beam to the lens assembly.

[0014] In some embodiments, the light source assembly further includes a slow-axis collimating lens, which is located in the light output path of the lens assembly and is used to guide the output light of the lens assembly to the focusing element.

[0015] In some embodiments, the light source assembly further includes a plurality of half-wave plates, each of which is located in the optical path of the laser beam and is used to guide the laser beam to a corresponding polarizer.

[0016] In any of the above embodiments of the present application, a housing of the light source assembly is provided with a plurality of mounting portions, wherein a first mounting surface and a second mounting surface of each mounting portion have a height difference, a laser unit is mounted in the housing, the laser unit is configured to emit a laser beam, a first lens and a second lens of the lens assembly are both located in the optical path of the laser beam, each lens assembly is mounted on a corresponding mounting portion, the first lens in the same lens assembly is mounted on the first mounting surface, and the second lens is mounted on the second mounting surface, one of the first lens and the second lens is a reflector, and the other is a polarizer, the polarizer is configured to reflect the received laser beam, the polarizer HIA is configured to transmit the laser beam reflected by the reflector, and combine the transmitted laser beam with the reflected laser beam, and a focusing element is located in the light output path of the plurality of lens assemblies and is configured to focus the beams of the plurality of lens assemblies. In this manner, by using the plurality of lens assemblies and the focusing element, the beams can be more effectively focused after being reflected and polarized, thereby effectively adjusting the laser beams emitted by the plurality of lens assemblies into a beam with high energy density, thereby helping to meet the beam quality requirements of laser cutting or engraving applications, thereby improving the overall performance of the entire light source assembly. In addition, since the first lens and the second lens are respectively mounted on mounting surfaces at different heights, it helps to avoid mutual interference that may occur when the first lens and the second lens are fixed on the corresponding mounting surfaces, helps to ensure that each lens can be firmly fixed in the shell, and improves the stability and reliability of the entire light source assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 The schematic diagram illustrates the structure of the light source assembly provided by some embodiments of the present application.

[0019] Figure 2 Example Figure 1 A partial structural diagram of a light source assembly provided in an embodiment.

[0020] Figure 3 Example Figure 1 A structural schematic diagram of another part of the light source assembly provided in an embodiment.

[0021] Figure 4 Example Figure 1 A structural schematic diagram of another part of the light source assembly provided in an embodiment.

[0022] Figure 5 Example Figure 1 A structural schematic diagram of another part of the light source assembly provided in an embodiment. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0025] See Figures 1 to 3 , an embodiment of the present application provides a light source assembly 100, which can be applied to a laser cutting machine or other products.

[0026] The light source assembly 100 includes a shell 110, a laser unit 120, multiple lens assemblies 130 and a focusing element 140. The laser unit 120, multiple lens assemblies 130 and the focusing element 140 can all be installed in the shell 110. The laser unit 120 is used to emit a laser beam 121. The lens assembly 130 is used to receive the laser beam 121 from the laser unit 120. The focusing element 140 is located in the light output path of the multiple lens assemblies 130 and is used to focus the light beams of the multiple lens assemblies 130.

[0027] In some embodiments, the light source assembly 100 further includes a fast-axis collimating lens 160, which is located in the optical path of the laser beam 121 and is used to guide the laser beam 121 to the lens assembly 130. In this manner, the fast-axis collimating lens 160 can effectively reduce the divergence angle of the laser beam 121 in the fast-axis direction, thereby making the beam more concentrated and uniform in the fast-axis direction. This also helps reduce energy loss during beam propagation, improves beam quality, and ensures the stability and consistency of the laser beam 121 during transmission. Furthermore, by first collimating the laser beam 121 in the fast-axis direction, the fast-axis collimating lens 160 helps precisely control the direction and path of the laser beam 121, allowing it to accurately enter the subsequent lens assembly 130, thereby improving the focusing effect of multiple laser beams 121. This design helps ensure that different beams can be optimally focused, thereby facilitating the formation of a composite beam with high energy density.

