Included are an optical fiber (11), a driver (21) that drives an emission end (11b) of the optical fiber (11), a current detector (55) that detects a current flowing in the driver (21), and a controller (31) that scans light emitted from the optical fiber (11) by controlling the driver (21) based on output of the current detector (55). The driver (21) comprises vibration elements (28a to 28d), ground terminals of the vibration elements (28a to 28d) are connected in common to the driver (21), and the current detector (55) detects the current at the power supply terminal of the vibration elements (28a to 28d).
