WO2018071043A1 - Optoelectronic system and lidar systems - Google Patents

Optoelectronic system and lidar systems Download PDF

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Publication number
WO2018071043A1
WO2018071043A1 PCT/US2016/057129 US2016057129W WO2018071043A1 WO 2018071043 A1 WO2018071043 A1 WO 2018071043A1 US 2016057129 W US2016057129 W US 2016057129W WO 2018071043 A1 WO2018071043 A1 WO 2018071043A1
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WO
WIPO (PCT)
Prior art keywords
light
laser
optical device
optoelectronic system
light detector
Prior art date
Application number
PCT/US2016/057129
Other languages
French (fr)
Inventor
Rolf Weber
Original Assignee
Osram Opto Semiconductors Gmbh
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 Osram Opto Semiconductors Gmbh filed Critical Osram Opto Semiconductors Gmbh
Priority to PCT/US2016/057129 priority Critical patent/WO2018071043A1/en
Publication of WO2018071043A1 publication Critical patent/WO2018071043A1/en

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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
    • 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
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • 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
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G01S7/4812—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver transmitted and received beams following a coaxial path
    • 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
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G01S7/4813—Housing arrangements

Definitions

  • the present invention relates to an optoelectronic system and to a lidar system comprising an optoelectronic system.
  • Lidar systems for measuring a distance to a target are known in the state of the art. Lidar systems shoot short pulses of light towards the target. The light gets reflected by the target and is detected by the lidar system. The time elapsed between the light transmission and the light detection is proportional to the distance of the target.
  • an optoelectronic system comprises a light detector, a laser and an optical device arranged one after another along an optical axis of the optoelectronic system.
  • the laser is adapted for emitting light along the optical axis in a direction towards the optical device away from the light detector.
  • the optical device is adapted for collimating light.
  • the light detector comprises a detection face adapted for detecting light emitted by the laser. The detection face is arranged perpendicular to the optical axis.
  • the laser and the light detector of this optoelectronic system may have a fixed relative positioning and distance. This allows aligning the laser and the light detector with the optical device of the optoelectronic system together in only one single alignment step. Advantageously, this simplifies the assembly of the optoelectronic system and reduces a risk of a misalignment of either the laser or the light detector of the optoelectronic system.
  • the optical device comprises an optical lens.
  • a radially inner section of the optical device comprises a first focal length.
  • a radially outer section of the optical device comprises a second focal length.
  • the second focal length is larger than the first focal length.
  • this allows using the same optical device of the optoelectronic system for shaping both light emitted by the laser of the optoelectronic system and incident light detected by the light detector of the optical system.
  • light emitted by the laser is collimated by the inner section of the optical device.
  • collimating the light emitted by the laser allows the optoelectronic system to create small -diameter light spots at large distances from the optoelectronic system.
  • the outer section of the optical device focuses incident collimated light onto the detection face of the light detector.
  • focusing incident light onto the detection face of the light detector allows the light detector to detect light originating from an extended light spot.
  • the light detector comprises a photodiode.
  • this allows for a cost-effective production of the light detector.
  • a first cylinder baffle is arranged between the laser and the optical device. Light emitted by the laser runs through the first cylinder baffle.
  • the first cylinder baffle prevents light emitted by the laser to advance directly to the light detector of the optoelectronic system. This ensures that only incident light from outside of the optoelectronic system is detected by the light detector.
  • the light detector, the laser and the optical device are arranged in a second cylinder baffle.
  • this second cylinder baffle ensures that only light incident on the optical device of the optoelectronic system from outside of the optoelectronic system is detected by the light detector of the optoelectronic system.
  • a third baffle is arranged between the laser and the light detector.
  • the third baffle prevents light escaping from backside of the laser to reach the light detector. This allows operating the laser at high power and ensures that the light detector of the optoelectronic system only detects light incident on the optical device from outside of the optoelectronic system.
  • a lidar system comprises an optoelectronic system as described above.
  • the assembly of the lidar system is simplified by being able to align the light detector and the laser of the optoelectronic system of the lidar system together relative to the optical device of the optoelectronic system.
  • Fig. l shows a sectional drawing of a lidar system comprising an optoelectronic system.
  • Fig. l shows a schematic sectional view of a lidar system to.
  • the lidar system to may be used to measure a distance to a target that is positioned at a distance from the lidar system to.
  • the lidar system to may for example be used for measuring distances in the order of tens, hundreds or thousands of meters.
  • the lidar system to may comprise additional components.
  • the lidar system to comprises an optoelectronic system 20.
  • the optoelectronic system 20 comprises a light detector too, a laser 200 and an optical device 300 arranged one after another along an optical axis 30 of the optoelectronic system 20.
  • the laser 200 is adapted for emitting light 210 in an emission direction 31 which is oriented parallel to the optical axis 30 of the optoelectronic system 20.
  • Light 210 emitted by the laser 200 may also be referred to as a laser beam.
  • Light 210 emitted by the laser 200 may for example comprise a wavelength in the infrared spectral range.
  • the laser 200 is adapted for emitting light 210 at an emission side 201 of the laser 200.
  • the laser 200 may for example comprise a semiconductor chip with an integrated laser diode.
  • the semiconductor chip of the laser 200 may be arranged in a housing.
