Method and device for generating a synthetic wavelength

G - Physics – 01 – B

Patent

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G01B 9/02 (2006.01)

Patent

CA 2663990

In a method for generating a synthetic wavelength, particularly for an interferometric distance measuring setup, with a primary laser source defining a primary frequency U0 and at least a first sideband frequency U1 of the primary frequency U1, laser radiation with the first sideband frequency O1 and a corresponding first wavelength is provided wherein the first sideband frequency U1 is continuously shifted, particularly by modulating the primary laser source. The synthetic wavelength is generated by combining the first wavelength and a second wavelength which is defined by the primary laser source, particularly by superposition.

La présente invention concerne un procédé de génération d'une longueur d'onde synthétique, notamment pour l'établissement d'une mesure de distance interférométrique, avec une source laser primaire définissant une fréquence primaire U0 et aumoins une première fréquence de bande latérale U1 de la fréquence primaire U1, le rayonnement laser avec la première fréquence de bande latérale U1 et une première longueur d'onde correspondante étant fournis. La première fréquence de bande latérale est décalée en continu, notamment par la modulation de la source laser primaire. La longueur d'onde synthétique est générée par la combinaison de la première longueur d'onde et d'une seconde longueur d'onde qui est définie par la source laser primaire, notamment par superposition.

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