CN219456491U - Laser transceiver module and laser radar - Google Patents
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Abstract
本申请涉及激光雷达技术领域,并提供了一种激光收发模块及激光雷达,其中激光收发模块包括外壳、激光发射单元和分束镜,激光发射单元和分束镜分别位于外壳的相对两侧,外壳内设置有第一光通道和消光腔室,第一光通道连接激光发射单元和分束镜,消光腔室位于第一光通道的旁侧,且消光腔室的两端分别为封闭端和开放端,开放端临近分束镜布置,且连通于第一光通道,封闭端临近激光发射单元布置,消光腔室远离所述第一光通道的一侧设置有开口,开口由供激光收发模块安装的底座的局部进行密封;其中激光雷达包括上述激光收发模块。本申请的激光收发模块及激光雷达,对杂散光的消除效果较好,有利于提升激光雷达的探测能力。
The application relates to the technical field of laser radar, and provides a laser transceiver module and a laser radar, wherein the laser transceiver module includes a housing, a laser emitting unit and a beam splitter, and the laser emitting unit and the beam splitter are respectively located on opposite sides of the housing, The housing is provided with a first optical channel and an extinction chamber, the first optical channel is connected to the laser emitting unit and the beam splitter, the extinction chamber is located on the side of the first optical channel, and the two ends of the extinction chamber are closed ends and Open end, the open end is arranged near the beam splitter and communicated with the first optical channel, the closed end is arranged near the laser emitting unit, and an opening is provided on the side of the extinction chamber away from the first optical channel, and the opening is provided by the laser transceiver module Part of the installed base is sealed; wherein the laser radar includes the above-mentioned laser transceiver module. The laser transceiver module and the laser radar of the present application have a good effect on eliminating stray light, which is beneficial to improving the detection capability of the laser radar.
Description
技术领域technical field
本申请属于激光雷达技术领域,更具体地说,是涉及一种激光收发模块及激光雷达。This application belongs to the technical field of laser radar, and more specifically relates to a laser transceiver module and laser radar.
背景技术Background technique
近年来随着激光雷达技术的日渐成熟,使得沿着路侧部署激光雷达以实现车路协同、智能网联成为了大势趋势。激光雷达最大的优点在于可以生成三维的位置信息,能够快速确定物体的位置、尺寸大小、外部形态等,同时获得数据并生成高精度的数字地图。In recent years, with the maturity of lidar technology, it has become a general trend to deploy lidar along the roadside to achieve vehicle-road coordination and intelligent network connection. The biggest advantage of lidar is that it can generate three-dimensional position information, quickly determine the position, size, and external shape of objects, and at the same time obtain data and generate high-precision digital maps.
激光雷达相较于摄像头等传感器,它的探测距离更远、测量精度更高,同时响应速度也更灵敏,不受环境光的影响,所以激光雷达的应用场景越来越多,应用范围越来越广。Compared with sensors such as cameras, lidar has a longer detection distance, higher measurement accuracy, and a more sensitive response speed, and is not affected by ambient light. Therefore, lidar has more and more application scenarios and a wider range of applications. wider.
杂散光是通过光学系统投射到像平面上不参与成像有害的光。杂散光是由非成像光线通过光学系统射向仪器镜筒的内壁表面,再由内壁表面反射后通过光学系统的出射光瞳射向像面形成。其次成像光束及非成像光束通过光学零件折射面时,有一部分光反射回到仪器内壁表面,或在光学零件的两个折射面间多次反射和折射产生杂散光。再者光学零件表面的划痕、麻点、抛光不够的部位,以及光学材料内部的条纹及杂质和光学零件的粗糙的非工作面的散射等原因也会引起杂散光。Stray light is harmful light that is projected onto the image plane through the optical system and does not participate in imaging. Stray light is formed by the non-imaging light passing through the optical system to the inner wall surface of the instrument barrel, and then reflected by the inner wall surface and then passing through the exit pupil of the optical system to the image plane. Secondly, when the imaging beam and the non-imaging beam pass through the refraction surface of the optical part, part of the light is reflected back to the inner wall surface of the instrument, or stray light is generated by multiple reflections and refractions between the two refraction surfaces of the optical part. In addition, scratches, pits, and insufficiently polished parts on the surface of optical parts, as well as striations and impurities inside optical materials, and scattering from rough non-working surfaces of optical parts can also cause stray light.
