Hologram recording medium, hologram reproducing apparatus, hologram reproducing method, and hologram sheet

摘要

A hologram recording medium includes a first element hologram and a second element hologram. On the first element hologram, main data is recorded such that the main data is converted into a two-dimensional image, object light of the two-dimensional image is interfered with recording reference light, and an interference fringe produced as a result of the interference is recorded on the first element hologram. On the second element hologram, simplified-form data representing the content of the main data using a smaller data size than the data size of the main data is recorded such that the simplified-form data is converted into a two-dimensional image, object light of the two-dimensional image is interfered with recording reference light, and an interference fringe produced as a result of the interference is recorded on the second element hologram.