Apparatus for recording and reproducing hologram

摘要

A hologram recording and reproducing apparatus including: a coherent light source; a beam splitter which splits a beam emitted from the coherent light source into a signal beam and a reference beam; a signal beam forming unit which modulates the signal beam split and directs the modulated signal beam onto a hologram recording medium; and a reference beam forming unit which directs the reference beam to be irradiated onto a location on the hologram recording medium which overlaps with a location on the hologram recording medium on which the signal beam is incident, wherein the signal beam forming unit includes: a first light guide member which transmits the signal beam split by the beam splitter; a spatial light modulator (SLM) which modulates the signal beam transmitted through the first light guide member; and a holographic Fourier transformation optical device which focuses the modulated signal beam onto the hologram recording medium.

主权项

1. A hologram recording and reproducing apparatus comprising:
a coherent light source; a beam splitter which splits a beam emitted from the coherent light source into a signal beam and a reference beam; a signal beam forming unit which modulates the signal beam and irradiating the modulated signal beam onto a hologram recording medium; and a reference beam forming unit which directs the reference beam onto a location on the hologram recording medium which overlaps with a location on the hologram recording medium on which the signal beam is incident, wherein the signal beam forming unit comprises: a first light guide member which directs the signal beam to a spatial light modulator (SLM) by total internal reflection of the signal beam traveling inside the first light guide member; the SLM which modulates the signal beam; and a holographic Fourier transformation optical device which focuses the modulated signal beam onto the hologram recording medium.