| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable focus lens capable of varying a focal length at high speed.SOLUTION: A variable focus lens includes: an electro-optical material comprising a single crystal having inversion symmetry; a plurality of electrode pairs, in which each pair of electrodes is formed on a first surface of the electro-optical material and on a second surface opposing to the first surface, at positions opposing to each other; and a light-emitting element disposed so as to illuminate the electro-optical material. By changing a voltage applied between the electrode pair, the focus of light transmitted through the electro-optical material can be changed. |
