Abstract: This paper presents a new and universal design of the theodolite verification device,the main optimization is structure of collateral strip.The functions are supply of targets,capacity of photoelectric auto-collimation,image collection and processing.And image collection and processing is the key technology.It can collect image of collateral strip reticle based on CMOS camera optical imaging system.And then send the picture to processing software to resolve the center position of feature image.Sequentially,we will get optical axis intersection angle of its strip and the theodolite under inspection or we can get misalignment value of auto-collimation.We can achieve the goal that using image collection and processing to replace collimation of human eyes finally.Totally,the design can reduce the demand of proficiency and collimating fault of tester.Moreover,it can reduce test time,improve accuracy and work efficiency.

Key words: Theodolite verification device, Collateral strip, CMOS camera, Image collection, Picture processing