EP3658948A1 - Sendevorrichtung für ein abtastendes optisches detektionssystem eines fahrzeugs, detektionssystem, fahrerassistenzsystem und verfahren zum optischen abtasten eines überwachungsbereichs - Google Patents
Sendevorrichtung für ein abtastendes optisches detektionssystem eines fahrzeugs, detektionssystem, fahrerassistenzsystem und verfahren zum optischen abtasten eines überwachungsbereichsInfo
- Publication number
- EP3658948A1 EP3658948A1 EP18745582.9A EP18745582A EP3658948A1 EP 3658948 A1 EP3658948 A1 EP 3658948A1 EP 18745582 A EP18745582 A EP 18745582A EP 3658948 A1 EP3658948 A1 EP 3658948A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- transmission
- diffraction unit
- transmission signal
- beam directions
- 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
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 230000003287 optical effect Effects 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 204
- 230000010287 polarization Effects 0.000 claims description 47
- 238000011156 evaluation Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 7
- 230000005855 radiation Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- 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
- G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
- G01S7/4815—Constructional features, e.g. arrangements of optical elements of transmitters alone using multiple transmitters
-
- 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
- G01S7/499—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using polarisation effects
-
- 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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
Definitions
- the invention relates to a transmitting device for a scanning optical detection system of a vehicle for monitoring at least one monitoring area on objects, with at least one light source for generating at least one optical transmission signal and at least one diffractive unit diffractively acting on the at least one transmission signal for controlling at least one beam direction of the at least a transmission signal.
- the invention relates to a scanning optical detection system of a vehicle for monitoring a surveillance area on objects, comprising
- At least one transmitting device having at least one light source for generating at least one optical transmission signal and at least one diffraction unit diffractively acting on the at least one transmission signal for controlling at least one beam direction of the at least one transmission signal,
- At least one receiving device for receiving at least one optical received signal resulting from at least one transmitted signal which is reflected at an object
- control and / or evaluation device for controlling the at least one transmitting device and / or the at least one receiving device and / or for evaluating received signals received by the at least one receiving device.
- the invention relates to a driver assistance system of a vehicle
- At least one scanning optical detection system for monitoring a surveillance area on objects which has at least one detection system
- At least one transmitting device having at least one light source for generating at least one optical transmission signal and at least one diffraction unit diffractively acting on the at least one transmission signal for controlling at least one beam direction of the at least one transmission signal, at least one receiving device for receiving at least one optical received signal resulting from at least one transmitted signal which is reflected at an object,
- control and / or evaluation device for controlling the at least one transmitting device and / or the at least one receiving device and / or for evaluating received signals received by the at least one receiving device
- driver assistance system has at least one control and / or evaluation device for processing object information detected by the at least one detection system.
- the invention further relates to a method for optically scanning a surveillance area for objects with a detection system of a vehicle, in which at least one optical transmission signal is generated and diffracted to control at least one beam direction of the at least one transmission signal with at least one diffractive diffraction unit.
- US 20160161600 A1 discloses a LIDAR-based system and a method which are used for beam shaping and control of laser beams using an optical phased array (OPA) photonic integrated circuit (PIC) and the detection of laser beams using done by photodetectors.
- OPA optical phased array
- PIC photonic integrated circuit
- the invention has for its object to design a transmitting device, a detection system, a driver assistance system and a method of the type mentioned, in which the transmission energy of the at least one light source can be used more efficiently and an opening angle of a field of view of the detection system can be increased overall.
- the object is achieved in the transmission device characterized in that at least one diffraction unit is arranged in at least two different signal paths of a transmission signal or different transmission signals, said transmission unit being adjustable for setting the beam directions belonging to the respective signal paths,
- At least one beam alignment device is arranged for aligning the set beam directions in the at least one monitoring area
- one or more transmission signals are diffracted with at least two different signal paths with at least one diffractive diffraction unit in order to set their respective beam direction.
- separate diffraction units can be arranged in at least two of the signal paths. In this way, the beam directions in the signal paths can be set independently.
- a separate diffraction unit can be arranged in each of the signal paths.
- the at least one beam alignment device it is achieved that the transmission signals diffracted by the at least one diffraction unit are respectively radiated into the surveillance area.
- the at least one angular offset between the set beam directions ensures that the respective set beam directions are inclined to each other. In this way, a corresponding larger opening angle can be covered.
- a transmission signal diffracted at a diffraction unit propagates in a main lobe and at least one sidelobe.
- the transmission energy of the transmission signal is divided between the main lobe and the sidelobes, wherein the greater part of the transmission energy usually falls on the main lobe.
- suitable arrangements can be provided in the signal paths in front of the at least one beam alignment device in order to predetermine the at least one angular offset.
- the at least one angular offset between the set beam directions can be predetermined with the at least one beam alignment device.
- the detection system can operate according to a light transit time method.
- Optical pulse detection time-of-flight optical detection systems may be configured and referred to as time-of-flight (TOF), light-detection-and-ranging (LiDAR), laser-detection-and-ranging (LaDAR) systems, or the like become.
- TOF time-of-flight
- LiDAR light-detection-and-ranging
- LaDAR laser-detection-and-ranging
- the detection system may be a scanning system.
- a monitoring area can be scanned, ie scanned, with transmission signals.
- the corresponding transmission signals in particular transmission beams, can be swiveled with respect to their propagation direction over the monitoring area by means of at least one diffraction unit.
- the detection system can be a laser-based measuring system, in particular a distance measuring system.
- the laser-based distance measuring system can have as light source at least one laser, in particular a diode laser.
- pulsed transmission beams can be transmitted as transmission signals with the at least one laser.
- a laser coherent light can be generated with high energy density.
- the laser transmission signals can be emitted in visible or invisible to the human eye frequency ranges.
