An optical element includes a base material, a liquid-repellent member provided on at least a part of a surface of the base material, and a light-reducing member provided between the base material and the liquid-repellent member to protect the liquid-repellent member from radiation of light by reducing the light. A portion of the silicon substrate layer in the second region is removed such that the second region retains a bottom portion made of the silicon semiconductor material. A fingerprint scanner supplies input fingerprint information to a selection unit by way of a generation unit.