Optical device, imaging device, focus driving method, and method for moving lens center

A method for moving a lens center of an optical device, wherein the optical device comprises a first electrode layer, a first alignment layer, a liquid crystal layer, a second alignment layer, and a second electrode layer being arranged in turn along a light transmission direction;

• the first electrode layer comprises a first electrode, a second electrode, and a first impedance membrane arranged between the first electrode and the second electrode, and the first electrode and the electrode are respectively on opposite ends of the first impedance;
• the second electrode layer comprises a third electrode, a fourth electrode, and a second impedance membrane arranged between the third electrode and the fourth electrode, and the third electrode and the fourth electrode are respectively arranged on opposite ends of the second impedance membrane;
• the first electrode, the second electrode, the third electrode, and the fourth electrode form a light transmission hole being shaped as a parallelogram;
• and
• the method for moving a lens center of an optical device comprises:
• applying alternating voltages to the first electrode, the second electrode, the third electrode, and the fourth electrode, wherein the lens center of the optical is in a first position, and a coordinate of the lens center of the optical device is:
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• changing V1, V2, V3, V4, φ1, φ2, φ3 and/or φ4 such that the lens center of the optical device is in a second position, wherein L1 is a distance between the first electrode and the second electrode, L2 is a distance between the third electrode and the fourth electrode, V1 and φ1 are respectively an amplitude and an initial phase of the alternating voltage obtained from the first electrode, V2 and φ2 are respectively an amplitude and an initial phase the alternating voltage obtained from the second electrode, V3 and φ3 are respectively an amplitude and an initial phase of the alternating voltage obtained from the third electrode, and V4 and φ4 are respectively an amplitude and an initial phase of the alternating voltage obtained from the fourth electrode;
• wherein the optical device is a round lens.