Light guide assembly, optical path system, transportation device, and optical device

Abstract

A transportation device or an optical device, comprising a light guide assembly and an optical path system, wherein the light guide assembly comprises a first optical mirror. The first optical mirror is configured for reflecting laser light output from a light source, wherein the first optical mirror comprises a MEMS micromirror.

Description

Light guide components, optical path systems, transportation equipment and optical equipment

[0001] This application claims priority to Chinese Patent No. 202411548883X, filed on October 30, 2024, entitled "Light Guide Components, Optical Path Systems, Transportation Equipment and Optical Devices", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of vehicle lighting technology, and particularly to a light guide component, optical path system, traffic equipment, and optical device. Background Technology

[0003] Laser applications typically combine with light guide components to achieve their illumination or vision functions. The light guide component must have at least a reflective structure to change the transmission path of the laser.

[0004] In related technologies, to meet the requirements of projection range, reflective structures generally directly reflect a large-sized light spot. Summary of the Invention

[0005] This application provides a light guide component that reduces space occupation, thereby at least partially solving the above-mentioned technical problems.

[0006] According to a first aspect of this application, a light guide assembly is provided, comprising:

[0007] The first reflector is configured to reflect the laser beam output from the light source;

[0008] The first reflector includes a MEMS micromirror.

[0009] In some embodiments of this application, the light guide assembly further includes:

[0010] The second reflector is configured to reflect the laser beam back to the first reflector.

[0011] In some embodiments of this application, the reflective plane of the second mirror is arranged parallel to at least one of the mirror axes of the MEMS micromirror.

[0012] In some embodiments of this application, the light guide assembly further includes:

[0013] An optical beam-constricting device is configured to concentrate the incident laser beam.

[0014] In some embodiments of this application, the optical beam shortening device is disposed between the light source and the second reflector in the direction of laser beam transmission.

[0015] In some embodiments of this application, the second reflector is disposed between the optical beam shortening device and the first reflector in the direction of laser beam transmission.

[0016] In some embodiments of this application, the MEMS micromirror comprises silicon carbide material.

[0017] In some embodiments of this application, the MEMS micromirror includes:

[0018] Base;

[0019] The reflector is configured to reflect laser beams;

[0020] A driving device is configured to drive the reflector to deflect;

[0021] The substrate comprises silicon carbide material, and the reflector and actuator are configured to be supported on the substrate.

[0022] In some embodiments of this application, the driving device further includes:

[0023] The first cantilever beam is configured to drive the reflector to deflect about the first galvanometer axis;

[0024] The second cantilever beam is configured to drive the reflector to deflect about the second galvanometer axis;

[0025] Wherein, one end of the first cantilever beam is connected to the substrate, and the other end is connected to the reflector; one end of the second cantilever beam is connected to the substrate, and the other end is connected to the reflector; the first galvanometer axis and the second galvanometer axis are arranged perpendicularly or obliquely to each other.

[0026] In some embodiments of this application, the light guide assembly includes:

[0027] The reflector bowl is set to produce parallel laser beams.

[0028] In some embodiments of this application, the light source further includes:

[0029] A fluorescent device is configured to convert the wavelength range of the laser light output from the light source.

[0030] In some embodiments of this application, the reflective bowl has a light-transmitting hole at its center.

[0031] In some embodiments of this application, the fluorescent device is disposed inside the reflective bowl and is positioned opposite to the center of the light-transmitting hole.

[0032] The MEMS micromirror includes:

[0033] The reflector is configured to reflect laser beams;

[0034] The ratio of the outer diameter of the reflector to the diameter of the light-transmitting hole ranges from 1.5 to 3.

[0035] According to a second aspect of this application, an optical path system is also provided, comprising:

[0036] The light guide assembly as described above;

[0037] The light source is set to output laser beams.

[0038] In some embodiments of this application, the light source includes:

[0039] The laser generator is configured to convert electrical energy into laser beams for output.

[0040] According to a third aspect of this application, a transportation device is also provided, including the light guide assembly or the optical path system described above.

[0041] In some embodiments of this application, the transportation equipment further includes:

[0042] An environmental detection device is configured to detect environmental information of the transportation equipment.

