laser

Abstract

The present application discloses a laser, belonging to the field of optoelectronic technology. The laser comprises: a tube shell, which includes a bottom plate and a tubular side wall; a plurality of light-emitting components, which are located in a cavity surrounded by the bottom plate and the side wall; a sealing cover plate, which is annular and has an outer edge fixed to the surface of the side wall away from the bottom plate; a light-transmitting sealing layer, which is fixed to the inner edge of the sealing cover plate; a collimating lens group, which is located on the side of the sealing cover plate away from the bottom plate; wherein the inner wall or outer wall of the end of the side wall away from the bottom plate has a groove extending along the circumference of the side wall. The present application solves the problem of low yield in the manufacture of lasers. The present application is used for emitting light.

Description

Technical Field

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

[0002] With the development of optoelectronic technology, lasers are widely used.

[0003] like Figure 1 As shown, laser 00 includes a tube housing 001, multiple light-emitting components 002, a sealing cover plate 003, a light-transmitting sealing layer 004, and a collimating lens assembly 005. Tube housing 001 includes a base plate 0011 and an annular sidewall 0012. Sidewall 0012 and the multiple light-emitting components 002 are fixed to base plate 0011, and sidewall 0012 surrounds the multiple light-emitting components 002. Sealing cover plate 003 is an annular sheet metal component with a recessed inner edge. The outer edge of sealing cover plate 003 is welded to the surface of sidewall 0012 away from base plate 0011 using a parallel sealing technique. The edge of light-transmitting sealing layer 004 is fixed to the inner edge of sealing cover plate 003. Collimating lens assembly 005 is located on the side of sealing cover plate 004 away from base plate 0011.

[0004] When the sealing cover plate and the side wall of the tube shell are welded parallel to each other, the joint between the sealing cover plate and the side wall generates a lot of heat. This heat causes the sealing cover plate and the side wall to expand and generate a lot of stress. This stress is transmitted through the sealing cover plate to the light-transmitting sealing layer, making it more likely to crack. As a result, the production yield of the laser is low. Summary of the Invention

[0005] This application provides a laser that can solve the problem of low laser production yield. The technical solution is as follows: the laser includes:

[0006] a tube shell, the tube shell comprising a bottom plate and a tubular side wall;

[0007] A plurality of light-emitting components, wherein the plurality of light-emitting components are located in a cavity surrounded by the bottom plate and the side walls;

[0008] a sealing cover plate, the sealing cover plate being annular, and the outer edge of the sealing cover plate being fixed to the surface of the side wall away from the bottom plate;

[0009] a light-transmitting sealing layer, the light-transmitting sealing layer being fixed to the inner edge of the sealing cover plate;

[0010] a collimating lens assembly, located on a side of the sealing cover plate away from the base plate;

[0011] The inner wall or outer wall of one end of the side wall away from the bottom plate has a groove extending along the circumference of the side wall.

[0012] The beneficial effects of the technical solution provided by this application include at least:

[0013] In the laser provided herein, the inner or outer wall of the sidewall of the tube shell at the end remote from the base plate has a groove extending along the circumference of the sidewall. This results in a thinner wall at the location of the groove. When the sidewall and sealing cover plate are heated, the stress generated by them more easily causes the sidewall at the location of the groove to deform, absorbing more of the stress. This, in turn, reduces the stress transferred to the light-transmitting sealing layer, lowering the risk of cracking the light-transmitting sealing layer and improving the laser manufacturing yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of 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.

[0015] Figure 1 It is a structural diagram of a laser provided by related technology;

[0016] Figure 2 This is a schematic structural diagram of a laser provided in an embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the decomposed structure of a laser provided in an embodiment of the present application;

[0018] Figure 4 1 is a schematic structural diagram of another laser provided in an embodiment of the present application;

[0019] Figure 5 This is a schematic structural diagram of a tube shell provided in an embodiment of the present application;

[0020] Figure 6 This is a schematic diagram of the exploded structure of a tube shell provided in an embodiment of the present application;

[0021] Figure 7 This is a structural diagram of another tube shell provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0023] With the development of optoelectronic technology, the application of lasers is becoming more and more extensive. For example, lasers can be used in welding and cutting processes, and can be used as light sources in laser projection or laser television. The following embodiments of this application provide a laser that can reduce the risk of cracking the light-transmitting sealing layer in the laser and improve the production yield of the laser.

