Abstract: A system for forming an object having a three-dimensional structure, the system comprising: a container for providing a photo-curable material to be polymerized; a rotatable stage for supporting the container; a light source for providing light rays having at least one light pattern to be guided into the container via an optical assembly; a processing unit for determining the light source's degree of non-telecentricity, and determining an optimally pre-distorted set of the at least one light pattern based on at least the photo-curable material's refractive index; correcting at least one distortion of the light rays caused by refraction at the container interface and/or correcting at least one distortion of the light rays caused by non-telecentricity; and whereby the correction of the at least one distortion of the light rays is performed without altering the calibration of the optical assembly.

Abstract: A technique for calibrating a 3D imaging system (3D-IS) that has a large field of view (FoV?1 m3) involves: a metrological target mounted for fixed positioning with respect to an origin of the 3D-IS; a movable target plate (MTP) with at least one fiducial mark provided on a marked surface thereof; and a range and orientation measurement system (ROMS) on the MTP for measuring a distance and orientation of the MTP relative to the metrological target. The MTP is designed so that when the MTP is manipulated within the 3D-IS's FoV at an angle at which the ROMS can determine its position and orientation relative to the metrological target, at least a majority of the at least one fiducial marks is presented for coordinatization by the 3D-IS. Using such equipment, calibration involves using the measured data and the simultaneous coordinatization to calibrate.