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1. WO2020097574 - DUAL-POLARIZATION LIDAR SYSTEMS AND METHODS

Publication Number WO/2020/097574
Publication Date 14.05.2020
International Application No. PCT/US2019/060633
International Filing Date 08.11.2019
CPC
G01S 17/06
GPHYSICS
01MEASURING; TESTING
SRADIO 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
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
06Systems determining position data of a target
G01S 7/4812
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
481Constructional features, e.g. arrangements of optical elements
4811common to transmitter and receiver
4812transmitted and received beams following a coaxial path
G01S 7/4815
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
481Constructional features, e.g. arrangements of optical elements
4814of transmitters alone
4815using multiple transmitters
G01S 7/4817
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
481Constructional features, e.g. arrangements of optical elements
4817relating to scanning
G01S 7/4818
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
481Constructional features, e.g. arrangements of optical elements
4818using optical fibres
G01S 7/499
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
499using polarisation effects
Applicants
  • THE CHARLES STARK DRAPER LABORATORY, INC. [US]/[US]
  • BYRNES, Steven J. [US]/[US]
  • SPECTOR, Steven J. [US]/[US]
  • MOEBIUS, Michael G. [US]/[US]
Inventors
  • BYRNES, Steven J.
  • SPECTOR, Steven J.
  • MOEBIUS, Michael G.
Agents
  • JAKOBSCHE, George J.
  • ASHER, Robert M.
  • BRAUNLIN, William H.
  • DEMORACSKI, Wendy J.
  • GREEN, Lawrence M.
  • HANS, Arne
  • LACENERE, Christopher
  • MURPHY, Timothy M.
  • NOLL, Kathryn E.
  • SANDVOS, Jay
  • SMOLENSKI, JR., Alexander J.
  • SUNSTEIN, Bruce D.
Priority Data
62/757,98709.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DUAL-POLARIZATION LIDAR SYSTEMS AND METHODS
(FR) SYSTÈMES ET PROCÉDÉS LIDAR À DOUBLE POLARISATION
Abstract
(EN)
A LiDAR system (300) has a field of view (320) and includes a polarization-based waveguide splitter (308). The splitter (308) includes a first splitter port (306), a second splitter port (312) and a common splitter port (316). A laser (302) is optically coupled to the first splitter port (306) via a single-polarization waveguide (304). An objective lens (334) optically couples each optical emitter (326-330) of an array of optical emitters (322) to a respective unique portion of the field of view (320). An optical switching network (340) is coupled via respective dual-polarization waveguides (338) between the common splitter port (316) and the array of optical emitters (322). An optical receiver (314) is optically coupled to the second splitter port (312) via a dual-polarization waveguide (310) and is configured to receive light (336) reflected from the field of view (320). A controller (342), coupled to the optical switching network (340), is configured to cause the optical switching network (340) to route light from the laser (302) to a sequence of the optical emitters (326-330) according to a temporal pattern.
(FR)
La présente invention concerne un système LiDAR (300) ayant un champ de vision (320) et comprenant un diviseur guide d'onde basé sur la polarisation (308). Le diviseur (308) comprend un premier port de diviseur (306), un second port de diviseur (312) et un port de diviseur commun (316). Un laser (302) est couplé optiquement au premier port de diviseur (306) par l'intermédiaire d'un guide d'onde à polarisation unique (304). Une lentille de focalisation (334) couple optiquement chaque émetteur optique (326-330) d'un réseau d'émetteurs optiques (322) à une partie unique respective du champ de vision (320). Un réseau de commutation optique (340) est couplé par l'intermédiaire de guides d'onde à double polarisation (338) respectifs entre le port de diviseur commun (316) et le réseau d'émetteurs optiques (322). Un récepteur optique (314) est couplé optiquement au second port de diviseur (312) par l'intermédiaire d'un guide d'onde à double polarisation (310) et est conçu pour recevoir une lumière (336) réfléchie par le champ de vision (320). Un dispositif de commande (342), couplé au réseau de commutation optique (340), est conçu pour amener le réseau de commutation optique (340) à acheminer une lumière provenant du laser (302) vers une séquence des émetteurs optiques (326-330) selon un motif temporel.
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