Patent ID: 7227675

Claim:
A hologram recording medium, comprising: an optical waveguide layer, comprising: a plurality of cladding layers with a low refractive index; a plurality of core layers alternatively disposed with the cladding layers; and a plurality of diffraction gratings disposed at interfaces between the cladding layers and the core layers or in the plurality of core layers; a hologram recording layer to which data is recorded as a hologram by perpendicularly irradiating and focusing an object beam thereon, and irradiating a reference beam thereon by inputting the reference beam into one of the plurality of core layers and diffracting the reference beam with one of the plurality of diffraction gratings, and from which the data is reproduced by irradiating the reference beam thereon through an object lens; and a light velocity restriction member interposed between the hologram recording layer and the optical waveguide layer, wherein the hologram recording layer, the optical waveguide layer, and the light velocity restriction member are integrally formed.