OPTICAL UNIT

摘要

An optical unit includes a lens through which light emitted from a light source 29 enters from behind and the light emits frontward as an irradiation beam. A rotation lens 26 moves periodically, and a front part is scanned with the irradiation beam, so that a predetermined irradiated region can be formed. The rotation lens 26 may be configured such that the lens rotates about a rotation axis connected to a drive part and such that the direction of light, which emits from the light source 29 and is then refracted when the light passes through the lens, varies periodically.