Fig. 1. Optical path of local zoom imaging system

Fig. 2. Schematic diagram of each parameter of system

Fig. 3. Zoom ratio and LC positive lens focal length varying with LC negative lens focal length

Fig. 4. Diagram of experimental setup

Fig. 5. Liquid crystal lens diagram

Fig. 6. Working principle of double polarizers

Fig. 7. Imaging results for different zoom ratios. (a) X=1; (b) X=1.25; (c) X=1.5; (d) X=1.75

Fig. 8. MTF curves. (a) MTF curve for large field of view; (b) MTF curve for small field of view after zooming

Fig. 9. Imaging results of distant objects. (a) Imaging result when liquid crystal lens is not working; (b) imaging result when liquid crystal lens is working