  • the optical device 300 is adapted for collimating light 210 emitted by the laser 200.
  • the optical device 300 is an optical lens 305.
  • the optical device 300 may, however, comprise more than one optical lens and may also comprise additional optical components.
  • the optical device 300 is aligned on the optical axis 30 of the optoelectronic system 20 of the lidar system 10 and is arranged in front of the emission side 201 of the laser 200 such that light 210 emitted by the laser 200 in the emission direction 31 strikes the optical device 300.
  • the optical device 300 has a radially inner section 310 and a radially outer section 320. The inner section 310 of the optical device 300 is located closer to the optical axis 30.
  • the outer section 320 of the optical device 300 located further away from the optical axis 30. If the optical device 300 comprises only the optical lens 305, the inner section 310 and the outer section 320 are radial sections of the optical lens 305.
  • the radially inner section 310 comprises a first focal length 315.
  • the radially outer section 320 of the optical device 300 comprises a second focal length 325. The second focal length 325 is larger than the first focal length 315.
  • Light 210 is emitted by the laser 200 as divergent light 211. Divergent light 210, 211 emitted by the laser 200 in the emission direction 31 is incident on the radially inner section 310 of the optical device 300 and is collimated by the radially inner section 310 of the optical device 300. To this end, the optical device 300 and the laser 200 of the optoelectronic system 20 of the lidar system 10 are spaced at a distance that matches or is close to the first focal length 315 of the radially inner section 310. Light 210 incident on the optical device 300 is transmitted by the optical device 300 and leaves the optical device 300 as collimated light 210, 212 in the emission direction 31 along the optical axis 30 of the optoelectronic system 20.
  • the collimated light 210, 212 leaves the lidar system 10 and may be reflected back to the lidar system 10 as reflected light 210, 213 by an object in the environment of the lidar system 10.
  • the object may for example be located at a distance of some ten meters, some hundred meters or some thousand meters away from the lidar system 10.
  • the reflected light 210, 213 arriving at the lidar system 10 is collimated and appears to originate from an extended light source.
  • the reflected light 210, 213 arrives at the lidar system 10 in an incident direction 32 that is parallel to the optical axis 30 and opposed to the emission direction 31.
  • the reflected light 210, 213 is incident on the optical device 300 of the optoelectronic system 20 of the lidar system 10.
  • the light detector 100 of the optoelectronic system 20 of the lidar system 10 is adapted for detecting light comprising the wavelength of the light 210 emitted by the laser 200 of the optoelectronic system 20. Consequently, the light detector 100 is capable of detecting light 210 emitted by the laser 200.
  • the light detector 100 comprises a detection face 101. Light 210 incident on the detection face 101 of the light detector 100 is detected by the light detector 100.
  • the light detector 100 may for example comprise a photodiode 105.
  • the light detector 100 is positioned behind the laser 200 of the optoelectronic system 20 such that the detection face 101 of the light detector 100 is arranged perpendicular to the optical axis 30 and looks in the same direction as the emission side 201 of the laser 200. Consequently, the emission direction 31 in which light 210 is emitted by the laser 200 points away from the detection face 101 of the light detector 100.
  • the detection face 101 of the light detector 100 is centered around the optical axis 30.
  • Reflected light 210, 213 incident on the optical device 300 of the optoelectronic system 20 of the lidar system 10 is focused onto the detection face 101 of the light detector 100 by the outer section 320 of the optical device 300.
  • the detection face 101 of the light detector 100 is spaced apart from the optical device 300 by a distance that equals or approximately equals the second focal length 325 of the radially outer section 320 of the optical device 300. Focused light 210, 214 focused onto the detection face 101 of the light detector 100 is detected by the light detector 100.
  • the laser 200 of the optoelectronic system 20 of the lidar system 10 emits short pulses of light 210, for example pulses comprising a length of some nanoseconds.
  • the lidar system 10 measures the time passed between an emission of light 210, 211 by the laser 200 of the optoelectronic system 20 of the lidar system 10 and the detection of light 210, 214 by the light detector 100 of the optoelectronic system 20 of the lidar system 10. This time is proportional to the distance of the light reflecting object in the environment of the lidar system 10.
  • the lidar system 10 comprises a first cylinder baffle 410 arranged between the laser 200 and the optical device 300 of the optoelectronic system 20.
  • Light 210 emitted by the laser 200 runs towards the optical device 300 through the first cylinder baffle 410.
  • the incoming focused light 210, 214 runs from the optical device 300 to the light detector 100 outside the first cylinder baffle 410.
  • the first cylinder baffle 410 prevents light 210, 211 emitted by the laser 200 to arrive at the light detector 100 without being reflected on an object outside of the lidar system 10.
  • the optoelectronic system 20 of the lidar system 10 comprises a second cylinder baffle 420.
  • the light detector 100, the laser 200 and the optical device 300 are all arranged inside the second cylinder baffle 420.
  • the second cylinder baffle 420 prevents ambient light that is not light 210 emitted by the laser 200 and reflected on an object in the environment of the lidar system 10 to reach the light detector 100.
  • the optoelectronic system 20 of the lidar system 10 comprises a third baffle 430 arranged between the laser 200 and the light detector 100. If the laser 200 is operated at high power, some light may be emitted by the laser 200 at its rear side opposed to the emission side 201. The third baffle 430 prevents such light from reaching the optical detector 100 of the optoelectronic system 20.
  • first cylinder baffle 410 the second cylinder baffle 420 and the third baffle 430 may be omitted.
  • the invention has been illustrated and described in detail on the basis of the embodiment examples. However, the present invention is not limited to the disclosed examples. Rather, other variants may be derived therefrom by a person skilled in the art without exceeding the protective scope of the invention.
  • optical lens 3IO radially inner section 315 first focal length 320 radially outer section