[0043] The controller is configured to control the intensity of the laser light output by the light source based at least on the environmental information of the traffic equipment.

[0044] The environmental detection device and the light source are electrically connected to the controller.

[0045] According to a fourth aspect of this application, an optical device is also provided, including the light guide assembly or the optical path system described above.

[0046] The beneficial effects of this application are: it provides a light guide component, optical path system, transportation equipment, and optical device that reduces the space occupied by the light guide component by reflecting laser light through a MEMS micro-mirror.

[0047] More specifically, some embodiments of this application may produce the following specific beneficial effects:

[0048] This application utilizes a MEMS micromirror to reflect laser light. By adjusting the exit deflection angle of the laser light through the MEMS micromirror, the illumination range can be autonomously adjusted, meeting the needs of intelligent lighting. Furthermore, because the MEMS micromirror reflects a relatively small light spot, the size of the reflective device associated with the MEMS micromirror can be correspondingly reduced, thereby minimizing the space required.

[0049] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0052] Figure 1 is a schematic diagram of the overall structure of the light guide component provided in an exemplary embodiment of this application;

[0053] Figure 2 is a schematic diagram showing the cooperation relationship between the reflector bowl and the fluorescent device in the light guide assembly provided in an exemplary embodiment of this application;

[0054] Figure 3 is a schematic diagram of the structure of the MEMS micro-mirror in the light guide assembly provided in an exemplary embodiment of this application;

[0055] Figure 4 is a schematic block diagram of the optical path system provided in an exemplary embodiment of this application;

[0056] Figure 5 is a schematic diagram of the overall structure of the vehicle provided in an exemplary embodiment of this application;

[0057] Figure 6 is a partial block diagram of the vehicle provided in an exemplary embodiment of this application.

[0058] Explanation of reference numerals in the attached figures: 100, light guide assembly; 110, first reflector; 110a, MEMS micro-mirror; 111, substrate; 112, reflector; 113, driving device; 113a, first cantilever beam; 113b, second cantilever beam; C1, first mirror axis; C2, second mirror axis; 120, second reflector; 130, light beam constriction device; 140, reflector bowl; 141, light-transmitting aperture; 150, fluorescent device; 10, optical path system; 200, light source; 210, laser generator; 1, traffic equipment; 310, environmental monitoring device; 320, controller. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0060] In related technologies, in order to meet the requirements of projection range, the reflective structure of the light guide component generally reflects a large-sized light spot directly, but this will cause the light guide component to occupy a large space.

[0061] In order to solve the above-mentioned technical problems, according to the first aspect of this application, referring to FIG1 and FIG2, this application provides a light guide assembly 100, including: a first reflector 110.

[0062] The first reflector 110 is configured to reflect laser light. The first reflector 110 includes a MEMS micromirror 110a.

[0063] It is understandable that MEMS (Micro-Electro-Mechanical System) micromirrors project laser light onto the area in front of the vehicle that needs to be illuminated through scanning. Based on the resonant frequency of the MEMS micromirror 110a, a spatial point in front of the vehicle can be illuminated 30 to 60 times in 1 second. The scanning of the light point forms a line, and the scanning of the light rays forms a surface. That is, by utilizing the principle of integration and the persistence of vision of the human eye, a smooth and continuous visual effect is created, giving people a better intuitive visual experience.

[0064] The above technical solution utilizes a MEMS micromirror 110a to reflect laser light. By adjusting the exit deflection angle of the laser light using the MEMS micromirror 110a, the illumination range can be autonomously adjusted, meeting the needs of intelligent lighting. Furthermore, because the MEMS micromirror 110a reflects a relatively small light spot, the size of the reflective device associated with the MEMS micromirror 110a can be correspondingly reduced, thereby minimizing the space required.

[0065] In some embodiments, referring to Figures 1 and 2, the light guide assembly 100 further includes a second reflector 120. The second reflector 120 is configured to reflect laser light back to the first reflector 110. By changing the propagation direction of the laser light through the second reflector 120, the structure of the light guide assembly 100 becomes more compact.

