Lens barrel assembly, laser emission module and single-point laser radar

Abstract

The utility model discloses a lens cone assembly, a laser emission module and a single-point laser radar, a plurality of diaphragms are arranged in a conical emission channel at intervals, and effective light spots can be avoided through inner holes of the diaphragms, so that the effective light spots can be emitted out of a lens cone smoothly, and the efficiency is improved. As the inner diameter of the former diaphragm of the two adjacent diaphragms in the light emitting direction is smaller than that of the latter diaphragm, stray light can be blocked layer by layer through the multiple diaphragms, the stray light is prevented from being emitted out of the lens cone, and the detection effect of the laser radar is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of radar equipment, and in particular to a barrel assembly, a laser emission module and a single-point laser radar. Background Art

[0002] Single Point LiDAR is an application device of laser ranging technology, which is mainly used to obtain the target distance information at a single point. Compared with multi-line or 3D single-point LiDAR, single-point LiDAR can only measure the distance of one point at a time and does not have the ability of two-dimensional or multi-dimensional scanning imaging. Its basic working principle is to transmit laser pulses, then receive the laser signal reflected from the target object, and calculate the distance of the target by measuring the time difference between transmission and reception. Single-point LiDAR has certain application value in some scenes that do not require large-area coverage or rapid scanning due to its simple structure and relatively low cost, such as simple obstacle avoidance systems, fixed-point ranging and other occasions. In practical applications, single-point LiDAR is often used for basic distance measurement in the fields of drones, robot navigation, terrain mapping, etc., or used in combination with other sensors to provide accurate distance data input for the system.

[0003] Most of the single-point radars currently used for ranging are composed of two parts: the transmitting part and the receiving part. Among them, the radar using EEL laser for the transmitting part is easily affected by stray light outside the effective light spot, which affects the ranging resolution and distance. The main reason is that the EEL emission angle is large - part of the laser that does not participate in the ranging will hit the side wall of the lens barrel. If this reflected laser hits a close-range target, it will cover the long-distance ranging signal of the main optical path, affecting the detection effect of the single-point laser radar. Utility Model Content

[0004] The purpose of this application is to provide a lens barrel assembly, a laser emission module and a single-point laser radar, which can prevent stray light from emitting from the lens barrel, thereby ensuring the detection effect of the laser radar.

[0005] The embodiments of the present application can be implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a lens barrel assembly, comprising a lens barrel and a plurality of apertures;

[0007] The lens barrel has a tapered emission channel, the inner diameter of which gradually increases along the light emitting direction, and the plurality of apertures are sequentially spaced apart in the emission channel;

[0008] Wherein, along the light emitting direction, the inner diameter of the first of two adjacent apertures is smaller than the inner diameter of the second aperture.

[0009] In the above embodiment, by arranging a plurality of apertures arranged at intervals in the conical emission channel, the inner hole of the aperture can avoid the effective light spot, so that the effective light spot can be smoothly emitted from the lens barrel. Since the inner diameter of the first aperture of two adjacent apertures in the light emitting direction is smaller than the inner diameter of the second aperture, the plurality of apertures can block stray light layer by layer, thereby preventing stray light from emitting from the lens barrel, thereby ensuring the detection effect of the laser radar.

[0010] In an optional embodiment, the inner diameter of the aperture on a side close to the light entrance end of the emission channel is smaller than the inner diameter of the aperture on a side close to the light exit end of the emission channel.

[0011] In the above-mentioned embodiment, by setting the inner hole of the aperture to be larger at one end and smaller at the other end, the light output end close to the emission channel with a smaller inner diameter can be adapted to the divergence angle of the laser emission, thereby blocking more stray light and reflecting the stray light to the light input end. The stray light is weakened or even absorbed and disappears after multiple reflections on the aperture and the inner wall of the emission channel, thereby avoiding affecting the detection effect.

[0012] In an optional embodiment, the inner hole of the aperture is a tapered hole, and the inner diameter of the aperture gradually decreases along the light emitting direction.