例如申请号为202080004045.X的中国专利公开了一种激光收发模块和激光雷达,包括:壳体、固定在壳体内的发射模组、分束模组以及接收模组,发射模组发出的出射光信号经分束模组后向外出射,并在探测区域内被目标物体反射后返回反射光信号,反射光信号由分束模组接收并偏转后,由接收模组接收,其中,发射模组与分束模组之间设置有消光结构,消光结构用于避免被分束模组反射的出射光信号射向接收模组,且消光结构设置于壳体上,消光结构包括呈角度设置的第一反射面和第二反射面;第一反射面的一端靠近发射模组,另一端与第二反射面相连;第二反射面的一端与第一反射面相连,另一端靠近分束模组,发射模组包括激光器和准直模块,激光器用于产生激光信号,准直模块用于对激光信号进行准直,准直模块包括快轴准直镜组和慢轴准直镜组,其中,准直模块的出射端前侧设置有第一发射光阑,快轴准直镜组与慢轴准直镜组之间设置有第二发射光阑。For example, the Chinese patent application number 202080004045.X discloses a laser transceiver module and a laser radar, including: a casing, a transmitting module fixed in the casing, a beam splitting module, and a receiving module. The emitted light signal goes out after passing through the beam splitting module, and returns to the reflected light signal after being reflected by the target object in the detection area. The reflected light signal is received and deflected by the beam splitting module, and then received by the receiving module. There is a light extinction structure between the group and the beam splitting module. The light extinction structure is used to prevent the outgoing light signal reflected by the beam splitting module from being directed to the receiving module, and the light extinction structure is arranged on the housing. The light extinction structure includes angled The first reflective surface and the second reflective surface; one end of the first reflective surface is close to the emission module, and the other end is connected to the second reflective surface; one end of the second reflective surface is connected to the first reflective surface, and the other end is close to the beam splitting module , the emission module includes a laser and a collimation module, the laser is used to generate a laser signal, the collimation module is used to collimate the laser signal, and the collimation module includes a fast-axis collimator mirror group and a slow-axis collimator mirror group, wherein, A first emission aperture is arranged on the front side of the output end of the collimation module, and a second emission aperture is arranged between the fast-axis collimation mirror group and the slow-axis collimation mirror group.
针对上述中的相关技术,发明人认为存在以下缺陷:For the related technologies mentioned above, the inventor believes that there are the following defects:
上述设计的消光结构由第一反射面和第二反射面所形成的三角凹陷结构,杂散光在消光结构中反射的次数和空间有限,对杂散光的消除效果不佳,从而影响激光雷达的探测能力,故而有待改进。The extinction structure designed above is a triangular concave structure formed by the first reflective surface and the second reflective surface. The number and space of stray light reflected in the extinction structure are limited, and the effect of eliminating stray light is not good, which affects the detection of laser radar. ability, so it needs to be improved.
实用新型内容Utility model content
本申请实施例的目的在于提供一种激光收发模块及激光雷达,以解决激光收发模块因对杂散光的消除效果不佳而存在探测能力较差的技术问题。The purpose of the embodiment of the present application is to provide a laser transceiver module and a laser radar to solve the technical problem that the laser transceiver module has poor detection ability due to poor elimination effect on stray light.
