Fast calibration method of alignment prism based on image transformation relation

Abstract

The alignment assembly based on the principle of coaxial imaging has high accuracy, and the accuracy of coaxial imaging is the key to it. Manually calibrating the pose of the prism to ensure the accuracy of coaxial imaging, which has disadvantages such as difficult operation and long time consuming. This paper analyzes the image relation between the upper and lower parts of the prism based on the optical imaging theory, and solves the image transformation relation between the target part and the assembly part with an experimental method, and proposes a rapid calibration method for the alignment prism based on the image transformation relation. The tedious steps of manually adjusting the prism are eliminated. The experimental results show that this method realizes the high-precision assembly of parts by the micro-assembly system.