[0013] In the above embodiment, by setting the inner hole of the aperture to be a cone with a gradually decreasing inner diameter along the light emitting direction, stray light can be better reflected until it is absorbed in the emission channel, thereby effectively preventing the stray light from being emitted.

[0014] In an optional embodiment, the inner hole of the aperture is conical.

[0015] In the above implementation, setting the inner hole of the aperture to be conical can better adapt to the divergence angle of the laser emission, thereby better blocking the emission of stray light and ensuring the smooth passage of the effective light spot.

[0016] In an optional embodiment, an inclination angle α of an inner hole of the aperture relative to the light emitting direction is ≥30°.

[0017] The above implementation can make the stray light incident on the inner hole wall of the aperture be reflected more accurately toward the light input end, achieve a better extinction effect, and avoid the situation where the stray light is reflected toward the light output end due to too small an angle.

[0018] In an optional embodiment, a plurality of annular mounting grooves are provided on the inner wall of the emission channel, and each of the apertures is installed in one of the mounting grooves.

[0019] In the above embodiment, by providing a mounting groove for mounting an aperture of a corresponding size, it is easy to determine the mounting position of the aperture and at the same time improve the mounting reliability.

[0020] In an optional embodiment, the inner wall of the mounting groove includes a first annular surface and a second annular surface that are connected, the first annular surface is parallel to the light emitting direction, the second annular surface forms an angle with the light emitting direction, the outer peripheral surface of the aperture cooperates with the first annular surface, and a surface of the aperture close to the light incident end of the emission channel cooperates with the second annular surface.

[0021] In the above embodiment, the first annular surface is arranged parallel to the light emitting direction, while the second annular surface is arranged at an angle to the light emitting direction. This facilitates the manufacture of the lens barrel and the formation of the mounting groove and reduces the difficulty of the process. The first annular surface and the second annular surface respectively cooperate with the two sides of the aperture to ensure the installation accuracy and reliability of the aperture.

[0022] In an optional implementation, the second annular surface is perpendicular to the light emitting direction.

[0023] In the above implementation, since the second annular surface is perpendicular to the light emitting direction, it is convenient to form the mounting groove in the lens barrel, further reducing the process difficulty.

[0024] In an optional embodiment, the lens barrel is provided with a plurality of glue dispensing holes penetrating through the inner wall of the emission channel, and the glue dispensing holes correspond one-to-one to the aperture.

[0025] In the above implementation, dispensing glue is performed by providing a dispensing hole that penetrates the lens barrel, which is conducive to the glue firmly bonding the diaphragm and the lens barrel, and the dispensing operation is convenient.

[0026] In an optional embodiment, the dispensing hole is a waist-shaped hole, and the length direction is the same as the circumference of the launch channel.

[0027] In the above embodiment, by setting the length direction of the waist-shaped glue dispensing hole to be the same as the circumferential direction of the emission channel, the glue can penetrate into a larger area between the aperture and the inner wall of the emission channel, thereby making the aperture and the lens barrel more firmly bonded.

[0028] In an optional embodiment, the inner hole of the aperture is coaxial with the emission channel.

[0029] In the above implementation, the inner hole of the aperture is coaxial with the emission channel, which can better allow the effective light spot to pass through, thereby preventing the aperture from blocking part of the light of the effective light spot.

[0030] In the second aspect, an embodiment of the present application provides a laser emission module, comprising a laser, a collimating lens and a lens barrel assembly as described in any of the above-mentioned embodiments, wherein the laser extends into the light input end of the emission channel, the collimating lens is installed at the light output end of the emission channel, and the inner hole of the aperture is coaxial with the laser and the collimating lens.

[0031] In the above embodiment, by setting multiple apertures arranged at intervals in the conical emission channel, the inner hole of the aperture can avoid the effective light spot, so that the effective light spot can be smoothly emitted from the lens barrel. Since the inner diameter of the first aperture of two adjacent apertures in the light emission direction is smaller than the inner diameter of the second aperture, the multiple apertures can block stray light layer by layer, thereby preventing stray light from emitting from the lens barrel, thereby ensuring the detection effect of the laser radar. Moreover, since the inner hole of the aperture is coaxial with the laser and the collimating lens, the emission effect of the effective light spot can be guaranteed, thereby ensuring the accuracy of the radar.

