HOLOGRAM RECORDING DEVICE AND HOLOGRAM RECORDING METHOD

摘要

A hologram recording device (A) in which a recording light (S) is applied to a hologram recording medium (B) through a spatial optical modulator (2) in such a way that the recording light (S) is tilted to form a predetermined incident angle, a reference light (R) is applied in such a way that the reference light (R) is tilted in the reverse direction to that of the recording light (S) to form a predetermined cross angle, and a hologram is recorded on the hologram recording medium (B) thanks to interference between the recording light (S) and the reference light (R). The hologram recording device (A) comprises beam modulating means (1) for converting a Gaussian beam having an intensity distribution similar to the Gauze distribution into a parallel beam having an intensity distribution with a uniform tendency and directing the parallel beam to the spatial optical modulator (2) as a recording light (S). The center axis (Gs) of the Gaussian beam is eccentric from the optical axis (1A) of the beam modulating means (1), and the eccentricity direction includes a component of the same direction in which the recording light (S) is tilted with respect to the hologram recording medium (B) or the opposite direction.