Geometrical camera calibration using lasers and diffractive optical elements

Abstract

It was shown that a reliable calibration can be obtained which allows separating the parameters of the interior orientation of the camera from the orientation parameters of the DOE with respect to the laser and the exterior orientation of the camera. Hence, the alignment requirements of the calibration setup components are reduced to a rather moderate level, which simplifies the calibration procedure and in principle allows in-the-field calibration. A limiting factor for the accuracy is the determination of the sub-pixel position for each diffraction spot, therefore further investigations on shape and intensity distribution are intended. © 2009 Springer-Verlag Berlin Heidelberg.