DEVICE AND METHOD FOR VARIABLE CURVATURE

摘要

PURPOSE: A curvature adjusting element and a method thereof are provided to change the curvature of a lens surface without a mechanical device or an external pump by pressure type operation using an electrowetting principle. CONSTITUTION: A first fluid(F1) has transparency and polarity. A second fluid(F2) has transparency and a property not mixed with the first fluid. A chamber includes an inner space for the first fluid and the second fluid. A first surface forms a lens surface with a boundary surface of the first and the second fluids. A second surface induces a curvature change of the lens surface with the boundary surface of the first and the second fluids. A first intermediate plate(150) is prepared in the chamber to form a first through hole forming the diameter of a lens corresponding to the lens surface and a second through hole forming a path of the second fluid. Electrode units(120,180) form an electric field for changing a position of the second surface.