[0066] In some embodiments, referring to Figures 1 and 2, the reflecting plane of the second reflector 120 is arranged parallel to at least one of the mirror axes of the MEMS micromirror 110a. This ensures that the MEMS micromirror 110a can adjust the exit angle of the light reflected by the second reflector 120.

[0067] In some embodiments, referring to Figures 1 and 2, the light guide assembly 100 further includes a light beam converging device 130. The light beam converging device 130 is configured to converge the incident laser beam.

[0068] For example, the optical beam-constricting device 130 may be a lens or a combination of multiple lenses.

[0069] The laser beam is compressed by the optical beam-shrinking device 130 to fit the size of the reflective surface of the MEMS micro-mirror 110a, so as to avoid the beam being too large or too small and affecting the reflection efficiency of the MEMS micro-mirror 110a.

[0070] In some embodiments, referring to Figures 1 and 2, a beam-concentrating device 130 is disposed between the light source 200 and the second reflector 120 in the direction of laser beam transmission. Thus, the beam-concentrated laser beam is then emitted through the second reflector 120 and the MEMS micromirror 110a, improving energy utilization.

[0071] In some embodiments, referring to Figures 1 and 2, a second reflector 120 is disposed between the optical beam shortening device 130 and the first reflector 110 in the direction of laser beam transmission. Thus, the second reflector 120 adjusts the laser transmission direction between the optical beam shortening device 130 and the first reflector 110.

[0072] In some embodiments, referring to Figures 1 and 2, the MEMS micromirror 110a comprises silicon carbide material. That is, the MEMS micromirror 110a of this application is a SiC MEMS micromirror 110a.

[0073] The MEMS micro-mirror 110a of this application is based on silicon carbide material. As a silicon carbide device, the MEMS micro-mirror 110a of this application has the following advantages:

[0074] High temperature stability: Compared with silicon-based devices, the MEMS micro-mirror 110a of this application has higher thermal stability and can work stably for a long time in high temperature environments, typically reaching temperatures above 200 degrees Celsius.

[0075] High efficiency: Silicon carbide devices have lower energy loss, especially under high temperature and high frequency conditions, and their energy conversion efficiency is much higher than that of silicon-based devices. This enables the MEMS micromirror 110a of this application to achieve more efficient use of electrical energy for control and reduce energy waste.

[0076] Long lifespan: The 110a MEMS micromirror based on silicon carbide material has a longer lifespan.

[0077] Therefore, the MEMS micro-mirror 110a based on silicon carbide material of this application has significant advantages in terms of high temperature stability, high efficiency and long life. It can withstand harsh working conditions such as long-term high temperature and vibration, and achieve high efficiency and long life.

[0078] In some embodiments, referring to FIG3, the MEMS micromirror 110a includes: a substrate 111, a reflector 112, and a driving device 113.

[0079] The substrate 111 serves as the supporting structure for the MEMS micromirror 110a, providing a stable platform. The substrate 111 also houses electrodes and circuits, serving to transmit power and signals. Simultaneously, the substrate 111 acts as a heat conduction channel, transferring the heat generated by the MEMS micromirror 110a to the surrounding environment to maintain the temperature stability of the MEMS micromirror 110a. The reflector 112 has a reflective surface and is configured to reflect laser light; the driving device 113 is configured to drive the reflector 112 to deflect.

[0080] Specifically, the driving device 113 achieves the deflection of the reflector 112 based on at least one of the electric field, magnetic field, thermal expansion effect and piezoelectric effect.

[0081] The substrate 111 includes silicon carbide material, and the reflector 112 and the actuator 113 are configured to be supported on the substrate 111.

[0082] As a specific embodiment, referring to Figure 3, the driving device 113 includes: a first cantilever beam 113a and a second cantilever beam 113b.

[0083] One end of the first cantilever beam 113a is connected to the base 111, and the other end is connected to the reflector 112; the first cantilever beam 113a is configured to drive the reflector 112 to deflect around the first galvanometer axis C1; one end of the second cantilever beam 113b is connected to the base 111, and the other end is connected to the reflector 112; the second cantilever beam 113b is configured to drive the reflector 112 to deflect around the second galvanometer axis C2; the first galvanometer axis C1 and the second galvanometer axis C2 are perpendicular or inclined to each other.