[0032] In an optional embodiment, the lens barrel has a first mounting hole and a second mounting hole respectively connected to the light input end and the light output end of the emission channel, the first mounting hole and the second mounting hole are coaxial, the inner diameter of the first mounting hole is larger than the inner diameter of the light input end of the emission channel, and the laser is coaxially mounted in the first mounting hole. The inner diameter of the second mounting hole is larger than the inner diameter of the light output end of the emission channel, and the collimating lens is coaxially mounted in the second mounting hole.

[0033] In the above embodiment, a first mounting hole connected to the light input end of the emission channel and a second mounting hole connected to the light output end of the emission channel are arranged on the lens barrel. Since the first mounting hole is coaxial with the second mounting hole, after the laser is coaxially assembled in the first mounting hole and the collimating lens is coaxially assembled in the second mounting hole, the laser, the inner hole of the aperture and the collimating lens can be ensured to be coaxial.

[0034] In a third aspect, an embodiment of the present application discloses a single-point laser radar, including the laser emission module described in the above embodiment.

[0035] The above-mentioned embodiment, since it includes the laser emission module of the above-mentioned embodiment, also has corresponding beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a schematic diagram of a laser emission module according to an embodiment of the present application;

[0038] Figure 2 This is a cross-sectional view of the laser emission module according to an embodiment of the present application;

[0039] Figure 3 This is one of the schematic diagrams of the lens barrel of an embodiment of the present application;

[0040] Figure 4 This is the second schematic diagram of the lens barrel of the embodiment of the present application;

[0041] Figure 5 for Figure 2 A magnified view of part I;

[0042] Figure 6 It is a partial cross-sectional view of the lens barrel according to an embodiment of the present application.

[0043] Icons: 10-lens barrel; 11-emitting channel; 12-first mounting hole; 13-second mounting hole; 14-mounting groove; 141-first annular surface; 142-second annular surface; 15-glue dispensing hole; 20-aperture; 21-inner hole; 30-laser; 40-collimating lens; 50-circuit board. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0048] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The following is combined with Figures 1 to 6 , some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0051] refer to Figure 1 and Figure 2 An embodiment of the present application provides a laser emission module, which includes a laser 30, a collimating lens 40 and a lens barrel 10 assembly. The laser 30 is mainly used to emit laser, and the collimating lens 40 is used to collimate and focus the light emitted by the laser 30 to form parallel light and emit it out of the radar housing to detect a farther distance.

[0052] The lens barrel 10 assembly includes a lens barrel 10 and a plurality of apertures 20 ; the lens barrel 10 has a tapered emission channel 11 , a laser 30 extends into the light input end of the emission channel 11 , and a collimating lens 40 is installed at the light output end of the emission channel 11 .

[0053] The inner diameter of the emission channel 11 gradually increases along the light emitting direction, and a plurality of apertures 20 are sequentially arranged in the emission channel 11 at intervals; wherein, along the light emitting direction, the inner diameter of the first of two adjacent apertures 20 is smaller than the inner diameter of the second.

[0054] In this way, by arranging a plurality of apertures 20 arranged at intervals in the conical emission channel 11, the effective light spot can be avoided by the inner hole 21 of the aperture 20, so that the effective light spot can be smoothly emitted from the lens barrel 10. Since the inner diameter of the first aperture 20 of two adjacent apertures 20 in the light emitting direction is smaller than the inner diameter of the second aperture 20, the plurality of apertures 20 can block stray light layer by layer, thereby preventing stray light from emitting from the lens barrel 10, thereby ensuring the detection effect of the laser radar.