- a receiving device may have a detector designed for the frequency of the emitted light, in particular an angle-resolving detector.
- the laser-based measuring system can advantageously be a laser scanner. With a laser scanner, a surveillance area can be scanned with in particular pulsed laser beams.
- the invention is used in a vehicle, in particular a motor vehicle.
- the invention can be used in a land vehicle, in particular a passenger car, truck, a bus, a motorcycle or the like, an aircraft and / or a watercraft.
- the invention can also be used in autonomous or at least partially autonomous vehicles.
- the detection system may advantageously be connected to or part of at least one electronic control device of the vehicle, in particular a driver assistance system and / or a chassis control and / or a driver information device and / or a parking aid.
- a driver assistance system and / or a chassis control and / or a driver information device and / or a parking aid.
- the object data detected by the detection system in particular the distance, orientation and / or relative speed of an object relative to the vehicle, transmitted to the control device and for influencing driving functions, in particular the speed, a brake function, a steering function and / or an output a warning and / or warning signal in particular for the driver to be used.
- an angular offset between at least two set beam directions of a half-width can correspond to at least one of the diffracted transmission signals.
- a dense array of diffracted transmission signals can be generated. This allows a more efficient sampling of the monitored area.
- the transmission energies of the main lobes and / or the side lobes of the at least two beam directions add up.
- an angular offset between at least two set beam directions may be predetermined such that respective envelopes of the diffracted transmission signals overlap.
- an angular offset can be predetermined depending on a wavelength of the light generating the transmission signals.
- an angular offset between two set beam directions between about 15 ° and 25 °, in particular about 22 °, amount.
- overall a total opening angle of the field of view of the transmitting device and thus of the detection system can be increased.
- a total opening angle of 66 ° and more and with six diffraction units a total opening angle of 132 ° and more, in particular 154 °, can be achieved.
- a single opening angle, within which a beam direction can be adjusted, in particular pivoted, can be in the respective signal path behind at least one diffraction unit approximately between 15 ° and 25 °, in particular 22 °.
- an angular offset between two set beam directions can be approximately of the order of magnitude which corresponds to an aperture angle for at least one of the beam directions. In this way, a better overlap of the diffracted transmission signals can take place.
- At least one angular offset can be realized by means of a spatial arrangement of at least one diffraction unit and / or at least one light source.
- a corresponding spatial arrangement of the components involved can be easily mounted and / or adjusted.
- At least two mutually inclined light sources can be provided, with which transmission signals can be emitted whose respective beam directions are inclined at an angle offset to each other. This way you can the angular offset in the radiation path in front of the at least one diffraction unit can be realized.
- At least two diffraction units can be provided with which at least two jet directions inclined at an angle to each other can be adjusted.
- At least one beam alignment device can comprise or consist of at least one polarized beam splitter and / or at least one prism arrangement.
- a polarizing beam splitter With a polarizing beam splitter, set beam directions coming from different directions can be aligned by respectively linearly polarized transmission signals into the surveillance area.
- the at least one beam alignment device may have at least one different type of component, in particular a prism arrangement or the like. With a prism arrangement set beam directions can be aligned.
- At least one prism arrangement can have different prism sections, with each of which a set beam direction can be aligned.
- the prism sections can be designed to align the beam directions taking into account the angular offset.
- At least one diffraction unit can have or consist of an optical phased array.
- OPA optical phased array
- the phase of light waves can be controlled, which is transmitted through a two-dimensional surface of adjustable surface elements or reflected at this.
- the light can be diffracted to adjust a beam direction of transmission signals that have the form of light waves.
- the diffraction by means of an OPA can be done with lower energy losses than a reflection on a known particular micromechanical mirror.
- the control of the beam direction with an OPA can be based on the Huygens Fresnel principle.
- an arbitrary waveform is generated by superposing a number of spherical secondary waves. With an OPA such secondary waves can be generated and controlled. In this case, an amplitude and / or a phase of the spherical secondary waves can be modified.
- At least one diffraction unit can be designed and / or arranged to be reflective, transmissive or emitting with respect to the at least one transmission signal.
- a reflective arrangement lower energy losses than in a transmissive embodiment can be realized.
- a reflective arrangement can also be realized more compactly.
- At least one transmission signal striking at least one diffraction unit can be circularly polarized. In this way, in particular when using an OPA as a diffraction unit, a diffraction efficiency can be improved.
- At least one diffracted transmission signal striking at least one beam-alignment device can be linearly polarized.
- the diffracted transmission signal in particular when using a polarizing beam splitter as a beam-alignment device, can be aligned in a more targeted manner while maintaining or generating an angular offset in the monitoring area.
- the at least one diffracted transmission signal or the different diffracted transmission signals which strike at least one beam alignment device on the at least two signal paths can be obliquely, in particular perpendicular, linearly polarized relative to one another.
- diffracted transmission signals coming from different directions onto the at least one beam alignment unit can experience different deflection to the respective alignment into the monitoring area.
- one of the diffracted transmission signals can be guided in a straight path through the at least one beam alignment device and transmitted to the surveillance area.
- the corresponding other transmission signal can come from another direction with the at least one beam alignment device deflected accordingly and also be aligned in the surveillance area.
- the diffracted transmission signals in the radiation path behind the at least one beam alignment device can thus be distinguished or achieve different effects.
- the corresponding transmit signals can also be received as differently polarized receive signals and processed accordingly.
- At least one component which changes a polarization of the corresponding transmission signal in particular a ⁇ / 4 plate, can be arranged.
- the corresponding polarization-changing component With the corresponding polarization-changing component, the polarization type and / or the polarization directions of the transmission signal can be changed.
- a linear polarization of a transmission signal can be converted into a circular polarization.
- the transmission signals having a circular polarization can achieve a better diffraction efficiency with the at least one diffraction unit.