为实现上述目的,第一方面,本申请采用的技术方案是:In order to achieve the above object, the first aspect, the technical solution adopted by the application is:
提供一种激光收发模块,包括外壳、激光发射单元和分束镜,所述激光发射单元和所述分束镜分别位于所述外壳的相对两侧,所述外壳内设置有第一光通道和消光腔室,所述第一光通道连接所述激光发射单元和所述分束镜,所述消光腔室位于所述第一光通道的旁侧,且所述消光腔室的两端分别为封闭端和开放端,所述开放端临近所述分束镜布置,且连通于所述第一光通道,所述封闭端临近所述激光发射单元布置,所述消光腔室远离所述第一光通道的一侧设置有开口,所述开口由供所述激光收发模块安装的底座的局部进行密封。A laser transceiver module is provided, comprising a housing, a laser emitting unit and a beam splitter, the laser emitting unit and the beam splitter are respectively located on opposite sides of the housing, the housing is provided with a first optical channel and An extinction chamber, the first optical channel connects the laser emitting unit and the beam splitter, the extinction chamber is located on the side of the first optical channel, and the two ends of the extinction chamber are respectively A closed end and an open end, the open end is arranged adjacent to the beam splitter and communicated with the first optical channel, the closed end is arranged adjacent to the laser emitting unit, and the extinction chamber is far away from the first One side of the optical channel is provided with an opening, and the opening is sealed by a part of the base for installing the laser transceiver module.
通过上述技术方案,与常规技术相比,消光腔室的长度方向大致朝向激光发射单元的一侧布置,将消光腔室设计的更长且更深,从而杂散光在消光腔室中反射的次数更多,进一步有利于消除杂散光,减小了杂散光带来的信号干扰,有利于提升激光雷达的探测能力;开口可以通过供激光收发模块安装的底座的局部进行密封,从而可以有效解决结构受限制的问题,为消光腔室的制作降低难度和成本。Through the above technical solution, compared with the conventional technology, the length direction of the extinction chamber is generally arranged toward one side of the laser emitting unit, and the extinction chamber is designed to be longer and deeper, so that the number of stray light reflections in the extinction chamber is more More, it is further beneficial to eliminate stray light, reduce the signal interference caused by stray light, and help to improve the detection capability of lidar; the opening can be sealed through the part of the base for the laser transceiver module to be installed, which can effectively solve the problem of structural damage. The problem of limitation reduces the difficulty and cost for the production of the extinction chamber.
在本申请的一种可实现的技术方案中,所述消光腔室包括倾斜段和直线段,所述倾斜段包括所述开放端,所述直线段与所述第一光通道平行布置,所述倾斜段和所述直线段之间的夹角为钝角。In a feasible technical solution of the present application, the extinction chamber includes an inclined section and a straight section, the inclined section includes the open end, and the straight section is arranged in parallel with the first light channel, so The included angle between the inclined section and the straight section is an obtuse angle.
通过上述技术方案,上述设计的消光腔室,结构简单,加工制作更方便。Through the above technical solution, the above-designed extinction chamber has a simple structure and is more convenient to manufacture.
在本申请的一种可实现的技术方案中,还包括准直单元,所述准直单元安装于所述第一光通道中,所述准直单元位于所述分束镜和所述激光发射单元之间。In an achievable technical solution of the present application, a collimation unit is also included, the collimation unit is installed in the first optical channel, and the collimation unit is located between the beam splitter and the laser emitting between units.
通过上述技术方案,可以确保直线段的长度比较长,进而杂散光在消光腔室中反射的次数更多,进一步有利于消除杂散光。Through the above technical solution, it can be ensured that the length of the straight line is relatively long, so that the stray light is reflected more times in the light extinction chamber, which further facilitates the elimination of stray light.
在本申请的一种可实现的技术方案中,所述准直单元包括快轴准直透镜和慢轴准直透镜,所述快轴准直透镜和所述慢轴准直透镜之间设置有供光通过的第一消光结构。In an achievable technical solution of the present application, the collimation unit includes a fast-axis collimator lens and a slow-axis collimator lens, and a A first light-extinction structure through which light passes.
通过上述技术方案,激光光束在从快轴准直透镜入射至慢轴准直透镜中的过程中,激光光束在二者间来回反射也会产生杂散光,这类杂散光会在第一消光结构内多次反射且被吸收,最终转化为热量被消散,从而减少杂散光干扰信号。Through the above technical solution, when the laser beam is incident from the fast-axis collimator lens to the slow-axis collimator lens, stray light will also be generated when the laser beam is reflected back and forth between the two. It is reflected and absorbed multiple times, and finally converted into heat and dissipated, thereby reducing stray light interference signals.
