Calibration of geometric parameters of line-array CCD camera based on exact measuring angle in lab

A calibration system for geometric calibration of line-array CCD camera is established.The equipment,environment,algorithm based on exact measuring angle and calibration precision are investigated. According to the requirement of calibration precision,equipment and environment are confirmed.The field angles and image heights are tested by combining high-accuracy two-dimension turn-table with CCD subdivision measurement.Finally,the geometric parameters of the camera are calculated by a least square regression analysis.The analysis results show that the calibration precision of principal distance and principal point have reached micron level and the calibration precision of relative distortion is smaller than 1×10-4.This method can meet the requirements of high precision calibration of line-array CCD and has higher practical application value.