- the circular polarization of the diffracted transmission signal can be converted into a linear polarization.
- the transmission signal behind the polarization-changing component in particular a polarizing beam splitter can be supplied and directed accordingly.
- a generated with a light source linearly polarized transmission signal can be deflected via a polarizing beam splitter according to its polarization direction and sent after conversion with the polarization-changing device to the at least one diffraction unit.
- the circularly polarized diffracted transmission signal with the polarization-changing component can be transformed into a linearly polarized diffracted transmission signal with an oblique, in particular vertical, linear polarization direction oblique to the original linear polarization direction. be formed.
- the linearly polarized diffracted transmission signal can thus be conducted in a different way through the polarizing beam splitter as the linearly polarized transmission signal originally coming from the light source.
- At least one polarization-changing component can be realized as a retardation plate, in particular ⁇ / 4 plates. In this way, the polarization of transmission signals can be changed by simple means.
- At least one polarization-changing component, at least one optical lens and / or at least one beam-deflecting component, in particular a prism, can be combined in a single, in particular optical element. In this way, a material and / or assembly costs can be reduced.
- At least one light source, at least one polarizing beam splitter, at least one polarization-altering component and at least one diffraction unit can be designed as a module.
- Several such modules can be combined with each other.
- at least one diffracted transmission signal can be output, the beam direction of which can be changed, in particular pivoted, by means of the respective at least one diffraction unit.
- the set beam directions of the transmission signals of the two modules can be aligned with the at least one beam alignment device in the monitoring area.
- At least one polarizing beam splitter can be arranged in a respective signal path between the at least one light source and the at least one diffraction unit. In this way, at least one linearly polarized transmission signal coming from the light source can be conducted via the polarized beam splitter to the at least one diffraction unit. The transmission signal diffracted by the at least one diffraction unit can be conducted with the at least one polarizing beam splitter in another way into the surveillance area.
- At least one signal path before and / or behind at least one diffraction unit and optionally before and / or at least one beam-deflecting component, in particular at least one prism, can be arranged behind at least one polarization-changing component.
- a beam direction of a transmission signal coming from the light source can be aligned with the at least one diffraction unit.
- At least one set beam direction of a diffracted transmission signal can be aligned, in particular in the surveillance area.
- the beam deflecting device may be arranged with respect to a reflective diffraction unit both in the signal path of the incoming transmission signal and the diffracted transmission signal. In this way, with the beam-deflecting component, the at least one incoming transmission signal can be aligned with the at least one diffraction unit and the transmission signal, which is diffracted by the at least one diffraction unit, can be aligned in particular into the monitoring area.
- At least one optical lens can be arranged in at least one signal path in front of and / or behind at least one diffraction unit.
- the transmission signal can be focused on an active surface of the diffraction unit. Accordingly, with an optical lens behind the at least one diffraction unit, the transmission signal can be correspondingly shaped.
- the at least one optical lens may be arranged with respect to a reflective diffraction unit both in the signal path of the upcoming transmission signal and the diffracted transmission signal. In this way, with the at least one optical lens, the at least one incoming transmission signal can be focused on the at least one diffraction unit and the transmission signal diffracted by the at least one diffraction unit can be correspondingly adapted.
- the technical problem is solved according to the invention in the detection system in that at least one diffraction unit is arranged in at least two different signal paths of a transmission signal or different transmission signals, said transmission unit being adjustable for setting the beam directions belonging to the respective signal paths,
- At least one beam alignment device is arranged for aligning the set beam directions in the at least one monitoring area
- At least one diffraction unit is arranged in at least two different signal paths of a transmission signal or different transmission signals, said transmission unit being adjustable for setting the beam directions belonging to the respective signal paths,
- At least one beam alignment device is arranged for aligning the set beam directions in the at least one monitoring area
- a transmission signal or different transmission signals are transmitted in at least two different signal paths to at least one diffraction unit
- At least one angular offset is generated before or after the at least one diffraction unit between the set beam directions.
- at least one angular offset between the at least two beam directions can be predetermined so that respective envelopes of the diffracted transmission signals overlap. In this way, an opening angle of the total field of view of the monitoring system for monitoring the surveillance area can be increased.
- FIG. 1 shows a motor vehicle with a driver assistance system and a scanning optical detection system for monitoring a monitoring area in the direction of travel in front of the motor vehicle;
- FIG. 2 shows the motor vehicle and the monitoring area from FIG. 1 in FIG.
- FIG. 3 shows a functional representation of the motor vehicle with the driver assistance system and the detection system from FIG. 1;
- FIG. 4 shows a transmitting device of the detection system from FIGS. 1 to 3 according to a first exemplary embodiment
- FIG. 5 shows an amplitude-angle diagram of a transmission signal laser beam generated by a module of the transmission device from FIG. 4;
- Figure 6 is an amplitude-angle diagram of two superimposed transmit-signal laser beams generated by two modules of the transmitter of Figure 4;
- FIG. 7 shows amplitude-angle diagrams of the individual transmitted-signal laser beams and of the resulting transmitted-signal laser beam from FIG. 6;
- Figure 9 shows the transmitting device of Figure 8 in plan view
- FIG. 10 shows the transmitting device from FIGS. 8 and 9 in cross section
- Figure 1 1 is a detailed view of a prism arrangement of the transmitting device from the
- FIGS. 8 to 10 are identical to FIGS. 8 to 10;
- Figure 12 is an amplitude-angle diagram of three superimposed transmit-signal laser beams generated by the transmitter of Figure 4;
- FIG. 13 shows amplitude-angle diagrams of the individual transmitted-signal laser beams and of the resulting transmitted-signal laser beam from FIG. 12;
- FIG. 14 shows a transmission device according to a third exemplary embodiment, which is similar to the transmission devices from FIGS. 4 and 8 to 10 and which can be used for the detection system from FIGS. 1 to 3;
- FIG. 15 shows an amplitude-angle diagram of six superposed transmit-signal laser beams which are generated by two modules of the transmission device from FIG.
