Fig. 1. Structure diagram of birefringence measurement system

Fig. 2. Block diagram of overall system design

Fig. 3. Flow chart of scanning module

Fig. 4. Flow chart of data processing module

Fig. 5. Man-machine interaction interface

Fig. 6. X-axis continuous scanning error

Fig. 7. Y-axis continuous scanning error

Fig. 8. X-axis continuous inching scanning error

Fig. 9. Y-axis continuous inching scanning error

Fig. 10. Test results of 1/4 slide retardation repeatability

Fig. 11. Test results of BK7 glass retardation repeatability

Fig. 12. Test results of 1/4 slide fast axis azimuth repeatability

Fig. 13. Test results of BK7 glass fast axis azimuth repeatability

Fig. 14. Scanning results of 1/4 slide

Fig. 15. Scanning results of BK7 glass