Objective lens drive device and optical pickup

摘要

In an optical pickup equipped with a semiconductor laser, electro-optical components such as a lens, and an objective lens drive device, the objective lens drive device includes objective lenses, a holder holding the objective lenses, a focusing coil, and tracking coils. The focusing coil is wound in parallel to the optical surface of the objective lens, and formed in a parallelogram shape having inclined portions provided near the tracking coils. The two tracking coils are placed on diagonal portions of the lens holder.

主权项

1. An objective lens drive device, comprising:
objective lenses guiding light emitted from a light emitting element to a disc surface; a holder in which the objective lenses are mounted; a focusing coil wound around the holder; a tracking coil attached in the vicinity of the focusing coil; and magnets for operating the focusing coil and the tracking coil, wherein: a magnet-facing face of the focusing coil includes a part extending parallel to a surface of at least one of the magnets which creates a magnetic-propulsion effective range for moving the focusing coil, and a space is provided in the focusing coil for placing the tracking coil.