Lens assembly and laser

Abstract

A lens assembly and a laser, which relate to the technical field of laser lens positioning, include a lens and a lens seat, wherein the lens has a first side wall with an arc structure and a second side wall with a plane structure, the lens seat has a bearing part with a plane structure, the second side wall is fixedly connected to the bearing part, so that the lens is fixedly connected to the lens seat, and the first side wall is exposed outside the bearing part. The lens assembly and the laser can improve the reliability of the laser.

Description

Technical Field

[0001] The present invention relates to the technical field of laser lens positioning, and in particular to a lens assembly and a laser. Background Art

[0002] In the production and debugging process of solid-state lasers, it is necessary to adjust the angle of the lens through a precise mechanical structure in order to obtain the maximum power output and good beam quality. It is common in the laser industry to glue all the lenses to the corresponding mechanical lens holders in advance, and then embed the whole into the laser system for integration, so as to realize the operation of the laser.

[0003] At present, circular lenses or square lenses are more commonly used in the laser industry. Among them, circular lenses have a wider range of uses. However, the use of circular lenses has the following disadvantages: since the expansion coefficients of the lens and glue are difficult to be consistent, and the glue bonding strength is required to be high in this application, there is a risk of lens tearing at the boundary between the lens and the glue. Once the lens is torn, it will cause the laser light path to shift, and there is a risk of the crack expanding again, and even cause the entire laser to fail completely. Summary of the invention

[0004] The object of the present invention is to provide a lens assembly and a laser, which can improve the reliability of the laser.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In one aspect of an embodiment of the present invention, a lens assembly is provided, comprising a lens and a lens holder, wherein the lens has a first side wall with a curved surface structure and a second side wall with a planar structure, the lens holder has a bearing portion with a planar structure, the second side wall is fixedly connected to the bearing portion so that the lens is fixedly connected to the lens holder, and the first side wall is exposed outside the bearing portion. The lens assembly can improve the reliability of the laser.

[0007] Optionally, in a preferred embodiment of the present invention, along a direction perpendicular to the second side wall, the lens and the lens seat are both symmetrical structures, and the lens and the lens seat are arranged opposite to each other.

[0008] Optionally, in a preferred embodiment of the present invention, along the length direction of the second side wall, the length of the second side wall is greater than the length of the bearing portion, so that two sides of the second side wall are exposed outside the bearing portion.

[0009] Optionally, in a preferred embodiment of the present invention, along the width direction of the second side wall, the width of the second side wall is less than or equal to the width of the bearing portion, so that at least one side of the bearing portion is exposed outside the second side wall.

[0010] Optionally, in a preferred embodiment of the present invention, the mirror seat includes a base and a supporting platform arranged on the base, and air avoidance grooves are respectively arranged on both sides of the supporting platform, the supporting part is located between the two air avoidance grooves, and both sides of the second side wall are respectively located above the air avoidance grooves, and there is a gap between the corresponding air avoidance grooves.

[0011] Optionally, in a preferred embodiment of the present invention, limiting protrusions are respectively provided on the outer sides of the two air avoiding grooves, the second side wall is located between the two limiting protrusions, and the two sides of the first side wall are respectively abutted against the corresponding limiting protrusions.

[0012] Optionally, in a preferred embodiment of the present invention, a buffer groove is provided on a side of the base away from the supporting platform, and the buffer groove is located below the supporting platform.

[0013] Optionally, in a preferred embodiment of the present invention, a plurality of fixing holes are provided on the base, and the plurality of fixing holes are respectively located on both sides of the supporting platform.

[0014] Optionally, in a preferred embodiment of the present invention, the second side wall is bonded and fixed to the bearing portion.