[0028] In some embodiments, the number of fast-axis collimating lenses 160 may be one or more. For example, the number of fast-axis collimating lenses 160 may be one, and the fast-axis collimating lens 160 may be a cylindrical lens. In another example, the number of fast-axis collimating lenses 160 may be multiple, and for example, the multiple fast-axis collimating lenses 160 may include a fast-axis plano-convex cylindrical lens 161 and a fast-axis plano-concave cylindrical lens 162. The fast-axis plano-convex cylindrical lens 161 and the fast-axis plano-concave cylindrical lens 162 may be sequentially positioned between the laser unit 120 and the lens assembly 130.

[0029] In some embodiments, the light source assembly 100 further includes a slow-axis collimating lens 170, which is sequentially positioned in the light-emitting path of the lens assembly 130 and is used to guide the output light from the lens assembly 130 to the focusing element 140. In this manner, the slow-axis collimating lens 170 can effectively reduce the divergence angle of the laser beam 121 in the slow-axis direction, thereby making the beam more concentrated and uniform in the slow-axis direction. This also helps reduce energy loss during beam propagation, improves beam quality, and ensures the stability and consistency of the laser beam 121 during transmission. Furthermore, by first collimating the laser beam 121 in the slow-axis direction, the slow-axis collimating lens 170 helps precisely control the direction and path of the laser beam 121, enabling it to accurately enter the subsequent lens assembly 130, thereby improving the focusing effect of multiple laser beams 121. This design helps ensure that different beams can be optimally focused, thereby facilitating the formation of a composite beam with high energy density.

[0030] In some embodiments, the number of slow-axis collimating lenses 170 may be one or more. For example, the number of slow-axis collimating lenses 170 may be one, and the slow-axis collimating lens 170 may be a cylindrical lens. For another example, the number of slow-axis collimating lenses 170 may be multiple, and for example, the multiple slow-axis collimating lenses 170 may include a slow-axis plano-concave cylindrical lens 171 and a slow-axis plano-convex cylindrical lens 172. The slow-axis plano-concave cylindrical lens 171 and the slow-axis plano-convex cylindrical lens 172 may be sequentially positioned between the lens assembly 130 and the focusing element 140.

[0031] In some embodiments, the function of the fast-axis collimating lens 160 and the slow-axis collimating lens 170 is mainly to shape the spot of the laser beam. If the shaping is not performed, the spot of the laser beam is an elliptical spot. After being focused by the focusing element 140, a long strip of light is formed. The fast-axis collimating lens 160 and the slow-axis collimating lens 170 of the embodiment of the present application can shape the spots of multiple laser beams into a substantially rectangular or circular spot, that is, the major axis and the minor axis are substantially the same. Therefore, after focusing, the light can be focused to a circular point, and the power density is improved. Among them, since the laser beam diffuses faster in the fast axis direction and diffuses slower in the slow axis direction, the fast-axis collimating lens 160 is arranged between the laser unit 120 and the lens assembly 130 in the optical path, and the slow-axis collimating lens 170 is arranged between the lens assembly 130 and the focusing element 140.

[0032] See Figure 1 and Figure 4 A plurality of mounting portions 111 are provided in the housing 110 , each mounting portion 111 includes a first mounting surface 1111 and a second mounting surface 1112 , and the first mounting surface 1111 and the second mounting surface 1112 have a height difference.

[0033] Each lens assembly 130 includes a first lens 131 and a second lens 132, both of which are located in the optical path of the laser beam 121. Each lens assembly 130 is mounted on a corresponding mounting portion 111. The first lens 131 in the same lens assembly 130 is mounted on the first mounting surface 1111, and the second lens 132 is mounted on the second mounting surface 1112. One of the first lens 131 and the second lens 132 is a reflector, and the other is a polarizer. The polarizer is used to reflect the received laser beam. The polarizer is also used to transmit the laser beam reflected by the reflector and combine the transmitted laser beam with the reflected laser beam.

