Analysis Influence Factors on Linear Ccd’s Internal Parameter Calibration

In order to improve the measurement accuracy of the linear CCD in the intersection of vertical target measurement system, the calibration model of linear CCD’s internal parameters is established and the various factors that affect the accuracy in the calibration process are analyzed. Making use of the linear CCD imaging optical principle, the optical center and the effective focal length are calibrated by using upright and inverted mirror state theory and N-style array streak model respectively. It can be proved through theoretical analysis and argument that the method can effectively reduce the impact of the factors as real object height to calibration accuracy and obtain the high precision calibration results which are satisfied the application indicators of linear CCD in the intersection of vertical target measurement system. It can be known from the experimental data that the optical canter calibration accuracy is less than 0.29 pixels and the focal length is less than 2.5‰.