[0084] By deflecting the first galvanometer axis C1 and the second galvanometer axis C2 at different angles, laser light is projected and scanned onto the front of the vehicle, thereby illuminating the driver's field of vision.

[0085] For example, the first galvanometer axis is defined as the slow axis, which is mainly responsible for scanning the vertical light rays in the driver's field of vision. The second galvanometer axis is defined as the fast axis, which is mainly responsible for scanning the horizontal image in the driver's field of vision. The laser light is projected out by the reflector 112 of the MEMS micro-mirror 110a scanning in both the slow and fast axes.

[0086] When a vehicle is detected to need to turn left or right, the laser beam can be projected onto the driver's left or right side of their field of vision. When a vehicle is detected to be going downhill or uphill, the laser beam can be shifted downward or upward, thereby expanding the driver's field of vision, reducing blind spots when turning or going uphill / downhill, and preventing accidents.

[0087] In some embodiments, referring to Figures 1 and 2, the light guide assembly 100 further includes a reflector bowl 140. The reflector bowl 140 is configured to generate parallel laser beams.

[0088] Compared to traditional laser headlights, which have a larger emitted light spot area and require a larger reflector bowl 140, this application utilizes a MEMS micro-mirror 110a for reflection, requiring a smaller light spot area. This allows for a reduction in the size of the reflector bowl 140. Verification has shown that the size of the reflector bowl 140 in this application is 10% to 25% of the size of the reflector bowl 140 in traditional laser headlights.

[0089] In some embodiments, referring to Figures 1 and 2, the light guide assembly 100 further includes a fluorescent device 150. The fluorescent device 150 is at least configured to convert the wavelength range of the laser light output from the light source 200.

[0090] For example, the laser light output by the light source 200 is monochromatic light (e.g., blue light). When used for lighting purposes, the fluorescent device 150 converts the monochromatic light into white light. After being projected by the MEMS micromirror 110a, the white light can increase the high-brightness range in the driver's field of vision, achieving uniform light brightness in the area in front of the driver's field of vision. When applied to other fields, such as optical devices like projectors, it can also be converted into other colors of light.

[0091] Of course, the fluorescent device 150 can also change the light intensity and beam angle of the laser beam.

[0092] In some embodiments, referring to Figures 1 and 2, a light-transmitting hole 141 is provided at the center of the reflector bowl 140. In this way, the incident laser can pass through the center of the reflector bowl 140 and be projected onto the fluorescent device 150.

[0093] In some embodiments, referring to Figures 1 and 2, the fluorescent device 150 is disposed inside the reflector bowl 140 and is positioned opposite the center of the light-transmitting hole 141. It can be understood that the fluorescent device 150 is positioned near the focal point of the reflector bowl 140. This positioning of the fluorescent device 150 results in a compact structure.

[0094] In some embodiments, the ratio of the outer diameter of the reflector 112 to the aperture of the light-transmitting hole 141 ranges from 1.5 to 3. Using such a ratio parameter ensures that the size of the light-transmitting hole matches the size of the reflector, thereby guaranteeing that the reflector can effectively reflect the laser fiber while reducing the size of the reflector bowl.

[0095] In one example of this application, the ratio of the outer diameter of the reflector to the diameter of the light-transmitting hole is 2.

[0096] As a specific design, the outer diameter of the reflector can range from 8mm to 12mm.

[0097] It is understandable that the outer diameter of the reflector can range from 8mm to 9mm, 9mm to 10mm, 10mm to 11mm, or 11mm to 12mm.

[0098] In one example of this application, the outer diameter of the reflector is 10 mm.

[0099] As a specific solution, the inner diameter of the light-transmitting hole ranges from 4mm to 8.4mm.

[0100] It is understandable that the inner diameter of the light-transmitting hole can range from 4mm to 5mm, 5mm to 6mm, 6mm to 7mm, 7mm to 8mm, or 8mm to 8.4mm.