[0034] In the same set of lens components 130, the reflector and the polarizer use polarization to combine light, that is, the laser beam reflected by the reflector is transmitted by the polarizer, and the polarizer also reflects the received laser beam, so that the laser beam transmitted by the polarizer and the reflected laser beam are combined into a laser beam.

[0035] In different lens assemblies 130, for example, taking two lens assemblies 130 as an example, the two reflectors of the two lens assemblies 130 respectively reflect the laser beams emitted from the laser unit 120. The two reflectors are arranged in a geometric space, for example Figure 2 The laser beam emitted by the laser unit 120 shown has a position offset in the direction of travel. For example, one of the reflectors can be set to an edge position for the laser beam reflected by the other reflector to pass through, so that the two laser beams transmitted and reflected by one of the reflectors are combined in geometric space.

[0036] In this way, the laser unit 120 emits a laser beam, the fast axis collimating lens 160 collimates the fast axis of the laser beam, and then the multiple laser beams are geometrically focused and polarized focused through multiple reflectors and multiple polarizers, and then the slow axis collimating lens 170 collimates the slow axis of the laser beam, and finally the laser beam is focused through the focusing element 140, which helps to effectively adjust the laser beam 121 emitted by the multiple lens assemblies 130 into a beam with high energy density, helps to meet the beam quality requirements in laser cutting or engraving applications, thereby improving the overall performance of the entire light source assembly 100.

[0037] In addition, since the first lens 131 and the second lens 132 are respectively mounted on mounting surfaces at different heights, it helps to avoid mutual interference that may occur when the first lens 131 and the second lens 132 are fixed on corresponding mounting surfaces, and helps to ensure that each lens (such as the first lens 131 and the second lens 132) can be firmly fixed in the shell 110, thereby improving the stability and reliability of the entire light source assembly 100.

[0038] In some embodiments, the first lens 131 can be glued to the first mounting surface 1111. The second lens 132 can be glued to the second mounting surface 1112. Using glue to secure the lenses helps simplify the assembly process. Compared to complex mechanical fixing structures, gluing can more quickly and conveniently position and secure the lenses, reducing assembly difficulty and improving production efficiency. Furthermore, gluing can provide a uniform and strong bond, helping to reduce displacement caused by mechanical vibration or environmental changes, thereby helping to maintain lens position accuracy.

[0039] In addition, since the first lens 131 and the second lens 132 are respectively mounted on mounting surfaces at different heights, it helps to reduce the mutual interference of the glue between the lenses during the process of gluing the lenses to the mounting surfaces.

[0040] In some embodiments, the first lens 131 may be glued to the first mounting surface 1111 by a glue-dispensing process. The second lens 132 may be glued to the second mounting surface 1112 by a glue-dispensing process.

[0041] See Figures 4 and 5 In some embodiments, the longitudinal side edges 1311 of the first lens 131 can be glued to the first mounting surface 1111. The longitudinal side edges 1321 of the second lens 132 can be glued to the second mounting surface 1112. In this way, the intersection of the longitudinal side edges of the lens with the width side edges can provide a larger bonding area, thereby helping to improve the reliability of the lens fixation, helping to reduce lens loosening caused by external vibration or impact, and ensuring the stability of the lens during long-term use.

[0042] In addition, since the sides of the lens are glued in the longitudinal direction, the assembly process is simplified, and the operator only needs to apply an appropriate amount of glue on the side and then place the lens on the corresponding mounting surface. This method is more convenient and quicker than applying glue on the entire bottom surface, which helps to improve production efficiency and also helps reduce the impact of glue on the central area of ​​the lens, thereby helping to maintain the optical performance of the lens.

