A laser tube module, a manufacturing method thereof and a ranging device

Abstract

The application relates to the technical field of laser ranging, and particularly discloses a laser tube module, a manufacturing method thereof and a ranging device. The manufacturing method of the laser tube module comprises the following steps: providing a mold assembly, a laser tube body with a first port and a second port, and raw material for forming an optical lens; the laser tube body has an optical path channel with a positioning portion formed on the inner wall and passing through the first port and the second port; the mold assembly comprises a first mold with a first mold head and a second mold with a second mold head; the raw material is injected into the laser tube body; one of the first mold and the second mold is arranged at the first port, and the other is arranged at the second port, so that the first mold head and the second mold head are both directed towards the optical path channel; at least one of the first mold, the second mold and the laser tube body is moved along the direction of the optical path channel, so that the raw material is formed on the positioning portion, and the optical lens fixedly connected with the positioning portion is obtained. The manufacturing method has the characteristics of simple process and high reliability of the obtained laser tube module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser ranging, in particular to a laser tube module, a manufacturing method thereof and a ranging device. BACKGROUND

[0002] The manufacturing of the existing laser radar is generally obtained by assembling each component part of a laser tube, optical devices (a collimating mirror and a semiconductor laser emitter), a sleeve, a circuit board, etc. Specifically, a laser tube module is assembled first, and then the laser tube module is assembled with other component parts into a laser radar. Among them, the laser tube module is generally manufactured according to the following method: first, the collimating mirror (including at least one of a collimating lens and a wedge prism) is pushed into the laser tube by an external pushing device; second, the collimating mirror is fixed in the laser tube by a dispensing method; third, the semiconductor laser is aligned and focused with the collimating mirror; and finally, the semiconductor laser aligned and focused is fixed with the sleeve.

[0003] However, the manufacturing method of the existing laser tube module has defects such as complex assembly process, low installation precision, low reliability of the laser tube module, and large measurement error of the laser radar, which are specifically manifested as follows:

[0004] (1) The collimating mirror is pushed into the laser tube by an external pushing device, which cannot guarantee that the collimating mirror moves in parallel when moving in the laser tube, i.e., the collimating screen of the collimating mirror cannot be completely perpendicular to the laser tube, which will cause an error, and finally the laser emitted by the semiconductor laser will not be parallel to the exit of the laser tube after passing through the collimating mirror, which will eventually cause the measurement of the laser radar product to have an error.

[0005] (2) Since the pushing device pushes the collimating mirror into the laser tube from one side of the collimating mirror, and the laser tube is generally not transparent, the collimating mirror cannot be completely attached to the surface of the external pushing device during the pushing process due to factors such as vibration, so that the final stopping position of the collimating mirror has an error from the preset position, thereby affecting the alignment and focusing effect of the semiconductor laser and the collimating mirror, and affecting the accuracy and reliability of the subsequent dispensing fixation.

[0006] (3) The collimating mirror is fixed with the laser tube by a dispensing method, and during the gluing and solidification process, the position and inclination of the collimating mirror will also deviate, and the position and inclination of the collimating mirror cannot be controlled.

[0007] In addition, the melting point of the material used for dispensing will not be too high, and the laser tube module will generate heat during use, which will cause a closed high-temperature interval between the semiconductor laser and the collimating mirror, and the dispensing material will be heated and softened or even reach the melting point value and flow, which will eventually cause the position and inclination of the collimating mirror to deviate or even fail. SUMMARY

[0008] One of the purposes of the embodiments of the present application is to provide a manufacturing method of a laser tube module, aiming at solving the problems of existing laser tube module, such as complex assembly, low installation precision, low reliability of laser tube module, and large measurement error of laser radar.

[0009] To achieve the above-mentioned purposes, the technical solutions adopted by the embodiments of the present application are as follows:

[0010] A manufacturing method of a laser tube module, comprising the following steps:

[0011] providing a laser tube body, a mold assembly, and a raw material for forming an optical lens;

[0012] The laser tube body has a first port, a second port, and an optical path channel communicating the first port and the second port, and the inner wall of the optical path channel is formed with a positioning portion; the mold assembly comprises a first mold and a second mold, the first mold has a first mold head, and the second mold has a second mold head;

[0013] injecting the raw material into the laser tube body;

[0014] placing one of the first mold and the second mold at the first port and the other at the second port, and making the first mold head and the second mold head both face the optical path channel;

[0015] moving at least one of the first mold, the second mold, and the laser tube body along the direction of the optical path channel, so that the raw material is formed in the positioning portion to obtain an optical lens; the optical lens is fixedly connected with the positioning portion.

[0016] In a possible implementation, the optical lens is die-cast or cast; the formed optical lens has a first mirror surface and a second mirror surface; the first mold head has a first surface matched with the first mirror surface; and the second mold head has a second surface matched with the second mirror surface.

[0017] In a possible implementation, the optical lens is a wedge-shaped prism and a collimating lens formed integrally, one of the first mirror surface and the second mirror surface is an arc surface, and the other is a plane; one of the first surface and the second surface is an arc surface, and the other is a plane.

[0018] Alternatively, the optical lens is a collimating lens, one of the first mirror surface and the second mirror surface is an arc surface, and the other is a plane; one of the first surface and the second surface is an arc surface, and the other is a plane.

[0019] Or, the optical lens is a wedge prism, the first mirror surface and the second mirror surface are both planes, and the first mirror surface and the second mirror surface are arranged at an angle; the first surface and the second surface are both planes, and the first surface and the second surface are arranged at an angle.

[0020] In a possible implementation, the positioning portion has a limiting surface facing the direction of the first port, and the end portion of the second die has a fourth surface matched with the limiting surface, and the outer edge of the second surface is connected with the fourth surface.

[0021] Or, the positioning portion has a limiting surface facing the direction of the first port, and the end portion of the second die has a fourth surface matched with the limiting surface, and the outer edge of the second surface is connected with the fourth surface.