[0101] In one example of this application, the inner diameter of the light-transmitting hole ranges from 5 mm to 7 mm.

[0102] This application exemplarily describes the operation of the light guide assembly 100:

[0103] The incident laser beam irradiates the fluorescent device 150 to generate white light. After being reflected and focused by the reflector bowl 140, the white light enters the light beam converging device 130. Then, it is emitted by the second reflector 120 and enters the MEMS micro-mirror 110a of the first reflector 110. The MEMS micro-mirror 110a projects the laser beam to the area to be illuminated by scanning.

[0104] According to a second aspect of this application, referring to FIG4, an optical path system 10 is provided, including a light source 200 and a light guide component 100 as described above. The light source 200 is configured to output laser light. This optical path system 10 has all the beneficial effects of the light guide component 100 described above, which will not be repeated here.

[0105] In some embodiments, referring to FIG4, the light source 200 further includes a laser generator 210. The laser generator 210 is configured to convert electrical energy into laser light output. The laser generator 210 is a technology well known in the art and will not be described in detail here.

[0106] As an optional solution, the incident laser is provided by the laser generator 210. The intensity and amount of incident laser light can be adjusted by controlling the laser generator through a program (the control of the laser generator is well known in the art and will not be described in detail here). This can increase the intensity of light, weaken the intensity of light, or turn off the light, thereby achieving the adjustment of the intensity or amount of light.

[0107] The application provides an exemplary description of a portion of the operation of an optical path system applied to a vehicle:

[0108] When low beam is needed, the power of the laser generator is adjusted to reduce the amount or intensity of light entering the vehicle, allowing the MEMS micro-mirror 110a to scan at a position closer to the vehicle, thus achieving the effect of low beam. When high beam is needed, the power of the laser generator is adjusted to increase the amount or intensity of light entering the vehicle, allowing the MEMS micro-mirror 110a to scan at the high beam position, thus achieving the effect of high beam. Because the MEMS micro-mirror 110a can quickly switch scanning positions, combining the adjustment of light intake and intensity can achieve both low beam and high beam effects without the need for additional combinations.

[0109] At the same time, when the location of an oncoming person or vehicle is detected, the intensity and amount of light entering the laser beam are adjusted, or even the light entering the beam is turned off when the location of a person or vehicle is scanned, thereby avoiding direct irradiation of the person or vehicle.

[0110] According to a third aspect of this application, referring to FIG5, a transportation device 1 is provided, including the light guide component 100 described above or the optical path system described above. This transportation device 1 possesses all the beneficial effects of the light guide component 100 or the optical path system described above, which will not be elaborated further herein.

[0111] It is understandable that transportation equipment 1 includes vehicles, ships, etc.

[0112] For example, referring to FIG5, the transportation equipment 1 is a vehicle, which may be a fuel vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not specifically limit it.

[0113] In some embodiments, referring to FIG6, the transportation equipment 1 further includes an environmental monitoring device 310 and a controller 320.

[0114] The environmental detection device 310 is configured to detect the environmental information of the traffic equipment 1; the controller 320 can be the ECU or BCU of the vehicle, and the controller 320 is configured to control the intensity of the laser light output by the light source 200 at least according to the environmental information of the traffic equipment 1; the environmental detection device 310 and the light source 200 are electrically connected to the controller respectively.

[0115] For example, the following describes part of the working process using a vehicle as an example:

[0116] Since the illuminated area of ​​the MEMS micro-mirror 110a is dynamically scanned, the optical path system based on the MEMS micro-mirror 110a can be integrated with environmental detection. When an oncoming vehicle or person is detected, the position of the vehicle or person can be accurately "turned off" through intelligent judgment (the turning off of the light in this application can be understood as: when the beam scans the position, the laser generator is turned off), which neither affects the normal lighting needs nor causes safety hazards by directly shining on the vehicle or person.

[0117] As an optional solution, the environmental monitoring device 310 includes one or more of the following: lidar, millimeter-wave radar, ultrasonic radar, and vision system.

[0118] According to a third aspect of this application, an optical device is provided, including the light guide component 100 described above or the optical path system described above. This optical device possesses all the beneficial effects of the light guide component 100 or the optical path system described above, which will not be elaborated further here.

