WO2026031188A1 - Système d'émission laser et système lidar - Google Patents

Système d'émission laser et système lidar

Info

Publication number
WO2026031188A1
WO2026031188A1 PCT/CN2024/111163 CN2024111163W WO2026031188A1 WO 2026031188 A1 WO2026031188 A1 WO 2026031188A1 CN 2024111163 W CN2024111163 W CN 2024111163W WO 2026031188 A1 WO2026031188 A1 WO 2026031188A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
laser
emitting
microlens array
emitting section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/111163
Other languages
English (en)
Chinese (zh)
Other versions
WO2026031188A9 (fr
Inventor
肖锡晟
徐伊凡
刘军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Yinwang Intelligent Technology Co Ltd
Original Assignee
Shenzhen Yinwang Intelligent Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Yinwang Intelligent Technology Co Ltd filed Critical Shenzhen Yinwang Intelligent Technology Co Ltd
Priority to PCT/CN2024/111163 priority Critical patent/WO2026031188A1/fr
Priority to CN202480061041.3A priority patent/CN121909405A/zh
Publication of WO2026031188A1 publication Critical patent/WO2026031188A1/fr
Publication of WO2026031188A9 publication Critical patent/WO2026031188A9/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/484—Transmitters

Definitions

  • This application relates to the field of optical technology, and in particular to a laser emitting system and a lidar system.
  • Laser emission systems as a crucial component for vehicles to perceive their environment, play a vital role.
  • This application provides a laser emitting system and a lidar system that can effectively improve problems such as beam failure.
  • this application provides a laser emitting system, including a laser and a microlens array.
  • the laser has multiple light-emitting sections spaced apart along a first direction.
  • the microlens array receives incident light from the laser and deflects the incident light before transmitting outgoing light.
  • the multiple light-emitting sections include an Mth light-emitting section and an Nth light-emitting section.
  • the spatial projection area of the Mth light-emitting section covers the spatial projection area of the Nth light-emitting section.
  • M and N are both positive integers, and the difference between M and N is less than 5.
  • the beams generated by other light-emitting sections can effectively compensate for the failed sections. Therefore, the entire laser emitting system can still achieve good performance. Furthermore, configuring the microlens array can effectively improve the light emission uniformity of the entire laser emitting system, resulting in better overall performance.
  • the backward extension of the emitted light generated by the microlens array from the incident light of the Mth emitting unit passes through the Nth emitting unit.
  • the emitted light received by the target surface can be considered to be emitted by the Nth emitting unit. Therefore, when the Nth emitting unit fails or other adverse conditions occur, the laser beam generated by the Mth emitting unit can effectively compensate for the Nth emitting unit.
  • the laser includes multiple light sources.
  • the laser includes multiple light-emitting regions, each containing multiple light-emitting parts.
  • the number of light sources corresponds one-to-one with the number of light-emitting regions, and the laser emitted by each light source is emitted through the light-emitting part in its corresponding light-emitting region.
  • the laser has the function of zonal emission. In practical applications, different areas in space can be illuminated by controlling different light-emitting regions of the laser emission system, thereby improving the ability of zonal detection.
  • the transition band between different zones is small in practical applications, which is beneficial for balancing light compensation and zoned light control.
  • the microlens array comprises multiple lens units.
  • the distance between two adjacent light-emitting sections is D1, and the aperture of the light-emitting section is L1.
  • the distance between two adjacent lens units is D2, and the aperture of the lens unit is L2.
  • D2 L2
  • D2 is greater than 2(D1 + L1).
  • the microlens array comprises multiple lens units, each with a focal length of F.
  • the distance between the laser and the microlens array is Ld, where Ld is greater than 2F.
  • the focal length (or optical power) of the lens units and the distance between the laser and the microlens array can be appropriately set to enable the laser emission system to effectively balance optical compensation and localized emission.
  • the laser further includes multiple light-emitting sections spaced apart along a second direction, perpendicular to the first direction. Along the second direction, the backward extension of the emitted light generated from the incident light of any light-emitting section after processing by the microlens array passes through that light-emitting section.
  • the microlens array does not deflect the beam along the second direction to facilitate beam collimation and other processing.
  • the microlens array includes a first surface and a second surface that are opposite to each other.
  • the first surface is planar
  • the second surface includes a plurality of lens units arranged along a first direction, and each lens unit is a convex lens.