[0022] In a possible implementation, the positioning portion has a positioning groove, and the groove opening of the positioning groove faces the central axis of the optical path channel.

[0023] Or, the positioning portion has a positioning boss arranged on the inner wall of the optical channel, and the positioning boss is convexly arranged towards the central axis of the optical path channel.

[0024] In a possible implementation, the positioning portion is provided with a through hole penetrating the laser tube body.

[0025] In a possible implementation, the method further comprises a cooling process and a step of separating the die assembly from the laser tube body.

[0026] And / or, the method further comprises a step of placing a laser in the optical path channel, moving the laser and / or the laser tube body to determine the optimal focusing distance of the laser and the optical lens, and fixing the laser in the optical path channel.

[0027] Compared with the prior art, the manufacturing method of the laser tube module provided by the embodiment of the present application directly forms the optical lens by positioning the raw material for forming the optical lens in the positioning portion of the laser tube body, and the obtained optical lens is fixedly connected with the positioning portion, so that the installation position of the optical lens no longer needs to be repeatedly determined, and the dispensing process is omitted. The problems of complex assembly process, low installation precision, low reliability of the laser tube module, and large measurement error of the laser radar are solved, the manufacturing process of the laser tube module is effectively simplified, time and labor are saved, the optical lens and the laser tube body are relatively fixed, the collimation effect is good, and the obtained laser tube module structure has high reliability.

[0028] The second purpose of the embodiment of the present application is to provide a laser tube module, and the specific technical solutions adopted are as follows:

[0029] A laser tube module comprises:

[0030] A laser tube body having a first port, a second port and an optical path channel communicated between the first port and the second port, the optical path channel being formed with a positioning portion;

[0031] An optical lens having a first mirror surface and a second mirror surface, the optical lens being formed and fixed to the positioning portion by a raw material, and the first mirror surface being directed to the first port and the second mirror surface being directed to the second port;

[0032] A laser fixed in the optical path channel for emitting laser to the optical lens.

[0033] In a possible implementation, the optical lens is a wedge-shaped prism and a collimating lens formed integrally, or the optical lens is a collimating lens, or the optical lens is a wedge-shaped prism;

[0034] And / or, the laser tube module is manufactured according to the manufacturing method of the laser tube module.

[0035] Compared with the prior art, the laser tube module provided by the embodiment of the present application has high reliability because the optical lens is formed and fixed to the positioning portion in the optical path channel by a raw material for forming the optical lens, the fixing of the optical lens and the laser tube body is relatively firm, and the collimation effect is good.

[0036] The third object of the embodiment of the present application is to provide a ranging device, and the specific technical scheme adopted is as follows:

[0037] A ranging device, comprising the laser tube module according to any one of the above.

[0038] Compared with the prior art, the ranging device provided by the embodiment of the present application has high reliability because the laser tube module is obtained by forming and fixing an optical lens to a positioning portion in an optical path channel of a laser tube body by a raw material for forming the optical lens, the fixing of the optical lens and the laser tube body is relatively firm, the collimation effect is good, and the structure of the laser tube module has high reliability, so that the ranging device is less likely to have errors during use, thereby effectively improving the measurement accuracy of the ranging device. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0040] Figure 1 This is a schematic diagram of the manufacturing method of the laser tube module provided in an embodiment of the present invention;

[0041] Figure 2 This is a cross-sectional schematic diagram of the laser tube provided in an embodiment of the present invention;

[0042] Figure 3 A cross-sectional schematic diagram of a mold assembly provided in an embodiment of the present invention;

[0043] Figure 4 This is a partial cross-sectional view of a laser tube module provided in an embodiment of the present invention;

[0044] Figure 5 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 1 of the present invention;

[0045] Figure 6 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 1 of the present invention;

[0046] Figure 7 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 2 of the present invention;

[0047] Figure 8 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 2 of the present invention;

[0048] Figure 9 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 3 of the present invention;

[0049] Figure 10 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 3 of the present invention;

[0050] Figure 11 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 4 of the present invention;

[0051] Figure 12 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 4 of the present invention;

[0052] Figure 13 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 5 of the present invention;

[0053] Figure 14 This is a schematic flowchart of the manufacturing method of the laser tube module provided in Embodiment 5 of the present invention.

[0054] Figure label:

[0055] 10. Laser tube module;

[0056] 11, laser tube body; 1101, first port; 1102, second port; 1103, light path channel; 111, positioning part; 1111, limiting surface; 1112, connecting surface; 1113, positioning groove; 1114, through hole;

[0057] 12, optical lens; 121, first mirror surface; 122, second mirror surface; 123, circumferential side surface; 124, clamping part;

[0058] 13, laser;

[0059] 100, raw material;

[0060] 20, mold assembly;

[0061] 21, first mold; 211, first mold head; 2111, first surface; 2112, third surface;

[0062] 22, second mold; 221, second mold head; 2211, second surface. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0064] The manufacturing method of the laser tube module 10 provided by the embodiments of the present application and the components involved in the manufacturing method, such as the laser tube body 11, the mold assembly 20 and the raw material for forming the lens, are shown in the drawings. Figures 1 to 3 The manufacturing method of the laser tube module 10 provided by the embodiments of the present application and the components involved in the manufacturing method, such as the laser tube body 11, the mold assembly 20 and the raw material for forming the lens, are shown in the drawings.

[0065] Please refer to Figure 1 、 Figure 2 and Figure 3 and Figure 4 The manufacturing method of the laser tube module 10 provided by the embodiments of the present application, specifically includes the following steps:

[0066] Step S01, providing a laser tube body 11, a mold assembly 20 and a raw material for forming a lens.

[0067] The laser tube body 11 has a first port 1101, a second port 1102 and a light path channel 1103, the light path channel 1103 communicates the first port 1101 and the second port 1102, and the inner wall of the light path channel 1103 forms a positioning part 111; the mold assembly 20 includes a first mold 21 and a second mold 22, the first mold 21 has a first mold head 211, and the second mold 22 has a second mold head 221.

