Patent ID: 7859677

Claim:
An optical calibration system, comprising an illumination projector having an illumination projection axis lying in a plane, wherein the projector is positioned at a selected reference location coordinate (x P ,y 0 ,z p ) in the plane, further wherein the projection axis has a known projection axis direction in the plane; an illumination imager having an imaging axis lying in the plane, wherein the illumination imager is positioned at a known receiver location coordinate (x R , y 0 , z R ) in the plane; a calibration component comprising at least a first at least partially diffusely reflecting surface disposed along the projection axis at a known first surface location coordinate (x C ,y 0 ,z C1 ) and a second at least partially diffusely reflecting surface disposed along the projection axis at a known second surface location coordinate (x C ,y 0 ,z C2 ) that is different than the first surface location coordinate, the system configured such that the first at least partially diffusely reflecting surface and the second at least partially diffusely reflecting surface are disposed along the projection axis at a same time; and a processing component operatively coupled to the system and adapted to determine a spatial calibration indicia for the system.