Scanning device comprising a rotatable mirror, drive unit for use in the scanning device, and rotor body.

摘要

A scanning device comprises a rotatable mirror and a drive unit. The drive unit comprises a rotor section which carries the mirror and which is rotatable about an axis of rotation (19), which rotor section has a disc-shaped at least partly permanent-magnetic rotor body (13). The drive unit further comprises a stationary stator section with coils (9) extending in the magnet field of the rotor body to generate electromagnetic driving forces acting on the rotor body to provide the rotary drive of the mirror, and coils (11) disposed in the magnet field of the rotor body to generate electromagnetic bearing forces acting on the rotor body, for electromagnetically supporting the rotatable rotor section relative to the stator section.