[0024] Figure 2 is a schematic structural diagram of a laser provided in an embodiment of the present application, Figure 3 This is a schematic diagram of the decomposed structure of a laser provided in an embodiment of the present application. Figure 4 This is a schematic diagram of the structure of another laser provided in an embodiment of the present application. Figure 2 Can be Figure 3 Schematic diagram of the cross section a-a' of the laser shown, Figure 4 Can be Figure 2 and Figure 3 A top view of the . Figure 2 As shown, the laser 10 may include: a tube shell 101, a plurality of light-emitting components 102, a sealing cover 103, a light-transmitting sealing layer 104 and a collimating lens group 105. It should be noted that, Figure 3 The light-emitting components in the laser are not shown.

[0025] The tube shell 101 may include a base plate 1011 and a tubular side wall 1012, and the multiple light-emitting components 102 are located in a cavity surrounded by the base plate 1011 and the side wall 1012. Optionally, the base plate 1011 and the side wall 1012 in the tube shell 101 may be an integral structure, or may be independent structures, which are welded together to form the tube shell 101. In the embodiment of the present application, the side wall 1012 is taken as an example of a square tubular structure. Optionally, the side wall 1012 may also be a circular tubular structure, a pentagonal tubular structure or a tubular structure of other shapes, which is not limited in the embodiment of the present application. The inner wall and / or outer wall of the side wall 1012 at one end away from the base plate 1011 has a groove K extending along the circumference of the side wall 1012. Figure 2 Taking the example of a case where only the outer wall of the side wall 1012 has a groove K, alternatively, only the inner wall of the side wall 1012 may have a groove, or both the outer wall and the inner wall may have grooves, which is not limited in this embodiment of the present application. The sealing cover plate 103 is annular, and the outer edge of the sealing cover plate 103 is fixed to the surface of the side wall 1012 away from the base plate 1011. The light-transmitting sealing layer 104 is fixed to the inner edge of the sealing cover plate 103, such as the edge of the light-transmitting sealing layer 104 is fixed to the inner edge of the sealing cover plate 103. The collimating lens assembly 105 is located on the side of the sealing cover plate 103 away from the base plate 1011.

[0026] In the embodiment of the present application, the thickness of the outer edge of the sealing cover plate 103 can be less than a preset thickness threshold. The thickness of the outer edge is relatively thin, and the outer edge can be fixed to the surface of the side wall 1012 away from the bottom plate using a parallel sealing welding technique. The inner edge of the sealing cover plate 103 can be recessed toward the bottom plate 1011 relative to the outer edge. Optionally, the sealing cover plate 103 can be a sheet metal part, and the thickness of each position of the sealing cover plate 103 is the same or approximately the same. The sealing cover plate 103 can be made by a sheet metal process, such as by stamping an annular plate structure so that appropriate positions in the plate structure are bent, recessed, or protruded to obtain the sealing cover plate provided in the embodiment of the present application.

[0027] It should be noted that when the outer edge of the sealing cover plate 103 is secured to the sidewall 1012 of the housing 101 using a parallel welding technique, the sealing cover plate 103 is first placed on the side of the housing 101 sidewall 1012 away from the base plate 1011, with the outer edge of the sealing cover plate 103 overlapping the surface of the sidewall 1012 of the housing 101 away from the base plate 1011. A welding device is then used to heat the outer edge, melting the connection between the outer edge and the sidewall 1012, and then welding the outer edge to the sidewall 1012 of the housing 101. Optionally, before securing the sealing cover plate 103 to the housing 101, the light-transmitting sealing layer 104 can be secured to the sealing cover plate 103. For example, a sealant can be used to secure the edge of the light-transmitting sealing layer 104 to the inner edge of the sealing cover plate 103. The sealant can include glass melt, low-temperature glass solder, epoxy sealant, or other sealants. The sealing glue can cover the side surfaces of the light-transmitting sealing layer to ensure the reliability of the adhesion to the light-transmitting sealing layer.

[0028] During parallel welding, the tube housing 101 and sealing cover plate 103 expand due to heat, generating significant stress. Because the sidewall portion of the tube housing 101's sidewall 1012, where the groove K is located, is relatively thin, this portion of the sidewall is more susceptible to deformation under the influence of this stress, such as becoming uneven. However, this deformation can be less than a predetermined deformation threshold, meaning that the deformation is relatively small. This effectively converts this stress into mechanical force, thereby absorbing the stress and minimizing the stress transmitted to the light-transmitting sealing layer 104.

[0029] In the embodiment of the present application, the collimating lens group 105 is used to collimate the light emitted by the light emitting component before emitting it. It should be noted that collimating the light is to converge the light, so that the divergence angle of the light becomes smaller and closer to parallel light. The collimating lens group 105 may include multiple collimating lenses, which can correspond one-to-one with the multiple light emitting components 102 in the laser. The light emitted by each light emitting component can be directed to the corresponding collimating lens, and then collimated by the collimating lens before being emitted.