Abstract

An optoelectronic system comprises a light detector, a laser and an optical device arranged one after another along an optical axis of the optoelectronic system. The laser is adapted for emitting light along the optical axis in a direction towards the optical device and away from the light detector. The optical device is adapted for collimating light. The light detector comprises a detection face adapted for detecting light emitted by the laser. The detection face is arranged perpendicular to the optical axis.

Description

OPTOELECTRONIC SYSTEM AND LIDAR SYSTEMS
TECHNICAL FIELD
The present invention relates to an optoelectronic system and to a lidar system comprising an optoelectronic system. BACKGROUND
Lidar systems for measuring a distance to a target are known in the state of the art. Lidar systems shoot short pulses of light towards the target. The light gets reflected by the target and is detected by the lidar system. The time elapsed between the light transmission and the light detection is proportional to the distance of the target. SUMMARY
It is an object of the present invention to provide an optoelectronic system. It is a further object of the present invention to provide a lidar system. These objectives are achieved by an optoelectronic system and by a lidar system according to the independent claims. Other embodiments are disclosed in the dependent claims. In various embodiments, an optoelectronic system comprises a light detector, a laser and an optical device arranged one after another along an optical axis of the optoelectronic system. The laser is adapted for emitting light along the optical axis in a direction towards the optical device away from the light detector. The optical device is adapted for collimating light. The light detector comprises a detection face adapted for detecting light emitted by the laser. The detection face is arranged perpendicular to the optical axis.
The laser and the light detector of this optoelectronic system may have a fixed relative positioning and distance. This allows aligning the laser and the light detector with the optical device of the optoelectronic system together in only one single alignment step. Advantageously, this simplifies the assembly of the optoelectronic system and reduces a risk of a misalignment of either the laser or the light detector of the optoelectronic system.
In an embodiment of the optoelectronic system, the optical device comprises an optical lens. Advantageously, this allows a cost-effective fabrication of the optical device of the optoelectronic system. In an embodiment of the optoelectronic system, a radially inner section of the optical device comprises a first focal length. A radially outer section of the optical device comprises a second focal length. The second focal length is larger than the first focal length. Advantageously, this allows using the same optical device of the optoelectronic system for shaping both light emitted by the laser of the optoelectronic system and incident light detected by the light detector of the optical system. In an embodiment of the optoelectronic system, light emitted by the laser is collimated by the inner section of the optical device. Advantageously, collimating the light emitted by the laser allows the optoelectronic system to create small -diameter light spots at large distances from the optoelectronic system.
In an embodiment of the optoelectronic system, the outer section of the optical device focuses incident collimated light onto the detection face of the light detector.
Advantageously, focusing incident light onto the detection face of the light detector allows the light detector to detect light originating from an extended light spot.
In an embodiment of the optoelectronic system, the light detector comprises a photodiode. Advantageously, this allows for a cost-effective production of the light detector.
In an embodiment of the optoelectronic system, a first cylinder baffle is arranged between the laser and the optical device. Light emitted by the laser runs through the first cylinder baffle. Advantageously, the first cylinder baffle prevents light emitted by the laser to advance directly to the light detector of the optoelectronic system. This ensures that only incident light from outside of the optoelectronic system is detected by the light detector.
In an embodiment of the optoelectronic system, the light detector, the laser and the optical device are arranged in a second cylinder baffle. Advantageously, this second cylinder baffle ensures that only light incident on the optical device of the optoelectronic system from outside of the optoelectronic system is detected by the light detector of the optoelectronic system.
