Liquid crystal lens with two divided and double circularly hole-patterned electrodes

We propose a liquid crystal lens with two divided and double circularly hole-patterned electrodes for controlling the focal length with negative and positive lens properties. The radially and axial symmetrically distributed refractive index of the hole-patterned aperture can be obtained by controlling the two divided circularly hole-patterned electrodes in addition to the double circularly hole-patterned electrodes.