| 摘要 |
An optical pickup system operates in one of electrically switchable first and second modes in accordance with an optical disk loaded on a disk tray. The optical pickup system comprises a substrate having a top surface and an inclined side surface, a waveguide, formed on the top surface of the substrate and provided with a light source, an optical detector and a coupling lens, and an optical device attached to the inclined side surface and provided with a first and a second regions, the first region reflecting a first linearly polarized component of the light beam from the light source to the coupling lens and the second region operating in one of electrically switchable first and second modes in accordance with the type of the optical disk. In the system, the light incident to the second region is transmitted to outside of the optical pickup system in the first mode and is reflected to the coupling lens by the second region in the second mode. The reflected light is focused on the optical disk by the coupling lens and reflected back thereto to travel in a reverse direction to the optical detector. |
