Magneto-optical device comprising a magneto-optical read and/or write head with a coil (5), and a means for generating a laser beam (1), wherein the laser beam is passed through an aperture (12) in the coil (5) during operation, characterized in that the coil holder comprises a recess at or around the position of the optical center of the coil, and a lens (4) extends, viewed from the disk, behind the coil, overlapping the coil at least partly.