[0015] Another aspect of the present invention provides a laser, comprising the above-mentioned lens assembly. The lens assembly can improve the reliability of the laser.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The lens assembly includes a lens and a lens holder, the lens has a first side wall with a curved surface structure and a second side wall with a planar structure, the lens holder has a bearing portion with a planar structure, the second side wall is fixedly connected to the bearing portion, that is, the plane structure is fixedly connected to the plane structure by fitting together, so that the lens is fixedly connected to the lens holder, and the first side wall is exposed outside the bearing portion to effectively prevent glue from contacting the first side wall with a curved surface structure of the lens, thereby preventing the lens from being torn at the boundary between the lens and the glue, and preventing the lens from being torn due to internal stress, thereby effectively supporting the laser to obtain a larger temperature use and storage range, and improving the reliability of the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 One of the structural schematic diagrams of the lens assembly provided by an embodiment of the present invention;

[0020] Figure 2 A second structural schematic diagram of a lens assembly provided by an embodiment of the present invention;

[0021] Figure 3 The third structural schematic diagram of the lens assembly provided by the embodiment of the present invention;

[0022] Figure 4 The fourth structural schematic diagram of the lens assembly provided in the embodiment of the present invention.

[0023] Icon: 100 - lens assembly; 10 - lens; 11 - first side wall; 12 - second side wall; 20 - lens seat; 21 - base; 211 - fixing hole; 22 - supporting platform; 221 - supporting part; 222 - air avoidance groove; 223 - limiting protrusion; 224 - buffer groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the prior art, the side wall of the circular lens and the receiving groove of the lens holder are respectively arc-shaped structures, and the arc-shaped structure of the side wall of the circular lens and the arc-shaped structure of the receiving groove of the lens holder are adapted to each other, so that the circular lens and the lens holder can be bonded together by glue.

[0031] However, the use of circular lenses has the following disadvantages: since it is difficult to make the expansion coefficients of the lens and glue consistent, and the glue in this application requires a high bonding strength, there is a risk of the lens tearing at the boundary between the lens and the glue. Once the lens is torn, it will cause the laser light path to shift, and there is a risk of the crack expanding further, and even cause the entire laser to fail completely.

[0032] To this end, the present application provides a lens assembly 100, which can prevent the lens 10 from being torn at the boundary between the lens 10 and the glue, thereby preventing the lens 10 from being torn due to internal stress, thereby improving the reliability of the laser.

[0033] Please refer to Figures 1 to 4The present embodiment provides a lens assembly 100, comprising a lens 10 and a lens holder 20, wherein the lens 10 has a first side wall 11 with a curved surface structure and a second side wall 12 with a planar structure, and the lens holder 20 has a bearing portion 221 with a planar structure, and the second side wall 12 is fixedly connected to the bearing portion 221, so that the lens 10 is fixedly connected to the lens holder 20, and the first side wall 11 is exposed outside the bearing portion 221. The lens assembly 100 can improve the reliability of the laser. In the present embodiment, the second side wall 12 is fixedly connected to the bearing portion 221 by glue.

[0034] It should be noted that, first, Figure 1 and Figure 2 As shown, the lens 10 has a first side wall 11 with a curved structure and a second side wall 12 with a planar structure. In addition, the lens 10 also has a front end face and a rear end face for passing light. Regarding the structure of the front end face and the rear end face, those skilled in the art should be able to make reasonable selections and designs according to actual conditions. No specific restrictions are made here. For example, the structure of the front end face and the rear end face can be a plane, a spherical surface or a curved surface.

[0035] Then, how to make the lens 10 with the first side wall 11 of the curved surface structure and the second side wall 12 of the flat structure? For example, the circular lens in the prior art can be cut to separate the original side wall of the circular lens into the first side wall 11 of the curved surface structure and the second side wall 12 of the flat structure.

[0036] It should be noted that in order to ensure the center position of the lens 10 when in use, those skilled in the art should be able to select and design according to the cut-off height of the lens 10 and the actual height of the lens holder 20 (or the bearing portion 221).

[0037] Second, if Figures 1 to 3 As shown, the second side wall 12 is fixedly connected to the bearing portion 221, wherein the second side wall 12 is a planar structure, and the bearing portion 221 is also a planar structure. In other words, the lens 10 is fixedly connected to the lens holder 20 by fitting the planar structure to the planar structure, and the first side wall 11 is exposed outside the bearing portion 221 to effectively prevent the glue from contacting the first side wall 11 of the lens 10 which is a curved structure, thereby preventing the lens 10 from being torn at the boundary between the lens 10 and the glue, and preventing the lens 10 from being torn due to internal stress, thereby effectively supporting the laser to obtain a larger temperature use and storage range, and improving the reliability of the laser.

