A novel method for adjusting CCD camera in geometrical calibration based on a two-dimensional turntable

In order to ensure the accuracy of the collimator viewing angles in geometrical calibration of the CCD camera, a novel method for adjusting CCD camera with wide field of view based on a two-dimensional turntable was presented. The method involves two steps: the first is to adjust collimator parallel to a rotation axis of turntable by estimating a fixed point image of collimator on the CCD when the camera is orientated around this rotation axis; the second step is to adjust the camera axis parallel collimator by estimating the symmetry of point images when the camera is orientated around another rotation axis of turntable. As an example, the adjustment accuracy of the wide field of view radiometer developed by us is analyzed and discussed in the article.