Fig. 1. Block diagram of two-dimensional distribution measurement of stress birefringence

Fig. 2. System device diagram

Fig. 3. Bessel series

Fig. 4. Digital phase lock result of modulation light signals

Fig. 5. Measurement results of 1/4 waveplate

Fig. 6. Measurement results of the 1/4 waveplate over the whole optical aperture

Fig. 7. Stress birefringence two-dimensional distribution of BK7 glass sample