Patent ID: 7524589

Claim:
A holographic recording medium comprising: an optical recording layer, which optical recording layer includes one of a polymer compound having photoisomerizable groups in the side chain thereof and a polymer compound in which photoisomerizable molecules are dispersed therein, which recording layer records a hologram by having optical anisotropy induced by irradiation with a writing light having a predetermined wavelength thereon; a first optical filter layer formed on one surface of the optical recording layer, which first optical filter layer allows transmission of the writing light therethrough and blocks light having a shorter wavelength than the wavelength of the writing light; and a second optical filter layer formed on the other surface of the optical recording layer, which second optical filter layer allows transmission of a reading light, having a predetermined wavelength irradiated on the optical recording layer for reproducing the hologram recorded on the optical recording layer, therethrough and blocks light having a shorter wavelength than the wavelength of the reading light, including the writing light; wherein each of the first and second optical filter layers comprises a reflection filter that selectively reflects light; and wherein the wavelength of the reading light is longer than the wavelength of the writing light.