HOLOGRAM REPRODUCTION DEVICE AND HOLOGRAM REPRODUCTION METHOD

摘要

There is provided a hologram reproduction device whose size can be reduced. The hologram reproduction device reproduces recorded information from a recorded recording medium obtained by recording a diffraction grating area generated by interference between a reference light beam and a signal light beam when the reference light beam which is coherent and the signal light beam which has been spatially modulated in accordance with recording information are applied on the same optical axis to the recording medium. The hologram reproduction device includes: a light source unit for emitting a coherent light beam; a light beam irradiation unit for irradiating the light beam to the diffraction grating area of the recording medium; a light collecting unit for collecting the reproduction light beam reproduced by irradiating the light beam to the diffraction grating area, toward the convergence position; an incident light processing unit arranged at the convergence position for separating the Fourier 0-dimension component from the reproduction light beam and the diffraction light component from the reproduction light beam; and a detection unit for detecting the recording information from the diffraction light component.