在本申请的一种可实现的技术方案中,还包括接收单元和反射镜,所述接收单元安装于所述外壳临近所述激光发射单元的一侧,所述反射镜安装于所述外壳临近所述分束镜的一侧,所述外壳内还设置有与所述第一光通道平行间隔布置的第二光通道,所述第二光通道连接所述接收单元和所述反射镜。In an achievable technical solution of the present application, a receiving unit and a reflector are also included, the receiving unit is installed on the side of the casing adjacent to the laser emitting unit, and the reflector is installed on the side of the casing adjacent to the laser emitting unit. On one side of the beam splitter, a second optical channel arranged parallel to and spaced from the first optical channel is arranged in the housing, and the second optical channel connects the receiving unit and the reflector.
在本申请的一种可实现的技术方案中,所述第二光通道内临近所述接收单元的端部设置有第二消光结构。In a feasible technical solution of the present application, a second light extinction structure is provided at an end of the second optical channel adjacent to the receiving unit.
通过上述技术方案,第二消光结构可以让即将达到接收单元的杂散光,进一步削弱,有效避免信号被杂散光干扰的问题。Through the above technical solution, the second extinction structure can further weaken the stray light that is about to reach the receiving unit, effectively avoiding the problem that the signal is interfered by the stray light.
在本申请的一种可实现的技术方案中,还包括光阑,所述光阑安装于所述接收单元临近所述第二消光结构的一侧。In a feasible technical solution of the present application, an aperture is further included, and the aperture is installed on a side of the receiving unit adjacent to the second light extinction structure.
通过上述技术方案,光阑可以让即将达到接收单元的杂散光,进一步削弱,有效避免信号被杂散光干扰的问题。Through the above technical solution, the aperture can further weaken the stray light that is about to reach the receiving unit, effectively avoiding the problem that the signal is interfered by the stray light.
在本申请的一种可实现的技术方案中,所述外壳上固定有设于所述激光发射单元周围的至少一个第一金属件,所述激光发射单元包括发射电路驱动板和发射屏蔽罩,所述发射电路驱动板的露铜区域和/或所述发射屏蔽罩与所述第一金属件焊接固定。In an achievable technical solution of the present application, at least one first metal piece arranged around the laser emitting unit is fixed on the housing, and the laser emitting unit includes an emitting circuit driving board and an emitting shield, The exposed copper area of the transmitting circuit driving board and/or the transmitting shield is welded and fixed to the first metal part.
通过上述技术方案,与常规的胶水固定方式相比,上述连接结构更加牢固,使得激光发射单元可靠性更高,增加激光收发模块的鲁棒性。Through the above technical solution, compared with the conventional glue fixing method, the above connection structure is stronger, so that the reliability of the laser emitting unit is higher, and the robustness of the laser transceiver module is increased.
在本申请的一种可实现的技术方案中,所述外壳上固定有设于所述接收单元周围的至少一个第二金属件,所述接收单元包括接收电路驱动板和接收屏蔽罩,所述接收电路驱动板的露铜区域和/或所述接收屏蔽罩与所述第二金属件焊接固定。In a feasible technical solution of the present application, at least one second metal piece arranged around the receiving unit is fixed on the housing, the receiving unit includes a receiving circuit drive board and a receiving shield, the The exposed copper area of the receiving circuit driving board and/or the receiving shield is welded and fixed to the second metal part.
通过上述技术方案,与常规的胶水固定方式相比,上述连接结构更加牢固,使得接收单元可靠性更高,增加激光收发模块的鲁棒性。Through the above technical solution, compared with the conventional glue fixing method, the above connection structure is stronger, which makes the receiving unit more reliable and increases the robustness of the laser transceiver module.
为实现上述目的,第二方面,本申请采用的技术方案是:In order to achieve the above object, the second aspect, the technical solution adopted by the application is:
提供一种激光雷达,包括底座和上述的激光收发模块。Provided is a laser radar, including a base and the above-mentioned laser transceiver module.
