HOLOGRAM MULTIPLE RECORDING APPARATUS, METHOD FOR HOLOGRAM MULTIPLE RECORDING AND METHOD FOR REPRODUCING HOLOGRAM

摘要

PROBLEM TO BE SOLVED: To provide an apparatus which has a simple optics, which can be minimized and which is excellent for practical application, and to carry out hologram multiple recording and reproducing with low crosstalk.;SOLUTION: A hologram is recorded by allowing information light 1 having two-dimensional information to enter a photorefractive medium 13, while allowing speckle generating light 9 which generates beam-fanning speckles 6 to enter the photorefractive medium 13, and allowing the beam-fanning speckles 6 and the information light 1 to intersect with each other in the photorefractive medium 13 to produce interference fringes in the medium 13. This operation is repeated by varying the incident conditions of the speckle generating light 9 in each operation for multiple recording of holograms corresponding to the input information light 1 by respective recording operations in one portion of the photorefractive medium 13. On reproducing the hologram, the photorefractive medium 13 is irradiated with speckle generating light 9 under the same conditions as the irradiation conditions of speckle generating light for recording the individual hologram.;COPYRIGHT: (C)2005,JPO&NCIPI