[0043] In some embodiments, each mounting portion 111 may include a first ceramic gasket 1113 and a second ceramic gasket 1114. The first ceramic gasket 1113 includes the aforementioned first mounting surface 1111, which can also be understood as the first mounting surface 1111 being the surface of the first ceramic gasket 1113. The second ceramic gasket 1114 includes the aforementioned second mounting surface 1112, which can also be understood as the second mounting surface 1112 being the surface of the second ceramic gasket 1114.

[0044] Ceramics have high hardness and a low coefficient of thermal expansion, helping to reduce deformation caused by temperature changes. The use of first and second ceramic gaskets 1113, 1114 provides a more precise and flat mounting surface for the lens, thereby improving lens fixation accuracy. Furthermore, ceramics have excellent thermal conductivity, effectively conducting and dissipating heat. The first and second ceramic gaskets 1113, 1114 help quickly transfer heat from the lens to the housing 110, thereby improving heat dissipation efficiency and reducing the impact of temperature gradients on system performance.

[0045] In some embodiments, a plurality of step surfaces 112 with height differences are provided in the housing 110, and the first ceramic gasket 1113 and the second ceramic gasket 1114 in the same mounting portion 111 are respectively fixed to two adjacent step surfaces 112. In this way, each ceramic gasket can be precisely fixed at a specific height, which helps to maintain the relative position accuracy between the lenses, thereby helping to improve the performance of the entire light source assembly 100. The step surface 112 provides a stable support base, helps to improve the fixing stability of the ceramic gasket, helps to reduce the displacement caused by mechanical vibration or environmental changes, thereby helping to maintain the position accuracy of the lens. In addition, by using the step surface 112 to fix the ceramic gasket, it helps to simplify the assembly process. For example, the operator only needs to place the ceramic gasket on the corresponding step surface 112 and perform gluing or other fixing methods.

[0046] See Figures 2 to 3In some embodiments, multiple mounting portions 111 have height differences in sequence, and multiple lens assemblies 130 are sequentially arranged on mounting portions 111 at different heights, which helps each mounting portion 111 to accurately position different lens assemblies 130. Mounting portions 111 at different heights help reduce mutual interference caused by the installation of adjacent lens assemblies 130, and also help disperse heat and improve heat dissipation efficiency. Mounting portions 111 at different heights help form better air circulation, thereby helping to reduce temperature gradients and improve the stability and service life of optical components.

[0047] In some embodiments, the first lens 131 and the second lens 132 in the same lens assembly 130 are sequentially arranged on the adjacent first mounting surface 1111 and the second mounting surface 1112, which helps to arrange the first lens 131 and the second lens 132 compactly and facilitates the combination of laser beams. In addition, since the first mounting surface 1111 and the second mounting surface 1112 have a height difference, it also helps to avoid mutual interference that may occur when the first lens 131 and the second lens 132 are fixed on the corresponding mounting surfaces.

[0048] In some embodiments, the laser unit 120 includes multiple laser chips, and the light-emitting surfaces of the multiple laser chips are set at the same height. The light source assembly 100 also includes a first displacement prism 151 and a second displacement prism 152. The first displacement prism 151 is located in the light-emitting optical path of one portion of the laser chips, and the second displacement prism 152 is located in the light-emitting optical path of another portion of the laser chips. The first displacement prism 151 and the second displacement prism 152 are respectively used to guide the output light of the laser chips to different lens assemblies 130. In this way, setting the light-emitting surfaces of multiple laser chips at the same height and guiding the light beams through the displacement prisms helps reduce the instability of the light beams caused by position deviation of the multiple laser chips, and helps improve the stability and reliability of the entire light source assembly 100.