[0038] As described above, the lens assembly 100 includes a lens 10 and a lens holder 20, the lens 10 has a first side wall 11 with a curved surface structure and a second side wall 12 with a planar structure, the lens holder 20 has a bearing portion 221 with a planar structure, the second side wall 12 is fixedly connected to the bearing portion 221, that is, the plane structure is fixedly connected to the plane structure so that the lens 10 is fixedly connected to the lens holder 20, and the first side wall 11 is exposed outside the bearing portion 221 to effectively prevent the glue from contacting the first side wall 11 with a curved surface structure of the lens 10, thereby preventing the lens 10 from being torn at the boundary between the lens 10 and the glue, and preventing the lens 10 from being torn due to internal stress, thereby effectively supporting the laser to obtain a larger temperature use and storage range, and improving the reliability of the laser.

[0039] When the lens 10 and the lens holder 20 are fixedly connected, the relative positional relationship between the two is as follows: Figure 1 , Figure 2 and Figure 4 In this embodiment, along the direction perpendicular to the second side wall 12, the lens 10 and the lens holder 20 are both symmetrical structures, and the lens 10 and the lens holder 20 are arranged opposite to each other.

[0040] In order to prevent the glue from contacting the first side wall 11 of the lens 10 with a curved surface structure as much as possible, Figure 1 and Figure 2 As shown, in this embodiment, along the length direction of the second side wall 12 , the length of the second side wall 12 is greater than the length of the carrying portion 221 , so that two sides of the second side wall 12 are exposed outside the carrying portion 221 .

[0041] Since the length of the second side wall 12 along the length direction is greater than the length of the bearing portion 221, in order to improve the reliability of the fixed connection between the lens 10 and the lens holder 20, optionally, along the width direction of the second side wall 12, the width of the second side wall 12 is less than or equal to the width of the bearing portion 221, so that at least one side of the bearing portion 221 is exposed outside the second side wall 12. For example, in this embodiment, the width of the second side wall 12 is less than the width of the bearing portion 221.

[0042] like Figures 1 to 4 As shown, specifically, in this embodiment, the mirror holder 20 includes a base 21 and a supporting platform 22 arranged on the base 21, and air avoidance grooves 222 are respectively arranged on both sides of the supporting platform 22, and the supporting portion 221 is located between the two air avoidance grooves 222, and both sides of the second side wall 12 are respectively located above the air avoidance grooves 222, and there is a gap between the corresponding air avoidance grooves 222.

[0043] In this way, even if glue overflows when applying glue to the bearing portion 221, or the second side wall 12 and the bearing portion 221 are bonded and fixed, there is no need to worry that the glue may contact the first side wall 11 of the lens 10 with a curved surface structure, because the air-avoiding grooves 222 on both sides of the bearing platform 22 can accommodate the glue overflowing from the two sides of the bearing portion 221 or between the second side wall 12 and the bearing portion 221, thereby further preventing the glue from contacting the first side wall 11 of the lens 10 with a curved surface structure.

[0044] like Figure 1 , Figure 2 and Figure 4 In this embodiment, limiting protrusions 223 are respectively provided on the outer sides of the two avoiding grooves 222, the second side wall 12 is located between the two limiting protrusions 223, and the two sides of the first side wall 11 are respectively abutted against the corresponding limiting protrusions 223, so that the lens 10 is limitedly installed through the limiting protrusions 223, so that the center position of the lens 10 is at the preset position as much as possible, thereby improving the accuracy of the lens 10 when it is installed on the lens holder 20.

[0045] Due to the advancement of bonding technology, when the lens 10 is bonded to the lens holder 20, the two can be equivalent to a whole. In addition, since the lens 10 is generally made of glass, the toughness of glass is relatively poor, so the lens 10 has a weaker ability to withstand deformation, while the lens holder 20 has a stronger ability to withstand deformation.

