The influence of the vignetting (geometrical as well as natural) of measurement camera optical system on the illumination distribution on the detector (scientific CCD sensor) surface

摘要

The problem of illumination distribution nonuniformity in the detector (scientific CCD sensor) plane, resulting from natural and geometrical vignetting effects in the camera optical system. The complex and nonlinear nature of this illumination changes are discussed, leading to the necessity of the calibration procedures in high precision photometric measurements.