In an embodiment of the optoelectronic system, a third baffle is arranged between the laser and the light detector. The third baffle prevents light escaping from backside of the laser to reach the light detector. This allows operating the laser at high power and ensures that the light detector of the optoelectronic system only detects light incident on the optical device from outside of the optoelectronic system.
A lidar system comprises an optoelectronic system as described above. Advantageously, the assembly of the lidar system is simplified by being able to align the light detector and the laser of the optoelectronic system of the lidar system together relative to the optical device of the optoelectronic system.
BRIEF DESCRIPTION OF THE DRAWINGS
The above-described properties, features and advantages of this invention, as well as the way in which they are achieved, will become more clearly and comprehensively understandable in connection with the following description of exemplary embodiments, which will be explained in more detail in connection with the drawing in which, in schematic representation: Fig. l shows a sectional drawing of a lidar system comprising an optoelectronic system.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
Fig. l shows a schematic sectional view of a lidar system to. The lidar system to may be used to measure a distance to a target that is positioned at a distance from the lidar system to. The lidar system to may for example be used for measuring distances in the order of tens, hundreds or thousands of meters. In addition to the components depicted in Fig. l and described in the following, the lidar system to may comprise additional components.
The lidar system to comprises an optoelectronic system 20. The optoelectronic system 20 comprises a light detector too, a laser 200 and an optical device 300 arranged one after another along an optical axis 30 of the optoelectronic system 20.
The laser 200 is adapted for emitting light 210 in an emission direction 31 which is oriented parallel to the optical axis 30 of the optoelectronic system 20. Light 210 emitted by the laser 200 may also be referred to as a laser beam. Light 210 emitted by the laser 200 may for example comprise a wavelength in the infrared spectral range. The laser 200 is adapted for emitting light 210 at an emission side 201 of the laser 200.
The laser 200 may for example comprise a semiconductor chip with an integrated laser diode. The semiconductor chip of the laser 200 may be arranged in a housing.
The optical device 300 is adapted for collimating light 210 emitted by the laser 200. In the schematic example depicted in Fig. 1, the optical device 300 is an optical lens 305. The optical device 300 may, however, comprise more than one optical lens and may also comprise additional optical components. The optical device 300 is aligned on the optical axis 30 of the optoelectronic system 20 of the lidar system 10 and is arranged in front of the emission side 201 of the laser 200 such that light 210 emitted by the laser 200 in the emission direction 31 strikes the optical device 300. The optical device 300 has a radially inner section 310 and a radially outer section 320. The inner section 310 of the optical device 300 is located closer to the optical axis 30. The outer section 320 of the optical device 300 located further away from the optical axis 30. If the optical device 300 comprises only the optical lens 305, the inner section 310 and the outer section 320 are radial sections of the optical lens 305. The radially inner section 310 comprises a first focal length 315. The radially outer section 320 of the optical device 300 comprises a second focal length 325. The second focal length 325 is larger than the first focal length 315.
Light 210 is emitted by the laser 200 as divergent light 211. Divergent light 210, 211 emitted by the laser 200 in the emission direction 31 is incident on the radially inner section 310 of the optical device 300 and is collimated by the radially inner section 310 of the optical device 300. To this end, the optical device 300 and the laser 200 of the optoelectronic system 20 of the lidar system 10 are spaced at a distance that matches or is close to the first focal length 315 of the radially inner section 310. Light 210 incident on the optical device 300 is transmitted by the optical device 300 and leaves the optical device 300 as collimated light 210, 212 in the emission direction 31 along the optical axis 30 of the optoelectronic system 20.
The collimated light 210, 212 leaves the lidar system 10 and may be reflected back to the lidar system 10 as reflected light 210, 213 by an object in the environment of the lidar system 10. The object may for example be located at a distance of some ten meters, some hundred meters or some thousand meters away from the lidar system 10.