- FIG. 1 shows a motor vehicle 10 in the form of a passenger car in front view.
- FIG. 2 shows the motor vehicle 10 in plan view.
- the motor vehicle 10 has a scanning optical detection system 12 by way of example in the form of a laser scanner.
- the detection system 12 is arranged by way of example in the front bumper of the motor vehicle 10.
- the detection system 12 With the detection system 12, a For example, in the figures 2 and 3 indicated monitoring area 14 in the direction of travel 16 in front of the motor vehicle 10 are monitored for objects 18 out.
- the detection system 12 can also be arranged elsewhere on the motor vehicle 10 and aligned differently.
- the objects 18 may, for example, be other vehicles, persons, obstacles, road bumps, for example potholes or stones, roadway boundaries or the like.
- an object 18 is indicated by way of example as a checkered rectangle.
- FIG. 3 is otherwise merely a functional diagram of some components of the motor vehicle 10 and of the detection system 12, which does not serve the spatial orientation.
- the detection system 12 operates according to a light pulse transit time method. With the detection system 12, for example, a distance, a direction and a speed of the object 18 relative to the motor vehicle 10 can be determined.
- the detection system 12 is part of or may be connected to a driver assistance system 20.
- a driver of the motor vehicle 10 can be supported.
- the motor vehicle 10 can at least partially drive or park autonomously with the aid of the driver assistance system 20.
- driving functions of the motor vehicle 10 for example a motor control, a brake function or a steering function can be influenced or instructions or warning signals can be output.
- the driver assistance system 20 is connected to functional devices 22 in a regulating and / or controlling manner. In FIG. 3, two functional devices 22 are shown by way of example.
- the functional devices 22 may be, for example, an engine control system, a brake system, a steering system, a chassis control or a signal output system.
- the driver assistance system 20 has an electronic control device 24 with which corresponding electronic control and regulating signals can be transmitted to the functional devices 22 and / or received and processed by them.
- the detection system 12 comprises a transmitting device 26, a receiving device 28 and an electronic control and evaluation device 30.
- the transmitting device 26 pulsed optical transmission signals 32 in the monitoring area 14th be sent.
- the transmit signals 32 are reflected at the object 18 and sent back to the detection system 12 as correspondingly pulsed optical receive signals 34. From the time of light, ie from the time between the transmission of the transmission signal 32 and the reception of the corresponding reception signal 34, the distance of the object 16 is determined with the electronic control and evaluation device 30.
- the control and evaluation device 30 is signal technically connected to the control device 24. With the control device 24, depending on object information of the detection system 12, driving functions of the motor vehicle 10 can be controlled / regulated. For the invention, it is not essential whether electrical control and / or evaluation devices, such as the control device 24, the control and evaluation device 30, an engine control unit of the motor vehicle 10 or the like, integrated in one or more components or groups of components or at least partially decentralized components or component groups are realized.
- the transmitting device 26 is shown schematically according to a first embodiment.
- FIGS. 1, 2 and 4 respective coordinate axes of a Cartesian x-y-z coordinate system are shown.
- the transmitting device 26 comprises two modules 36a and 36b and a beam-alignment device 38 in the form of a polarizing beam splitter.
- a correspondingly first transmission signal 32a is transmitted.
- a corresponding second transmission signal 32b is emitted.
- the transmission signals 32a and 32b are matched to one another and thus form in total the transmission signal 32 emitted by the transmission device 26.
- the first module 36a comprises a light source 40a in the form of a laser. With the light source 40a transmission signals 32a are emitted.
- a signal path 41a of the transmission signals 32a includes a polarizing beam splitter 42b, a prism arrangement 44a, a polarization-changing component in the form of a ⁇ / 4 plate 46a, an optical lens 48a and a diffractive diffraction unit, for example in the form of an optical phased array (OPA) 50a arranged.
- OPA optical phased array
- a signal path 41 b the transmission signals 32b of a laser light source 40b of the second module 36b, a polarizing beam splitter 42b, a prism assembly 44b, a ⁇ / 4 plate 46b, an optical lens 48b, and an OPA 50b.
- the signal paths 41 a and 41 b are the paths taking the respective transmission signals 32 a and 32 b from the respective light sources 40 a and 40 b to the monitoring area 14.
- the first module 36a will first be described in more detail below.
- the laser 40a is located, for example, above a pivoting plane 52.
- the transmission signal 32a emitted by the laser 40a in the form of a laser beam is changed in a pivoting direction 56 by changing its beam direction 66a, as indicated in FIG pivoted to optically scan the monitoring area 14 back and forth.
- the pivot plane 52 runs by way of example horizontally, parallel to the x-y plane.
- In the pivot plane 52 extends an imaginary main axis 74 of the transmitting device 26.
- the main axis 74 extends parallel to the x-axis.
- the light source 40a is oriented such that the pulsed, linearly polarized laser beam produced by it is directed, for example, perpendicular to the pivoting plane 52 with a beam direction 58a.
- the polarization direction 60a of the transmission signal 32a is initially oriented horizontally by way of example.
- the horizontal polarization direction 60a is indicated in FIG. 4 by a double arrow.
- the horizontal polarization direction 60 a is aligned, for example, parallel to the main axis 74 of the transmission device 26.
- the transmission signal 32a with the beam direction 58a strikes an input side of the beam splitter 42a and, because of its horizontal polarization direction 60a, is deflected by 90 ° away from the monitoring region 14.
- the prism arrangement 44a, the ⁇ / 4 plate 46a and the OPA 50a are arranged in succession.