[0119] For example, the optical device may be a projector.

[0120] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0121] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0122] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0123] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A light guide assembly (100), comprising: The first reflector (110) is configured to reflect the laser beam output from the light source (200); The first reflector (110) includes a MEMS micromirror (110a).

2. The light guide assembly (100) according to claim 1 further includes: The second reflector (120) is configured to reflect the laser beam back to the first reflector (110).

3. The light guide assembly (100) according to claim 2, wherein, The reflective plane of the second reflector (120) is arranged parallel to at least one of the mirror axes of the MEMS micro-mirror (110a).

4. The light guide assembly (100) according to claim 2 or 3 further comprises: An optical beam-constricting device (130) is configured to concentrate the incident laser beam.

5. The light guide assembly (100) according to claim 4, wherein, In the direction of laser beam transmission, the optical beam shortening device (130) is disposed between the light source (200) and the second reflector (120).

6. The light guide assembly (100) according to claim 4, wherein, In the direction of laser beam transmission, the second reflector (120) is disposed between the optical beam constrictor (130) and the first reflector (110).

7. The light guide assembly (100) according to any one of claims 1 to 6, wherein, The MEMS micromirror (110a) is made of silicon carbide.

8. The light guide assembly (100) according to claim 7, wherein, The MEMS micromirror (110a) includes: Base (111); Reflector (112), configured to reflect laser beams; and A driving device (113) is configured to drive the reflector (112) to deflect; The substrate (111) comprises silicon carbide material, and the reflector (112) and the actuator (113) are configured to be supported on the substrate (111).

9. The light guide assembly (100) according to claim 8, wherein, The driving device (113) includes: The first cantilever beam (113a) is configured to drive the reflector (112) to deflect about the first galvanometer axis (C1); and The second cantilever beam (113b) is configured to drive the reflector (112) to deflect about the second galvanometer axis (C2); Wherein, one end of the first cantilever beam (113a) is connected to the base (111), and the other end is connected to the reflector (112); one end of the second cantilever beam (113b) is connected to the base (111), and the other end is connected to the reflector (112); the first galvanometer axis (C1) and the second galvanometer axis (C2) are arranged perpendicularly or obliquely to each other.

10. The light guide assembly (100) according to any one of claims 1 to 6, wherein, The light guide assembly (100) includes: The reflector bowl (140) is configured to produce parallel laser beams.

11. The light guide assembly (100) according to claim 10, further comprising: The fluorescent device (150) is configured to convert the wavelength range of the laser light output from the light source (200).

12. The light guide assembly (100) according to claim 11, wherein, The reflector bowl (140) has a light-transmitting hole (141) in the center.

13. The light guide assembly (100) according to claim 12, wherein, The fluorescent device (150) is disposed inside the reflector bowl (140) and is positioned opposite to the center of the light-transmitting hole (141).

14. The light guide assembly (100) according to claim 13, wherein, The MEMS micromirror (110a) includes: The reflector (112) is configured to reflect laser beams; The ratio of the outer diameter of the reflector (112) to the aperture of the light-transmitting hole (141) ranges from 1.5 to 3.

15. An optical path system (10), comprising: The light guide assembly (100) as described in any one of claims 1 to 14; and The light source (200) is set to output laser beams.

16. The optical path system (10) according to claim 15, wherein, The light source (200) includes: The laser generator (210) is configured to convert electrical energy into laser beam output.

17. A transportation device (1) comprising a light guide assembly (100) according to any one of claims 1 to 14 or an optical path system (10) according to any one of claims 15 to 16.

18. The transportation equipment (1) according to claim 17, further comprising: An environmental monitoring device (310) is configured to detect the environmental information of the transportation equipment (1); and The controller (320) is configured to control the intensity of the laser light output by the light source (200) based at least on the environmental information of the traffic equipment (1); The environmental detection device (310) and the light source (200) are electrically connected to the controller (320).

19. An optical device comprising a light guide assembly (100) according to any one of claims 1 to 14 or an optical path system (10) according to any one of claims 15 to 16.

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