Patent ID: 8166495
Filing Date: 2012-04-24
Classification: G11B

Abstract:
1. An optical pickup, comprising: an objective lens; a lens holder that holds the objective lens; at least one magnet disposed opposite to a side surface of the lens holder; a yoke having a bottom surface and at least one side surface, the at least one magnet being attached to an inside surface of the at least one side surface; and a cover attached to a top of the yoke; wherein the yoke has portions surrounding at least one opening extending therethrough which is positioned at least at the bottom surface of the yoke, the at least one opening of the yoke being positioned opposite a bottom surface of the at least one magnet in a direction parallel with an optical axis of the objective lens; wherein the bottom surface of the at least one magnet is visually observable through the at least one opening of the yoke from outside of the yoke in the direction parallel with the optical axis of the objective lens; wherein the cover has portions surrounding at least one opening extending therethrough, the at least one opening of the cover being positioned opposite a top surface of the at least one magnet in the direction parallel with the optical axis of the objective lens; wherein the top surface of the at least one magnet is visually observable through the at least one opening of the cover from outside of the cover in the direction parallel with the optical axis of the objective lens; and wherein each of the at least one opening of the yoke and the at least one opening of the cover enables a jig to be inserted therethrough, the jig being adapted to sandwich the at least one magnet from opposite sides thereof and to adjust a position of the at least one magnet.