Optical device for recording and reproducing information

摘要

An optical pickup for recording and reproducing information on record media is provided. The pickup includes light sources corresponding to the record media, a drive circuit for driving one of the light sources, a switch for switching a connection between the drive circuit and one of the light sources, and a control circuit for controlling the drive circuit and the switch.With respect to transmission line lengths between the switch and the light sources, the shorter a wavelength of a light source, the shorter the corresponding transmission line length.