[0030] In the embodiment of the present application, after the sealing cover plate 103 is fixed to the tube shell 101, the collimating lens group 105 can be suspended on the side of the sealing cover plate 103 away from the bottom plate to debug the light collimation effect. After debugging and determining the position of the collimating lens group 105, if it is determined that the position of the collimating lens group can ensure that the light emitted by each light-emitting component 102 can pass through the corresponding collimating lens, an adhesive is applied to the outer edge of the sealing cover plate 103, and then the collimating lens group 105 is fixed to the sealing cover plate 103 using the adhesive. Since the position of the collimating lens group 105 can be adjusted, even if the heat generated when fixing the sealing cover plate 103 causes the side wall 1012 to deform slightly, the position of the collimating lens group 105 can be adjusted to compensate for the effect of the deformation of the side wall 1012 on the light emission of the light-emitting component 102, thereby ensuring normal light emission of the laser 10.

[0031] In summary, in the laser provided by the embodiments of the present application, the inner or outer wall of the sidewall of the tube shell at the end away from the base plate has a groove extending along the circumference of the sidewall. This results in a thinner wall thickness at the location of the groove. When the sidewall and sealing cover plate are heated, the stress generated by them more easily causes the sidewall at the location of the groove to deform, thereby absorbing more stress. This, in turn, reduces the stress transmitted to the light-transmitting sealing layer, lowering the risk of cracking the light-transmitting sealing layer and improving the production yield of the laser.

[0032] like Figure 2 As shown, the multiple collimating lenses in the collimating lens group 105 can be integrally formed, and the side of the collimating lens group 105 away from the bottom plate 1011 of the tube shell 101 can have multiple convex curved surfaces that are curved toward the side away from the bottom plate 1011. The portion where each convex curved surface is located can serve as a collimating lens, and thus the collimating lens group can be regarded as including multiple collimating lenses. The collimating lens can be a convex lens in a plano-convex form, and the collimating lens can have a convex curved surface and a plane. The convex curved surface and the plane can be two opposite surfaces. The plane can be parallel to the plate surface of the bottom plate 1011 and be arranged close to the bottom plate 1011. Each convex curved surface of the collimating lens group 105 can be a convex curved surface in a collimating lens. Optionally, the curvature radius of the collimating lens in the collimating lens group in the embodiment of the present application (that is, the curvature radius of the convex curved surface in the collimating lens) can range from 1 mm to 4.5 mm.

[0033] Optionally, on the bottom plate 1011, the orthographic projection of the outer edge of the sealing cover plate 103 is located within the orthographic projection of the surface of the side wall 1012 away from the bottom plate 1011, that is, the outer edge of the sealing cover plate 103 can be retracted relative to the outer wall of the side wall 1012 and does not extend beyond the side wall 1012. The maximum distance d1 between the outer edge of the sealing cover plate 103 and the outer edge of the side wall 1012 can be less than 0.1 mm. For example, the maximum distance d1 can be 0.05 mm. Optionally, the outer edge of the sealing cover plate 103 and the outer edge of the side wall 1012 can form a similar concentric shape (e.g., both are rectangular). In this case, the distance between the outer edge of the sealing cover plate 103 and the outer edge of the side wall 1012 at all locations is equal, and this distance can be less than 0.1 mm, such as 0.05 mm. Because the surface of the sealing device that contacts the object being welded is an inclined surface, and the outer edge of the outer edge portion is retracted relative to the outer edge of the side wall, this ensures that the inclined surface of the sealing device can simultaneously contact the outer edge of the sealing cover plate and the surface of the side wall away from the base plate, thereby causing both the outer edge and the side wall to melt, achieving a better parallel sealing effect. Optionally, the outer edge of the side wall of the tube shell can also overlap with the outer edge of the sealing cover plate, which is not limited in this embodiment of the application.

[0034] In the embodiment of the present application, the inner edge of the sealing cover plate 103 is recessed toward the base plate relative to the outer edge. The outer edge of the sealing cover plate is an annular plate-shaped structure. The width of the outer edge can be wider than the width of the surface of the side wall 1012 away from the base plate 1011. The difference between the width of the outer edge portion W2 and the width of the side wall 1012 away from the base plate 1011 can be less than a set threshold. In other words, the width of the outer edge can be slightly wider than the width of the side wall 1012 away from the base plate 1011. It should be noted that any annular structure described in the embodiments of the present application refers to the width of the annular ring.

