Hologram recording device and hologram recording method

Details Hologram recording device and hologram recording method Hologram recording device and hologram recording method

2008-11-13

2009-12-22

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Holographic system or element

For producing or reconstructing images from multiple holograms

C369S103000

Reexamination Certificate

active

07636185

ABSTRACT:
A hologram recorder records a hologram in a hologram recording medium by interference of a recording beam irradiated at a predetermined incident angle to the medium via a spatial light modulator incliningly in a predetermined direction with a reference beam irradiated incliningly in an opposite direction to the recording beam so that the beams crosses at a predetermined crossing angle. The recorder includes a beam modulator for converting a Gaussian-beam having a Gaussian-distribution of intensity into a parallel beam having an intensity distribution tending to be uniform and allowing the parallel beam to travel to the spatial modulator as the recording beam. The Gaussian-beam has a center axis decentered from an optical axis of the beam modulator in a decentering direction including a directional component of the predetermined direction in which the recording beam is inclined or an opposite directional component thereto.

REFERENCES:
patent: 6088321 (2000-07-01), Yamaji et al.
patent: 6256281 (2001-07-01), Tanaka et al.
patent: 7295356 (2007-11-01), King
patent: 2004/0246556 (2004-12-01), Tsukagoshi
patent: A 2003-43904 (2003-02-01), None

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