- the deflected transmit signal 32a with the beam direction 62a passes through the prism array 44a and passes through the ⁇ / 4 plate 46a. With the ⁇ / 4 plate 46a, the horizontal polarization direction 60a is converted into an exemplary right-hand circular polarization direction 60a. Transformation direction 64a transformed, which is indicated in the figure 4 by a corresponding circular curved arrow. The transmission signal 32a with the right circular polarization direction 64a is focused with the lens 48a on the OPA 50a.
- the OPA 50a is exemplarily operated in reflection. As is known, by means of the OPA 50a, by controlling the phase of the transmission signal 32a in the form of a light wave, a beam direction 54a of the transmission signal 32a diffracted by the OPA 50a can be adjusted. By appropriately driving the OPA 50a, the transmission signal 32a is swiveled back and forth with the set beam direction 66a in the pivot plane 52.
- the reflected transmission signal 32a is sent back to the lens 48a with the correspondingly adjusted beam direction 66a.
- the beam direction 66a is referred to as "set beam direction 66a.”
- the polarization direction is reversed so that the transmission signal 32a having the set beam direction 66a has a left circular polarization direction 68a in the figure 4 indicated by a corresponding circularly curved arrow.
- the transmission signal 32a with the set beam direction 66a passes through the lens 48a to the ⁇ / 4 plate 46a.
- the left circular polarization direction 68a of the transmission signal 32a is converted into a vertical linear polarization direction 70a.
- the vertical polarization direction 70a is oriented perpendicular to the horizontal polarization direction 60a, parallel to the z-axis.
- the transmission signal 32a with the set beam direction 66a and the vertical polarization direction 70a passes to the polarizing beam splitter 42a.
- the polarizing beam splitter 42a is straight-through from the corresponding exemplary first input side for the transmission signal 32a with the set beam direction 66a and the vertical polarization direction 70a.
- the transmission signal 32a with the set beam direction 66a and the vertical polarization direction 70a leaves the first module 36a and reaches the beam alignment device 38 in the form of another polarizing beam splitter.
- the jet exhaust Direction device 38 is arranged in the signal path 41 a of the transmission signal 32 a of the first module 36 a. With the beam alignment device 38, the transmission signal 32a is aligned with the set beam direction 66a and the vertical polarization direction 70a in a straight path in the monitoring area 14.
- FIG. 5 shows a schematic amplitude-angle diagram of an adjusted transmission signal 32a, which is diffracted by way of example on the OPA 50a.
- the incoming transmit signal 32a is diffracted with the beam direction 58a of adjustable diffraction elements such that a portion of the transmit energy of the transmit signal 32a in a main lobe 72H and a portion of the energy of the transmit signal 32a in sidelobes 72N is transmitted into the monitor area 14.
- the main lobe 72H and the sidelobes 72N are surrounded by an envelope 76a.
- the modules 36a and 36b are identical in their construction and operation.
- the second module 36b is pivoted 90 ° down from the light source 40a with respect to the first module 36a with respect to the beam pointing device 38.
- the linear polarization direction 70b of the transmission signal 32b emerging from the second light source 40b is aligned with the beam direction 58b perpendicular to the horizontal polarization direction 60a of the corresponding transmission signal 32a with the beam direction 58a of the first light source 40a, ie vertically.
- the polarization direction 60b of the diffracted transmission signal 32b with the set beam direction 66b of the second module 36b perpendicular to the vertical polarization direction 70a of the diffracted transmission signal 32a is aligned with the set beam directions 66a of the first module 36a, ie horizontally.
- the beam alignment device 38 is arranged in the signal path 41b of the transmission signals 32b of the second module 36b.
- the diffracted transmission signal 32b with the set signal direction 66b of the second module 36b is directed to the second input side of the beam alignment device 38a and with this polarization dependent while maintaining the horizontal polarization direction 60b by 90 ° from the first module 36a away in the pivot plane 52 and so into the Monitor area 14 aligned.
- the first module 36a, the second module 36b and the beam alignment device 38 are arranged such that a set beam direction 66a of the diffracted transmission signal 32a of the first module 36a and a set beam direction 66b of the diffracted transmission signal 32b of the second module 36b have an angular offset as indicated in FIG 78 in the pivot plane 52 have.
- the angular offset 78 is selected to overlap the main lobes 72H of the diffracted transmit signal 32a and the main lobe 72H of the diffracted transmit signal 32b, thus adding the transmit energies accordingly.
- the angular offset 78 corresponds to a half width of the envelope 76a of the diffracted transmission signal 32a of the first module 36a.
- the half width of the envelope 76a preferably corresponds to the half width of the envelope 76b of the diffracted transmit signal 32b of the second module 36b.
- the angular offset 78 in the embodiment shown is 22 °.
- a total opening angle 80 indicated in FIG. 2, of a total field of view of the detection system 12 in the pivoting plane 52 is further increased overall.
- the total field of view of the detection system 12 is composed of the superposition of the individual fields of view of the modules 36a and 36b. Accordingly, the total opening angle 80 is formed from the individual opening angles 82 of the modules 36a and 36a.
- the individual fields of view are defined by the individual aperture angles 82 within which the adjusted beam directions 66a and 66b are respectively pivoted back and forth.
- the diffracted transmission signal 32a of the first module 36a and the diffracted transmission signal 32b of the second module 36b are different linearly polarized, the corresponding reception signals on the receiver side are distinguishable from each other.
- the diffracted transmission signals 32a and 32b are shown in an amplitude-angle diagram by way of example in a phase of pivoting the set beam directions 66a of the first module 36a and 66b of the second module 36b.
- the beam direction 66a of the diffracted transmission signal 32a is inclined at an angle of 11 ° with respect to the main axis 74, which is at 0 °.