[0068] Step S02, injecting the raw material into the laser tube body 11.

[0069] Step S03, placing one of the first mold 21 and the second mold 22 at the first port 1101 and the other at the second port 1102, and making the first die head 211 and the second die head 221 both face the raw material.

[0070] Step S04, moving at least one of the first mold 21, the second mold 22 and the laser tube body 11 along the direction of the light path channel 1103, so that the raw material is formed in the positioning portion 111, and an optical lens 12 is obtained; the optical lens 12 is fixedly connected with the positioning portion 111.

[0071] It should be noted that in the present embodiment, the steps S01, S02, S03 and S04 do not serve as the order of manufacturing the laser tube mold set 10, for example, in steps S02 and S03, the first mold 21 can be placed at the second port 1102 first, and the first die head 211 is made to face the light path channel 1103, then the raw material is injected into the laser tube body 11 from the first port 1101, and then the second mold 22 is placed at the first port 1101 and the second die head 221 is made to face the light path channel 1103; or, the first mold 21 can be placed at the first port 1101 first, and the first die head 211 is made to face the light path channel 1103, then the raw material is injected into the laser tube body 11 from the second port 1102, and then the second mold 22 is placed at the second port 1102 and the second die head 221 is made to face the light path channel 1103; or, the raw material can be injected into the laser tube body 11 from the first port 1101 or the second port 1102 first, then one of the first mold 21 and the second mold 22 is placed at the first port 1101 and the other is placed at the second port 1102, and the first die head 211 and the second die head 221 are made to face the light path channel 1103; or, one of the first mold 21 and the second mold 22 can be placed at the first port 1101 and the other at the second port 1102 first, and the first die head 211 and the second die head 221 are made to face the light path channel 1103, and then the first mold 21 and the second mold 22 are moved to the positioning portion 111 respectively, and then the raw material is injected into the laser tube body 11, etc.

[0072] Please refer to Figure 1 , Figure 2 and Figure 4In some embodiments, the raw material in step S04 is formed in the positioning part 111, which can be formed by die casting or melt casting. After the raw material is formed by die casting or melt casting, a cooling process is further included to obtain the optical lens 12 with stable shape and optical performance. In some embodiments, the raw material used to form the optical lens 12 is a material commonly used in the field of optical lens 12, which will not be described here.

[0073] Referring to Figure 2 and Figure 4 In some embodiments, a step of separating the mold assembly 20 from the laser tube body 11 is further included. Specifically, the first mold 21 and the second mold 22 can be removed.

[0074] Referring to Figure 4 In some embodiments, a step of placing the laser 13 in the light path channel 1103, moving at least one of the laser 13 and the laser tube body 11 to determine the optimal focusing distance of the laser 13 and the optical lens 12, and fixing the laser 13 in the light path channel 1103 according to the determined optimal focusing distance is further included. Specifically, the laser 13 is placed in the light path channel 1103 and moved back and forth between the laser 13 and the laser tube body 11. When the optimal focusing distance is obtained, the position of the laser 13 in the light path channel 1103 is marked, and the laser 13 is fixed in the light path channel 1103 by gluing or welding, so that the laser tube module 10 has the optimal light path effect.

[0075] Referring to Figure 2 and Figure 4 In some embodiments, the positioning part 111 has a limiting surface 1111 and a connecting surface 1112, wherein the limiting surface 1111 faces the first port 1101 or the second port 1102, and the connecting surface 1112 is a partial inner wall surface of the light path channel 1103. In some embodiments, the limiting surface 1111 has two limiting surfaces, one of which faces the first port 1101 and the other of which faces the second port 1102, and the connecting surface 1112 is connected between the two limiting surfaces 1111. The limiting surface 1111 is used to limit the distance of the first mold 21 or the second mold 22 moving along the light path channel 1103, so as to effectively control the distance between the first die head 211 and the second die head 221, and make the raw material be formed into the optical lens 12 between the first die head 211 and the second die head 221. When the raw material is formed into the optical lens 12, the optical lens 12 is fixedly connected with the positioning part 111, specifically, the connecting surface 1112 is fixedly connected with the optical lens 12, so that the optical lens 12 is fixed in the laser tube body 11.

[0076] Referring to Figure 9In some embodiments, the positioning portion 111 has a positioning groove 1113 formed on the inner wall of the light path channel 1103, and the slot of the positioning groove 1113 faces the central axis of the light path channel 1103, thereby facilitating the connection reliability of the optical lens 12 and the laser tube body 11. In some embodiments, the connecting surface 1112 is formed with the positioning groove 1113. In some embodiments, the positioning groove 1113 is an annular groove, and in other embodiments, the positioning groove 1113 is a plurality of grooves arranged on the inner wall of the light path channel 1103. In some embodiments, the positioning portion 111 has a positioning boss (not shown in the figure) arranged on the inner wall of the optical channel, and the positioning boss protrudes towards the central axis of the light path channel 1103, and the positioning boss has the same effect as the positioning groove 1113. In some embodiments, the positioning boss is an annular boss arranged around the connecting surface 1112, and of course, a plurality of positioning bosses can be arranged on the connecting surface 1112.

[0077] Referring to Figure 2 and Figure 4 In some embodiments, the positioning portion 111 has a through hole 1114 penetrating the laser tube body 11. The structure of the through hole 1114 can not only be used for injecting raw materials, but also can be used for exhausting during the molding of the optical lens 12, and can also be used for improving the connection reliability of the optical lens 12 and the laser tube body 11 by allowing part of the raw materials to enter the through hole 1114 and be molded into the positioning portion 124 of the optical lens 12.

[0078] Referring to Figure 3 , Figure 4 In some embodiments, the first mold head 211 has a first surface 2111, and the second mold head 221 has a second surface 2211, and the first surface 2111 and the second surface 2211 are respectively used as the mold surface of the optical lens 12, that is, the molded optical lens 12 has a first lens surface 121 and a second lens surface 122; the first surface 2111 of the first mold head 211 is matched with the first lens surface 121; and the second surface 2211 of the second mold head 221 is matched with the second lens surface 122.

