Integrated line laser module
By simplifying the structure of the line laser module and combining the light source and integrated lens, the quality problem of line laser caused by the complex structure in the existing technology has been solved, and a higher quality and lower cost line laser module has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-17
AI Technical Summary
Existing line laser modules have complex structures, and the relative positional misalignment of the light source, collimating lens, and wave mirror affects the quality of the line laser.
The line laser module, which uses an integrated lens and light source, has its incident and exit surfaces made of freeform surfaces, which avoids the assembly process of collimating mirrors and wave mirrors and simplifies the structure.
It improves the quality of line lasers, reduces module size and cost, and avoids alignment errors during assembly.
Smart Images
Figure CN224005363U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of line laser technology, specifically to an integrated line laser module. Background Technology
[0002] Line laser sources typically refer to laser sources that output a straight line of structured light. Line laser modules have wide applications in many fields, such as 3D scanning, industrial measurement and positioning, and machine vision. The development of line laser technology continues to drive innovation and progress in various fields, providing higher accuracy, efficiency, and functionality for a variety of applications, especially in areas requiring high precision, fast response, and automated control.
[0003] Existing line laser modules generally consist of three parts: a light source / light source array, a collimating mirror, and a wave mirror. The structure is relatively complex. During the assembly process, the relative positional misalignment of the light source / light source array, the collimating mirror, and the wave mirror can affect the quality of the line laser. Utility Model Content
[0004] In view of this, the present invention provides an integrated line laser module to simplify the structure and improve the quality of the line laser.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] This utility model discloses an integrated line laser module, which includes an integrated lens and a light source;
[0007] The incident surface of the integrated lens is composed of either a freeform surface array or a freeform surface;
[0008] The exit surface of the integrated lens is composed of a free-form surface;
[0009] The integrated lens is located in the light emission direction of the light source. The light source emits light into the incident surface to form a linear beam, and the linear beam passes through the exit surface to form a line laser.
[0010] Preferably, the freeform surface array is composed of multiple rotationally symmetric surfaces or multiple non-rotationally symmetric surfaces.
[0011] Preferably, the freeform surface includes either a rotationally symmetric surface or a non-rotationally symmetric surface.
[0012] Preferably, the divergence angle between the incident surface and the exiting surface that diverges the incident light is between 0° and 150°.
[0013] Preferably, the radius of curvature of the incident surface in the x-direction is 0.08, and the radius of curvature in the y-direction is 2;
[0014] The aspheric coefficient of the incident surface in the x-direction is -1, and the aspheric coefficient in the y-direction is -10;
[0015] The higher-order coefficients α4, α6, and α8 along the x-direction of the incident surface are 0.035, -0.03, and -0.12, respectively, while the remaining higher-order coefficients are 0.
[0016] Preferably, the radius of curvature of the exit surface in the x-direction is 0, and the radius of curvature in the y-direction is -2.5;
[0017] The aspheric coefficient of the exit surface in the x-direction is 0, and the aspheric coefficient in the y-direction is -1;
[0018] The coefficients of all higher-order terms of the exit surface are 0.
[0019] Preferably, the integrated line laser module further includes: a substrate;
[0020] The light source is disposed in the substrate.
[0021] Preferably, the substrate and the integrated lens are bonded together with adhesive.
[0022] Preferably, the light source includes a light source array consisting of multiple light sources.
[0023] Preferably, the light source includes any one of the following: a light source composed of an edge-emitting laser diode, a VCSE single-aperture light source, and a multi-aperture light source.
[0024] An integrated line laser module based on the above-described embodiment of the present invention includes: an integrated lens and a light source; the incident surface of the integrated lens is composed of either a freeform surface array or a freeform surface; the exit surface of the integrated lens is composed of a freeform surface; the integrated lens is located in the light emission direction of the light source, the light source illuminates the incident surface to form a linear beam, and the linear beam passes through the exit surface to form a line laser. In this solution, the integrated line laser module consists of only a light source and an integrated lens, which has a simple structure and avoids the alignment errors that occur during the assembly of existing collimating lenses and wave mirrors, thereby improving the quality of the line laser. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0026] Figure 1 This is a diagram showing the light effect of a line laser module composed of a collimating lens and a wave mirror in the yz plane, as disclosed in an embodiment of this utility model.
