To meet the requirements of a Computed Radiography (CR) and to implement its functions

a new high-performance laser scanning optical system was designed. In view of difference in performances of scanning methods

a scanning arm is designed which is composed by pentagonal prism and scanning object lens. Scanning arm is used to replace the Fθ lens. To cooperate with scanning arm

a circular imaging plate transport mechanism is designed. Scanning arm can receive stimulation luminescence as a receiving device too. The system designed by this method has simple structure and good performance. In order to testify the effect of spot size on resolution

an experiment has been performed. Many factors that have effect on the spot size are analyzed in this system. Regarding the influence factors of system

dynamic performance of scanning arm is simulated by using the finite element method in high speed rotating

the influence of incident light out of vertical to incident flat of pentagonal prism and pentagonal prism’s displacement errors to the spot size are calculated. The calculation reveals that the system easily adaptive to the error and can be used widely. Experiments were carried out to verity the performance of laser scanner

the results indicate that the images have good visual effect and can meet requirements of industrial inspection.