通过上述技术方案,在上述激光收发模块具有上述诸多优势的基础上,激光雷达同样具有上述优势,即:将消光腔室设计的更长且更深,从而杂散光在消光腔室中反射的次数更多,进一步有利于消除杂散光,减小了杂散光带来的信号干扰,有利于提升激光雷达的探测能力。Through the above technical solution, on the basis of the above-mentioned advantages of the above-mentioned laser transceiver module, the laser radar also has the above-mentioned advantages, that is, the extinction chamber is designed to be longer and deeper, so that the number of reflections of stray light in the extinction chamber is more More, it is further beneficial to eliminate stray light, reduce the signal interference caused by stray light, and help improve the detection ability of lidar.
综上所述,本申请至少包括以下一种有益的技术效果:In summary, the present application includes at least one of the following beneficial technical effects:
消光腔室的长度方向大致朝向激光发射单元的一侧布置,将消光腔室设计的更长且更深,从而杂散光在消光腔室中反射的次数更多,进一步有利于消除杂散光,减小了杂散光带来的信号干扰,有利于提升激光雷达的探测能力。The length direction of the extinction chamber is roughly arranged towards one side of the laser emitting unit, and the design of the extinction chamber is longer and deeper, so that stray light is reflected more times in the extinction chamber, which is further conducive to eliminating stray light and reducing It eliminates the signal interference caused by stray light, which is conducive to improving the detection ability of lidar.
附图说明Description of drawings
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only for the present application For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.
图1为本申请实施例提供的激光收发模块的立体结构示意图。FIG. 1 is a schematic diagram of a three-dimensional structure of a laser transceiver module provided by an embodiment of the present application.
图2为本申请实施例提供的激光收发模块的平面剖视结构示意图。FIG. 2 is a schematic plan view of a cross-sectional structure of a laser transceiver module provided by an embodiment of the present application.
图3为本申请实施例提供的激光雷达的结构示意图。FIG. 3 is a schematic structural diagram of a lidar provided in an embodiment of the present application.
其中,图中各附图标记:Wherein, each reference sign in the figure:
100、激光收发模块;100. Laser transceiver module;
1、外壳;11、消光腔室;111、倾斜段;112、直线段;12、第二消光结构;113、开口;1. Shell; 11. Extinction chamber; 111. Inclined section; 112. Straight section; 12. Second extinction structure; 113. Opening;
2、激光发射单元;21、发射电路驱动板;22、发射屏蔽罩;2. Laser emitting unit; 21. Emitting circuit driver board; 22. Emitting shield;
3、分束镜;3. Beam splitter;
4、准直单元;41、快轴准直透镜;42、慢轴准直透镜;43、第一消光结构;4. Collimation unit; 41. Fast axis collimating lens; 42. Slow axis collimating lens; 43. First extinction structure;
5、接收单元;51、接收电路驱动板;52、接收屏蔽罩;5. Receiving unit; 51. Receiving circuit driver board; 52. Receiving shield;
6、反射镜;6. Mirror;
7、光阑;7. Aperture;
8、第一金属件;8. The first metal piece;
9、第二金属件;9. The second metal part;
200、底座;21、封板。200, base; 21, sealing plate.
具体实施方式Detailed ways
为了使本申请所要解决的技术问题、技术方案及有益效果更加清楚明白,以下结合附图及实施例,对本申请进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本申请,并不用于限定本申请。In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
需要说明的是,当元件被称为“固定于”或“设置于”另一个元件,它可以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件,它可以是直接连接到另一个元件或间接连接至该另一个元件上。It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
需要理解的是,术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying No device or element must have a particular orientation, be constructed, and operate in a particular orientation, and thus should not be construed as limiting the application.
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中,“多个”的含义是两个或两个以上,除非另有明确具体的限定。In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.
请一并参阅图1-图3,现对本申请实施例提供的激光收发模块100及激光雷达进行说明。Please refer to FIG. 1-FIG. 3 together. Now, the laser transceiver module 100 and the laser radar provided by the embodiment of the present application will be described.