[0035] In the embodiment of the present application, the groove K may be a U-shaped groove or a rectangular groove (or may also be called a square groove). A U-shaped groove is a groove with a U-shaped cross section, and a rectangular groove is a groove with a rectangular cross section, the cross section being perpendicular to the extension direction of the groove. Optionally, the groove may include two side surfaces and a bottom surface connecting the two side surfaces. The bottom surface of the U-shaped groove may not be a plane, and the bottom surface of the rectangular groove may be a plane. In the embodiment of the present application, Figure 2 and Figure 3 Taking the groove as a rectangular groove as an example, the groove can optionally be a groove of other shapes, such as a trapezoidal groove, a V-shaped groove or a semicircular groove, and the groove can also include only one groove surface or two side surfaces, which is not limited in the embodiments of the present application.

[0036] In the embodiment of the present application, the wall thickness d2 at the location of the groove K in the sidewall 1012 can be less than or equal to 0.6 mm, such as 0.25 mm. It should be noted that the wall thickness at the location of the groove in the sidewall can include the wall thickness at any location in the sidewall where the groove is located. Optionally, if the groove includes a groove surface parallel to the inner wall of the sidewall, such as a rectangular groove with a bottom surface parallel to the inner wall, then the wall thickness at each location in the sidewall where the groove is located is the same, such as 0.25 mm. If the bottom surface of the groove is not parallel to the inner wall of the sidewall (such as a U-shaped groove), then the wall thickness at each location in the sidewall where the groove is located is different. In the embodiment of the present application, regardless of whether the wall thickness at each location in the sidewall where the groove is located is the same, the wall thickness at each location can be less than or equal to 0.6 mm. This ensures that the wall thickness at the location of the groove in the sidewall is thinner, and the sidewall at the location of the groove is more easily deformed under the stress generated by the thermal expansion of the tube shell, thereby more easily absorbing the stress.

[0037] In this embodiment of the present application, the groove K at the end of the sidewall 1012 away from the base plate 1011 can surround the entire inner annular surface of the sidewall 1012. The extension path of the groove K can be the same shape as the sidewall 1012. For example, if the sidewall 1012 has a square tubular structure, the extension path of the groove K can be rectangular. Alternatively, if the sidewall has a circular tubular structure, the extension path of the groove K can be circular.

[0038] It should be noted that the embodiment of the present application takes the example of a sidewall having only one groove on the outer wall, and the groove encircling the entire inner annular surface of the sidewall. Optionally, the sidewall may also have multiple grooves. For example, the extension path of each of the multiple grooves may be rectangular, and each groove encircles the inner annular surface of the sidewall. For example, the multiple grooves may be arranged sequentially on the sidewall in a direction away from the base plate. For another example, the extension path of the multiple grooves may not be rectangular, and may not encircle the entire inner annular surface of the sidewall. For example, each of the multiple grooves may be a strip-shaped groove extending in only one direction, and the multiple grooves may be arranged on different sides of the sidewall. For example, if the sidewall is a square tubular structure, the sidewall may have four grooves located on four sides of the sidewall, and the length of each groove may be less than or equal to the length of the side of the sidewall where the groove is located. Alternatively, the sidewall may have grooves located on only three or two sides thereof, and the embodiment of the present application is not limited thereto. Optionally, some of the multiple grooves may be located on the outer wall of the side wall, some may be located on the inner wall of the side wall, or all may be located on the inner wall or outer wall of the side wall, which is not limited in the embodiment of the present application.

[0039] Optionally, in an embodiment of the present application, the distance d3 between the surface of the side wall 1012 of the tube shell 101 that is parallel to and away from the bottom plate 1011 and the groove K may also be less than or equal to 0.6 mm, such as the distance may be 0.25 mm, and the surface of the side wall 1012 that is parallel to and away from the bottom plate 1011 is also the surface fixed to the outer edge of the sealing cover plate 103. It should be noted that the distance between the surface and the groove may include the minimum distance between each position in the surface and the groove in the direction perpendicular to the bottom plate. Optionally, the groove surface close to the surface in the groove may be parallel to the surface, and the minimum distance between each position in the surface and the groove may be equal, and are all the distances between the groove surface and the surface, such as all are 0.25 mm. If the minimum distances between different positions in the surface and the groove are different, the minimum distances between the different positions and the groove may also be less than or equal to 0.6 mm. For example, Figure 2 As shown, the groove K is a rectangular groove. The surface of the sealing cover plate 103 that is parallel to and away from the bottom plate 1011 is parallel to the groove surface of the groove K that is close to the surface. The distance d3 between the surface and the groove K can be equal to the wall thickness d2 of the side wall where the groove is located. When the outer edge of the sealing cover plate is fixed to the side wall of the tube shell using a sealing welding device, it is necessary to melt the connection between the outer edge of the sealing cover plate and the side wall. In the related art, the side wall of the tube shell is a tubular structure with both the inner and outer walls being flat, and the height of the side wall is relatively large. Therefore, the melting rate of the side wall under the action of the sealing welding device is slow and difficult. In the embodiment of the present application, the distance d3 between the surface of the side wall that is parallel to and away from the bottom plate and the groove is smaller. Therefore, the thickness of the portion of the side wall between the surface and the groove in the direction perpendicular to the bottom plate is thinner, and this portion is easier to melt under the action of the sealing welding device, thereby improving the efficiency of the sealing welding of the sealing cover plate and the welding strength of the sealing cover plate and the side wall can be higher.