  • the microlens array is fixedly connected to the laser, which can effectively improve the integration of the laser emission system.
  • the laser emitting system also includes a collimating lens group.
  • the collimating lens group is located on the light-emitting side of the microlens array, and multiple light-emitting parts are located on the focal plane of the collimating lens group.
  • the collimating lens group is used to collimate the emitted light transmitted from the microlens array to improve the projection accuracy and distance of the laser beam.
  • the collimating lens assembly includes a lens barrel and at least one lens fixed inside the lens barrel, with a microlens array fixed inside the lens barrel, which helps to improve the integration of the laser emission system.
  • this application also provides a lidar system, including a laser receiving system and the aforementioned laser emitting system.
  • the laser emitting system projects a laser beam into space, and the laser receiving system receives laser beams reflected from objects in space, thereby achieving a detection function.
  • the lidar system provided by this application, by equipping it with the aforementioned laser emitting system, the stability and reliability of the lidar system can be effectively improved.
  • Figure 1 is a schematic diagram of an application scenario of a lidar system provided in an embodiment of this application;
  • FIG. 2 is a structural block diagram of a lidar system provided in an embodiment of this application.
  • Figure 3 is a simplified structural diagram of a conventional laser emission system provided in an embodiment of this application.
  • FIG. 4 is a simplified structural diagram of a laser emission system provided in an embodiment of this application.
  • Figure 5 is a simplified structural diagram of a partial structure of a laser emission system provided in an embodiment of this application.
  • Figure 6 is a simplified structural diagram of a partial structure of a laser emission system provided in an embodiment of this application.
  • Figure 7 is a simplified structural diagram of a partial structure of a laser emission system provided in an embodiment of this application.
  • Figure 8 is a simplified structural diagram of a partial structure of a laser emission system provided in an embodiment of this application.
  • Figure 9 is a simulation diagram of the light intensity distribution of a target surface provided in an embodiment of this application.
  • Figure 10 is a simulation diagram of another light intensity distribution of the target surface provided in an embodiment of this application.
  • Figure 11 is a simulation diagram of the light intensity distribution of a target surface provided in an embodiment of this application.
  • Figure 12 is a simulation diagram of another light intensity distribution of the target surface provided in an embodiment of this application.
  • Figure 13 is a plan view of a light-emitting surface provided in an embodiment of this application.
  • Figure 14 is a simplified structural diagram of a laser emission system provided in this application without a microlens array
  • Figure 15 is a simplified structural diagram of a laser emission system provided in an embodiment of this application.
  • Figure 16 is a simplified structural diagram of a partial structure of a laser emission system provided in an embodiment of this application.
  • Figure 17 is a plan view of another light-emitting surface provided in an embodiment of this application.
  • FIG. 18 is a simplified structural diagram of another laser emission system provided in an embodiment of this application.
  • FIG 19 is a structural block diagram of a lidar system provided in an embodiment of this application.
  • the LiDAR system 01 provided in this embodiment can be applied to a vehicle 02 to enable the vehicle 02 to have environmental perception capabilities. That is, through the LiDAR system 01, the vehicle 02 can detect and identify targets 03 or their surrounding environment, thereby assisting the driver in driving the vehicle and improving driving safety. Alternatively, some vehicles 02 can also rely on the LiDAR system 01 to achieve a higher level of autonomous driving capabilities.
  • the lidar system 01 mainly includes a laser emitting system 011 and a laser receiving system 012.
  • the laser emitting system 011 is used to emit a laser beam into the external environment.
  • a target object 03 such as a road, pedestrian, vehicle, etc.
  • the laser receiving system 012 receives the reflected laser beam to achieve the purpose of detecting and identifying road conditions or the environment.
  • the vehicle's perception ability can be improved by increasing the number of beams emitted by the laser emitting system.
  • the laser emitting system 011 is a vertical cavity surface emitting laser (VCSEL).
  • the VCSEL includes a light source 0111 and an emitting surface 0112, with multiple through-holes 01121 on the emitting surface 0112 (three are shown in Figure 3).
  • the dashed arrows in Figure 3 indicate the approximate propagation path of the laser beam.
  • the laser emitted from the light source 0111 can pass through... Through-hole 01121 emits laser beams outward, forming multiple beams that are ultimately projected onto target object 03.
  • the aperture of through-hole 01121 is relatively small, typically on the order of tens of micrometers.