[0079] Referring to Figure 3 and Figure 4 In some embodiments, the first mold head 211 further has a third surface 2112 matched with the limiting surface 1111, and the outer edge of the first surface 2111 is connected with the third surface 2112. Through the third surface 2112, the gap that occurs when the first mold head 211 abuts against the limiting surface 1111 can be effectively reduced, the molding effect of the optical lens 12 is improved, and the optical precision of the optical lens 12 is further improved.

[0080] Referring toFigure 3 and Figure 4 In some embodiments, the second die 221 further has a fourth surface (not labeled in the figure) that is matched with the limiting surface 1111, and the outer edge of the second surface 2211 is connected with the fourth surface. Through the fourth surface, the gap that occurs when the second die 221 abuts against the limiting surface 1111 can be effectively reduced, the forming effect of the optical lens 12 is improved, and the optical precision of the optical lens 12 is further improved.

[0081] Referring to Figure 2 and Figure 4 In some embodiments, one of the first surface 2111 and the second surface 2211 is an arc surface, and the other is a plane; the optical lens 12 obtained by the above manufacturing method is an integrally formed wedge prism and collimating lens, and one of the first mirror surface 121 and the second mirror surface 122 of the optical lens 12 is an arc surface, and the other is a plane.

[0082] Referring to Figure 2 and Figure 4 In some embodiments, one of the first surface 2111 and the second surface 2211 is an arc surface, and the other is a plane; the optical lens 12 obtained by the above manufacturing method is a collimating lens, and one of the first mirror surface 121 and the second mirror surface 122 of the optical lens 12 is an arc surface, and the other is a plane.

[0083] Referring to Figure 2 and Figure 4 In some embodiments, the first surface 2111 and the second surface 2211 are both planes, and the first surface 2111 and the second surface 2211 are arranged at an angle; the optical lens 12 obtained by the above manufacturing method is a wedge prism, and the first mirror surface 121 and the second mirror surface 122 of the optical lens 12 are both planes, and the first mirror surface 121 and the second mirror surface 122 are arranged at an angle.

[0084] Referring to Figure 4 Through the above manufacturing method, the laser tube module 10 can be obtained.

[0085] Specifically, the laser tube module 10 comprises a laser tube body 11, an optical lens 12 and a laser 13; the laser tube body 11 has a first port 1101, a second port 1102 and a light path channel 1103 communicated between the first port 1101 and the second port 1102, and a positioning portion 111 is formed in the light path channel 1103; the optical lens 12 has a first mirror surface 121 and a second mirror surface 122, the optical lens 12 is fixed in the positioning portion 111 by molding from raw materials, and one of the first mirror surface 121 and the second mirror surface 122 faces the first port 1101, and the other one faces the second port 1102; the laser 13 is fixed in the optical channel for emitting laser to the optical lens 12. In the embodiment, since the optical lens 12 is directly molded with the laser tube body 11 and fixed in the positioning portion 111 of the laser tube body 11, the reliability and precision of the laser tube module 10 can be effectively improved, and the measurement error of the ranging device assembled by the laser tube module 10 can be reduced.

[0086] Referring to Figure 4 and Figure 2 In some embodiments, the optical lens 12 further has a circumferential side surface 123, and the circumferential side surface 123 is connected with a connecting surface 1112 of the positioning portion 111, so that the connection reliability of the optical lens 12 and the laser tube body 11 can be improved. In some embodiments, the optical lens 12 is an integrally molded wedge prism and a collimating lens. Of course, in other embodiments, the optical lens 12 is a collimating lens, or the optical lens 12 is a wedge prism.

[0087] Based on the above obtained laser tube module 10, the embodiment of the present application further provides a ranging device.

[0088] Referring to Figure 4 The ranging device of the embodiment comprises the above laser tube module 10. The ranging device provided by the present application can be used as a laser ranging component of a mobile robot. Since the laser emitting component of the ranging device is the above laser tube module 10, the ranging device has good structural reliability, can effectively improve the ranging reliability of the ranging device and reduce the ranging error, and when used as a ranging device of a mobile robot, can effectively improve the ranging accuracy of the mobile robot.

[0089] In order to better illustrate the technical solutions of the present application, the following embodiments are further explained.

[0090] Embodiment one

[0091] Referring to Figures 5 to 6 and Figure 2 and Figure 3 The embodiment provides a manufacturing method of the laser tube module 10, comprising the following steps:

[0092] (1) provide a laser tube body 11, a mold assembly 20 and a raw material 100 for forming an optical lens 12;

[0093] The laser tube body 11 has a first port 1101, a second port 1102 and a light path channel 1103 connecting the first port 1101 and the second port 1102, the first port 1101 and the second port 1102 are oppositely arranged, the inner wall of the light path channel 1103 is formed with a positioning portion 111, the positioning portion 111 is located between the first port 1101 and the second port 1102, and has a distance from the first port 1101 and the second port 1102, the positioning portion 111 has a limiting surface 1111 and a connecting surface 1112, the limiting surface 1111 faces the second port 1102 and is annular, the connecting surface 1112 is connected with the edge of the limiting surface 1111 close to the central axis of the light path channel 1103 and extends in the direction of the first port 1101, and the positioning portion 111 is further provided with a through hole 1114 penetrating the laser tube body 11;

[0094] The mold assembly 20 includes a first mold 21 and a second mold 22, the first mold 21 has a first die head 211, the first die head 211 is cylindrical, and the diameter of the first die head 211 is less than or equal to the inner diameter of the light path channel 1103 between the second port 1102 and the limiting surface 1111 (i.e. the diameter of the first die head 211 is within the range between the inner diameter and the outer diameter of the annular limiting surface 1111), the end of the first die head 211 is formed with a first surface 2111 and a third surface 2112, the first surface 2111 is an arc surface, i.e. the first surface 2111 is concave to the other end of the first mold 21, for assisting in forming the arc surface of the optical lens 12, the third surface 2112 is an annular surface to match the limiting surface 1111, the inner edge of the annular surface is connected with the outer edge of the first surface 2111, and the outer edge of the annular surface is connected with the side surface of the first mold 21; the second mold 22 has a second die head 221, the end of the second die head 221 is formed with a second surface 2211, the second surface 2211 is a plane, and when the second die head 221 is opposite to the first port 1101 or the second port 1102, the second surface 2211 is perpendicular to the central axis of the light path channel 1103.