本申请实施例提供一种激光收发模块100,请参阅图1和图2,包括外壳1、激光发射单元2和分束镜3,分束镜3在本实施例中为挖孔反射镜,也可以为不带孔的反射镜,激光发射单元2和分束镜3分别位于外壳1的相对两侧,外壳1内设置有第一光通道和消光腔室11,第一光通道连接激光发射单元2和分束镜3,消光腔室11位于第一光通道的旁侧,且消光腔室11的两端分别为封闭端和开放端,开放端临近分束镜3布置,且连通于第一光通道,封闭端临近激光发射单元2布置,消光腔室11远离所第一光通道的一侧设置有开口113,开口113由供激光收发模块安装的底座200的局部进行密封,上述底座200的局部于本实施例中具体为封板21,底座200详见图3。The embodiment of the present application provides a laser transceiver module 100, please refer to FIG. 1 and FIG. 2, which includes a housing 1, a laser emitting unit 2, and a beam splitter 3. It can be a reflector without holes. The laser emitting unit 2 and the beam splitter 3 are respectively located on opposite sides of the housing 1. The housing 1 is provided with a first optical channel and an extinction chamber 11. The first optical channel is connected to the laser emitting unit. 2 and the beam splitter 3, the extinction chamber 11 is located on the side of the first optical channel, and the two ends of the extinction chamber 11 are closed end and open end respectively, and the open end is arranged adjacent to the beam splitter 3 and communicated with the first The optical channel, the closed end is arranged near the laser emitting unit 2, and the side of the extinction chamber 11 away from the first optical channel is provided with an opening 113, and the opening 113 is sealed by a part of the base 200 for the laser transceiver module to be installed. The base 200 The part is specifically the sealing plate 21 in this embodiment, and the base 200 is shown in FIG. 3 for details.
本申请提供的激光收发模块100,与现有技术相比,具有以下可预期的有益技术效果:Compared with the prior art, the laser transceiver module 100 provided by this application has the following expected beneficial technical effects:
消光腔室11的长度方向大致朝向激光发射单元2的一侧布置,将消光腔室11设计的更长且更深,从而杂散光在消光腔室11中反射的次数更多,进一步有利于消除杂散光,减小了杂散光带来的信号干扰,有利于提升激光雷达的探测能力;开口11可以通过供激光收发模块安装的底座200的局部进行密封,从而可以有效解决结构受限制的问题,为消光腔室11的制作降低难度和成本。The length direction of the extinction chamber 11 is generally arranged towards one side of the laser emitting unit 2, and the extinction chamber 11 is designed to be longer and deeper, so that the number of stray light reflections in the extinction chamber 11 is more, which further facilitates the elimination of stray light. Astigmatism reduces the signal interference caused by stray light, which is conducive to improving the detection capability of the laser radar; the opening 11 can be sealed by a part of the base 200 for the laser transceiver module to be installed, thereby effectively solving the problem of limited structure. Fabrication of the extinction chamber 11 reduces difficulty and cost.
具体地,消光腔室11包括倾斜段111和直线段112,倾斜段111包括开放端,直线段112与第一光通道平行布置,倾斜段111和直线段112之间的夹角为钝角,上述设计的消光腔室11,结构简单,加工制作更方便。Specifically, the extinction chamber 11 includes an inclined section 111 and a straight section 112, the inclined section 111 includes an open end, the straight section 112 is arranged parallel to the first light channel, and the angle between the inclined section 111 and the straight section 112 is an obtuse angle, the above The designed extinction chamber 11 has a simple structure and is more convenient to manufacture.
激光收发模块100还包括准直单元4,准直单元4安装于第一光通道中,准直单元4位于分束镜3和激光发射单元2之间,从而可以确保直线段112的长度比较长,进而杂散光在消光腔室11中反射的次数更多,进一步有利于消除杂散光。The laser transceiver module 100 also includes a collimation unit 4, the collimation unit 4 is installed in the first optical channel, and the collimation unit 4 is located between the beam splitter 3 and the laser emitting unit 2, thereby ensuring that the length of the straight line section 112 is relatively long , and then the stray light is reflected more times in the extinction chamber 11, which is further beneficial to eliminate the stray light.