  • defects such as dead pixels may occur, causing some through-holes 01121 to not effectively transmit the laser beam, or to transmit a beam with low intensity.
  • external dust or other impurities fall into through-holes 01121, they may block them, resulting in some through-holes not effectively transmitting the laser beam, or transmitting a beam with low intensity. Therefore, the light intensity received by different areas of target object 03 will vary significantly, easily leading to inaccurate identification or even detection loss.
  • embodiments of this application provide a laser emission system that can effectively improve problems such as beam failure.
  • the laser emitting system 10 includes a laser 11 and a microlens array (MLA).
  • the laser 11 includes a light source 111 and a light-emitting surface 110 for transmitting multiple laser beams.
  • the light source 111 generates laser beams and transmits multiple beams outward through the light-emitting surface 110.
  • the light-emitting surface 110 has multiple light-emitting sections (three are shown in Figure 4), namely light-emitting section 1101a, light-emitting section 1101b, and light-emitting section 1101c.
  • the multiple light-emitting sections are arranged at intervals along a first direction on the light-emitting surface 110, wherein the first direction is parallel to the light-emitting surface 110.
  • the laser generated by the light source 111 can be transmitted outward from the multiple light-emitting sections, thereby generating multiple laser beams.
  • the microlens array 12 faces the light-emitting surface 110 and is used to receive the laser beams transmitted from the light-emitting sections and deflect the laser beams before transmitting them.
  • the light-emitting surface 110 includes an Mth light-emitting section and an Nth light-emitting section.
  • the projection area of the Mth light-emitting section in space covers the projection area of the Nth light-emitting section in space, where M and N are both positive integers, and the difference between M and N is less than 5.
  • the light-emitting surface 110 includes three light-emitting sections and the difference between M and N is 1.
  • the example provided in this application shows three light-emitting sections: light-emitting section 1101a, light-emitting section 1101b, and light-emitting section 1101c.
  • Light-emitting sections 1101a, 1101b, and 1101c are arranged at intervals along a first direction. That is, in the first direction, light-emitting section 1101a is the first light-emitting section, light-emitting section 1101b is the second light-emitting section, and light-emitting section 1101c is the third light-emitting section.
  • the dashed arrows indicate the approximate propagation paths of the laser beams emitted from light-emitting sections 1101a, 1101b, and 1101c when the microlens array 12 is not provided. It is clear from Figure 5 that, without the microlens array 12, the laser beam emitted from light-emitting section 1101a projects onto the target surface 001 in area 001a, the laser beam emitted from light-emitting section 1101b projects onto the target surface 001 in area 001b, and the laser beam emitted from light-emitting section 1101c projects onto the target surface 001 in area 001c.
  • the solid arrows indicate the approximate propagation path of the laser beam emitted from the light-emitting section 1101b after the microlens array 12 is installed. It is clearly visible in Figure 5 that after the microlens array 12 is installed, the projection area of the laser beam emitted from the light-emitting section 1101b on the target surface 001 covers 001a, 001b, and 001c. That is, along the first direction, the spatial projection area of the second light-emitting section covers the spatial projection areas of the first and third light-emitting sections.
  • the light-emitting section 1101a or light-emitting section 1101c fails or other adverse conditions occur, the light beam generated by the light-emitting section 1101b can effectively compensate for the light-emitting sections 1101a and 1101c.
  • the entire laser emission system 10 can still achieve good performance.
  • the approximate propagation paths of other laser beams generated by the light-emitting section 1101b are also illustrated.
  • the laser beam emitted from the light-emitting section is defined as the incident light
  • the laser beam emitted from the microlens array 12 is defined as the emitted light. That is, the microlens array 12 receives the incident light from the light-emitting section, deflects the incident light, and then emits the emitted light.
  • FIG. 6 shows three incident lights: incident light S1, incident light S2, and incident light S3.
  • incident light S1 is essentially aligned with the principal optical axis of the microlens array 12; therefore, after passing through the microlens array 12, the propagation path of incident light S1 remains essentially unchanged, and it transmits outward light S11.
  • Incident light S2 after passing through the microlens array, undergoes a deflection in its propagation path and transmits outward light S11.
  • Light S21 is essentially aligned with the principal optical axis of the microlens array 12; therefore, after passing through the microlens array 12, the propagation path of incident light S1 remains essentially unchanged, and it transmits outward light S11.
