Variable focus lens

摘要

The variable focus lens (100) of the present invention changes the refractive power by changing each of the shapes of a first interface (107) formed by a first liquid (101) and a second liquid (102) that have refractive indices that differ from each other and a second interface (108) formed by the second liquid (102) and a third liquid (103) that have refractive indices that differ from each other. Thereby, this variable focus lens (100) changes the first interface (107) and the second interface (108) such that the sign of the refractive power of the first interface (107) and the sign of the refractive power of the second interface (108) differ from each other.