Patent ID: 7515320
Filing Date: 2009-04-07
Classification: G11B

Abstract:
1. A holographic device that reproduces information by irradiating light beams emitted from a light beam generator onto a recording medium formed with a hologram, wherein the light beam generator has a substrate and a plurality of light emitting units provided on the substrate, each of the plurality of light emitting units being composed of a light source for emitting laser light having a wavelength range wider than a wavelength range of single-mode laser light, a condensing means is provided between the light beam generator and the recording medium in order to condense a plurality of light beams emitted from the light emitting units onto approximately the same location of the recording medium, and the light beam generator sequentially outputs the plurality of light beams from the plurality of light emitting units, the plurality of light beams being irradiated onto the recording medium at different incident angles, the wider wavelength range of the light beams allowing to reproduce the hologram even if an incident angle of the light beams with respect to the recording medium deviates.