[0040] There are multiple ways to prepare the sidewalls of the embodiment of the present application, two of which are described below:

[0041] In a first optional implementation, the inner wall or outer wall of a tubular structure with both inner and outer walls being flat can be machined to form a groove, thereby obtaining Figure 2 For example, a tool (such as a milling cutter) is used to grind or mill a specific position in the tubular structure to form a groove at the position, or an etching process can be used to etch a specific position in the tubular structure to form a groove.

[0042] In the second alternative implementation, please refer to Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of a tube shell provided in an embodiment of the present application. Figure 6 This is a schematic diagram of the exploded structure of a tube shell provided in an embodiment of the present application. Figure 5 Can be Figure 6 Schematic diagram of the cross section b-b' of the tube shell shown. The side wall 1012 may include a first tubular structure 1012a and a second tubular structure 1012b. The first tubular structure 1012a is fixed to the base plate 1011, and the second tubular structure 1012b is fixed to the surface of the first tubular structure 1012a away from the base plate 1012a. The first tubular structure 1012a may be a tubular structure with a flat inner wall and an outer wall, and the second tubular structure 1012b has a groove K. That is, the second tubular structure 1012b is the end of the side wall 1012 away from the base plate 1011, and the groove K of the side wall 1012 is the groove of the second tubular structure 1012b. It should be noted that the materials of the first tubular structure 1012a and the second tubular structure 1012b may be the same or different, and this embodiment of the application does not limit this.

[0043] For example, the second tubular structure 1012b can be a sheet metal part, and can be obtained by stamping an annular plate structure through a sheet metal process to make a specific area concave or convex, thereby obtaining the second tubular structure. For example, the two ends of an annular plate structure can be bent outward, or the area between the two ends of the annular plate structure can be concave inward to obtain the second tubular structure. Figure 5 and Figure 6 The second tubular structure 1012b is shown. Optionally, the second tubular structure 1012b can be fixed to the surface of the first tubular structure 1012a away from the base plate 1011 by brazing. Optionally, the surface of the first tubular structure 1012a away from the base plate 1011 and the surface of the second tubular structure 1012b close to the base plate 1011 can be congruent in shape, and the orthographic projections of the first tubular structure 1012a and the second tubular structure 1012b on the base plate can completely overlap.

[0044] In this embodiment of the present application, the cross-section of the sidewall at the end away from the bottom plate can have a square wave shape extending perpendicular to the bottom plate. This cross-section is perpendicular to the bottom plate, and the square wave can have one, two, three, or even more wave periods. For example, for the second optional implementation of the sidewall described above, the cross-section of the second tubular structure 1012b can have a square wave shape extending along the length of the second tubular structure 1012b. Figure 7 This is a schematic diagram of the structure of another tube shell provided in an embodiment of the present application. Figure 7 As shown, the square waveform of the cross section of the second tubular structure 1012b has two wave periods, that is, there is a groove K on each of the inner wall and the outer wall of the second tubular structure 1012b.

[0045] The cross section of the side wall at one end away from the bottom plate is a square wave extending in a direction perpendicular to the bottom plate, that is, the groove on the side wall is a rectangular groove. If the square wave has multiple wave periods, that is, the side wall at one end away from the bottom plate has multiple grooves, and the multiple grooves are alternately arranged on the inner wall and the outer wall of the side wall in the direction perpendicular to the bottom plate. Optionally, the sizes of the multiple grooves can be the same or different, which is not limited in the embodiment of the present application. The size of the groove can include the depth and width of the groove, please refer to Figure 5 The depth d4 of the groove is the distance between the opening of the groove and the bottom of the groove. The depth d4 of a groove is the maximum thickness d7 of the side wall and the wall thickness d2 of the side wall where the groove is located (for the distance indicated by d2, please refer to Figure 2 ), the width d5 of the groove is also the size of the opening of the groove in the extension direction perpendicular to the groove.

