Patent ID: 7319550
Filing Date: 2008-01-15
Classification: G03H,G06K

Abstract:
1. A method for recording a hologram in a holographic recording layer on a support body, the holographic recording method comprising irradiating a signal light beam, wherein the irradiating is conducted under one of following conditions: a focal point of the signal light beam is formed at a position that is located on a signal light beam outgoing side of said holographic recording layer and separated from the surface on the signal light beam outgoing side of said holographic recording layer along an outgoing direction by a distance exceeding a thickness of said holographic recording layer, when said holographic recording layer is irradiated with a reference light beam and the Fourier-transformed signal light beam from the same side of the holographic recording layer to record the hologram; or the focal point of the signal light beam is formed at a position located a distance from a surface on a signal light beam outgoing side of said holographic recording layer, when said holographic recording layer is irradiated with a reference light beam and the Fourier-transformed signal light beam from the different sides to record the hologram; and wherein a distance d where f is the focal point of a Fourier transform lens.