Fig. 1. Structure diagram of four electrode liquid crystal device

Fig. 2. Coordinate systems. (a) Effective regional plane coordinate system; (b) deflected beam space coordinate system

Fig. 3. Liquid crystal wedge array structure diagram

Fig. 4. Interference image acquisition optical path

Fig. 5. Response curve of liquid crystal phase change relative to voltage

Fig. 6. Device response time measurement

Fig. 7. Interference fringe patterns. (a) Off state of device; (b) interference fringes with φ of 0°, 45°, 90°, and 135° in the four regions respectively; (c) interference fringes with the same φ and decreasing θ

Fig. 8. Comparison of theoretical and measured deflection angles

Fig. 9. Examples of exit beam wavefront reconstruction. (a) φ=0°; (b) φ=45°; (c) φ=90°; (d) φ=135°

Fig. 10. Projection of the wavefront contour of the exit beam on the xOy plane