[0027] Figure 2 This is a diagram showing the light effect of a line laser module composed of a collimating lens and a wave mirror in the yz plane, as disclosed in an embodiment of this utility model.
[0028] Figure 3 This is a structural diagram of an integrated line laser module disclosed in an embodiment of the present utility model;
[0029] Figure 4 This is a structural diagram of another integrated line laser module disclosed in an embodiment of the present utility model;
[0030] Figure 5 This is a 3D structural diagram of an integrated lens disclosed in an embodiment of the present utility model;
[0031] Figure 6 This is a 3D structural diagram of an integrated lens from another angle, as disclosed in an embodiment of the present utility model.
[0032] Figure 7 This is a diagram showing the light effect of the integrated lens in the xz plane according to an embodiment of the present invention;
[0033] Figure 8 This is a diagram showing the light effect of the integrated lens in the yz plane according to an embodiment of the present invention. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0035] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0036] As can be seen from the background technology, existing line laser modules generally consist of three parts: a light source / light source array, a collimating mirror, and a wave mirror.
[0037] like Figure 1 The image shown is a light effect diagram in the xz plane of a line laser module composed of a collimating mirror and a wave mirror disclosed in an embodiment of this utility model.
[0038] In this process, the light emitted from the light source / light source array is collimated by a collimating lens, and then, after passing through a wave mirror, the light in one direction is stretched and diffused. Assuming the z-axis is the optical axis, the stretching and diffusion effect in the xz plane is as follows: Figure 1 As shown.
[0039] like Figure 2 The image shown is a diagram of the light effect of a line laser module composed of a collimating mirror and a wave mirror in the yz plane, as disclosed in an embodiment of this utility model.
[0040] In this system, light rays emitted from the light source / light source array are collimated by a collimating lens, and then collimated by a wave mirror in the opposite direction. Assuming the z-axis is the optical axis, the collimation effect on the light rays formed in the yz plane is as follows: Figure 2 As shown.
[0041] Existing line laser modules have relatively complex structures. During assembly, the relative positional misalignment of the light source / light source array, collimating lens, and wave mirror can affect the quality of the line laser.
[0042] Therefore, this utility model embodiment discloses an integrated line laser module. In this solution, the integrated line laser module consists of only two parts: a light source and an integrated lens. The structure is simple, and it also avoids the alignment errors that occur during the assembly of existing collimating lenses and wave mirrors, thereby improving the quality of the line laser.
[0043] like Figure 3 The diagram shown is a structural diagram of an integrated line laser module disclosed in an embodiment of this utility model.
[0044] The integrated line laser module consists of an integrated lens and a light source.
[0045] The incident surface of the integrated lens is composed of either a freeform surface array or a freeform surface; the exit surface of the integrated lens is composed of a freeform surface.
[0046] An integrated lens is located in the direction of light emission from the light source. Light rays from the light source enter the incident surface to form a linear beam, and the linear beam passes through the exit surface to form a line laser.
[0047] like Figure 4 The diagram shown is a structural diagram of another integrated line laser module disclosed in this utility model embodiment.
[0048] Compared to Figure 3 The integrated line laser module shown has an added substrate.
[0049] The substrate contains a light source. The substrate and the integrated lens are bonded together with adhesive, and the incident surface of the integrated lens is located in the light emission direction of the light source in the substrate.
[0050] In one embodiment, the light source includes a light source array consisting of multiple light sources.
[0051] In one embodiment, the light source includes any one of a light source composed of an edge-emitting laser diode, a VCSE (Vertical-Cavity Surface-Emitting Laser) single-aperture light source, and a multi-aperture light source.
[0052] It should be noted that an edge-emitting laser diode (EEL) is a semiconductor laser whose laser beam is emitted from the edge of a chip. EELs typically feature high power, high directionality, and high brightness, making them suitable for a variety of optical applications.
