Patent ID: 7633661

Claim:
A hologram recording apparatus comprising: a light source, for irradiating coherent light; light separator, for separating the coherent light into light for a reference beam and light for a signal beam; optical path changer, for changing an optical path of each light separated by the light separator so that the reference beam and the signal beam may be irradiated simultaneously onto an optical recording medium; a spatial light modulator, disposed in the optical path of the light for the signal beam for modulating the light for the signal beam in accordance with a supplied recording signal to create signal beam for recording a hologram; and a diffused light irradiator for irradiating diffused light simultaneously with the reference beam onto at least areas of the optical recording medium where the reference beam is irradiated, wherein the diffused light irradiator includes: a diffusing body that diffuses at least one of the reference beam and the signal beam that have passed through the optical recording medium, and a reflecting body that reflects the diffused light diffused by the diffusing body towards the optical recording medium.