- the beam direction 66b of the diffracted transmission signal 32b is opposite by an angle of -1 1 ° the main axis 74 inclined.
- the envelope 76a of the diffracted transmit signal 32a of the first module 36a and the envelope 76b of the diffracted transmit signal 32b of the second module 36b are surrounded by a total envelope 84 of the total transmit signal 32.
- the modules 36a and 36b each have a single opening angle 82 of about 22 °.
- FIG. 7 shows in the swivel phase according to FIG. 6 in an amplitude-angle diagram above the diffracted transmission signal 32a of the first module 36a, in the middle the diffracted transmission signal 32b of the second module 36b and below the overall transmission signal 32 as superimposition of the both diffracted transmission signals 32a and 32b.
- the main lobe 72H of the diffracted transmit signal 32a and the main lobe 72H of the diffracted transmit signal 32b are transmitted into the monitor area 14 at the same angle with respect to the major axis 74, by way of example at 0 °. Due to the superposition of the diffracted transmit signals 32a and 32b, the signal energy of the total transmit signal 32 is doubled at said angle.
- FIGS. 8 to 10 show a transmitting device 126 consisting of a module 136 for a detection system 12 according to a second exemplary embodiment. Those elements which are similar to those of the first embodiment of Figures 1 to 7, are given the same reference numerals plus 100. In contrast to the first exemplary embodiment from FIGS. 1 to 7, the module 136 has three light sources 140a, 140b and 140c and three corresponding OPAs 150a, 150b and 150c.
- the light sources 140a, 140b and 140c are each configured as a laser.
- the light sources 140a, 140b, and 140c are exemplified, as shown in FIG. 8, above the pivot plane 52 and the main axis 174 of the transmitter 126.
- respective transmit signals 132a, 132b, and 132c are pulsed , horizontally linearly polarized laser beams are generated and sent in respective beam directions 158a, 158b and 158c.
- the horizontal polarization direction 160 is aligned parallel to the main axis 174 of the transmitting device 126 and indicated in the figure 8 double arrows.
- the light sources 140a, 140b, and 140c are arranged and aligned such that the respective beam directions 158a, 158b, and 158c are in a common plane when viewed perpendicular to the main axis 174.
- the respectively adjacent beam directions 158a, 158b and 158c are directed at a polarization beam splitter 142 at an angular offset 178 in such a way that they intersect at a common point of intersection. Due to the corresponding spatial orientation of the light sources 140a, 140b and 140c, a total of three different signal paths 141a, 141b and 141c are realized for the corresponding transmit signals 132a, 132b and 132c.
- the angular displacement 178 is maintained on the signal paths 141 a, 141 b, and 141 c of the transmission signals 132 a, 132 b, and 132 c from the respective light sources 140 a, 140 b, and 140 c to the monitoring area 14.
- the angular offset 178 is for example about 22 °.
- the angular misalignment 178 is achieved by the arrangement of the light sources 140a, 140b and 140c in the corresponding inclination by mechanical means.
- the beam directions 158a, 158b and 158c are deflected while maintaining their angular offset 178 with the beam splitter 142 by 90 ° parallel to the main axis 174 of the monitoring area 1 14 away to a prism array 144 toward.
- the prism assembly 144 is shown in detail in FIG.
- the prism assembly 144 has two outer prism portions 144a and 144c and one inner prism portion 144b.
- the plane side of the prism arrangement 144 facing away from the beam splitter 142 extends over all three prism sections 144a, 144b and 144c and extends perpendicularly to the main axis 174.
- the outer prism sections 144a and 144c are symmetrically designed and arranged.
- the planar sides of the outer prism sections 144a and 144c, which face the beam splitter 142, each extend perpendicular to the xy plane and at a prism angle ⁇ obliquely to the side facing away from the beam splitter 142 of the prism array 144.
- the plane side of the inner facing the beam splitter 142 Prismaabitess 144b is parallel to the beam splitter 142 facing away from the flat side.
- the two outer transmission signals 132a and 132c with the beam directions 158a and 158c respectively hit one of the outer prism portions 144a and 144c.
- the central transmission signal 132b with the beam direction 158b strikes the inner prism section 144b.
- the transmit signals 132a and 132c are respectively refracted with the beam directions 158a and 158c so that the beam directions 158a and 158c behind the prism array 144 are parallel to each other and to the corresponding OPAs 150a and 150c are directed.
- the offset angle ⁇ corresponds to the angular offset 178
- ni is the refractive index for air, which is approximately 1
- n 2 is the refractive index of the prism material, by way of example 1, 5.
- the result is a prism angle ⁇ of about 33 °.
- the transmit signals 132a, 132b and 132c pass through the prism arrangement 144 on their respective signal paths 141a, 141b and 141c respectively a respective ⁇ / 4-plate 146, with which in a known manner the horizontal polarization direction 160 is transformed into right circular polarization directions 164.
- the right circularly polarized transmit signals 132a, 132b and 132c are focused by a respective optical lens 148a, 148b and 148c onto the respective OPA 150a, 150b and 150c.
- the OPAs 150a, 150b and 150c are in a common plane that extends perpendicular to the main axis 174.
- the transmission signals 132a, 132b and 132c are controlled analogously to the first embodiment and their beam directions 158a, 158b and 158c in the pivot plane 152 and swung her.
- the pivot plane 152 is located in FIG. 10 by way of example in the drawing plane.
- the right circular polarization directions 164 are transformed into left circular polarization directions 168.
- the left circular polarization directions 168 are converted into vertical linear polarization directions 170.
- the diffracted transmission signals 132a, 132b and 132c pass through the respectively corresponding prism sections 144a, 144b and 144c and are aligned with the monitoring zone 14 while maintaining the angular offset 178.
- the prism assembly 144 thus acts as a beam aligner for the adjusted beam directions 166a, 166b and 166c.
