G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 9/02 (2006.01) G01B 11/02 (2006.01) G01S 17/32 (2006.01)
Patent
CA 2723344
In a distance-measuring method, chirped laser radiation with two separable radiation components is emitted to at least one target to be surveyed and via a local oscillator path, the radiation components having an opposite chirp as a time dependency of the modulated wavelengths (.lambda.1, .lambda.2). After reception of the laser radiation scattered back from the target and passed via the local oscillator path, the laser radiation received is converted into signals and the distance to the at least one target is determined from the signals on the basis of interferometric mixing, separation of the radiation components being effected on the basis of their spectral characteristic.
L'invention concerne un procédé interférométrique de mesure de distance dans lequel un rayonnement laser à impulsions compressées comprenant deux composantes séparables de rayonnement est émis vers au moins une cible à examiner via un chemin doscillateur local, les composantes du rayonnement présentant une compression opposée variable dans le temps des longueurs dondes modulées (?1, ?2). Après réception du rayonnement laser rediffusé à partir de la cible et transmis via le chemin doscillateur local, le rayonnement laser reçu est converti en signaux et la distance jusquà la ou jusquaux cibles est déterminée à partir des signaux sur la base dun mélange interférométrique, la séparation des composantes du rayonnement étant effectuée sur la base de leur caractéristique spectrale.
Jensen Thomas
Rohner Marcel
Borden Ladner Gervais Llp
Leica Geosystems Ag
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