| 摘要 |
<p>The focal distance can be greatly changed by performing an electrical control in an optical element. The optical element comprises a first substrate (111) having a first electrode (21), a second substrate (112), a second electrode (22) arranged outside the second substrate, and a liquid crystal layer (311) provided between the first substrate and the second substrate and constituted by liquid crystal molecules oriented. A first voltage (Vo) is applied between the first electrode and the second electrode, thereby controlling the orientation of the liquid crystal molecules, whereby the optical element operates. A third electrode (23) is provided on an insulating layer and outside the second electrode. A second voltage (Vc) independent of the first voltage (Vo) is applied to the third electrode, thereby changing the optical properties.</p> |
