Fig. 1. Adaptive lens

Fig. 2. Principle of the electrowetting liquid lens

Fig. 3. Electrowetting liquid lens

Fig. 4. Principle of the liquid crystal lens

Fig. 5. Adaptive lens driven by dielectric elastic film

Fig. 6. Axial scanning microscopy based on adaptive lens

Fig. 7. Axial scanning liquid lens and its imaging quality

Fig. 8. Microscope based on liquid lenses

Fig. 9. Continuous optical zoom microscope based on liquid lenses and its imaging quality

Fig. 10. 4.0× optical zoom system based on adaptive lens array

Fig. 11. Imaging system based on liquid crystal lens

Fig. 12. Telescope imaging system based on liquid lenses

Fig. 13. Ultrathin telescope based on liquid lenses