Patent ID: 7595922

Claim:
A hologram reconstructing apparatus configured to irradiate a hologram recording medium with a reconstructing reference beam, the hologram recording medium storing an interference pattern of a signal beam spatially modulated by data displayed on a spatial modulator and a reference beam emitted simultaneously with the signal beam, and to reconstruct data by capturing a reconstruction signal beam generated at the hologram recording medium being irradiated, the hologram reconstructing apparatus comprising: image pickup means for receiving a partial reconstruction signal beam by a full light-receiving plane, the partial reconstruction signal beam constituting less than a whole of the reconstruction signal beam; moving means for relatively moving the light-receiving plane of the image pickup means within an irradiation range of the reconstruction signal beam to another position, said image pickup means receiving another partial reconstruction signal beam constituting less than the whole of the reconstruction signal beam at the another position; and an image processing unit configured to reconstruct the reconstruction signal beam by combining plural partial reconstruction signal beams that correspond to the entire irradiation range.