[0095] (2) place the laser tube body 11 along the vertical direction, place the first mold 21 at the second port 1102, and the end of the first die head 211 faces the light path channel 1103, then insert the first mold 21 into the laser tube body 11, so that the third surface 2112 abuts against the limiting surface 1111, fix the first mold 21 and the laser tube body 11, so that the third surface 2112 and the limiting surface 1111 abut firmly without loosening.

[0096] (3), injecting the raw material 100 for forming the optical lens 12 into the laser tube body 11 from the first port 1101, so that the raw material 100 enters the positioning part 111 and falls on the first surface 2111.

[0097] (4), placing the second mold 22 at the first port 1101, and the second mold head 221 faces the light path channel 1103, then moving the second mold 22 along the light path channel 1103 to the direction of the positioning part 111, so as to pressure casting the raw material 100 into the positioning part 111, after natural cooling, taking out the first mold 21 and the second mold 22, obtaining the optical lens 12; the obtained optical lens 12 is a collimating lens, having a first mirror surface 121, a second mirror surface 122 and a circumferential side surface 123, the first mirror surface 121 is an arc surface and faces the second port 1102, the second mirror surface 122 is a plane perpendicular to the central axis of the light path channel 1103 and faces the first port 1101, the circumferential side surface 123 extends from the outer edge of the first mirror surface 121 to the second mirror surface 122 and is connected with the outer edge of the second mirror surface 122, the circumferential side surface 123 is fixedly connected with the connecting surface 1112, and part of the circumferential side surface 123 of the optical lens 12 protrudes into the through hole 1114 to form a clamping part 124, so that the optical lens 12 is fixed to the fixing part.

[0098] (5), placing the laser 13 into the light path channel 1103 from the first port 1101, moving the laser 13 or the laser tube body 11 back and forth to determine the optimal focusing distance of the laser 13 and the optical lens 12, then fixing the laser 13 in the light path channel 1103 according to the determined optimal focusing distance, obtaining the laser tube module 10.

[0099] Embodiment two

[0100] Please refer to Figures 7 to 8 and Figure 2 and Figure 3 , the embodiment provides a manufacturing method of the laser tube module 10, comprising the following steps:

[0101] (1), providing the laser tube body 11, the mold assembly 20 and the raw material 100 for forming the optical lens 12;

[0102] The laser tube body 11 has a first port 1101, a second port 1102, and a light path channel 1103 connecting the first port 1101 and the second port 1102, the first port 1101 and the second port 1102 are oppositely arranged, and an inner wall of the light path channel 1103 is formed with a positioning portion 111, the positioning portion 111 is close to the second port 1102, the positioning portion 111 has a limiting surface 1111 and a connecting surface 1112, the limiting surface 1111 is a local end surface of the second port 1102 and is in a circular ring shape, the connecting surface 1112 is connected with the limiting surface 1111 at an edge close to a central axis of the light path channel 1103 and extends in a direction of the first port 1101, and the positioning portion 111 is further provided with a through hole 1114 penetrating the laser tube body 11;

[0103] The mold assembly 20 comprises a first mold 21 and a second mold 22, the first mold 21 has a first die head 211, the first die head 211 is in a cylindrical shape, and a diameter of the first die head 211 is greater than a caliber of the second port 1102, an end portion of the first die head 211 is formed with a first surface 2111 and a third surface 2112, the first surface 2111 is an arc surface, that is, the first surface 2111 is concave to the other end of the first mold 21, so as to assist in forming an arc mirror surface of the optical lens 12, the third surface 2112 is a circular ring surface to match the limiting surface 1111, an inner edge of the circular ring surface is connected with an outer edge of the first surface 2111, and an outer edge of the circular ring surface is connected with an outer side surface of the first mold 21; the second mold 22 has a second die head 221, an end portion of the second die head 221 is formed with a second surface 2211, the second surface 2211 is a plane, and when the second die head 221 is opposite to the first port 1101 or the second port 1102, the second surface 2211 is perpendicular to a central axis of the light path channel 1103.

[0104] (2), the laser tube body 11 is placed in a vertical direction, the first mold 21 is placed at the second port 1102, and an end portion of the first die head 211 faces the light path channel 1103, so that the third surface 2112 abuts against the limiting surface 1111, the first mold 21 and the laser tube body 11 are fixed, so that the third surface 2112 and the limiting surface 1111 abut firmly and do not loosen.

[0105] (3), the raw material 100 for forming the optical lens 12 is injected into the laser tube body 11 from the first port 1101, so that the raw material 100 enters the positioning portion 111 and falls on the first surface 2111.

[0106] (4), the second mold 22 is placed in the first port 1101, and the second die head 221 is directed to the light path channel 1103, then the second mold 22 is moved along the light path channel 1103 to the direction of the positioning part 111, so that the raw material 100 is pressure cast to the positioning part 111, after natural cooling, the first mold 21 is removed, and the second mold 22 is taken out, to obtain the optical lens 12; the obtained optical lens 12 is a collimating lens, which has a first mirror surface 121, a second mirror surface 122 and a circumferential side surface 123, the first mirror surface 121 is an arc surface and is directed to the second port 1102, the second mirror surface 122 is a plane perpendicular to the central axis of the light path channel 1103 and is directed to the first port 1101, the circumferential side surface 123 extends from the outer edge of the first mirror surface 121 to the second mirror surface 122 and is connected with the outer edge of the second mirror surface 122, the circumferential side surface 123 is fixedly connected with the connecting surface 1112, and part of the circumferential side surface 123 of the optical lens 12 protrudes to the through hole 1114 to form a clamping part 124, so that the optical lens 12 is fixed to the fixing part.