[0053] A VCSE (Vertical-Cavity Surface-Emitting Laser) is a semiconductor laser whose laser beam is emitted perpendicular to the surface of a chip. A VCSEL single-aperture light source refers to a VCSEL chip with a single emission aperture, typically used in optical applications requiring high beam quality and compact size.
[0054] A porous light source is a special type of light source. It typically consists of a high-density LED array distributed at the bottom of the light source, with multiple holes formed on the surface of the light source. These holes can be circular, square, or elliptical, etc.
[0055] In one embodiment, the freeform surface array consists of multiple rotationally symmetric surfaces, or it can be composed of multiple non-rotationally symmetric surfaces.
[0056] It should be noted that rotationally symmetric surfaces include, for example, spheres. Non-rotationally symmetric surfaces have different curve equations in the X and Y directions.
[0057] In one embodiment, the incident and exit surfaces of the integrated lens are composed of freeform surfaces that are rotationally symmetric or non-rotationally symmetric.
[0058] In one embodiment, the divergence angle between the incident and exit surfaces of the integrated lens for diverging incident light rays is between 0° and 150°.
[0059] It should be noted that the height z of each point on the incident and exit surfaces of the integrated lens is expressed by the following formula:
[0060] (1)
[0061] 1. When using formula (1) to represent the height of each point on the incident surface of an integrated lens, the meaning and specific values of each structural parameter of the incident surface are as follows:
[0062] x is the horizontal coordinate, y is the vertical coordinate, x and y represent the positions of various points on the incident surface, and z is the height of the point (x, y) on the incident surface.
[0063] c x c is the curvature coefficient in the x-direction. x =1 / R x R x Let the radius of curvature be R. x =0.08; c y c is the curvature coefficient in the y-direction. y =1 / R y R y Let the radius of curvature be R. y =2.
[0064] k x k is the aspherical coefficient in the x-direction. x =-1; k y k is the aspherical coefficient in the y-direction. y =-10;
[0065] α i Let α₄, α₆, and α₈ be the coefficients of higher-order terms in the x-direction, respectively, and α₂, α₆, and α₈ be 0.035, -0.03, and -0.12, respectively. 10 α 12 α 14 and α 16 The values are 0 respectively.
[0066] β i The coefficients of the higher-order terms in the y-direction are β2, β4, β6, β8, and β. 10 β12 β 14 and β 16 The values are 0 respectively.
[0067] 2. When using formula (1) to represent the height of each point on the exit surface of the integrated lens, the meaning and specific values of each structural parameter of the exit surface are as follows:
[0068] x is the horizontal coordinate, y is the vertical coordinate, x and y represent the positions of various points on the incident surface, and z is the height of the point (x, y) on the incident surface.
[0069] c x c is the curvature coefficient in the x-direction. x =1 / R x R x Let the radius of curvature be R. x =0; c y c is the curvature coefficient in the y-direction. y =1 / R y R y Let the radius of curvature be R. y =-2.5.
[0070] k x k is the aspherical coefficient in the x-direction. x =0; k y k is the aspherical coefficient in the y-direction. y =-1.
[0071] α i Let α2, α4, α6, α8, α be the coefficients of the higher-order terms in the x-direction. 10 α 12 α 14 and α 16 The values are 0 respectively.
[0072] β i The coefficients of the higher-order terms in the y-direction are β2, β4, β6, β8, and β. 10 β 12 β 14 and β 16 The values are 0 respectively.
[0073] like Figure 5 The image shown is a 3D structural diagram of an integrated lens disclosed in an embodiment of this utility model.
[0074] like Figure 6 The image shown is a 3D structural diagram of an integrated lens from another angle, as disclosed in an embodiment of this utility model.
[0075] Figure 5 and Figure 6The 3D structure of the integrated lens is shown from two perspectives. The incident surface of the integrated lens is an array of freeform surfaces, which is composed of multiple freeform surfaces and presents a wave-like shape. The other side is the exit surface of the integrated lens, which is also a freeform surface.