[0046] For example, the maximum thickness of the side wall in the embodiment of the present application can be in the range of 1.2 mm to 2.5 mm. Since the wall thickness d2 of the groove in the side wall is less than 0.6 mm, the depth of the groove in the embodiment of the present application can be in the range of 0.6 mm to 1.9 mm. In the embodiment of the present application, the length d8 of the side wall portion where the groove is located in the direction perpendicular to the bottom plate (for the distance indicated by d8, please refer to Figure 7 ) can range from 0.6 mm to 4 mm. In the embodiment of the present application, the number of grooves on the side wall can be one, two, three or even more. Therefore, in the embodiment of the present application, the maximum width range of the groove can be less than 4 mm. It should be noted that in the embodiment of the present application, the length d8 of the side wall portion where the groove is located (that is, the portion with thinner wall thickness in the side wall) in the direction perpendicular to the bottom plate is relatively small, so it can be ensured that the side wall still has a high strength and ensures that the side wall effectively protects the components inside the tube shell. Optionally, the distance between adjacent grooves in the multiple grooves (such as Figure 7 The distance d6 between two adjacent grooves can be less than or equal to 0.6 mm. For example, the distance d6 can be equal to the wall thickness d2 of the side wall where the groove is located, such as 0.25 mm. When the side wall has multiple grooves, the width of each groove can be designed according to the number of the multiple grooves. Optionally, when the side wall has multiple grooves, the width d5 of each groove can be equal, and the distance d6 between adjacent grooves can also be equal, and the distance d6 can be equal to the distance d3 between the surface of the side wall parallel to and away from the bottom plate and the groove. In this case, the width of each groove d5 = d8 - n*d6, where n is the number of the multiple grooves.

[0047] In the embodiment of the present application, the cross-section of one end of the side wall far from the bottom plate is in a square wave shape extending in a direction perpendicular to the bottom plate, and the square wave has one, two or three wave periods. It can also be said that the cross-section of one end of the side wall far from the bottom plate is in a C shape, a Z shape or a bow shape. Among them, if only the inner wall or the outer wall of the side wall has one groove, the cross-section can be in a C shape; if the inner wall and the outer wall of the side wall each have one groove, the cross-section can be in a Z shape or an S shape; if one of the inner wall and the outer wall of the side wall has one groove and the other has two grooves, the cross-section can be in a bow shape.

[0048] In the embodiment of the present application, the side wall far from the bottom plate has a plurality of grooves arranged in a direction perpendicular to the bottom plate, which can make the end of the side wall far from the bottom plate have a plurality of bending structures (such as Figure 7 the bending structure W in). In this way, when the side wall generates stress due to heat, each bending structure can correspondingly deform in its bending direction to further enhance the stress absorption effect. In the embodiment of the present application, taking the bending parts of the bending structure as square corners as an example, optionally, the bending parts of the bending structure can have chamfers or rounded corners to avoid too much stress concentration at the bending parts.

[0049] In the embodiment of the present application, please continue to refer to Figure 2 and Figure 3 , the light-emitting component 102 can include a light-emitting chip 1021, a heat sink 1022 and a reflection prism 1023. The heat sink 1022 can be arranged on the bottom plate 1011 of the tube shell 101, the light-emitting chip 1021 can be arranged on the heat sink 1022, and the heat sink 1022 is used to assist the light-emitting chip 1021 in heat dissipation. The reflection prism 1023 can be located on the light-emitting side of the light-emitting chip 1021. The light emitted by the light-emitting chip 1021 can be directed to the reflection prism 1023, and then reflected on the reflection prism 1023 and pass through the light-transmitting sealing layer 104 to be emitted. Exemplarily, the plurality of light-emitting chips can all emit light of the same color, or different light-emitting chips among the plurality of light-emitting chips can emit light of different colors, which is not limited in the embodiment of the present application. The light emitted by the light-emitting chip can be laser. A large amount of heat is generated when the light-emitting chip 1021 is working, and then the heat is transferred to the bottom plate 1011 through the heat sink 1022, and then conducted to the side wall 1012 through the bottom plate 1011. At this time, the effect of the heat on the side wall 1012 is the same as the effect of the heat generated by parallel sealing on the side wall 1012, and the part of the side wall where the groove is located will also deform to a certain extent under the action of the heat to absorb stress. Optionally, after the light-emitting chip stops working and cools down, the side wall can recover to its original state to release stress.

