Patent ID: 6122089
Filing Date: 2000-09-19
Classification: G02B

Abstract:
An optical deflector, comprising:a supporter,a movable plate on which a mirror face for reflecting light is formed,at least one elastic member for connecting the movable plate and the supporter and holding the movable plate so that the movable plate can deflect,a driving coil which is formed in a ring form on the movable plate in such a manner that the driving coil passes near a movable end of the movable plate when the movable plate deflection-moves, anda magnet and a magnetic yoke generating a closed magnetic circuit for applying a magnetic field to the driving coil in a direction substantially parallel to the plane of the movable plate;wherein the optical deflector generates a driving force by applying a current to the driving coil inside a magnetic gap of the closed magnetic circuit and deflection-moving the movable plate by elastic deformation of the at least one elastic member, andwherein the magnet is arranged at a position opposite to the movable end of the movable plate outside the driving coil, and at least one of the magnet and the magnetic yoke is arranged at a position near the movable plate inside the driving coil to form the magnetic gap.