| 摘要 |
A head and media for optical data storage with a media in which a partially light transmissive recording layer and a reflective layer are located on opposite faces of a transparent substrate layer. The head emits a light beam which passes through the recording layer, transits the substrate layer, reflects internally off the reflective layer, transits the substrate layer in the opposite direction, and comes to focus on the recording layer. This optical path is used for reading and writing. Two of these optical media, placed back to back, with recording layer faces outward, can be used to form a double-sided media with read and write capability from either side. In a magneto-optical system, since the recording layer is near the outer surface, both the optical and magnetic heads can be located and moved as a single unit, increasing the speed and reliability and reducing the cost. |