  • Incident light S2 after passing through the microlens array, undergoes a deflection in its propagation path and transmits outward light S11.
  • Light S21 After the incident light from the light-emitting section 1101b is deflected by the microlens array
  • the incident light S3 passes through the microarray lens, its propagation path is deflected, and the outgoing light S31 is transmitted. Additionally, S20 is the backward extension of the outgoing light S21, and this backward extension S20 passes through the light-emitting section 1101a. S30 is the backward extension of the outgoing light S31, and this backward extension S30 passes through the light-emitting section 1101c.
  • the backward extension of the outgoing light S11 substantially coincides with the incident light S1, and therefore is not shown in Figure 6. That is, the backward extension of the outgoing light S11 passes through the light-emitting section 1101a.
  • the outgoing light S21 received by the target surface 001 can be considered to be emitted by the light-emitting section 1101a.
  • the outgoing light S31 received by the target surface 001 can be considered to be emitted by the light-emitting section 1101c. Therefore, when the light-emitting section 1101a or light-emitting section 1101c fails or other adverse conditions occur, the light beam generated by the light-emitting section 1101b can effectively compensate for the light-emitting sections 1101a and 1101c. Thus, the entire laser emission system 10 can still achieve good performance.
  • the area between two adjacent light-emitting sections is a non-transparent area.
  • the incident light from the light-emitting section can be reasonably deflected and the emitted light can be transmitted, so that the light intensity received by the target object has good uniformity.
  • FIG. 7 shows two incident beams, incident beam S4 and incident beam S5.
  • incident beam S4 after passing through the microlens array 12, has its propagation path deflected and is transmitted as outgoing beam S41.
  • S40 is the reverse extension of outgoing beam S41, and this reverse extension S40 passes through the opaque region between light-emitting sections 1101a and 1101b.
  • the target surface 001 can receive a surface light source with relatively uniform light intensity. That is, the microlens array 12 can improve the uniformity of the light spot, thereby reducing the adverse problems such as decreased accuracy or jitter in algorithm ranging caused by the speckling effect of the laser 11.
  • the backward extension of the emitted light from the light-emitting section 1101b can pass not only through light-emitting sections 1101a, 1101b, and 1101c, but also through the opaque regions between light-emitting sections 1101a and 1101b, and between light-emitting sections 1101b and 1101c. That is, the backward extension of the emitted light from the light-emitting section 1101b passes through the region containing light-emitting sections 1101a, 1101b, and 1101c. Therefore, it can effectively improve adverse conditions such as weak local light intensity and target detection loss caused by the failure of light-emitting sections 1101a or 1101c. Furthermore, it can effectively improve the uniformity of light emission from the entire laser 11, resulting in better performance of the entire laser emission system 10.
  • the above example is an illustrative description using light-emitting section 1101b as an example.
  • the backward extension of the light beam generated by light-emitting section 1101a can also pass through light-emitting section 1101b and the opaque area between light-emitting sections 1101a and 1101b.
  • the backward extension of the light beam generated by light-emitting section 1101c can also pass through light-emitting section 1101b and the opaque area between light-emitting sections 1101b and 1101c.
  • the backward extension of the emitted light generated after the incident light from the Mth light-emitting section is deflected by the microlens array 12 passes through the Nth light-emitting section.
  • the difference between M and N is 1.
  • the above example uses a difference of 1 between M and N as an illustrative example.
  • the difference between M and N can be any value of 2, 3, or 4.
  • the larger the difference between M and N the larger the deflection angle of the beam generated by a single light-emitting section by the microlens array 12, and the greater the backward extension of the emitted light corresponding to that light-emitting section can pass through more light-emitting sections. That is, the spatial projection area of that light-emitting section can cover more spatial projection areas of other light-emitting sections. Therefore, the fault tolerance rate for light-emitting section failure is greater. In other words, even when two, three, or four consecutive light-emitting sections adjacent to that light-emitting section fail, that light-emitting section can still effectively compensate for the failed light-emitting sections, improving the robustness of the entire laser 11.
  • light-emitting section 1101a for example, as shown in Figure 8, in another example provided in this application, six light-emitting sections are shown, namely light-emitting section 1101a, light-emitting section 1101b, light-emitting section 1101c, light-emitting section 1101d, light-emitting section 1101e, and light-emitting section 1101f.