[0049] In some embodiments, the light source assembly 100 further includes a plurality of half-wave plates 180, each of which is located in the optical path of the laser beam 121 and is used to guide the laser beam 121 to a corresponding polarizer. In this way, the half-wave plates 180 can adjust the polarization direction of the laser beam 121 to match the polarizer, thereby helping to reduce unnecessary interference effects, improve the light combining efficiency of the multiple laser beams 121, and ensure that each beam enters the polarizer in an optimal polarization state, thereby making the beam more concentrated and stable, thereby facilitating the formation of a high-energy-density composite beam that meets the requirements of high-precision processing.

[0050] In this application, unless otherwise expressly specified or limited, terms such as "mounted" and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral connections; mechanical connections; direct connections, indirect connections through an intermediary, internal communication between two components, surface contact only, or surface contact through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0051] In addition, the terms "first", "second", etc. are only used to distinguish descriptions and should not be understood as specific or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this application and the features of different embodiments or examples, unless they are contradictory.

[0052] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate from the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A light source assembly, characterized in that: include: A housing, wherein a plurality of mounting portions are provided in the housing, each of the mounting portions includes a first mounting surface and a second mounting surface, and the first mounting surface and the second mounting surface have a height difference; a laser unit, the laser unit being installed in the housing and configured to emit a laser beam; a plurality of lens assemblies, each of the lens assemblies comprising a first lens and a second lens, the first lens and the second lens both being located in the optical path of the laser beam, each of the lens assemblies being mounted on a corresponding one of the mounting portions, the first lens in the same lens assembly being mounted on the first mounting surface, and the second lens being mounted on the second mounting surface, one of the first lens and the second lens being a reflector, and the other being a polarizer, the polarizer being configured to reflect the received laser beam, the polarizer being further configured to transmit the laser beam reflected by the reflector, and combining the transmitted laser beam with the reflected laser beam; and A focusing element is located in the light output path of the multiple lens assemblies and is used to focus the light beams of the multiple lens assemblies.

2. The light source assembly according to claim 1, wherein: The first lens is glued to the first mounting surface, and the second lens is glued to the second mounting surface.

3. The light source assembly according to claim 2, wherein: The side edge of the first lens in the longitudinal direction is glued to the first mounting surface, and the side edge of the second lens in the longitudinal direction is glued to the second mounting surface.

4. The light source assembly according to claim 1, wherein: Each of the mounting portions includes a first ceramic washer and a second ceramic washer, the first ceramic washer includes the first mounting surface, and the second ceramic washer includes the second mounting surface.

5. The light source assembly according to claim 4, wherein: A plurality of step surfaces with height differences are provided in the housing, and the first ceramic gasket and the second ceramic gasket in the same mounting portion are respectively fixed to two adjacent step surfaces.

6. The light source assembly according to claim 1, wherein: There are height differences between the plurality of mounting portions, and the plurality of lens assemblies are sequentially arranged on the mounting portions at different heights.

7. The light source assembly according to claim 6, wherein: The first lens and the second lens in the same lens assembly are sequentially arranged on the adjacent first mounting surface and the second mounting surface.

8. The light source assembly according to claim 6, wherein: The laser unit includes a plurality of laser chips, and the light-emitting surfaces of the plurality of laser chips are arranged at the same height; The light source assembly also includes a first displacement prism and a second displacement prism. The first displacement prism is located in one part of the light output path of the laser chip, and the second displacement prism is located in another part of the light output path of the laser chip. The first displacement prism and the second displacement prism are respectively used to guide the output light of the laser chip to different lens assemblies.

9. The light source assembly according to claim 1, wherein: The light source assembly further includes a fast axis collimating lens, which is located in the optical path of the laser beam and is used to guide the laser beam to the lens assembly.

10. The light source assembly according to claim 1, wherein: The light source assembly further includes a slow-axis collimating lens, which is located in the light-emitting path of the lens assembly and is used to guide the combined light beam of the lens assembly to the focusing element.

11. The light source assembly according to claim 1, wherein: The light source assembly further includes a plurality of half-wave plates, each of which is located in the optical path of the laser beam and is used to guide the laser beam to a corresponding one of the polarizers.

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