Focusing-free laser module
By designing a focus-free laser module, using angle-set lenses and light source positioning slots, combined with cylindrical structure focusing lenses and lenses, the problem of inaccurate lens positions in traditional laser modules during transportation or vibration is solved, and the fixed positioning of the laser light source is realized, avoiding manual correction, improving production efficiency and reducing costs.
Patent Information
- Application Number
- CN202421405033.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The traditional laser modules are loose during transportation or vibration, resulting in inaccurate lens position, and the circular package cannot achieve 45° crossing of the DOE pattern and laser angle, resulting in uneven divergence angles, requiring manual correction of complex fixtures, and inefficient efficiency.
A focusing-free laser module is designed, using an angle-set lens positioning groove and a light source positioning groove. Combining the cylindrical structure of the focusing lens and lens, the fixed positioning of the laser light source is achieved, avoiding the looseness of the lens and manual correction.
It realizes efficient patch processing of laser modules, eliminates complex correction fixtures, improves production efficiency, and reduces production costs and losses.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to a laser device, in particular to a focus-free laser module. Background Art
[0002] The laser module is used to emit linear lasers. The lens part of the traditional laser module is fixed by a fastener, and the fastener is screwed into the lens mounting part. When the laser module is in the process of transportation or vibration, the fastener will become loose, which will cause the lens to loosen and shift. Since the position of the lens is set, when it moves, the laser positioning will be inaccurate.
[0003] The existing laser module is a plug-in soldered on the terminal motherboard, and cannot be directly automatically mounted. The laser module has vertical and parallel angles. Due to the circular package of the existing laser module, the DOE pattern and the laser cannot directly intersect at 45° relative to each other, resulting in the DOE pattern horizontally and vertically. The width difference is inconsistent due to the divergence angle cannot be evenly distributed, and it can only be manually corrected by complex jigs, which is very inefficient.
[0004] In view of this, the traditional laser module needs to be improved. Utility Model Content
[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a focus-free laser module, the purpose of designing the laser module is to improve product processing efficiency and eliminate complex calibration fixtures.
[0006] In order to solve the above technical problems, the present invention is implemented by the following scheme: A focus-free laser module of the present invention comprises:
[0007] A mold shell having two ends connected to form a through cavity, a lens positioning groove, a focusing lens positioning cavity, an optical channel and a light source positioning groove are sequentially arranged along the first end to the second end of the through cavity, and the lens positioning groove and the light source positioning groove are arranged at an angle;
[0008] A lens, fixed in the lens positioning groove;
[0009] A focusing lens is placed in the focusing lens positioning cavity and is tightly fixed by the lens;
[0010] A light source module comprises a laser light source and a PCB substrate, wherein the laser light source is mounted on the PCB substrate, and after the PCB substrate and the mold shell are fixed, the laser light source is located in the light source positioning groove.
[0011] Furthermore, the lens positioning groove is a first square groove, the light source positioning groove is a second square groove, and the angle between the length direction of the first square groove and the length direction of the second square groove is 45 degrees.
[0012] Furthermore, two relatively long sides of the lens positioning groove are symmetrically provided with glue fixing grooves.
[0013] Furthermore, the lens is glued to the lens positioning groove.
[0014] Furthermore, the focusing lens is a cylindrical structure, and both sides thereof are set as circular grooves, wherein the bottom surface of one circular groove is a plane, and the bottom surface of the other circular groove is a convex surface, and the convex surface faces the lens.
[0015] Furthermore, the optical channel is a first cylindrical cavity, the focusing lens positioning cavity is a second cylindrical cavity, the diameter of the first cylindrical cavity is smaller than the diameter of the second cylindrical cavity, the first cylindrical cavity intersects with the center of the light source positioning groove, and the second cylindrical cavity intersects with the center of the lens positioning groove.
[0016] Furthermore, the PCB substrates are glued to each other.
