OPTICAL MEMORY MEDIUM AND OPTICAL MEMORY MEDIUM REPRODUCING DEVICE

摘要

An optical memory medium includes at least one multi-layered waveguide hologram ROM (2-7) that uses diffracted light based on incident light to a multi-layered waveguide hologram to read out data, and at least one memory (2-5) that is integrally constituted with the multi-layered waveguide hologram ROM and is used to read and write data. A reproduction apparatus for the optical memory medium includes a light inputting unit (4-3, 4-4) for inputting light into the multi-layered waveguide hologram of the optical memory medium, a light receiving element (4-9) for receiving light diffracted by the multi-layered waveguide hologram from the light input by the light inputting unit and for converting into an electric signal, and a data record reproduction unit (4-6, 4-7) for reading and writing data with respect to the memory of the optical memory medium.