Patent ID: 7940610
Filing Date: 2011-05-10
Classification: G11B

Abstract:
1. An optical head comprising: a base; an act base, fixed to the base; a support member, fixed to the act base; a lens holder, holding an objective lens; a linear wire spring, fixed to the support member, and elastically supporting the lens holder; a flexible substrate, attached to the support member, wherein the act base has a bottom portion having a flat shape and having an opening portion that is a through hole, the flexible substrate includes an electric wiring for supplying an electric power and has: the support member is fixed so as to close the opening portion and includes: the lens holder includes: an electric power is supplied independently to the focus coil, the tracking coil and the tilt coil through the wire spring from the land, and the adhesive recessed groove is formed in an elongated space having an end portion opened by arranging the turning portion of the flexible substrate, and an end portion held in contact with the act base has an adhesive agent relief portion that has a recessed groove shape deeper than the adhesive recessed groove so as to be connected to the opening portion.