Fig. 1. Schematic diagram of comb electrode structure

Fig. 2. Top view of elctrode structure of a rectangular aperture LC lens

Fig. 3. Impact of changing a and b on voltage distribution.（a）Fixing b to change a；（b）Fixing a to change b.

Fig. 4. Voltage difference simulation diagram. The b-values for（a~d）and（e~h）are 6，18，42 and 66，respectively.

Fig. 5. Simulation of liquid crystal director vector distribu-tion.（a）2D；（b）3D.

Fig. 6. Schematic diagram of LC cell

Fig. 7. Experimental setup of phase response

Fig. 8. Phase response curve

Fig. 9. Real object photo of LC lens

Fig. 10. Experimental setup diagram

Fig. 11. Wavefront diagram. The b-values for（a~d）and（e~h）are 6，18，42 and 66，respectively.

Fig. 12. Diagram of lens spherical aberration

Fig. 13. Wavefront diagram.（a‍~‍c）Voltage difference at the centre are 2.1 V，2.3 V，2.5 V，respec-tively；（d~f）Voltage difference at the corners are -2.1 V，-2.3 V，-2.5 V，respectively.

Fig. 14. Phase distribution on the diagonal of positive and negative LC lenses

Fig. 15. Variation of LC lens focal length and optical focus with voltage difference

Fig. 16. Measurement device of LC lens response time

Fig. 17. Measurement results of LC lens response time

Fig. 18. Imaging device diagram

Fig. 19. Imaging diagram.（a）Off state；（b）On state.