- the control of the OPAs 150a, 150b, and 150c causes the controlled beam directions 166a, 166b, and 166c to respectively pivot within a respective single field of view with a respective single aperture angle 182a, 182b, and 182c.
- the diffracted transmission signals 132a, 132b and 132c with vertical polarization direction 170 pass through the beam splitter 142 in a straight line while maintaining the angular offset 178 in the pivot plane 52.
- Behind the beam splitter 142 arises due to the superposition of the individual fields of view of the individual diffracted transmission signals 132a, 132b and 132c a total field of view with a total opening angle 180 for the detection system 1 12, which is significantly larger than the individual fields of view with the individual opening angles 182a, 182b and 182c.
- FIG. 12 shows an amplitude-angle diagram with the envelopes 176a, 176b and 176c of the diffracted transmission signals 132a, 132b and 132c. It can be seen from FIG. 12 that the beam directions 166a and 166b and the beam directions 166b and 166c are each offset by the angular offset 178 of 22 °, which corresponds to the half-width of the respective ligen envelopes 176a, 176b and 176c, are inclined to each other. The superimposition of the envelopes 176a to 176c of the diffracted transmit signals 132a, 132b and 132c results in a total envelope 184 for the total transmit signal 132 sent into the monitor area 14.
- FIG. 13 shows, in corresponding amplitude-angle diagrams in an exemplary pivoting phase of the transmission device 26 above, the transmission signal 132b generated by the second light source 140b and diffracted by the second OPA 150b, in second the one generated by the first light source 140a and by the first OPA 150a diffracted transmit signal 132a, in third the generated with the third light source 140b and diffracted with the third OPA 150c transmission signal 1 32c and below the total transmission signal 132 as a superposition of the three diffracted transmission signals 132a, 132b and 132c.
- one of the lobes 172b of the second diffracted transmit signal 132b and one of the lobes 172a of the first diffracted transmit signal 132a at the same angle with respect to the major axis 174, for example at an angle of 1 1 °, in the monitoring area 1 14th Posted.
- the other lobe 172b of the second diffracted transmit signal 132b and one of the lobes 172c of the third diffracted transmit signal 132c are transmitted into the monitor area 14 at the same angle with respect to the main axis 174, by way of example at -1 -1 °. Due to the superimposition of the diffracted transmit signals 132a and 132b or 132b and 132c, the signal energy of the total transmit signal 132 is doubled at said angles.
- FIG. 14 shows a transmission device 226 according to a third exemplary embodiment.
- the transmission device 226 according to the third exemplary embodiment has a similar construction to the transmission device 26 according to the first embodiment from FIGS. 1 to 7, with the difference that instead of the two modules 36a and 36b, two modules 136a and 136b are used which correspond to the module 136 of FIG second embodiment of Figures 8 to 13 correspond.
- the transmitting device 226, a total of six separate signal paths can be realized, of which in FIG. 14, for example, only the signal path 141a is designated for each module 136a and 136b.
- the signals from the first module 136a are combined. with the three set beam directions, of which only the beam direction 166a is shown in FIG. 14, on three separate signal paths, of which only the signal path 141 in FIG a is aligned in the pivoting plane 152 in a straight path while maintaining its vertical polarization direction 170 in the monitoring area 1 14.
- the diffracted horizontally polarized transmission signals 132b-a, 132b-b and 132b-c coming from the second module 136b with the three set beam directions, of which only the beam direction 166a is shown in FIG. 14, are deflected by 90 ° into the pivot plane 152 and on three separate signal paths 141 b are also aligned in the monitoring area 1 14, while maintaining their horizontal polarization direction 170.
- an amplitude-angle diagram is shown with the envelopes 176a-a, 176a-b and 176a-c of the diffracted transmit signals 132a-a, 132a-b and 132a-c of the first module 136a and the envelopes 176b-a, 176b-b and 176c-c of the diffracted transmit signals 132b-a, 132b-b and 132b-c of the second module 136b.
- the respective adjacent ones of the diffracted transmit signals 132a-a, 132a-b, 132a-c, 132b-a, 132b-b, and 132b-c are offset by the angular offset 178 of 22 ° which corresponds to the half-width of the respective envelope 176a-a, 176a. b, 176a-c, 176b-a, 176b-b, 176c-c are inclined to each other.
- the set beam directions 166a-a, 166a-b and 166a-c of the first module 136a are thus inclined to each other by the angular offset 178 as in the second embodiment of Figures 8 to 13.
- the adjusted beam directions 166b-a, 166b-b and 166b-c of the second module 136a are inclined relative to one another by the angular offset 178.
- the set of beam directions 166b-a, 166b-b and 166b-c of the second module 136a is inclined by 66 ° with respect to the set of beam directions 166a-a, 166a-b and 166a-c of the first module 136a.
- the beam direction 166a-c of the first module 136a and the beam direction 166b-a of the second module 136b, which are adjacent, are likewise inclined relative to one another by the angular offset 178.
- the beam directions 166a-a, 166a-b, 166a-c, 166b-a, 166b-b and 166b-c of both modules 136a and 136b detect an angle of about 1 54 ° in total.
- ⁇ / 4 plates 46; 146, the prism assemblies 44; 144 and / or the optical lenses 48; 148 may each be combined in an example optical element.