[0107] (5), the laser 13 is placed in the light path channel 1103 from the first port 1101, the laser 13 or the laser tube body 11 is moved back and forth to determine the optimal focusing distance of the laser 13 and the optical lens 12, then the laser 13 is fixed in the light path channel 1103 according to the determined optimal focusing distance, to obtain the laser tube module 10.

[0108] Embodiment three

[0109] Please refer to Figures 9 to 10 and Figure 2 and Figure 3 , the embodiment provides a manufacturing method of the laser tube module 10, which comprises the following steps:

[0110] (1), providing the laser tube body 11, the mold assembly 20 and the raw material 100 for forming the optical lens 12;

[0111] Wherein, the laser tube body 11 has a first port 1101, a second port 1102 and a light path channel 1103 connecting the first port 1101 and the second port 1102, the first port 1101 and the second port 1102 are oppositely arranged, the inner wall of the light path channel 1103 forms a positioning part 111, the positioning part 111 is located between the first port 1101 and the second port 1102 and has a distance from the first port 1101 and the second port 1102, the positioning part 111 has a limiting surface 1111 and a connecting surface 1112, the limiting surface 1111 is directed to the second port 1102 and is in the form of a circular ring, the connecting surface 1112 is connected with the edge of the limiting surface 1111 close to the central axis of the light path channel 1103 and extends to the direction of the first port 1101, the connecting surface 1112 forms a limiting groove, and the slot of the limiting groove is directed to the central axis of the light path channel 1103.

[0112] The mold assembly 20 comprises a first mold 21 and a second mold 22. The first mold 21 has a first die head 211, which is cylindrical and has a diameter less than or equal to the inner diameter of the light path channel 1103 between the second port 1102 and the limiting surface 1111 (i.e., the diameter of the first die head 211 is within the range between the inner diameter and the outer diameter of the annular limiting surface 1111). The end of the first die head 211 is formed with a first surface 2111 and a third surface 2112. The first surface 2111 is an arc surface, which is concave to the other end of the first mold 21, for assisting in forming the arc surface of the optical lens 12. The third surface 2112 is an annular surface, which is adapted to the limiting surface 1111. The inner edge of the annular surface is connected to the outer edge of the first surface 2111, and the outer edge of the annular surface is connected to the outer side surface of the first mold 21. The second mold 22 has a second die head 221, the end of which is formed with a second surface 2211, which is a flat surface. When the second die head 221 is opposite to the first port 1101 or the second port 1102, the second surface 2211 is perpendicular to the central axis of the light path channel 1103.

[0113] (2) Place the laser tube body 11 in the vertical direction, place the first mold 21 at the second port 1102, and the end of the first die head 211 faces the light path channel 1103, so that the third surface 2112 abuts against the limiting surface 1111. Fix the first mold 21 and the laser tube body 11 so that the third surface 2112 and the limiting surface 1111 are firmly abutted without loosening.

[0114] (3) Inject the raw material 100 for forming the optical lens 12 into the laser tube body 11 from the first port 1101, so that the raw material 100 enters the positioning portion 111 and falls on the first surface 2111.

[0115] (4), the second mold 22 is placed in the first port 1101, and the second die head 221 is directed to the light path channel 1103, then the second mold 22 is moved along the light path channel 1103 to the direction of the positioning part 111, so that the raw material 100 is pressure cast to the positioning part 111, after natural cooling, the first mold 21 and the second mold 22 are taken out from the laser tube body 11, and the optical lens 12 is obtained; the obtained optical lens 12 is a collimating lens, which has a first mirror surface 121, a second mirror surface 122 and a circumferential side surface 123, the first mirror surface 121 is an arc surface and is directed to the second port 1102, the second mirror surface 122 is a plane perpendicular to the central axis of the light path channel 1103 and is directed to the first port 1101, the circumferential side surface 123 extends from the outer edge of the first mirror surface 121 to the second mirror surface 122 and is connected with the outer edge of the second mirror surface 122, the circumferential side surface 123 is fixedly connected with the connecting surface 1112, and the circumferential side surface 123 is formed with an annular protrusion matched with the limiting groove and is clamped in the limiting groove, so that the optical lens 12 is fixed to the fixing part.

[0116] (5), the laser 13 is placed in the light path channel 1103 from the first port 1101, the laser 13 or the laser tube body 11 is moved back and forth to determine the optimal focusing distance of the laser 13 and the optical lens 12, then the laser 13 is fixed in the light path channel 1103 according to the determined optimal focusing distance, and the laser tube module 10 is obtained.

[0117] Embodiment four

[0118] Please refer to Figures 11 to 12 and Figure 2 and Figure 3 , the embodiment provides a manufacturing method of the laser tube module 10, which comprises the following steps:

[0119] (1), providing a laser tube body 11, a mold assembly 20 and a raw material 100 for forming an optical lens 12;

[0120] Wherein, the laser tube body 11 has a first port 1101, a second port 1102 and a light path channel 1103 connecting the first port 1101 and the second port 1102, the first port 1101 and the second port 1102 are oppositely arranged, the inner wall of the light path channel 1103 is formed with a positioning part 111, the positioning part 111 is located between the first port 1101 and the second port 1102 and has a distance from the first port 1101 and the second port 1102, the positioning part 111 has a limiting surface 1111 and a connecting surface 1112, the limiting surface 1111 is directed to the second port 1102 and is in a circular ring shape, the connecting surface 1112 is connected with the edge of the limiting surface 1111 close to the central axis of the light path channel 1103 and extends to the direction of the first port 1101, and the positioning part 111 is further provided with a through hole 1114 penetrating through the laser tube body 11.