[0046] In the case that the bottom surface of the lens holder 20 or the laser is uneven, the lens holder 20 will be deformed when installed on the bottom surface of the laser. Since the lens 10 cannot produce corresponding deformation along with the lens holder 20, the lens 10 is subjected to internal stress. Therefore, there is a risk of the lens 10 tearing at the boundary between the lens 10 and the glue. Once the lens 10 is torn, it will cause the deviation of the laser optical path, and there is a risk of the crack expanding further, and even cause the complete failure of the entire laser.

[0047] For this reason, Figure 1 and Figure 2 As shown, in the present embodiment, a buffer groove 224 is provided on the side of the base 21 away from the supporting platform 22, and the buffer groove 224 is located below the supporting platform 22 to prevent the protrusion of the bottom surface of the mirror holder 20 or the laser from exerting a lifting force on the mounting portion of the mirror holder 20 (i.e., the side of the base 21 away from the supporting platform 22), thereby preventing the mirror holder 20 from tearing the lens 10 due to the uneven bottom surface of the mirror holder 20 or the laser, and further preventing the lens 10 from being torn due to internal stress.

[0048] Among them, regarding the method of fixing the mirror holder 20 and the laser, those skilled in the art should be able to make reasonable selections and designs according to actual conditions. No specific restrictions are made here. For example, the mirror holder 20 and the laser can be threaded or adhesively fixed.

[0049] Specifically, in this embodiment, a plurality of fixing holes 211 are provided on the base 21, for example, two, four, six, etc. The plurality of fixing holes 211 are respectively located on both sides of the support platform 22. By passing screws (or other fixing parts) through the fixing holes 211, the mirror holder 20 can be locked and fixed to the laser.

[0050] In this embodiment, in order to facilitate the application of the lens holder 20 and avoid damage to the lens 10 or other components of the laser, chamfers are provided on the four edges.

[0051] The present application also provides a laser. The laser provided in this embodiment includes the above-mentioned lens assembly 100. Since the structure and beneficial effects of the lens assembly 100 have been described in detail in the above-mentioned embodiments, they will not be repeated here.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lens assembly, characterized in that: It comprises a lens and a lens holder, wherein the lens has a first side wall with a curved surface structure and a second side wall with a planar structure, the lens holder has a bearing portion with a planar structure, the second side wall is fixedly connected to the bearing portion so that the lens is fixedly connected to the lens holder, and the first side wall is exposed outside the bearing portion; The lens also has a front end face and a rear end face for passing light, and the structures of the front end face and the rear end face are plane, spherical or curved; along the length direction of the second side wall, the length of the second side wall is greater than the length of the bearing part, so that both sides of the second side wall are exposed outside the bearing part; the second side wall is bonded and fixed to the bearing part.

2. The lens assembly according to claim 1, characterized in that: Along a direction perpendicular to the second side wall, the lens and the lens seat are both symmetrical structures, and the lens and the lens seat are arranged opposite to each other.

3. The lens assembly according to claim 1, characterized in that: Along the width direction of the second side wall, the width of the second side wall is less than or equal to the width of the carrying portion, so that at least one side of the carrying portion is exposed outside the second side wall.

4. The lens assembly according to claim 1, wherein: The mirror seat includes a base and a supporting platform arranged on the base, and air avoidance grooves are respectively arranged on both sides of the supporting platform. The supporting part is located between the two air avoidance grooves, and both sides of the second side wall are respectively located above the air avoidance grooves and have gaps between the corresponding air avoidance grooves.

5. The lens assembly according to claim 4, characterized in that: Limiting protrusions are respectively arranged on the outer sides of the two air-avoiding grooves, the second side wall is located between the two limiting protrusions, and the two sides of the first side wall are respectively abutted against the corresponding limiting protrusions.

6. The lens assembly according to claim 4, characterized in that: A buffer groove is arranged on a side of the base away from the bearing platform, and the buffer groove is located below the bearing platform.

7. The lens assembly according to claim 4, characterized in that: The base is provided with a plurality of fixing holes, and the plurality of fixing holes are respectively located on both sides of the bearing platform.

8. A laser, characterized in that: A lens assembly comprising any one of claims 1-7.

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