[0017] Furthermore, the first surface of the PCB substrate is provided with an LD pad, and the second surface thereof is provided with a bottom pad, and the length direction of any LD pad is at an angle of 45 degrees with the length direction of any bottom pad.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] 1. The laser module of the utility model can be directly processed in a patch manner. Compared with the existing plug-in form, the processing efficiency is significantly improved and the processing cost is saved.
[0020] 2. The base PCB pad and the shell of the utility model are both angle-positioned, which eliminates the need for complex calibration jigs during assembly, debugging, and calibration, avoids the problem of deviation caused by manual calibration, improves production efficiency, and reduces production losses and costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is an exploded view of the laser module of the utility model.
[0022] Figure 2 This is a perspective structural diagram of the mold shell of the utility model.
[0023] Figure 3 This is another perspective structural diagram of the mold shell of the utility model.
[0024] Figure 4 This is a structural diagram of the focusing lens of the utility model.
[0025] Figure 5 This is a structural diagram of the first side of the visible PCB substrate of the utility model.
[0026] Figure 6 This is a structural diagram of the second side of the visible PCB substrate of the utility model.
[0027] Figure 7 This is the assembly diagram of the laser module of the utility model.
[0028] Markings in the accompanying drawings: PCB substrate 1, laser light source 2, mold shell 3, focusing lens 4, lens 5, LD pad 11, bottom pad 12, focusing lens positioning cavity 31, lens positioning groove 32, glue groove 33, optical channel 34, light source positioning groove 35, convex surface 41. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the utility model. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.
[0030] Embodiment 1: The specific structure of the utility model is as follows:
[0031] Please refer to the attached Figure 1-7 The utility model discloses a laser module without focusing, comprising a PCB substrate 1, a laser light source 2, a mold shell 3, a focusing lens 4 and a lens 5. The mold shell 3 is a cylindrical structure, which has two ends through to form a through cavity, and a lens positioning groove 32, a focusing lens positioning cavity 31, an optical channel 34 and a light source positioning groove 35 are sequentially arranged along the first port of the through cavity to the second port of the through cavity, and the lens positioning groove 32 and the light source positioning groove 35 are arranged at an angle; the lens positioning groove 32 is a first square groove, which is a rectangular groove, and the light source positioning groove 35 is a second square groove, which is also a rectangular groove. The area of the first square groove is greater than the area of the second square groove. The angle between the length direction of the first square groove and the length direction of the second square groove is 45 degrees. That is, the angle between the long side of the first square groove and the long side of the second square groove is 45 degrees. This angle structure can make the DOE pattern and the laser two angles intersect at a relative 45-degree angle, so that the DOE pattern can be evenly distributed horizontally and vertically and keep the width consistent, without the need for manual correction.
[0032] The light channel 34 is a first cylindrical cavity, the focusing lens positioning cavity 31 is a second cylindrical cavity, the diameter of the first cylindrical cavity is smaller than the diameter of the second cylindrical cavity, the first cylindrical cavity intersects with the center of the light source positioning groove 35, and the second cylindrical cavity intersects with the center of the lens positioning groove 32.
[0033] The two relatively long sides of the lens positioning groove 32 are symmetrically provided with glue fixing grooves 33. After the lens 5 is placed in the lens positioning groove 32, glue is applied to the glue fixing grooves 33. When the glue is cured, the lens 5 is fixed. Figure 2 As shown, the glue-fixing grooves 33 are all arc grooves, which are partial groove bodies of a full-circular groove.
[0034] The focusing lens 4 is placed in the focusing lens positioning cavity 31 and is fixed by the lens 5; the focusing lens 4 is a cylindrical structure, and both sides of it are set as circular grooves, one of which has a flat bottom surface and the other has a convex surface 41, the convex surface 41 faces the lens 5, the upper annular surface of the focusing lens 4 is flush with the lens positioning groove 32, the diameter of the focusing lens 4 is equal to the diameter of the focusing lens positioning cavity 31, and when the focusing lens 4 is placed in the focusing lens positioning cavity 31, it will not shake.
