Patent ID: 6798547
Filing Date: 2004-09-28
Classification: G03H,G11B

Abstract:
A method of recording holograms, comprising:generating a first signal beam from a signal-beam source and a first reference beam from a reference-beam source; recording a first hologram in a holographic medium from an interference between the first signal beam and the first reference beam; shifting the reference-beam source after the act of recording the first hologram, wherein shifting the reference-beam source includes shifting for shift selectivity in a plane of the holographic medium; generating a second signal beam from the signal-beam source and a second reference beam from the reference-beam source after the act of shifting the reference-beam source following the recording of the first hologram; and recording a second hologram in the holographic medium from an interference between the second signal beam and the second reference beam, wherein the first hologram and the second hologram are overlapping.