A liquid-crystal (LC) lens driven by two voltages is reported. The lens has a focal length that is electrically tunable. The range of the variable focusing power is very wide, covering approximately 0.8–10.7 D. In the entire focal range the LC lens maintains high optical quality. The LC lens can be driven in a simple way to prevent the occurrence of a disclination line. The use of the LC lens in image formation is demonstrated.
© 2004 Optical Society of America
Mao Ye, Bin Wang, and Susumu Sato, "Liquid-Crystal Lens with a Focal Length that is Variable in a Wide Range," Appl. Opt. 43, 6407-6412 (2004)