[0055] It should be noted that in order to eliminate stray light, the prior art uses a method of spraying matte paint on the inner wall of the conical emission channel 11 or roughening the inner wall of the emission channel 11. However, since the lens barrel 10 is generally a plastic injection molded product, the adhesion of the matte paint is poor and the reliability is low. The biggest difficulty in roughening the inner wall of the emission channel 11 is that the lens barrel 10 is difficult to demold. Moreover, if the roughness is too low, although it is relatively easy to demold, the matte ability is poor. If the roughness is high, it is easy to be torn during demolding.

[0056] However, the embodiment of the present application only requires the installation of multiple apertures 20 in the emission channel 11 . There is no high requirement for the roughness of the inner wall of the emission channel 11 . The production is simple and the reliability is high.

[0057] In this embodiment, the inner hole 21 of the aperture 20 is coaxial with the laser 30 and the collimating lens 40, so that the emission effect of the effective light spot can be guaranteed, thereby ensuring the accuracy of the radar.

[0058] The emission channel 11 may be conical, which can better adapt to the emission angle of the effective light spot, so as to avoid blocking part of the light of the effective light spot, and ensure that the effective light spot is completely and smoothly emitted after being focused by the collimating lens 40. The inner hole 21 of the aperture 20 is coaxial with the emission channel 11, which can better allow the effective light spot to pass through, and avoid the aperture 20 blocking part of the light of the effective light spot.

[0059] Combination Figure 3 and Figure 4 The lens barrel 10 has a first mounting hole 12 and a second mounting hole 13 respectively connected to the light input end and the light output end of the emission channel 11. The first mounting hole 12 and the second mounting hole 13 are coaxial. The inner diameter of the first mounting hole 12 is larger than the inner diameter of the light input end of the emission channel 11. The laser 30 is coaxially mounted in the first mounting hole 12 and can be fixed by glue. The inner diameter of the second mounting hole 13 is larger than the inner diameter of the light output end of the emission channel 11. The collimating lens 40 is coaxially mounted in the second mounting hole 13 and can be fixed by glue.

[0060] In this way, by providing a first mounting hole 12 connected to the light input end of the emitting channel 11 and a second mounting hole 13 connected to the light output end of the emitting channel 11 on the lens barrel 10, since the first mounting hole 12 is coaxial with the second mounting hole 13, the lens barrel 10 is directly injection molded to ensure the coaxiality of the first mounting hole 12 and the second mounting hole 13.

[0061] Therefore, after the laser 30 is coaxially assembled in the first mounting hole 12 and the collimating lens 40 is coaxially assembled in the second mounting hole 13, the laser 30, the inner hole 21 of the aperture 20 and the collimating lens 40 can be ensured to be coaxial to ensure the accurate detection effect of the radar.

[0062] In addition, the laser 30 can be assembled on the lens barrel 10 first and then welded to the circuit board 50, thereby improving the defect in the prior art that the laser 30 and the lens barrel 10 need to be welded to the circuit board 50 first and then assembled as a whole with the lens barrel 10, resulting in the overlap between the laser 30 and the lens barrel 10 and the tolerance between the circuit board 50 and the lens barrel 10, thereby affecting the coaxiality between the laser 30 and the collimating lens 40, and the coaxiality between the laser 30 and the collimating lens 40 can be ensured, thereby ensuring the accuracy of the radar. In addition, the requirements for the installation accuracy and adjustment range of the receiver for receiving the laser reflected from the external object are also lower.

[0063] Optionally, the inner diameter of the side of the aperture 20 close to the light input end of the emission channel 11 is smaller than the inner diameter of the side close to the light output end of the emission channel 11. In this way, the inner hole 21 of the aperture 20 is set to a structure with one end larger and the other end smaller, and the light output end close to the emission channel 11 with a smaller inner diameter can be adapted to the divergence angle of laser emission, thereby blocking more stray light, which is weakened or even absorbed and disappears after multiple reflections of the aperture 20 and the inner wall of the emission channel 11, avoiding affecting the detection effect.