  • Light-emitting sections 1101a, 1101b, 1101c, 1101d, 1101e, and 1101f are arranged at intervals along a first direction.
  • light-emitting section 1101a is the first light-emitting section
  • light-emitting section 1101b is the second light-emitting section
  • light-emitting section 1101c is the third light-emitting section
  • light-emitting section 1101d is the fourth light-emitting section
  • light-emitting section 1101e is the fifth light-emitting section
  • light-emitting section 1101f is the sixth light-emitting section.
  • the dashed arrows indicate the approximate propagation paths of the laser beams emitted from the six light-emitting sections when the microlens array 12 is not provided. It is clear from Figure 8 that, without the microlens array 12, the laser beam emitted from light-emitting section 1101a projects onto the target surface 001 in area 001a; the laser beam emitted from light-emitting section 1101b projects onto the target surface 001 in area 001b; the laser beam emitted from light-emitting section 1101c projects onto the target surface 001 in area 001c; and the laser beam emitted from light-emitting section 1101d projects onto the target surface 001 in area 001d.
  • the projection area of the laser beam transmitted from the light-emitting section 1101e on the target surface 001 is 001e
  • the projection area of the laser beam transmitted from the light-emitting section 1101f on the target surface 001 is 001f.
  • both light-emitting sections 1101e and 1101f are malfunctioning, therefore, neither region 001e nor region 001f receives a valid light beam.
  • the solid arrows indicate the approximate propagation path of the laser beam emitted from the light-emitting section 1101b after the microlens array 12 is set. It is clearly seen from Figure 8 that after the microlens array 12 is set, the projection area of the laser beam emitted from the light-emitting section 1101b on the target surface 001 covers 001a, 001b, 001c, 001d, 001e, and 001f. That is, along the first direction, the spatial projection area of the second light-emitting section covers the spatial projection area of the sixth light-emitting section. In summary, the spatial projection area of the Mth light-emitting section covers the spatial projection area of the Nth light-emitting section, where the difference between M and N is 4.
  • the light-emitting section 1101e or the light-emitting section 1101f fails or other adverse conditions occur, the light beam generated by the light-emitting section 1101b can effectively compensate for the light-emitting sections 1101e and 1101f. As a result, the entire laser emission system 10 can still achieve good performance.
  • this figure illustrates a simulation of the light intensity transmitted from the laser emission system 10 in Figure 8 onto the target surface 001 without the microlens array 12.
  • the horizontal axis represents different regions on the target surface 001
  • the vertical axis represents the light intensity. It is evident from Figure 9 that the light intensity in regions 001e and 001f is almost zero.
  • this figure illustrates the simulated light intensity of the laser beam transmitted from the laser emission system 10 in Figure 8 onto the target surface 001 when the microlens array 12 is set.
  • the horizontal axis represents different regions on the target surface 001
  • the vertical axis represents the light intensity. It can be clearly seen from Figure 12 that regions 001e and 001f have significant light intensities.
  • the above example is exemplified by the light-emitting surface 110 comprising six light-emitting sections.
  • the light-emitting surface 110 may include more light-emitting sections.
  • the light-emitting surface 110 includes 16 light-emitting portions 1101, which are arranged along the first direction at the same spacing.
  • the laser 11 provided in this embodiment also has the effect of zoned illumination.
  • the laser 11 includes four light sources: light source 111a, light source 111b, light source 111c, and light source 111d. Sixteen light-emitting sections 1101 are divided into four light-transmitting regions: light-transmitting region A1, light-transmitting region A2, light-transmitting region A3, and light-transmitting region A4. Each light-transmitting region includes four light-emitting sections 1101. Each light-transmitting region corresponds to one light source, and the intensity of the light transmitted from each light-transmitting region is approximately the same.
  • the laser generated by light source 111a is emitted outward from the four light-emitting sections 1101 in light-transmitting region A1, but not from the light-emitting sections 1101 in other light-transmitting regions.
  • the corresponding light sources can be turned on or off to illuminate different areas of the target surface 001.
  • the solid arrows in Figure 14 show the approximate paths of the light beams generated by the four light sources after passing through the four light-transmitting areas onto the target surface 001.
  • the illuminated areas on the target surface 001 differ depending on the light source.
  • the light spot transition zone can be significantly reduced, thereby achieving a better zoned lighting effect.
