Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020118173 - FEEDBACK CONTROL FOR LIDAR USING PRINCIPLES OF DIRECT ATOMIC VAPOR ABSORPTION

Publication Number WO/2020/118173
Publication Date 11.06.2020
International Application No. PCT/US2019/064918
International Filing Date 06.12.2019
IPC
G01P 3/06 2006.01
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
3Measuring linear or angular speed; Measuring differences of linear or angular speeds
02Devices characterised by the use of mechanical means
04by comparing two speeds
06using a friction gear
G01S 17/06 2006.01
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 17/50 2006.01
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
50Systems of measurement based on relative movement of target
G01S 17/58 2006.01
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
50Systems of measurement based on relative movement of target
58Velocity or trajectory determination systems; Sense-of-movement determination systems
H01S 3/13 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
3Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
13Stabilisation of laser output parameters, e.g. frequency, amplitude
H01S 5/068 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
5Semiconductor lasers
06Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
068Stabilisation of laser output parameters
Applicants
  • MICHIGAN AEROSPACE CORPORATION [US]/[US]
Inventors
  • JOHNSON, Will
Agents
  • MARQUEZ, Juan, Carlos, A.
Priority Data
62/776,52107.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FEEDBACK CONTROL FOR LIDAR USING PRINCIPLES OF DIRECT ATOMIC VAPOR ABSORPTION
(FR) COMMANDE DE RÉTROACTION POUR LIDAR UTILISANT DES PRINCIPES D'ABSORPTION DIRECTE DE VAPEUR ATOMIQUE
Abstract
(EN)
A direct detection LIght Detection and Ranging ("LIDAR") system for instantaneous measurement of target velocity and distance uses principles of dichroic atomic vapor absorption in a closed feedback loop. In one or more embodiments, the system includes a laser light source to transmit laser light toward a target; a Dichroic Atomic Vapor Laser Locking ("DAVLL") system including a gas cell in a magnetic field, wherein the DAVLL system is coupled to receive the laser light after being reflected by the target and output an error signal that can be used to calculated the relative velocity between the emitter and the target; and a feedback control configured to determine respective gas absorption rates of the LCP and RCP light beams in the gas cell, determine a difference of the respective gas absorption rates, and control the laser light source to adjust the frequency of the transmitted laser light in accordance with the determined ratio.
(FR)
L'invention concerne un système de détection et estimation de la distance par la lumière ("LIDAR") à détection directe pour la mesure instantanée d'une vitesse et d'une distance cibles qui utilise des principes d'absorption de vapeur atomique dichroïque dans une boucle de rétroaction fermée. Dans un ou plusieurs modes de réalisation, le système comprend une source de lumière laser pour émettre une lumière laser vers une cible ; un système de blocage laser à vapeur atomique dichroïque ("DAVLL") comprenant une pile à gaz dans un champ magnétique, le système DAVLL étant couplé pour recevoir la lumière laser après qu'elle été réfléchie par la cible et délivrer un signal d'erreur qui peut être utilisé pour calculer la vitesse relative entre l'émetteur et la cible ; et une commande de rétroaction configurée pour déterminer des taux d'absorption de gaz respectifs des faisceaux de lumière LCP et RCP dans la pile à gaz, déterminer une différence entre les taux d'absorption de gaz respectifs, et commander la source de lumière laser pour qu'elle ajuste la fréquence de la lumière laser émise conformément au rapport déterminé.
Latest bibliographic data on file with the International Bureau