Integrated line laser transceiving module

Abstract

The utility model discloses an integrated line laser transceiving module, which comprises a circuit board and an optical transceiving assembly, and is characterized in that the optical transceiving assembly comprises a transmitting lens assembly, a receiving lens assembly and an expansion lens; the transmitting lens assembly and the receiving lens assembly are integrally formed on the circuit board through an in-film forming process; the expansion lens is arranged at the front end of the emission lens assembly. According to the utility model, the linear laser optical lens is adopted, the excitation emission lens and the laser receiving lens are formed around the laser emitter and the laser receiving chip on the circuit board through an in-mold forming process, and the expansion lens is arranged, so that the integrated optical transceiver module is formed; the defects caused by frequent debugging and installation of a plurality of elements can be avoided, so that the debugging cost, the installation cost and the labor cost are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser radar, and more specifically, to an integrated line laser transceiver module. Background Art

[0002] In the field of linear laser radar, line laser is used for ranging, obstacle avoidance, and cruise mapping, and is particularly widely used. Low cost and reliability have always been the demands for the promotion and application of linear laser radar.

[0003] The straight-line laser radars currently on the market generally use one or more linear laser emitting modules to emit lasers and one or more lens modules to receive lasers. These laser emitting modules and laser receiving modules are installed on the bracket through assembly and debugging. Since both the laser emitting module and the laser lens module are small and complex components, the material cost and process cost are particularly high. In addition, these components are already modules assembled from multiple parts. When they are assembled and installed on the bracket to form a laser radar, it is necessary to assemble parts multiple times, resulting in multiple processes, low efficiency, and low reliability.

[0004] How to design a line laser transceiver module with simple manufacturing process, high precision requirements and flexible design is a problem to be solved. Utility Model Content

[0005] Based on this, it is necessary to provide an integrated line laser transceiver module to address the existing problems.

[0006] The embodiment of the present application provides an integrated line laser transceiver module, characterized in that it includes a circuit board and an optical transceiver assembly, wherein the optical transceiver assembly includes a transmitting lens assembly, a receiving lens assembly and an expansion lens;

[0007] The transmitting lens assembly and the receiving lens assembly are formed on the circuit board by an in-mold forming process;

[0008] The expansion lens is arranged at the front end of the emitting lens assembly.

[0009] Preferably, the circuit board is a PCBA circuit board.

[0010] Preferably, the PCBA circuit board includes a laser transmitter and a laser receiving chip.

[0011] Preferably, the laser transmitter and the laser receiving chip are fixed on the PCBA circuit board via COB.

[0012] Preferably, the transmitting lens assembly is arranged around the laser emitter and fits tightly therewith.

[0013] Preferably, the receiving lens assembly is arranged around the laser receiving chip and fits tightly therewith.

[0014] Preferably, the laser emitter emits laser light, which is collimated by the emission lens and then shaped into a line laser by the expansion lens.

[0015] Preferably, the transmitting lens assembly and the receiving lens assembly are arranged vertically.

[0016] Preferably, the receiving lens assembly comprises one or more receiving lenses.

[0017] Preferably, the plurality of receiving lenses are arranged horizontally, and the optical axes of the plurality of receiving lenses are arranged at angles to each other.

[0018] Compared with the prior art, the integrated line laser transceiver module of the utility model first emits laser through the laser transmitter, and the light beam is collimated by the laser emission lens assembly, and then passes through the expansion lens to form a straight line laser, and then emitted to the target object and reflected back, and is received by the laser receiving lens assembly and focused on the receiving chip, and finally the laser signal processing circuit processes the electrical signal into a digital signal output. The utility model adopts an optical lens of a straight line laser, and the excitation lens and the laser receiving lens are molded around the laser transmitter and the laser receiving chip on the circuit board through the in-mold molding process, thereby forming an integrated optical transceiver module, which can avoid the disadvantages of frequent debugging and installation of multiple components, thereby greatly reducing the debugging cost, installation cost and labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] A more complete understanding of exemplary embodiments of the present invention may be obtained by reference to the following drawings.

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0021] Figure 1 This is a schematic diagram of the structure of an integrated line laser transceiver module provided according to the first embodiment of the present application.

[0022] Figure 2 It is a cross-sectional view of the integrated line laser transceiver module provided according to the first embodiment of the present application.

[0023] Reference numerals

[0024] 1-circuit board, 2-transmitting lens assembly, 3-receiving lens assembly, 4-expansion lens 11-laser transmitter, 12-laser receiving chip, 21-transmitting lens, 31-receiving lens. DETAILED DESCRIPTION

[0025] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 the internal communication of 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.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Embodiment 1

[0030] The integrated line laser transceiver module provided by the utility model is described below with reference to the accompanying drawings.

[0031] Reference Figure 1 and Figure 2 The integrated line laser transceiver module includes a circuit board 1, a laser emitting lens assembly 2, a laser receiving lens assembly 3 and an expansion lens 4.

