A liquid
zoom lens mounted on a portable terminal is provided. In the liquid
zoom lens, a cylindrical body has upper and lower openings to which one pair of lenses is coupled. An auto-focus lens part includes a first insulating
liquid layer, a first
electrolyte layer, and a first lens. The first insulating layer and the first
electrolyte layer are disposed to form an interface at a lower portion of the body. The first lens is disposed on the first
electrolyte layer and has a periphery closely attached to a lower portion of an inner periphery of the body. An optical
zoom lens part includes a second insulating
liquid layer, a second electrolyte layer, and a second lens. The second insulating
liquid layer and the second electrolyte layer are disposed to form an interface on the first lens. The second lens is fixed to be movable within the second insulating liquid layer, such that a periphery is closely attached to the inner periphery of the body. Accordingly, the auto-focus function and the optical zoom function can be simultaneously achieved through a single
liquid lens whose curvature is varied by the difference of the inherent
refractive index between the electrolyte and the insulating liquid.