Fig. 1. Profile of single round hole liquid crystal lens

Fig. 2. Profile of double structure liquid crystal lens

Fig. 3. Liquid crystal arrangement of different voltages and distribution diagram of liquid crystal refractive index. (a) Liquid crystal arrangement without voltage; (b) liquid crystal arrangement with voltage; (c) distribution diagram of liquid crystal refractive index

Fig. 4. GRIN lens principle of liquid crystal lens

Fig. 5. 3D outline of single layer structure lens

Fig. 6. 3D outline of double layer structure lens

Fig. 7. Aberrations of double layer structure lens

Fig. 8. MTF curves of single layer liquid crystal lens

Fig. 9. MTF curves of double layer liquid crystal lens

Fig. 10. Experimental facility of test

Fig. 11. Single and double layer structure lens interference pattern with different voltages. (a) Single layer structure lens with 2.5Vrms; (b) single layer structure lens with 20Vrms; (c) double layer structure lens with 20Vrms