Telescope based calibration of a three dimensional optical...

G - Physics – 01 – S

Patent

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G01S 7/497 (2006.01) G01C 25/00 (2006.01)

Patent

CA 2745917

An embodiment of the invention includes using a set of telescopes to calibrate a three dimensional optical scanner. Three separate calibrations are disclosed for a survey grade calibration: (1) angular calibration, im-plemented using at least one anti-podal pair of telescopes, (2) range calibration, implemented using at least one telescope mounted fiber recirculator, and (3) tilt calibration, implemented using at least one pair of telescopes not mounted in anti-podal configuration and an integral tilt table. Methods for aligning or measuring the mis-alignment between anti-podal telescope pairs are also described.

Linvention concerne lutilisation dun ensemble de télescopes pour calibrer un scanner optique tridimensionnel. Selon linvention, un calibrage détude se compose de trois calibrages séparés : (1) un calibrage angulaire, réalisé en utilisant au moins une paire de télescopes antipodaux, (2) un calibrage de portée, réalisé en utilisant au moins un recirculateur à fibre monté sur un télescope, et (3) un calibrage de linclinaison, réalisé en utilisant au moins une paire de télescopes non montés dans une configuration antipodale et un plateau inclinable intégré. Linvention concerne également des procédés dalignement ou de mesure du défaut dalignement entre les paires de télescopes antipodaux.

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