具体地,准直单元4包括快轴准直透镜41和慢轴准直透镜42,快轴准直透镜41和慢轴准直透镜42之间设置有供光通过的第一消光结构43,第一消光结构43由外壳1的内壁和两块间隔布置的挡板围合而成。Specifically, the collimation unit 4 includes a fast-axis collimator lens 41 and a slow-axis collimator lens 42, and a first extinction structure 43 for passing light is arranged between the fast-axis collimator lens 41 and the slow-axis collimator lens 42. A extinction structure 43 is enclosed by the inner wall of the housing 1 and two baffles arranged at intervals.
通过上述技术方案,激光光束在从快轴准直透镜41入射至慢轴准直透镜42中的过程中,激光光束在二者间来回反射也会产生杂散光,这类杂散光会在第一消光结构43内多次反射且被吸收,最终转化为热量被消散,从而减少杂散光干扰信号。Through the above-mentioned technical scheme, when the laser beam is incident from the fast-axis collimating lens 41 to the slow-axis collimating lens 42, stray light will also be generated when the laser beam is reflected back and forth between the two. The light extinction structure 43 is reflected and absorbed multiple times, and finally converted into heat and dissipated, thereby reducing stray light interference signals.
激光收发模块100还包括接收单元5和反射镜6,接收单元5安装于外壳1临近激光发射单元2的一侧,反射镜6安装于外壳1临近分束镜3的一侧,外壳1内还设置有与第一光通道平行间隔布置的第二光通道,第二光通道连接接收单元5和反射镜6。The laser transceiver module 100 also includes a receiving unit 5 and a reflector 6. The receiving unit 5 is installed on the side of the housing 1 adjacent to the laser emitting unit 2, and the reflector 6 is installed on the side of the housing 1 adjacent to the beam splitter 3. A second optical channel arranged parallel to and spaced from the first optical channel is provided, and the second optical channel connects the receiving unit 5 and the reflecting mirror 6 .
具体地,第二光通道内临近接收单元5的端部设置有第二消光结构12,第二消光结构12具体为螺纹孔,螺纹孔的内螺纹由于多次反射杂散光,第二消光结构12可以让即将达到接收单元5的杂散光,进一步削弱,有效避免信号被杂散光干扰的问题。Specifically, a second light extinction structure 12 is provided near the end of the receiving unit 5 in the second optical channel. The second light extinction structure 12 is specifically a threaded hole. The internal thread of the threaded hole reflects stray light multiple times, and the second light extinction structure 12 The stray light that is about to reach the receiving unit 5 can be further weakened, effectively avoiding the problem that the signal is interfered by the stray light.
激光收发模块100还包括光阑7,光阑7安装于接收单元5临近第二消光结构12的一侧,光阑7可以让即将达到接收单元5的杂散光,进一步削弱,有效避免信号被杂散光干扰的问题。The laser transceiver module 100 also includes an aperture 7. The aperture 7 is installed on the side of the receiving unit 5 adjacent to the second extinction structure 12. The aperture 7 can further weaken the stray light that is about to reach the receiving unit 5, effectively preventing the signal from being disturbed. The problem of astigmatism interference.
激光发射单元2发出的激光光束依次经过快轴准直透镜41、第一消光结构43、慢轴准直透镜42,然后经过分束镜3后向外出射,并在探测区域内被目标物体反射后返回反射光信号,反射光信号由分束镜3接收并偏转后,经过反射镜6反射后的反射光信号依次经过第二消光结构12和光阑7,并入射至接收单元5中。The laser beam emitted by the laser emitting unit 2 passes through the fast-axis collimating lens 41, the first extinction structure 43, and the slow-axis collimating lens 42 in sequence, and then passes through the beam splitter 3 and then emits outward, and is reflected by the target object in the detection area Afterwards, the reflected light signal is returned. After the reflected light signal is received and deflected by the beam splitter 3 , the reflected light signal reflected by the mirror 6 passes through the second light extinction structure 12 and the diaphragm 7 in turn, and enters the receiving unit 5 .
具体地,外壳1上固定有设于激光发射单元2周围的三个呈三角形布置的第一金属件8,激光发射单元2包括发射电路驱动板21和发射屏蔽罩22,发射电路驱动板21的露铜区域和/或发射屏蔽罩22与第一金属件8焊接固定。Specifically, the shell 1 is fixed with three first metal parts 8 arranged in a triangle around the laser emitting unit 2. The laser emitting unit 2 includes an emitting circuit driving board 21 and an emitting shielding cover 22. The emitting circuit driving board 21 The exposed copper area and/or the emission shield 22 are welded and fixed to the first metal part 8 .