[0035] The light source module includes a laser light source 2 and a PCB substrate 1. The laser light source 2 is mounted on the PCB substrate 1. After the PCB substrate 1 and the mold shell 3 are fixed, the laser light source 2 is located in the light source positioning groove 35, and the light emission direction of the laser light source 2 is toward the focusing lens 4.
[0036] like Figure 5-6 As shown, the PCB substrate 1 is fixed to the PCB substrate 1 by glue. The first surface of the PCB substrate 1 is provided with an LD pad 11, and the second surface thereof is provided with a bottom pad 12. The LD pad 11 and the bottom pad 12 are both provided at two locations, and the length direction of any LD pad 11 is at an angle of 45 degrees with the length direction of any bottom pad 12.
[0037] Since the laser light source 2 is in a fixed direction, the optical channel 34 is of a fixed length, and the focusing lens 4 is fixedly installed, that is, the laser light source 2 is at the focal position of the focusing lens 4, no focusing is required. The entire laser module is a focus-free structure.
[0038] In summary, the laser module of the utility model can be directly processed in a patch mode, which significantly improves the processing efficiency and saves the processing cost compared with the existing plug-in form. The base PCB pad and the shell of the utility model are both angle-positioned, which eliminates the need for complex calibration jigs in the assembly, debugging, and calibration stages, avoids the problem of deviation caused by manual calibration, improves production efficiency, and reduces production losses and production costs.
[0039] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A focus-free laser module, characterized in that: include: A mold shell (3) having two ends connected to form a through cavity, wherein a lens positioning groove (32), a focusing lens positioning cavity (31), an optical channel (34) and a light source positioning groove (35) are sequentially arranged along the first end to the second end of the through cavity, wherein the lens positioning groove (32) and the light source positioning groove (35) are arranged at an angle; A lens (5) fixed in the lens positioning groove (32); A focusing lens (4) is placed in the focusing lens positioning cavity (31) and is tightly fixed by the lens (5); A light source module, comprising a laser light source (2) and a PCB substrate (1), wherein the laser light source (2) is mounted on the PCB substrate (1), and after the PCB substrate (1) and the mold shell (3) are fixed, the laser light source (2) is located in the light source positioning groove (35).
2. The focus-free laser module according to claim 1, characterized in that: The lens positioning groove (32) is a first square groove, the light source positioning groove (35) is a second square groove, and the angle between the length direction of the first square groove and the length direction of the second square groove is 45 degrees.
3. The focus-free laser module according to claim 1, characterized in that: Two relatively long sides of the lens positioning groove (32) are symmetrically provided with glue fixing grooves (33).
4. The focus-free laser module according to claim 1, characterized in that: The lens (5) is glued to the lens positioning groove (32).
5. The focus-free laser module according to claim 1, characterized in that: The focusing lens (4) is a cylindrical structure, and both sides thereof are provided with circular grooves, wherein the bottom surface of one circular groove is a plane, and the bottom surface of the other circular groove is a convex surface (41), and the convex surface (41) faces the lens (5).
6. The focus-free laser module according to claim 1, characterized in that: The optical channel (34) is a first cylindrical cavity, the focusing lens positioning cavity (31) is a second cylindrical cavity, the diameter of the first cylindrical cavity is smaller than the diameter of the second cylindrical cavity, the first cylindrical cavity intersects with the center of the light source positioning groove (35), and the second cylindrical cavity intersects with the center of the lens positioning groove (32).
7. The focus-free laser module according to claim 1, characterized in that: The PCB substrate (1) is glued to the PCB substrate (1).
8. The focus-free laser module according to claim 1, characterized in that: The first surface of the PCB substrate (1) is provided with an LD pad (11), and the second surface thereof is provided with a bottom pad (12); the length direction of any LD pad (11) forms an angle of 45 degrees with the length direction of any bottom pad (12).