Patent ID: 7643217
Filing Date: 2010-01-05
Classification: G02B

Abstract:
1. A varifocal lens device comprising: a first liquid; a second liquid that is capable of forming an interface with the first liquid without being mixed with the first liquid, and has a refractive index different from that of the first liquid; a cell in which the first liquid and the second liquid are sealed; an opening member that is shiftable in the cell, while being made in contact with the interface between the two liquids, with the interface between the first liquid and the second liquid being remained stationary by an edge portion thereof; and an actuator that is coupled to the opening member, for controlling a shape of the interface of the two liquids of a liquid lens formed in an opening portion of the opening member by allowing the opening member to shift so that a position of a focal point of the liquid lens is variably controlled.