[0076] like Figure 7 The image shown is a diagram of the light effect of the integrated lens in the xz plane according to an embodiment of this utility model.
[0077] like Figure 8 The image shown is a diagram illustrating the light effect of the integrated lens in the yz plane according to an embodiment of this utility model.
[0078] It should be noted that the light emitted by the light source or light source array is in a divergent state. After passing through the integrated lens incident surface (taking a freeform surface array with a wavy shape as an example), the light is diffused in one direction. Assuming the z-axis is the optical axis, the diffusion effect on the xz plane is as follows: Figure 7 As shown; however, the light is compressed and converged in another direction, and the compression and convergence effect on the yz plane is as follows. Figure 8 As shown.
[0079] The linear light beam formed by the incident surface of the integrated lens is further diffused in one direction after passing through the exit surface (freeform surface) of the integrated lens. The diffusion effect on the xz plane is as follows: Figure 6 As shown; while the light rays from the other direction are collimated, thus forming a line laser, the collimation effect on the yz plane is as follows. Figure 7 As shown.
[0080] Based on the above-described embodiment of the present invention, an integrated line laser module is provided. In this solution, the integrated line laser module consists of only two parts, and the simplified structure reduces the overall module size. Compared with the prior art, one lens is eliminated, reducing the overall module cost. The use of an integrated lens eliminates the assembly process of bonding and gluing the collimating lens and the wave mirror in the prior art, and also avoids the alignment error of the collimating lens and the wave mirror during assembly, thus improving the quality of the line laser. The incident surface of the integrated lens adopts a free-form surface array design, which improves the assembly tolerance between the light source / light source array and the integrated lens, and reduces the assembly difficulty.
[0081] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.
[0082] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.
[0083] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An integrated line laser module, characterized in that The integrated linear laser module comprises an integrated lens and a light source. The incident surface of the integrated lens is composed of any one of a free-form surface array and a free-form surface. The exit surface of the integrated lens is composed of a free-form surface. The integrated lens is located in the light exit direction of the light source, the light source emits light to the incident surface to form a linear light beam, and the linear light beam passes through the exit surface to form a linear laser.
2. The integrated line laser module of claim 1, wherein, The free-form surface array is composed of a plurality of rotationally symmetric curved surfaces or a plurality of non-rotationally symmetric curved surfaces.
3. The integrated line laser module of claim 1, wherein, The free-form surface includes any one of a rotationally symmetric curved surface and a non-rotationally symmetric curved surface.
4. The integrated line laser module of claim 1, wherein, The divergence angle of the incident surface and the exit surface for the incident light is between 0° and 150°.
5. The integrated line laser module of claim 1, wherein, The curvature radius of the incident surface in the x direction is 0.08, and the curvature radius in the y direction is 2. The asphericity coefficient of the incident surface in the x direction is -1, and the asphericity coefficient in the y direction is -10. The high-order term coefficient α4, the high-order term coefficient α6 and the high-order term coefficient α8 of the incident surface in the x direction are 0.035, -0.03 and -0.12 respectively, and the remaining high-order term coefficients are 0.
6. The integrated line laser module of claim 1, wherein, The curvature radius of the exit surface in the x direction is 0, and the curvature radius in the y direction is -2.
5. The asphericity coefficient of the exit surface in the x direction is 0, and the asphericity coefficient in the y direction is -1. Each high-order term coefficient of the exit surface is 0.
7. The integrated line laser module of claim 1, wherein, The integrated linear laser module further comprises a substrate. The substrate is provided with the light source.
8. The integrated line laser module of claim 7, wherein, The substrate and the integrated lens are bonded by glue.
9. The integrated line laser module of claim 1, wherein, The light source comprises a light source array composed of a plurality of light sources.
10. The integrated laser module of any one of claims 1 to 9, wherein, The light source comprises any one of a light source composed of an edge-emitting laser diode, a VCSE single-hole light source and a multi-hole light source.