| 摘要 |
PURPOSE:To vary the refractive indices in respective annular parts so that a lens effect is generated by forming plural pieces of transparent electrodes each having a prescribed concentrical annular shape and impressing voltages which are respectively changed to staircase shapes to the respective annular transparent electrodes directing from the center of transparent plates toward the peripheral part. CONSTITUTION:This device is constituted by inserting a material of which the optical properties change with a change in the impressed voltage between the two transparent plates 1 and 2 which are provided to face each other. Plural pieces of the concentrically annular transparent electrodes 4 are formed on the opposite face of one transparent plate 1 and the voltages which are changed respectively to the staircase shapes so as to correspond to the respective annular transparent electrodes 4, 5 directed from the center of the plats 1, 2 toward the periphery are impressed between the respective electrodes 4 and the opposite surface of the other plate 2. The refractive indices of the partial ranges corresponding to the respective electrodes are thereby varied and the electro-optic element device corresponding to an arbitrary variable focus lens is obtd.
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