[0050] Optionally, the multiple light-emitting components in the laser may include light-emitting chips arrayed in multiple rows and columns on the bottom plate of the tube shell. The laser may be a multi-chip laser diode (MCL) laser. The distance between adjacent light-emitting chips in a first direction may range from 2 to 4 mm, such as 3 mm. The first direction may be the light emission direction of the light-emitting chips. In a second direction perpendicular to the first direction, the distance between adjacent light-emitting chips may range from 3 to 6 mm, such as 4 mm.

[0051] In the embodiment of the present application, the light-transmitting sealing layer 104 may be a plate-like structure. The plate-like structure may include two parallel larger surfaces and a plurality of smaller side surfaces connecting the two surfaces. The side surfaces of the light-transmitting sealing layer 104 may be sealed with a sealant ( Figure 2 The light-transmitting sealing layer is fixed to the inner edge of the sealing cover plate 103 (not shown). In the embodiment of the present application, the light-transmitting sealing layer can be directly fixed to the sealing cover plate, or the laser can further include a support frame, and the light-transmitting sealing layer can be first fixed to the support frame, and then the support frame is fixed to the sealing cover plate. For example, the support frame can be a letter box, so that the middle area of the light-transmitting sealing layer can be supported by the support frame, thereby improving the setting firmness of the light-transmitting sealing layer. Optionally, a brightness enhancement film can be attached to at least one of the surfaces of the light-transmitting sealing layer close to the base plate and the surface away from the base plate to increase the brightness of the light output of the laser.

[0052] In the embodiment of the present application, the tube shell 101, the sealing cover plate 103, and the light-transmitting sealing layer 104 can form a sealed space, so that the light-emitting component 102 can be placed in the sealed space, preventing water and oxygen from corroding the light-emitting component 102. Since the risk of cracking of the light-transmitting sealing layer 104 is reduced, the sealing effect of the sealed space can be ensured, thereby extending the life of the light-emitting component.

[0053] In the embodiment of the present application, the tube shell can be made of copper, such as oxygen-free copper, the light-transmitting sealing layer can be made of glass, and the sealing cover plate can be made of stainless steel. Because the thermal expansion coefficient of stainless steel is greater than that of glass and less than that of oxygen-free copper, the difference in thermal expansion coefficients between the connected components is small, which can appropriately alleviate the stress transferred to the sealing cover plate and sealing glass due to the thermal expansion of the oxygen-free copper tube shell, further improving the production yield of the laser.

[0054] It should be noted that copper has a high thermal conductivity. In the embodiments of the present application, the housing is made of copper. This ensures that the heat generated by the light-emitting components mounted on the bottom plate of the housing during operation can be quickly conducted through the housing and dissipated, preventing heat accumulation and damage to the light-emitting components. Alternatively, the housing can be made of one or more of aluminum, aluminum nitride, and silicon carbide. In the embodiments of the present application, the sealing cover plate can also be made of other Kovar materials, such as an iron-nickel-cobalt alloy or other alloys. The light-transmitting sealing layer can also be made of other highly transparent and reliable materials, such as resin.

[0055] Please continue to refer to Figure 3 、 Figure 4 and Figure 6 The sidewall 1012 of the housing 101 may have multiple openings on opposite sides. The laser 10 may also include: multiple conductive pins 106. These conductive pins 106 may extend into the housing 101 through the openings in the sidewall 1012 and be fixed to the housing 101. The conductive pins 106 may be electrically connected to the electrodes of the light-emitting chip in the light-emitting assembly 102 to transmit external power to the light-emitting chip, thereby stimulating the light-emitting chip to emit light. Optionally, the aperture of the opening may be 1.2 mm, and the diameter of the conductive pins 106 may be 0.55 mm.