[0064] More detailed, combined Figure 5 The inner hole 21 of the aperture 20 is a tapered hole, specifically a cone, and the inner diameter of the aperture 20 gradually decreases along the light emitting direction, which can better reflect the stray light until it is absorbed in the emission channel 11, effectively blocking the stray light from being emitted. Moreover, the inner hole 21 of the aperture 20 is set to a cone shape, which can better adapt to the divergence angle of the laser emission, thereby better blocking the stray light from being emitted and ensuring the smooth passage of the effective light spot.

[0065] Among them, the inclination angle α of the inner hole 21 of the aperture 20 relative to the light output direction is ≥30°, which can make the stray light incident on the wall of the inner hole 21 of the aperture 20 more accurately reflected toward the light input end, achieve better extinction effect, and avoid the situation where the stray light is reflected toward the light output end due to too small an angle.

[0066] In this embodiment, a plurality of annular mounting grooves 14 are provided on the inner wall of the emission channel 11, and each diaphragm 20 is installed in one mounting groove 14. Thus, by providing the mounting grooves 14 for the diaphragms 20 of corresponding sizes to be installed, it is convenient to determine the installation position of the diaphragm 20, which plays a positioning role and improves the installation reliability.

[0067] Specific, combined Figure 6The inner wall of the mounting groove 14 includes a first annular surface 141 and a second annular surface 142 connected to each other. The first annular surface 141 is parallel to the light emitting direction, and the second annular surface 142 is at an angle to the light emitting direction. The outer peripheral surface of the aperture 20 cooperates with the first annular surface 141, and the side of the aperture 20 close to the light incident end of the emission channel 11 cooperates with the second annular surface 142. This facilitates the production of the lens barrel 10 and the formation of the mounting groove 14. Specifically, the mounting groove 14 can be directly formed in the mold, which is conducive to demolding. In addition, the mounting groove 14 can also be made by machining, which is convenient for tool matching and reduces the process difficulty. The first annular surface 141 and the second annular surface 142 respectively cooperate with the two sides of the aperture 20 to ensure the installation accuracy and reliability of the aperture 20.

[0068] The second annular surface 142 may be at an obtuse angle to the first annular surface 141 , so that the second annular surface 142 is at a certain acute angle to the light emitting direction, as long as it is an angle that can be achieved by the mold or processing.

[0069] Of course, the second annular surface 142 can be perpendicular to the light emitting direction, which can facilitate the processing of the mounting groove 14 in the lens barrel 10, further reducing the process difficulty and processing cost. The tool only needs to be inserted into the lens barrel 10 and rotated a few times to form a mounting groove 14. The relative angle between the lens barrel 10 and the tool does not need to be changed, and cutting is convenient.

[0070] In order to realize the installation of the diaphragm 20 inside the lens barrel 10, the lens barrel 10 is provided with a plurality of glue dispensing holes 15 which penetrate the inner wall of the emission channel 11. The glue dispensing holes 15 correspond one to one with the diaphragm 20. In this way, glue dispensing can be performed by setting the glue dispensing holes 15 which penetrate the lens barrel 10, which is conducive to the glue firmly bonding the diaphragm 20 and the lens barrel 10, and the glue dispensing operation is convenient.

[0071] More specifically, the glue hole 15 is a waist-shaped hole, and the length direction is the same as the circumference direction of the emission channel 11. In this way, the glue can penetrate into more areas between the diaphragm 20 and the inner wall of the emission channel 11, so that the diaphragm 20 and the lens barrel 10 are more firmly bonded.

[0072] In addition, an embodiment of the present application discloses a single-point laser radar, which includes the laser emission module of the above embodiment, and therefore also has corresponding beneficial effects, which will not be repeated here.