  • the solid arrows indicate the approximate paths of the light beams generated by the four light sources 111 after passing through the four light-transmitting areas and the microlens array 12, and then onto the target surface 001.
  • the illuminated areas on the target surface 001 differ depending on the light beams generated by the different light sources.
  • limiting the difference between M and N to less than 5 not only achieves the function of light intensity homogenization and compensation, but also avoids the significant influence of light energy in different zones, thus achieving a better zoned lighting effect.
  • parameters such as the aperture of the light-emitting section 1101, the distance between two adjacent light-emitting sections 1101, the optical power of the microlens array 12, and the distance between the light-emitting surface 110 and the microlens array 12 can be reasonably set so that the projection area of the Mth light-emitting section 1101 in space covers the projection area of the Nth light-emitting section 1101 in space along the first direction.
  • M and N are both positive integers, and the difference between M and N is less than 5.
  • laser 11 can be a vertical-cavity surface-emitting laser (VCSEL).
  • the aforementioned light source is specifically a semiconductor light-emitting device within the VCSEL, and the light-emitting surface 110 is the surface in the VCSEL used for light transmission.
  • the light-emitting portion 1101 can specifically be a through-hole fabricated through processes such as oxidation.
  • commonly used VCSELs can be selected as laser 11, which will not be elaborated upon in this application.
  • laser 11 can also employ other types of lasers with a light source and a light-emitting surface; this application does not limit the specific type of laser 11.
  • the microlens array 12 includes a first surface 121 and a second surface (not shown in Figure 16) that are opposite to each other.
  • the first surface 121 is planar
  • the second surface includes a plurality of lens units 122 arranged along a first direction.
  • all lens units 122 are convex lenses.
  • the laser beam will be deflected after passing through the lens units 122.
  • the distance between two adjacent lens units 122 and the radius of curvature of the lens units can be controlled at the micrometer level, giving the microlens array 12 a large tolerance, which is beneficial for blind mounting between the microlens array 12 and the laser 11 and ensuring beam quality.
  • the material of the microlens array 12 can be quartz, sapphire, glass, or polymer, etc.
  • the specific material and fabrication process of the microlens array 12 are selected and fabricated according to currently commonly used methods, and this application does not impose any restrictions on them.
  • the lens units 122 can be located on the second surface or on the first surface. In practical applications, the placement, quantity, curvature (or optical power) and other parameters of the lens unit 122 can be reasonably set according to actual needs.
  • the distance between two adjacent light-emitting sections 1101 along the first direction is D1
  • the aperture of the light-emitting section 1101 is L1.
  • the distance between two adjacent lens units 122 along the first direction is D2
  • the aperture of the lens unit 122 is L2.
  • D2 is approximately equal to L2, and D2 is greater than 2(D1+L1).
  • the projection area of the Mth light-emitting section 1101 along the first direction can cover the projection area of the Nth light-emitting section 1101 in space, and the difference between M and N is less than 5. That is, the laser emission system 10 can effectively balance light compensation and zoned emission.
  • the focal length F (or optical power) of the lens unit 122 can be reasonably set.
  • the focal length of each lens unit 122 can be F, and the distance between the laser 11 and the microlens array 12 is Ld, where Ld is greater than 2F.
  • Ld is greater than 2F.
  • the distance Ld between the laser 11 and the microlens array 12 is specifically the distance between the light-emitting surface 110 and the second surface of the microlens array 12.
  • the parameters mentioned above can be set reasonably according to actual needs, so that the laser emission system 10 can effectively balance light quantity compensation and zoned illumination.
  • the illustrative description is based on the fact that the light-emitting surface 110 includes a plurality of light-emitting portions 1101, and that the plurality of light-emitting portions 1101 are arranged only along a first direction. In other examples, the plurality of light-emitting portions 1101 may also be arranged along other directions parallel to the light-emitting surface 110.
  • the plurality of light-emitting portions 1101 in the light-emitting surface 110 are arranged not only along the first direction but also along the second direction.
  • the first direction is perpendicular to the second direction, and both the first and second directions are parallel to the light-emitting surface 110.
  • the microlens array 12 does not deflect the light propagation path.
  • the lens units in the microlens array 12 only have optical power in the first direction, so that light rays are deflected in the first direction after passing through the microlens array 12.
  • the microlens array 12 has no optical power in the second direction, so that light rays are not deflected in the second direction after passing through the microlens array 12.