与常规的胶水固定方式相比,上述连接结构更加牢固,使得激光发射单元2可靠性更高,增加激光收发模块100的鲁棒性。Compared with the conventional glue fixing method, the above connection structure is stronger, which makes the laser emitting unit 2 more reliable and increases the robustness of the laser transceiver module 100 .
具体地,外壳1上固定有设于接收单元5周围的三个呈三角形布置的第二金属件9,接收单元5包括接收电路驱动板51和接收屏蔽罩52,接收电路驱动板51的露铜区域和/或接收屏蔽罩52与第二金属件9焊接固定。Specifically, the housing 1 is fixed with three second metal parts 9 arranged in a triangle around the receiving unit 5. The receiving unit 5 includes a receiving circuit driving board 51 and a receiving shield 52. The exposed copper of the receiving circuit driving board 51 is The area and/or receiving shield 52 is welded and fixed to the second metal part 9 .
与常规的胶水固定方式相比,上述连接结构更加牢固,使得接收单元5可靠性更高,增加激光收发模块100的鲁棒性。Compared with the conventional glue fixing method, the above connection structure is stronger, which makes the receiving unit 5 more reliable and increases the robustness of the laser transceiver module 100 .
外壳1上设置有螺纹孔,第一金属件8和第二金属件9均为铜螺柱,铜螺柱的一段螺纹装配于螺纹孔内,铜材质的铜螺柱,更方便其与接收电路驱动板51的露铜区域和/或接收屏蔽罩52之间焊接固定,使激光发射单元2、接收单元5与外壳1形成一体结构,可靠性更高,导热能力更好,有利于快速散热;而且第一金属件8和第二金属件9可以快速且牢固的装配于外壳1上,螺纹装配的安装方式还方便转动拆卸更换第一金属件8和第二金属件9。The casing 1 is provided with threaded holes, the first metal part 8 and the second metal part 9 are copper studs, and a section of the copper studs is threaded in the threaded holes, and the copper studs made of copper are more convenient to connect with the receiving circuit The exposed copper area of the driving board 51 and/or the receiving shield 52 are welded and fixed, so that the laser emitting unit 2, the receiving unit 5 and the housing 1 form an integrated structure, with higher reliability and better thermal conductivity, which is conducive to rapid heat dissipation; Moreover, the first metal part 8 and the second metal part 9 can be quickly and firmly assembled on the housing 1 , and the installation method of screw assembly is also convenient to rotate, disassemble and replace the first metal part 8 and the second metal part 9 .
本申请实施例还提供一种激光雷达,请参阅图1和图3,包括底座200和如上述的激光收发模块100,其中激光收发模块100安装于底座200的内部,底座200上设置有密封开口113的封板21。The embodiment of the present application also provides a laser radar, please refer to FIG. 1 and FIG. 3 , including a base 200 and the above-mentioned laser transceiver module 100, wherein the laser transceiver module 100 is installed inside the base 200, and the base 200 is provided with a sealed opening 113 of the sealing plate 21.
通过上述技术方案,在上述激光收发模块100具有上述诸多优势的基础上,激光雷达同样具有上述优势,即:将消光腔室11设计的更长且更深,从而杂散光在消光腔室11中反射的次数更多,进一步有利于消除杂散光,减小了杂散光带来的信号干扰,有利于提升激光雷达的探测能力。Through the above technical solution, on the basis of the above-mentioned many advantages of the above-mentioned laser transceiver module 100, the laser radar also has the above-mentioned advantages, that is, the extinction chamber 11 is designed to be longer and deeper, so that stray light is reflected in the extinction chamber 11 More times, it is further beneficial to eliminate stray light, reduce the signal interference caused by stray light, and help improve the detection capability of lidar.
以上所述仅为本申请的较佳实施例而已,并不用以限制本申请,凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本申请的保护范围之内。The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the protection of the application. within range.
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