Fig. 1. Framework of laser angle variation

Fig. 2. Connection of laser and expander lens

Fig. 3. Flow chart of alignment of laser bracket

Fig. 4. Parallelism between emission and receiving systems

Fig. 5. Schematic diagram of multi-axial calibration system

Fig. 6. Framework of laser calibration using collimator and CCD

Fig. 7. Result of alignment between laser and the expander lens

Fig. 8. Alignment scene of multi-beam laser emission system