  • the microlens array 12 can also deflect the incident light from the light-emitting section 1101 along the second direction.
  • the backward extension line of the transmitted light can pass through the non-transparent area around the light-emitting section 1101 without covering other light-emitting sections 1101, so that the microlens array 12 can achieve a slight light homogenization effect on the light-emitting section 1101.
  • the backward extension of the outgoing light can pass through the first, second, third, or fourth light-emitting sections 1101 adjacent to that light-emitting section 1101. That is... That is to say, the microlens array 12 has optical power in both the first and second directions, so that the microlens array 12 can deflect the light from the light-emitting part 1101 in both dimensions of the first and second directions.
  • the laser emitting system 10 may include other optical elements in its specific configuration.
  • the laser emitting system 10 also includes a collimating lens group 13.
  • the collimating lens group 13 is located on the light-emitting side of the microlens array 12 and is used to collimate the emitted light transmitted through the microlens array 12. That is, the divergent emitted light is transformed into a parallel beam after passing through the collimating lens group 13.
  • the directionality of the laser beam can be effectively improved, which is beneficial to increasing the light intensity received by the target surface, thereby ensuring the performance of the laser emitting system 10.
  • the light-emitting surface 110 of the laser 11 can be located on the focal plane of the collimating lens group 13, that is, the light-emitting surface 110 and the focal plane of the collimating lens group 13 are substantially coincident, or there can be a small dimensional deviation between the light-emitting surface 110 and the focal plane.
  • the focal plane of the collimating lens group 13 is also called the front focal plane or the object-side focal plane.
  • the collimating lens group 13 can effectively collimate the beam transmitted from each light-emitting section 1101, so that the laser emitting system 10 has better beam output performance.
  • the collimating lens group 13 may include a sleeve 131 and multiple lenses 132 located within the sleeve 131.
  • the multiple lenses 132 are arranged sequentially along the principal optical axis and refract light rays, thereby collimating the diverging beam into a parallel beam.
  • the lenses 132 may be concave lenses, convex lenses, or similar types.
  • the number and type of lenses in the collimating lens group 13 can be configured according to currently common methods, which will not be elaborated upon here.
  • the microlens array 12 can be fixed within the sleeve 131 of the collimating lens group 13 to achieve a fixed connection between the microlens array 12 and the collimating lens group 13, thereby ensuring the positional accuracy and reliability between the microlens array 12 and the collimating lens group 13. Furthermore, fixing the microlens array 12 within the sleeve 131 of the collimating lens group 13 also helps reduce the assembly difficulty of the entire laser emission system 10, ensuring the assembly accuracy between the laser 11, the microlens array 12, and the collimating lens group 13 while reducing complexity.
  • the microlens array 12 can be fixedly connected to the laser 11.
  • the aperture (or area) of the microlens array 12 is approximately the same as the light-emitting surface 110 of the laser 11, facilitating an effective connection between the laser 11 and the microlens array 12. This also helps improve the utilization rate of the aperture of the microlens array 12.
  • the microlens array 12 can also be installed between the laser 11 and the collimating lens group 13 via a separate lens tube.
  • the connection method between the laser 11, the microlens array 12, and the collimating lens group 13 can be reasonably configured according to actual needs, which will not be elaborated here.
  • the laser emission system 10 described above can be used in various scenarios where ranging or detection is achieved using lasers.
  • this application embodiment also provides a lidar system 20, including the aforementioned laser emitting system 10 and laser receiving system 21.
  • the laser emitting system 10 is used to project a laser beam into space
  • the laser receiving system 21 is used to receive the laser beam reflected by an object 001 in space.
  • the detection performance of the lidar system 20 can be effectively improved by equipping it with the aforementioned laser emitting system 10.
  • the beam generated by the laser emitting system 10 can still project laser beams into multiple areas in space, enabling the laser receiving system 21 to receive effectively reflected laser beams, thereby having better detection capabilities.
  • the laser emitting system 10 performs zoned illumination, since the crosstalk between different zones is sufficiently small, the reflected light received by the laser receiving system 20 also has obvious regionality, resulting in better detection performance. It is understood that in practical applications, the laser receiving system 21 can adopt currently commonly used types and structural forms, and this application does not limit the type of laser receiving system.
  • multiple means two or more.
  • “And/or” describes the relationship between related objects, indicating that there can be three relationships.