[0073] In summary, the embodiments of the present application disclose a lens barrel 10 assembly, a laser emission module and a single-point laser radar. By arranging a plurality of apertures 20 arranged at intervals in a conical emission channel 11, the effective light spot can be avoided by the inner hole 21 of the aperture 20, so that the effective light spot can be smoothly emitted from the lens barrel 10. Since the inner diameter of the first aperture 20 of two adjacent apertures 20 in the light emitting direction is smaller than the inner diameter of the second aperture 20, the plurality of apertures 20 can block stray light layer by layer, thereby preventing stray light from emitting from the lens barrel 10, thereby ensuring the detection effect of the laser radar.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lens barrel assembly, characterized in that: It comprises a lens barrel (10) and a plurality of apertures (20); The lens barrel (10) has a tapered emission channel (11), the inner diameter of the emission channel (11) gradually increases along the light emission direction, and the plurality of apertures (20) are sequentially arranged at intervals in the emission channel (11); Wherein, along the light emitting direction, the inner diameter of the first of two adjacent apertures (20) is smaller than the inner diameter of the second aperture.

2. The lens barrel assembly according to claim 1, characterized in that: The inner diameter of the side of the aperture (20) close to the light entrance end of the emission channel (11) is smaller than the inner diameter of the side close to the light exit end of the emission channel (11).

3. The lens barrel assembly according to claim 2, characterized in that: The inner hole (21) of the diaphragm (20) is a tapered hole, and the inner diameter of the diaphragm (20) gradually decreases along the light emitting direction.

4. The lens barrel assembly according to claim 3, characterized in that: The inner hole (21) of the aperture (20) is in a conical shape.

5. The lens barrel assembly according to claim 3, characterized in that: The inner hole (21) of the aperture (20) has an inclination angle α of ≥30° relative to the light emitting direction.

6. The lens barrel assembly according to claim 1, characterized in that: A plurality of annular mounting grooves (14) are provided on the inner wall of the emission channel (11), and each of the apertures (20) is mounted in one of the mounting grooves (14).

7. The lens barrel assembly according to claim 6, characterized in that: The inner wall of the mounting groove (14) comprises a first annular surface (141) and a second annular surface (142) which are connected to each other; the first annular surface (141) is parallel to the light emitting direction; the second annular surface (142) forms an angle with the light emitting direction; the outer peripheral surface of the aperture (20) cooperates with the first annular surface (141); and a surface of the aperture (20) close to the light incident end of the emission channel (11) cooperates with the second annular surface (142).

8. The lens barrel assembly according to claim 7, characterized in that: The second annular surface (142) is perpendicular to the light emitting direction.

9. The lens barrel assembly according to claim 1, characterized in that: The lens barrel (10) is provided with a plurality of glue dispensing holes (15) penetrating the inner wall of the emission channel (11), and the glue dispensing holes (15) correspond one-to-one to the aperture (20).

10. The lens barrel assembly according to claim 9, characterized in that: The glue dispensing hole (15) is a waist-shaped hole, and the length direction is the same as the circumferential direction of the emission channel (11).

11. The lens barrel assembly according to claim 1, characterized in that: The inner hole (21) of the aperture (20) and the emission channel (11) are coaxial.

12. A laser emission module, characterized in that: The invention comprises a laser (30), a collimating lens (40) and a lens barrel assembly according to any one of claims 1 to 11, wherein the laser (30) extends into the light input end of the emission channel (11), the collimating lens (40) is installed at the light output end of the emission channel (11), and the inner hole (21) of the aperture (20) is coaxial with the laser (30) and the collimating lens (40).

13. The laser emission module according to claim 12, characterized in that: The lens barrel (10) comprises a first mounting hole (12) and a second mounting hole (13) which are respectively connected to the light input end and the light output end of the emission channel (11); the first mounting hole (12) and the second mounting hole (13) are coaxial; the inner diameter of the first mounting hole (12) is larger than the inner diameter of the light input end of the emission channel (11); the laser (30) is coaxially mounted in the first mounting hole (12); the inner diameter of the second mounting hole (13) is larger than the inner diameter of the light output end of the emission channel (11); the collimating lens (40) is coaxially mounted in the second mounting hole (13).

14. A single-point laser radar, characterized in that: Comprising the laser emission module described in claim 12 or 13.

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