Due to the distance of the reflecting object, the reflected light 210, 213 arriving at the lidar system 10 is collimated and appears to originate from an extended light source. The reflected light 210, 213 arrives at the lidar system 10 in an incident direction 32 that is parallel to the optical axis 30 and opposed to the emission direction 31. The reflected light 210, 213 is incident on the optical device 300 of the optoelectronic system 20 of the lidar system 10.
The light detector 100 of the optoelectronic system 20 of the lidar system 10 is adapted for detecting light comprising the wavelength of the light 210 emitted by the laser 200 of the optoelectronic system 20. Consequently, the light detector 100 is capable of detecting light 210 emitted by the laser 200. The light detector 100 comprises a detection face 101. Light 210 incident on the detection face 101 of the light detector 100 is detected by the light detector 100. The light detector 100 may for example comprise a photodiode 105. The light detector 100 is positioned behind the laser 200 of the optoelectronic system 20 such that the detection face 101 of the light detector 100 is arranged perpendicular to the optical axis 30 and looks in the same direction as the emission side 201 of the laser 200. Consequently, the emission direction 31 in which light 210 is emitted by the laser 200 points away from the detection face 101 of the light detector 100. The detection face 101 of the light detector 100 is centered around the optical axis 30.
Reflected light 210, 213 incident on the optical device 300 of the optoelectronic system 20 of the lidar system 10 is focused onto the detection face 101 of the light detector 100 by the outer section 320 of the optical device 300. To this end, the detection face 101 of the light detector 100 is spaced apart from the optical device 300 by a distance that equals or approximately equals the second focal length 325 of the radially outer section 320 of the optical device 300. Focused light 210, 214 focused onto the detection face 101 of the light detector 100 is detected by the light detector 100.
In operation of the lidar system 10, the laser 200 of the optoelectronic system 20 of the lidar system 10 emits short pulses of light 210, for example pulses comprising a length of some nanoseconds. The lidar system 10 measures the time passed between an emission of light 210, 211 by the laser 200 of the optoelectronic system 20 of the lidar system 10 and the detection of light 210, 214 by the light detector 100 of the optoelectronic system 20 of the lidar system 10. This time is proportional to the distance of the light reflecting object in the environment of the lidar system 10. The lidar system 10 comprises a first cylinder baffle 410 arranged between the laser 200 and the optical device 300 of the optoelectronic system 20. Light 210 emitted by the laser 200 runs towards the optical device 300 through the first cylinder baffle 410. The incoming focused light 210, 214 runs from the optical device 300 to the light detector 100 outside the first cylinder baffle 410. The first cylinder baffle 410 prevents light 210, 211 emitted by the laser 200 to arrive at the light detector 100 without being reflected on an object outside of the lidar system 10.
The optoelectronic system 20 of the lidar system 10 comprises a second cylinder baffle 420. The light detector 100, the laser 200 and the optical device 300 are all arranged inside the second cylinder baffle 420. The second cylinder baffle 420 prevents ambient light that is not light 210 emitted by the laser 200 and reflected on an object in the environment of the lidar system 10 to reach the light detector 100.
The optoelectronic system 20 of the lidar system 10 comprises a third baffle 430 arranged between the laser 200 and the light detector 100. If the laser 200 is operated at high power, some light may be emitted by the laser 200 at its rear side opposed to the emission side 201. The third baffle 430 prevents such light from reaching the optical detector 100 of the optoelectronic system 20.
Each of the first cylinder baffle 410, the second cylinder baffle 420 and the third baffle 430 may be omitted. The invention has been illustrated and described in detail on the basis of the embodiment examples. However, the present invention is not limited to the disclosed examples. Rather, other variants may be derived therefrom by a person skilled in the art without exceeding the protective scope of the invention.
REFERENCE SYMBOLS
10 lidar system
20 optoelectronic system 30 optical axis
31 emission direction 32 incident direction 100 light detector 101 detection face
105 photodiode
200 laser
201 emission side 210 light
211 divergent light 212 collimated light
213 reflected light 214 focused light
3OO optical device
305 optical lens 3IO radially inner section 315 first focal length 320 radially outer section
325 second focal length 410 first cylinder baffle
420 second cylinder baffle 430 third baffle