[0121] The mold assembly 20 comprises a first mold 21 and a second mold 22. The first mold 21 has a first mold head 211, which is cylindrical and has a diameter less than or equal to the inner diameter of the light path channel 1103 between the second port 1102 and the limiting surface 1111 (i.e. the diameter of the first mold head 211 is within the range between the inner diameter and the outer diameter of the annular limiting surface 1111). The end of the first mold head 211 is formed with a first surface 2111 and a third surface 2112. The first surface 2111 is an arc surface, which is concave to the other end of the first mold 21, for assisting in forming the arc surface of the optical lens 12. The third surface 2112 is an annular surface, which is adapted to the limiting surface 1111. The inner edge of the annular surface is connected to the outer edge of the first surface 2111, and the outer edge of the annular surface is connected to the side surface of the first mold 21. The second mold 22 has a second mold head 221, the end of which is formed with a second surface 2211, which is a flat surface. When the second mold head 221 is opposite to the first port 1101 or the second port 1102, the second surface 2211 is perpendicular to the central axis of the light path channel 1103.

[0122] (2) Place the laser tube body 11 horizontally with the through hole 1114 facing upwards, and place the first mold 21 at the second port 1102 with the end of the first mold head 211 facing the light path channel 1103, so that the third surface 2112 abuts against the limiting surface 1111. Fix the first mold 21 and the laser tube body 11 so that the third surface 2112 and the limiting surface 1111 are firmly abutted without loosening.

[0123] (3) Place the second mold 22 at the first port 1101 with the second mold head 221 facing the light path channel 1103, then move the second mold 22 along the light path channel 1103 in the direction of the positioning portion 111 until it stops at a preset position, and fix the second mold 22 and the laser tube body 11 so that the laser tube body 11 and the second mold 22 no longer move relative to each other. The preset position is a position where the space enclosed by the first mold head 211, the second mold head 221 and the positioning portion 111 is sufficient for casting the optical lens 12 when the molten raw material 100 is injected.

[0124] (4), after the raw material 100 for forming the optical lens 12 is melted, the melted raw material 100 is injected into the laser tube body 11 from the through hole 1114, so that the melted raw material 100 enters the positioning part 111 and is formed by casting in the positioning part 111, after natural cooling, the first mold 21 and the second mold 22 are taken out of the laser tube body 11, and the optical lens 12 is obtained; the obtained optical lens 12 is a collimating lens, which has a first mirror surface 121, a second mirror surface 122 and a circumferential side surface 123, the first mirror surface 121 is an arc surface and faces the second port 1102, the second mirror surface 122 is a plane perpendicular to the central axis of the light path channel 1103 and faces the first port 1101, the circumferential side surface 123 extends from the outer edge of the first mirror surface 121 to the second mirror surface 122 and is connected with the outer edge of the second mirror surface 122, the circumferential side surface 123 is fixedly connected with the connecting surface 1112, and part of the circumferential side surface 123 of the optical lens 12 protrudes to the through hole 1114 to form a clamping part 124, so that the optical lens 12 is fixed to the fixing part.

[0125] (5), the laser 13 is put into the light path channel 1103 from the first port 1101, the laser 13 or the laser tube body 11 is moved back and forth to determine the optimal focusing distance of the laser 13 and the optical lens 12, then the laser 13 is fixed in the light path channel 1103 according to the determined optimal focusing distance, and the laser tube module 10 is obtained.

[0126] Embodiment five

[0127] Please refer to Figures 13 to 14 and Figure 2 and Figure 3 , the embodiment provides a manufacturing method of the laser tube module 10, which comprises the following steps:

[0128] (1), providing a laser tube body 11, a mold assembly 20 and a raw material 100 for forming an optical lens 12;

[0129] Wherein, the laser tube body 11 has a first port 1101, a second port 1102 and a light path channel 1103 connecting the first port 1101 and the second port 1102, the first port 1101 and the second port 1102 are oppositely arranged, the inner wall of the light path channel 1103 is formed with a positioning part 111, the positioning part 111 is located between the first port 1101 and the second port 1102 and has a distance from the first port 1101 and the second port 1102, the positioning part 111 has a limiting surface 1111 and a connecting surface 1112, the limiting surface 1111 faces the second port 1102 and is in a circular ring shape, the connecting surface 1112 is connected with the edge of the limiting surface 1111 close to the central axis of the light path channel 1103 and extends in the direction of the first port 1101, and the positioning part 111 is further provided with a through hole 1114 penetrating the laser tube body 11;

[0130] The mold assembly 20 comprises a first mold 21 and a second mold 22. The first mold 21 has a first mold head 211, which is cylindrical and has a diameter less than or equal to the inner diameter of the light path channel 1103 between the second port 1102 and the limiting surface 1111 (i.e. the diameter of the first mold head 211 is within the range of the inner diameter and the outer diameter of the annular limiting surface 1111). The end of the first mold head 211 is formed with a first surface 2111 and a third surface 2112. The first surface 2111 is an arc surface, which is concave to the other end of the first mold 21, for assisting in forming the arc surface of the optical lens 12. The third surface 2112 is an annular surface, which is matched with the limiting surface 1111. The inner edge of the annular surface is connected with the outer edge of the first surface 2111, and the outer edge of the annular surface is connected with the side surface of the first mold 21. The second mold 22 has a second mold head 221, and the end of the second mold head 221 is formed with a second surface 2211, which is a flat surface. When the second mold head 221 is opposite to the first port 1101 or the second port 1102, the second surface 2211 forms a non-90° angle with the central axis of the light path channel 1103 (i.e. the second surface 2211 forms a certain angle with the diameter of the light path channel 1103 instead of being parallel to the diameter).