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- General Physics & Mathematics (AREA)
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Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017116598.3A DE102017116598A1 (de) | 2017-07-24 | 2017-07-24 | Sendevorrichtung für ein abtastendes optisches Detektionssystem eines Fahrzeugs, Detektionssystem, Fahrerassistenzsystem und Verfahren zum optischen Abtasten eines Überwachungsbereichs |
| PCT/EP2018/069969 WO2019020591A1 (de) | 2017-07-24 | 2018-07-24 | Sendevorrichtung für ein abtastendes optisches detektionssystem eines fahrzeugs, detektionssystem, fahrerassistenzsystem und verfahren zum optischen abtasten eines überwachungsbereichs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3658948A1 true EP3658948A1 (de) | 2020-06-03 |
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| EP18745582.9A Pending EP3658948A1 (de) | 2017-07-24 | 2018-07-24 | Sendevorrichtung für ein abtastendes optisches detektionssystem eines fahrzeugs, detektionssystem, fahrerassistenzsystem und verfahren zum optischen abtasten eines überwachungsbereichs |
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| US (1) | US11644541B2 (de) |
| EP (1) | EP3658948A1 (de) |
| DE (1) | DE102017116598A1 (de) |
| WO (1) | WO2019020591A1 (de) |
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|---|---|---|---|---|
| DE102019101967A1 (de) * | 2019-01-28 | 2020-07-30 | Valeo Schalter Und Sensoren Gmbh | Empfangseinrichtung für eine optische Messvorrichtung zur Erfassung von Objekten, Lichtsignalumlenkeinrichtung, Messvorrichtung und Verfahren zum Betreiben einer Empfangseinrichtung |
| DE102019101968A1 (de) * | 2019-01-28 | 2020-07-30 | Valeo Schalter Und Sensoren Gmbh | Sendeeinrichtung für eine optische Messvorrichtung zur Erfassung von Objekten, Lichtsignalumlenkeinrichtung, Messvorrichtung und Verfahren zum Betreiben einer Sendeeinrichtung |
| DE102019101966A1 (de) * | 2019-01-28 | 2020-07-30 | Valeo Schalter Und Sensoren Gmbh | Positionserfassungseinrichtung für eine Lichtsignalumlenkeinrichtung einer optischen Messvorrichtung zur Erfassung von Objekten, Lichtsignalumlenkeinrichtung, Messvorrichtung und Verfahren zum Betreiben einer Positionserfassungseinrichtung |
| DE102021131351A1 (de) | 2021-11-30 | 2023-06-01 | Valeo Schalter Und Sensoren Gmbh | Verfahren zum Betreiben eines LiDAR-Systems, LiDAR-System und Fahrzeug mit wenigstens einem LiDAR-System |
| CN117554981A (zh) * | 2022-08-04 | 2024-02-13 | 鸿富锦精密工业(深圳)有限公司 | 激光探测系统及车辆 |
| DE102022127122A1 (de) * | 2022-10-17 | 2024-04-18 | Bayerische Motoren Werke Aktiengesellschaft | LIDAR-System für ein Fahrassistenzsystem |
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| IT1284335B1 (it) * | 1996-01-24 | 1998-05-18 | Fiat Ricerche | Dispositivi a microspecchi e microfiltri per la selezione di colori ed immagini |
| US7205527B2 (en) * | 2003-12-09 | 2007-04-17 | Delphi Technologies, Inc. | Apparatus for fanning out near infrared radiation in an automotive occupant position restraint system |
| US7532311B2 (en) * | 2005-04-06 | 2009-05-12 | Lockheed Martin Coherent Technologies, Inc. | Efficient lidar with flexible target interrogation pattern |
| US8982313B2 (en) * | 2009-07-31 | 2015-03-17 | North Carolina State University | Beam steering devices including stacked liquid crystal polarization gratings and related methods of operation |
| US20130208256A1 (en) | 2012-02-10 | 2013-08-15 | Optical Air Data Systems, Llc. | LDV with Diffractive Optical Element for Transceiver Lens |
| US9476981B2 (en) * | 2013-01-08 | 2016-10-25 | Massachusetts Institute Of Technology | Optical phased arrays |
| US10126412B2 (en) | 2013-08-19 | 2018-11-13 | Quanergy Systems, Inc. | Optical phased array lidar system and method of using same |
| US20160097930A1 (en) * | 2014-10-06 | 2016-04-07 | Steven John Robbins | Microdisplay optical system having two microlens arrays |
| DE102014223900A1 (de) * | 2014-11-24 | 2016-05-25 | Conti Temic Microelectronic Gmbh | Fahrzeug-Umfeld-Abtastung mittels eines phasengesteuerten Lasers |
| US10197676B2 (en) * | 2015-04-28 | 2019-02-05 | Qualcomm Incorporated | Solid-state electronic light detection and ranging (LIDAR) |
| US10527726B2 (en) * | 2015-07-02 | 2020-01-07 | Texas Instruments Incorporated | Methods and apparatus for LIDAR with DMD |
| TWI570674B (zh) * | 2015-12-17 | 2017-02-11 | 合盈光電科技股份有限公司 | 交通運輸工具之影像偵測系統 |
| DE102015226460A1 (de) * | 2015-12-22 | 2017-06-22 | Robert Bosch Gmbh | LIDAR-Abtasteinrichtung und LIDAR-Abtasteinrichtungssystem |
| WO2017126386A1 (ja) * | 2016-01-22 | 2017-07-27 | 国立大学法人横浜国立大学 | 光偏向デバイスおよびライダー装置 |
| WO2018176115A1 (en) * | 2017-03-31 | 2018-10-04 | Huawei Technologies Co., Ltd. | Apparatus and method for scanning and ranging with eye-safe pattern |
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2018
- 2018-07-24 WO PCT/EP2018/069969 patent/WO2019020591A1/de not_active Ceased
- 2018-07-24 US US16/632,713 patent/US11644541B2/en active Active
- 2018-07-24 EP EP18745582.9A patent/EP3658948A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019020591A1 (de) | 2019-01-31 |
| US11644541B2 (en) | 2023-05-09 |
| US20210165080A1 (en) | 2021-06-03 |
| DE102017116598A1 (de) | 2019-01-24 |
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