An optical system, including one or more coherent light, an optical arrangement, and a detection unit, and respective method are described. The optical arrangement includes optical elements forming at least first and second interferometer loops, each including a reference arm and an interrogating arm and are associated with at least first and second detectors of the detection unit. Light propagating in the interrogating arm is directed at a target object via an output optical element and a reflection of light from said target object is collected by an input optical element. The detection unit is configured to determine data indicative of a relation between signals detected by the at least first and second detectors. One of the first and second interferometer loops includes a first noise generator positioned to affect light propagating in both of the corresponding reference and interrogating arms, thereby affecting coherence of light in the interferometer loops.
G01B 9/02015 - Interféromètres caractérisés par la configuration du parcours du faisceau
G01B 9/02001 - Interféromètres caractérisés par la commande ou la génération des propriétés intrinsèques du rayonnement
G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés
2.
SYSTEM AND METHOD FOR OPTICAL RANGE AND VELOCITY DETECTION
A system configured for detection of at least one of range and velocity of a target. The system comprising at least one radiation source and optical arrangement configured to direct the radiation source to form at least one signal beam and two or more reference beams or at least one reference beam and two or more signal beams. The at least one radiation source provides radiation associated with at least first and second different modulations. The optical arrangement transmits the signal beams toward a target and collects reflected beams from the target and combines all beams to generate an interference beam. The optical arrangement comprises a frequency modulator, adapted to generate a selected frequency shift to one of the two or more reference (signal) beams. Detection of frequency components of the interference beam associated with the first and second different modulations of the emitted radiation provides data on velocity and range to the target.
G01B 9/02003 - Interféromètres caractérisés par la commande ou la génération des propriétés intrinsèques du rayonnement utilisant plusieurs fréquences utilisant des fréquences de battement
G01B 9/02015 - Interféromètres caractérisés par la configuration du parcours du faisceau
G01P 3/36 - Dispositifs caractérisés par l'emploi de moyens optiques, p. ex. en utilisant la lumière infrarouge, visible ou ultraviolette
G01S 17/34 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées utilisant la transmission d'ondes continues modulées en fréquence, tout en faisant un hétérodynage du signal reçu, ou d’un signal dérivé, avec un signal généré localement, associé au signal transmis simultanément
G01S 17/58 - Systèmes de détermination de la vitesse ou de la trajectoireSystèmes de détermination du sens d'un mouvement
3.
SYSTEM AND METHOD FOR OPTICAL RANGE DOPPLER DETECTION
A system configured for detection of at least one of range and velocity of a target. The system comprising at least one radiation source and optical arrangement configured to direct the radiation source to form at least one signal beam and two or more reference beams or at least one reference beam and two or more signal beams. The optical arrangement transmits the signal beams toward a target and collects reflected beams from the target and combines all beams to generate an interference beam. The optical arrangement comprises a frequency modulator adapted to generate a selected frequency shift to one or the two or more reference (signal) beams. Detection of frequency components of the interference beam provides data on at least one of velocity and range to the target.
G01S 17/34 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées utilisant la transmission d'ondes continues modulées en fréquence, tout en faisant un hétérodynage du signal reçu, ou d’un signal dérivé, avec un signal généré localement, associé au signal transmis simultanément
G01S 17/58 - Systèmes de détermination de la vitesse ou de la trajectoireSystèmes de détermination du sens d'un mouvement
4.
Method and apparatus for mapping and ranging based on coherent-time comparison
Provided is a system for range detection including at least one beam source arrangement configured to provide illumination of certain coherence length, an optical arrangement, and a detection arrangement including at least one detector unit.
G01B 9/02001 - Interféromètres caractérisés par la commande ou la génération des propriétés intrinsèques du rayonnement
G01B 9/02004 - Interféromètres caractérisés par la commande ou la génération des propriétés intrinsèques du rayonnement utilisant plusieurs fréquences utilisant le balayage des fréquences
G01B 9/02015 - Interféromètres caractérisés par la configuration du parcours du faisceau
G01B 11/02 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur
G01S 17/08 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement
An optical system and respective method are described. The system comprising one or more coherent light, an optical arrangement, and a detection unit. The optical arrangement comprises optical elements forming at least first and second interferometer loops, each comprising a reference arm and an interrogating arm and are associated with at least first and second detectors of the detection unit. Light propagating in said interrogating arm is directed at a target object via an output optical element and a reflection of light from said target object is collected by an input optical element. The detection unit is configured to determine data indicative of a relation between signals detected by the at least first and second detectors. One of said first and second interferometer loops comprises a first noise generator positioned to affect light propagating in both of the corresponding reference and interrogating arms, thereby affecting coherence of light in said interferometer loops.
A system for range detection is described. The system comprises at least one beam source arrangement configured to provide illumination of certain coherence length, an optical arrangement, and a detection arrangement comprising at least one detector unit. The optical arrangement comprises optical elements forming at least first and second interferometer arrangements formed of a reference path and an interrogating path. The interrogating paths direct beam portions toward a target object and collect beam portions reflected therefrom. The reference path and interrogating path are combined to generate an interference signal on at least one detector of the detection arrangement generating detection data comprising at least first and second detected signals. Wherein, the first and second interferometer arrangements are configured with respective first and second different coherence factors, associated with at least one of (a) optical path of reference paths of the first and second interferometer arrangements, and (b) coherence length of beam passing in said first and second interferometer arrangements. A relation between said at least first and second detected signals is indicative of a distance to said target object.
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