[0131] (2) The first mold 21 is placed at the second port 1102, and the end of the first mold head 211 faces the light path channel 1103. Then, the first mold 21 is inserted into the laser tube body 11, so that the third surface 2112 abuts against the limiting surface 1111, and the first mold 21 is fixed, so that the third surface 2112 and the limiting surface 1111 are firmly abutted.

[0132] (3) The raw material 100 for forming the optical lens 12 is injected into the laser tube body 11 from the first port 1101, so that the raw material 100 enters the positioning portion 111 and falls on the first surface 2111.

[0133] (4), the second mold 22 is placed in the first port 1101, and the second die head 221 is towards the light path channel 1103, then the second mold 22 is moved along the light path channel 1103 to the positioning part 111, so that the raw material 100 is pressure casting formed in the positioning part 111, after natural cooling, the first mold 21 and the second mold 22 are taken out, and the optical lens 12 is obtained; the obtained optical lens 12 is an integrated collimating lens and wedge prism, the optical lens 12 has a first mirror surface 121, a second mirror surface 122 and a circumferential side surface 123, the first mirror surface 121 is an arc surface and faces the second port 1102, the second mirror surface 122 faces the first port 1101 and is at an angle with the diameter of the light path channel 1103, the circumferential side surface 123 extends from the outer edge of the first mirror surface 121 to the second mirror surface 122 and is connected with the outer edge of the second mirror surface 122, the circumferential side surface 123 is fixedly connected with the connecting surface 1112, and part of the circumferential side surface 123 of the optical lens 12 protrudes to the through hole 1114 to form a clamping part 124, so that the optical lens 12 is fixed to the fixing part.

[0134] (5), the laser 13 is placed in the light path channel 1103 from the first port 1101, the laser 13 or the laser tube body 11 is moved back and forth to determine the optimal focusing distance of the laser 13 and the optical lens 12, then the laser 13 is fixed in the light path channel 1103 according to the determined optimal focusing distance, and the laser tube module 10 is obtained.

[0135] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of manufacturing a laser tube module, characterized by, The method comprises the following steps: providing a laser tube body, a mold assembly and a raw material for forming an optical lens; the laser tube body has a first port, a second port and a light path channel connecting the first port and the second port, an inner wall of the light path channel is formed with a positioning part, the positioning part has a limiting surface facing the second port; the mold assembly comprises a first mold and a second mold, the first mold has a first mold head, the second mold has a second mold head, an end of the first mold head is further provided with a third surface matched with the limiting surface; the first mold is placed in the second port, the first mold head faces the light path channel, the first mold and the laser tube body move along the light path channel to make the third surface abut against the limiting surface; the second mold is placed in the first port, the second mold heads all face the light path channel, the second mold and the laser tube body move along the light path channel to make the second mold be located at a preset position; after the third surface of the first mold abuts against the limiting surface, or after the third surface of the first mold abuts against the limiting surface and the second mold is located at the preset position, the raw material is injected into the laser tube body; the raw material is cooled to make the raw material be formed on the positioning part to obtain an optical lens; the optical lens is fixedly connected with the positioning part.

2. The method of claim 1, wherein the laser tube module is a laser diode module. the optical lens is compression molded or cast molded; the formed optical lens has a first mirror surface and a second mirror surface; the first mold head has a first surface matched with the first mirror surface; the second mold head has a second surface matched with the second mirror surface.

3. The method of claim 2, wherein the laser tube module is a laser diode module. the optical lens is an integrally formed wedge prism and collimating lens, one of the first mirror surface and the second mirror surface is an arc surface, and the other is a plane; one of the first surface and the second surface is an arc surface, and the other is a plane; or, the optical lens is a collimating lens, one of the first mirror surface and the second mirror surface is an arc surface, and the other is a plane; one of the first surface and the second surface is an arc surface, and the other is a plane; or, the optical lens is a wedge prism, the first mirror surface and the second mirror surface are both planes, and the first mirror surface and the second mirror surface are arranged at an angle; the first surface and the second surface are both planes, and the first surface and the second surface are arranged at an angle.

4. The method of claim 3, wherein the laser tube module is a laser diode module. an outer edge of the first surface is connected with the third surface; or, the positioning part has a limiting surface facing the direction of the first port, an end of the second mold head is further provided with a fourth surface matched with the limiting surface, and an outer edge of the second surface is connected with the fourth surface.

5. The method of claim 1 to 4, wherein the positioning part has a positioning groove, and a groove opening of the positioning groove faces a central axis of the light path channel; or, the positioning part has a positioning boss provided on an inner wall of the light path channel, and the positioning boss is convexly arranged towards the central axis of the light path channel.

6. The method of manufacturing a laser tube module according to any one of claims 1 to 4, wherein the positioning part is provided with a through hole penetrating the laser tube body.

7. The method of manufacturing a laser tube module according to any one of claims 1 to 4, wherein the method further comprises the steps of cooling treatment and separating the mold assembly from the laser tube body. and / or, further comprising the steps of placing a laser in the optical path channel, moving the laser and / or the laser tube body to determine an optimal focusing distance of the laser and the optical lens, and fixing the laser in the optical path channel.

8. A laser tube module, characterized in that The laser tube module is manufactured by the manufacturing method of the laser tube module according to any one of claims 1 to 7, and the laser tube module comprises: a laser tube body having a first port, a second port, and an optical path channel communicated between the first port and the second port, the optical path channel having a positioning portion formed therein; an optical lens having a first mirror surface and a second mirror surface, the optical lens being formed by a raw material and fixed to the positioning portion, and the first mirror surface facing the first port and the second mirror surface facing the second port; a laser fixed in the optical path channel for emitting laser to the optical lens.

9. The laser tube module of claim 8, wherein the laser tube module is configured to be mounted to a laser tube module mounting surface of a laser tube module mounting structure. The optical lens is an integrally formed wedge prism and collimating lens, or the optical lens is a collimating lens, or the optical lens is a wedge prism.

10. A ranging device, characterized by The distance measuring device comprises the laser tube module according to any one of claims 8 to 9.

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