Fig. 1. Principle of electronically controlled birefringence system of KTN crystal

Fig. 2. Experimental setup of electronically controlled birefringence of KTN crystal

Fig. 3. Electronically controlled birefringence phenomenon with different voltage U while θ=80°.(a) U=0; (b) U=400 V; (c) U=600 V; (d) U=800 V; (e) U=1000 V; (f) U=1200 V

Fig. 4. Electronically controlled birefringence phenomenon with different voltage U while θ=55°.(a) U=0; (b) U=600 V; (c) U=1200 V; (d) U=1600 V; (e) U=2200 V; (f) U=2400 V

Fig. 5. Comprison of measured data and simulated data

Fig. 6. Deflection angle α varies with incident angle