Chromatic diffraction range finder

Details Chromatic diffraction range finder Chromatic diffraction range finder

G - Physics

01

C

G01C 3/08 (2006.01) G01B 11/00 (2006.01) G01B 11/25 (2006.01) G02B 5/18 (2006.01)

Patent

CA 2476312

A method and system for determining range by correlating a relationship between one or more distances of a diffraction grating (340) from an illuminated target surface (330) with variations in the respective wavelengths of high order diffraction spectra. The high order diffraction spectra are observed (355) through the diffraction grating. The high order diffraction spectra are derived from broadband radiation transmitted from the illuminated target surface.

La présente invention concerne un procédé et un système permettant de déterminer une distance par corrélation d'une relation entre, d'une part une ou plusieurs distances d'un réseau de diffraction par rapport à la surface éclairée d'une cible, et d'autre part des écarts dans les différentes longueurs d'ondes de spectres de diffraction d'ordre supérieur. Les spectres de diffraction d'ordre supérieur sont observés au travers du réseau de diffraction. Ces spectres de diffraction d'ordre supérieur sont déduits du rayonnement large bande émis par la surface de la cible éclairée.

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