  • a and/or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

La présente demande se rapporte au domaine technique de l'optique et concerne un système d'émission laser et un système lidar, afin de résoudre les problèmes liés à la fiabilité médiocre des systèmes d'émission laser, etc. Le système d'émission laser fourni dans la présente demande comprend un laser et un réseau de microlentilles ; le laser comporte une pluralité de parties électroluminescentes agencées à intervalles dans une première direction ; le réseau de microlentilles est configuré pour recevoir la lumière incidente du laser, la dévier et la transmettre ; la pluralité de parties électroluminescentes comprend une M-ième partie électroluminescente et une N-ième partie électroluminescente, et une zone de projection spatiale de la M-ième partie électroluminescente couvre une zone de projection spatiale de la N-ième partie électroluminescente, M et N étant tous deux des nombres entiers positifs, et une valeur de différence entre M et N étant inférieure à 5. Dans le système d'émission laser fourni par la présente demande, lorsque des situations défavorables, telles que la défaillance de la N-ième partie électroluminescente se produisent, un faisceau lumineux généré par la M-ième partie électroluminescente peut compenser efficacement la N-ième partie électroluminescente, permettant ainsi à l'ensemble du système d'émission laser de conserver de bonnes performances, tout en améliorant efficacement l'uniformité de l'émission lumineuse.
PCT/CN2024/111163 2024-08-09 2024-08-09 Système d'émission laser et système lidar Pending WO2026031188A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2024/111163 WO2026031188A1 (fr) 2024-08-09 2024-08-09 Système d'émission laser et système lidar
CN202480061041.3A CN121909405A (zh) 2024-08-09 2024-08-09 一种激光发射系统和激光雷达系统

Applications Claiming Priority (1)

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PCT/CN2024/111163 WO2026031188A1 (fr) 2024-08-09 2024-08-09 Système d'émission laser et système lidar

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210033708A1 (en) * 2019-07-31 2021-02-04 OPSYS Tech Ltd. High-Resolution Solid-State LIDAR Transmitter
CN113777776A (zh) * 2021-09-10 2021-12-10 中国科学院光电技术研究所 大视场激光光束扫描系统及其设计方法和激光雷达装置
CN114651194A (zh) * 2019-09-03 2022-06-21 齐诺马蒂赛股份有限公司 用于固态lidar系统的投影仪
CN217823690U (zh) * 2022-06-22 2022-11-15 深圳迈塔兰斯科技有限公司 一种半导体激光器光源、光源阵列和多线激光雷达系统
US20220373688A1 (en) * 2021-05-19 2022-11-24 nEYE Systems, Inc. Lidar with microlens array and integrated photonic switch array
CN218040204U (zh) * 2022-09-08 2022-12-13 苏州长光华芯光电技术股份有限公司 一种激光加热装置
WO2024083699A1 (fr) * 2022-10-21 2024-04-25 Valeo Detection Systems GmbH Expanseur optique d'un système lidar et système lidar
CN220913346U (zh) * 2023-09-28 2024-05-07 上海禾赛科技有限公司 用于激光雷达的光发射装置及激光雷达

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210033708A1 (en) * 2019-07-31 2021-02-04 OPSYS Tech Ltd. High-Resolution Solid-State LIDAR Transmitter
CN114651194A (zh) * 2019-09-03 2022-06-21 齐诺马蒂赛股份有限公司 用于固态lidar系统的投影仪
US20220373688A1 (en) * 2021-05-19 2022-11-24 nEYE Systems, Inc. Lidar with microlens array and integrated photonic switch array
CN113777776A (zh) * 2021-09-10 2021-12-10 中国科学院光电技术研究所 大视场激光光束扫描系统及其设计方法和激光雷达装置
CN217823690U (zh) * 2022-06-22 2022-11-15 深圳迈塔兰斯科技有限公司 一种半导体激光器光源、光源阵列和多线激光雷达系统
CN218040204U (zh) * 2022-09-08 2022-12-13 苏州长光华芯光电技术股份有限公司 一种激光加热装置
WO2024083699A1 (fr) * 2022-10-21 2024-04-25 Valeo Detection Systems GmbH Expanseur optique d'un système lidar et système lidar
CN220913346U (zh) * 2023-09-28 2024-05-07 上海禾赛科技有限公司 用于激光雷达的光发射装置及激光雷达

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CN121909405A (zh) 2026-04-21

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