Claims

WHAT IS CLAIMED IS:
1. An optoelectronic system (20) comprising:
a light detector (100), a laser (200) and an optical device (300) arranged one after another along an optical axis (30) of the optoelectronic system (20),
wherein the laser (200) is adapted for emitting light (210) along the optical axis
(30) in a direction (31) towards the optical device (300) and away from the light detector (100),
wherein the optical device (300) is adapted for collimating light (210),
wherein the light detector (100) comprises a detection face (101) adapted for detecting light (210) emitted by the laser (200), and
wherein the detection face (101) is arranged perpendicular to the optical axis (30).
2. The optoelectronic system (20) of claim 1, wherein the optical device (300) comprises an optical lens (305).
3. The optoelectronic system (20) of claim 1,
wherein a radially inner section (310) of the optical device (300) comprises a first focal length (315),
wherein a radially outer section (320) of the optical device (300) comprises a second focal length (325), and
wherein the second focal length (325) is larger than the first focal length (315).
4. The optoelectronic system (20) of claim 3, wherein light emitted by the laser (200) is collimated by the inner section (310) of the optical device (300).
5. The optoelectronic system (20) of claim 3, wherein the outer section (320) of the optical device (300) focuses incident collimated light (210) onto the detection face (101) of the light detector (100).
6. The optoelectronic system (20) of claim 1, wherein the light detector (100) comprises a photodiode (105).
7. The optoelectronic system (20) of claim 1, wherein a first cylinder baffle (410) is arranged between the laser (200) and the optical device (300), and wherein light (210) emitted by the laser (200) runs through the first cylinder baffle (410).
8. The optoelectronic system (20) of claim 1, wherein the light detector (100), the laser (200) and the optical device (300) are arranged in a second cylinder baffle (420).
9. The optoelectronic system (20) of claim 1, wherein a third baffle (430) is arranged between the laser (200) and the light detector (100).
10. A lidar system (10) comprising an optoelectronic system (20) as claimed in claim 1.
PCT/US2016/057129 2016-10-14 2016-10-14 Optoelectronic system and lidar systems WO2018071043A1 (en)

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WO2020091955A1 (en) * 2018-10-31 2020-05-07 Waymo Llc Lidar systems with multi-faceted mirrors

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EP0429691A1 (en) * 1989-11-27 1991-06-05 Precitronic Gesellschaft für Feinmechanik und Electronic m.b.H Device for determining the position of a target from a predetermined position
EP2312919A1 (en) * 2009-10-08 2011-04-20 Sick Ag Optoelectronic sensor
AT507872B1 (en) * 2009-02-11 2015-02-15 Riegl Laser Measurement Sys DEVICE FOR TESTING AN OBJECT ROOM

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0429691A1 (en) * 1989-11-27 1991-06-05 Precitronic Gesellschaft für Feinmechanik und Electronic m.b.H Device for determining the position of a target from a predetermined position
AT507872B1 (en) * 2009-02-11 2015-02-15 Riegl Laser Measurement Sys DEVICE FOR TESTING AN OBJECT ROOM
EP2312919A1 (en) * 2009-10-08 2011-04-20 Sick Ag Optoelectronic sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020091955A1 (en) * 2018-10-31 2020-05-07 Waymo Llc Lidar systems with multi-faceted mirrors
CN113227826A (en) * 2018-10-31 2021-08-06 伟摩有限责任公司 LIDAR system with polygon mirror
AU2019373056B2 (en) * 2018-10-31 2022-03-03 Waymo Llc LIDAR systems with multi-faceted mirrors
US11536845B2 (en) 2018-10-31 2022-12-27 Waymo Llc LIDAR systems with multi-faceted mirrors

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