[0056] Optionally, in the embodiment of the present application, when assembling the laser, a groove can be first formed on the tubular structure, or a second tubular structure can be formed by sheet metal technology, and the second tubular structure can be brazed with the first tubular structure to obtain the side wall of the tube shell. The side wall of the tube shell can have multiple openings, and an annular solder structure (such as an annular glass bead) can be placed in the opening on the side wall of the tube shell, and the conductive pins are passed through the solder structure and the opening where the solder structure is located. Then, the side wall is placed on the four edges of the bottom plate, and an annular silver-copper solder is placed between the bottom plate and the side wall. Then, the structure of the bottom plate, side wall and conductive pin is placed in a high-temperature furnace for sealing and sintering. After the sealing is sintered and solidified, the bottom plate, side wall, conductive pin and solder can be a whole, thereby achieving airtightness at the side wall opening. The light-transmitting sealing layer can also be fixed to the sealing cover plate, such as the edge of the light-transmitting sealing layer is adhered to the inner edge of the sealing cover plate to obtain an upper cover assembly. The light-emitting component can then be welded to the bottom plate within the housing of the tube shell, and then the upper cover assembly can be welded to the surface of the side wall of the tube shell away from the bottom plate using parallel sealing technology. Finally, after aligning the position of the collimator lens group, the collimator lens group can be fixed to the side of the upper cover assembly away from the bottom plate using epoxy glue, thus completing the assembly of the laser. It should be noted that the above assembly process is only an exemplary process provided in the embodiment of the present application. The welding process used in each step can also be replaced by other processes, and the order of each step can also be adjusted accordingly. The embodiment of the present application does not limit this.

[0057] It should be noted that the above embodiments of this application are described using the base plate and side walls of the tube shell as two separate structures that need to be assembled. Optionally, the base plate and side walls can also be formed integrally. This can prevent wrinkles on the base plate due to the different thermal expansion coefficients of the base plate and side walls during high-temperature welding, thereby ensuring the flatness of the base plate, ensuring the reliable installation of the light-emitting component on the base plate, and ensuring that the light emitted by the light-emitting chip is emitted according to the predetermined emission angle, thereby improving the light-emitting effect of the laser.

[0058] In summary, in the laser provided by the embodiments of the present application, the inner or outer wall of the sidewall of the tube shell at the end away from the base plate has a groove extending along the circumference of the sidewall. This results in a thinner wall thickness at the location of the groove. When the sidewall and sealing cover plate are heated, the stress generated by them more easily causes the sidewall at the location of the groove to deform, thereby absorbing more stress. This, in turn, reduces the stress transmitted to the light-transmitting sealing layer, lowering the risk of cracking the light-transmitting sealing layer and improving the production yield of the laser.

[0059] It should be noted that in the embodiments of this application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, A and / or B can represent three situations: A exists alone, A and B exists simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise explicitly defined. "Substantially" means that within an acceptable error range, a person skilled in the art can solve the described technical problem and substantially achieve the described technical effect. In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It should also be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or there can be an intervening layer. Similar reference numerals throughout the document indicate similar elements.

[0060] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A laser, characterized in that: The laser comprises: a tube shell, the tube shell comprising a bottom plate and a tubular side wall; A plurality of light-emitting components, wherein the plurality of light-emitting components are located in a cavity surrounded by the bottom plate and the side walls; a sealing cover plate, the sealing cover plate being annular, and the outer edge of the sealing cover plate being fixed to the surface of the side wall away from the bottom plate; a light-transmitting sealing layer, the light-transmitting sealing layer being fixed to the inner edge of the sealing cover plate; a collimating lens assembly, located on a side of the sealing cover plate away from the base plate; In which, the side wall includes a first tubular structure and a second tubular structure; the first tubular structure is fixed on the base plate, the second tubular structure is fixed on the surface of the first tubular structure away from the base plate, and the inner wall and / or outer wall of the end of the second tubular structure away from the base plate has a groove extending along the circumference of the side wall; the groove has a bending structure, and the bending part of the bending structure has a chamfer or rounded corner.

2. The laser according to claim 1, characterized in that The wall thickness of the side wall where the groove is located is less than or equal to 0.6 mm.

3. The laser according to claim 1, characterized in that A distance between a surface of the side wall that is parallel to and away from the bottom plate and the groove is less than or equal to 0.6 mm.

4. The laser according to claim 1, characterized in that The groove is a U-shaped groove or a rectangular groove.

5. The laser according to claim 1, characterized in that The side wall is a square tubular structure, and the extension track of the groove is rectangular.

6. The laser according to any one of claims 1 to 5, characterized in that The second tubular structure is a sheet metal part.

7. The laser according to claim 6, characterized in that A cross section of the second tubular structure is in the shape of a square wave extending along a length direction of the second tubular structure, and the cross section is perpendicular to the bottom plate.

8. The laser according to any one of claims 1 to 5, characterized in that On the bottom plate, the orthographic projection of the outer edge of the sealing cover plate is located within the orthographic projection of the surface of the side wall away from the bottom plate, and the maximum distance between the outer edge of the sealing cover plate and the outer edge of the side wall is less than 0.1 mm.

9. The laser according to any one of claims 1 to 5, characterized in that The outer edge of the sealing cover plate is fixed to the surface of the side wall away from the bottom plate by parallel sealing welding technology.

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