OPTICAL PICKUP AND OPTICAL DISC DEVICE

摘要

An optical pickup includes an integrated circuit element (LDD) (5) for driving a first, a second, and a third semiconductor laser (3, 4, 5). The LDD (50) has a shape having a rectangular main surface defined by sides and a plurality of I/O pins are arranged on each of the sides. The I/O pins includes a first pin group connected to the blue/violet laser (5) having the shortest oscillation wavelength, a second pin group connected to the red laser (4), and a third pin group connected to the infrared laser (3). The optical pickup wiring structure includes a first transmission line (41) connecting the first pin group to the blue/violet laser (5), a second transmission line (33) connecting the second pin group to the red laser (4), and a third transmission line (31) connecting the third pin group to the infrared laser (3). The first transmission line (41) is shorted than the second and the third transmission line (31, 33). On the rectangular main surface of the LDD (50), the side having the first pin groups orthogonally intersects the side having the second pin group or the side having the third pin group.