[0032] In this embodiment, the circuit board 1 is a laser transceiver integrated PCBA, which includes a laser transmitter 11 and a laser receiving chip 12. Among them, the PCBA is responsible for the photoelectric conversion processing of the laser signal. In actual use, the laser emits a laser signal from the laser transmitter 11, which is collimated and shaped by the laser emission lens 21 on the integrated module, and then incident on the expansion lens 4 (the expansion lens is a special reflector that uses a reflection wall to reflect the waves, thereby realizing the control and regulation of the waves. When the wave encounters the reflection wall, according to the nature of the wave, the wave will be reflected and propagated in the direction where the incident angle is equal to the reflection angle. In the expansion lens, due to the existence of the reflection wall, the wave will be emitted by the reflection wall multiple times and form a series of parallel waves), the expansion lens 4 converts the light beam into a straight line laser, which is then emitted to the target object, and then reflected back by the target object and focused on the laser receiving chip 12 by the laser receiving lens 31. The signal processing circuit board then converts the received laser signal into a distance signal and outputs it to the outside.

[0033] In this embodiment, the expansion lens 4 includes a wave mirror, a cylindrical lens, a cylindrical microlens array, and a DOE (beam expander). The function of the expansion lens 4 is to expand the collimated parallel light to obtain a line laser.

[0034] Among them, the transmitting lens assembly 2 squeezes the resin material into the laser transmitter 12 of the circuit board 1 through the in-mold forming (molding or injection molding) process, and the receiving lens assembly 3 squeezes the resin material into the laser receiving chip 13 of the circuit board 1 through the in-mold forming process, so that the lens and its surrounding structure tightly wrap the laser transmitter and the laser receiving chip, and the combined part is fully enclosed, with no gap inside, and fits tightly. Such a setting allows the transmitting lens assembly 2 and the receiving lens assembly 3 to fit tightly with the circuit board 1, and the manufacturing process is simple, and the cumbersome debugging and installation steps can be eliminated, which greatly improves stability and reduces costs.

[0035] Among them, the emitting lens assembly 2 includes one or more laser emitting lenses 21, and the expansion lens 4 is installed at the front end of the emitting lens assembly 2 to ensure that the emitted light beam is shaped into a straight line laser; specifically, the edge of the expansion lens 4 fits tightly with the emitting lens 21, and there is a gap between the middle light-transmitting part and the emitting lens 21.

[0036] Specifically, the transmitting lens assembly 2 and the receiving lens assembly 3 are arranged in an up-and-down structure. The receiving lens assembly 3 includes one or more receiving lenses 31. Figure 1 The multiple receiving lenses are formed into one body, and there is an angle between the optical axes of the multiple receiving lenses. The interaction of the multiple receiving lenses can receive the laser reflected light within a larger angle range. In a preferred embodiment, the multiple receiving lenses 31 can also be independently arranged units.

[0037] The laser transmitter 11 and the laser receiving chip 12 are fixed on the PCBA circuit board through COB; specifically, COB (Chip-on-Board), also known as chip direct mounting technology, refers to the process of directly pasting the bare chip on the printed circuit board, then performing wire bonding, and then encapsulating the chip and wires with organic glue for protection. Compared with conventional processes, this process has high packaging density and simple procedures.

[0038] Compared with the prior art, the integrated line laser transceiver module of the utility model first emits laser through the laser transmitter, and the light beam passes through the laser emission lens assembly for collimation, and then passes through the expansion lens to form a straight line laser, and then emits to the target object and reflects back, and is received by the laser receiving lens assembly and focused onto the receiving chip, and finally the laser signal processing circuit processes the electrical signal into a digital signal output. The utility model adopts an optical lens of a straight line laser, and molds the excitation lens and the laser receiving lens around the laser transmitter and the laser receiving chip on the circuit board through the in-mold injection molding technology, thereby forming an integrated optical transceiver module, which can avoid the disadvantages of frequent debugging and installation of multiple components, thereby greatly reducing the debugging cost, installation cost and labor cost.

[0039] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0040] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An integrated line laser transceiver module, characterized in that: It includes a circuit board and an optical transceiver assembly, wherein the optical transceiver assembly includes a transmitting lens assembly, a receiving lens assembly and an expansion lens; The transmitting lens assembly and the receiving lens assembly are formed on the circuit board by an in-mold forming process; The expansion lens is arranged at the front end of the emitting lens assembly.

2. The integrated line laser transceiver module according to claim 1, characterized in that: The circuit board is a PCBA circuit board.

3. The integrated line laser transceiver module according to claim 2, characterized in that: The PCBA circuit board includes a laser transmitter and a laser receiving chip.

4. The integrated line laser transceiver module according to claim 3, characterized in that: The laser transmitter and the laser receiving chip are fixed on the PCBA circuit board through COB.

5. The integrated line laser transceiver module according to claim 3, characterized in that: The transmitting lens assembly is arranged around the laser transmitter and is closely fitted thereto.

6. The integrated line laser transceiver module according to claim 3, characterized in that: The receiving lens assembly is arranged around the laser receiving chip and is closely attached to the laser receiving chip.

7. The integrated line laser transceiver module according to claim 3, characterized in that: The laser emitter emits laser light, which is collimated by the emission lens assembly and then shaped into a line laser by the expansion lens.

8. The integrated line laser transceiver module according to claim 1, characterized in that: The transmitting lens assembly and the receiving lens assembly are arranged vertically.

9. The integrated line laser transceiver module according to claim 1, characterized in that: The receiving lens assembly includes one or more receiving lenses.

10. The integrated line laser transceiver module according to claim 9, characterized in that: The multiple receiving lenses are arranged horizontally, and the optical axes of the multiple receiving lenses are arranged at angles to each other.

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