A novel CCD laser autocollimator was discussed. In order to improve test accuracy and real-time performance of the measuring system

a method based on hardware parameters study was proposed to meliorate the quality of spot image. The computation of image processing can be simplified and the processing time was saved also the measuring precision was improved especially. Size of small aperture

CCD integral time

focal length of objective

brightness and contrast parameters of image data acquisition card were adjusted respectively to optimize the autocollimator. In the end

experiments of contrasting the accuracy of system before and after optimizing were carried out. The experimental results show that the measuring accuracy has been achieved from 5.0 arc-seconds to 1.0 arc-second in 0.417s.