HOLOGRAPHIC RECORDING MEDIUM AND PICKUP FOR THIS MEDIUM

摘要

The present invention relates to a holographic recording medium (9) adapted to store additional information for the recorded holograms, and to a holographic pickup (1) for a holographic storage system for use with the holographic recording medium (9). According to the invention, the holographic recording medium (9) has a holographic layer (94) for storing holograms and a servo layer (92) for positioning a light beam for reading and/or recording of a hologram relative to the holographic recording medium, wherein additional data can be recorded in the servo layer (92). A holographic pickup (1) for use with such a holographic recording medium (9) includes a detector (20) for retrieving the additional data recorded in the servo layer (92).