HOLOGRAM REPRODUCTION METHOD, OPTICAL PHASE-TO-INTENSITY CONVERSION METHOD, DECODING METHOD OF ENCRYPTED PHASE-MODULATED SIGNAL, HOLOGRAM RECORDING AND REPRODUCTION DEVICE, AND OPTICAL PHASE-TO-INTENSITY CONVERTER

Title:

Document Type and Number:

WIPO Patent Application WO/2013/008641

Kind Code:

A1

Abstract:

A phase distribution signal is generated by using an SLM (11) to phase-modulate light emitted from a laser source (10). By focusing the phase distribution signal via an objective lens (12) onto a hologram recording medium (13), the phase distribution signal is recorded in the hologram recording medium (13). For reproduction, the same optical system is used to irradiate the reproduction-time read-out beam onto the hologram recording medium (13), and the generated optical intensity signal is read in an imaging element (15).

Inventors:

OKAMOTO ATSUSHI (JP)
TAKABAYASHI MASANORI (JP)

Application Number:

PCT/JP2012/066607

Publication Date:

January 17, 2013

Filing Date:

June 28, 2012

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Assignee:

UNIV HOKKAIDO NAT UNIV CORP (JP)
OKAMOTO ATSUSHI (JP)
TAKABAYASHI MASANORI (JP)

International Classes:

G11B7/0065; G03H1/10; G03H1/22

Foreign References:

JP2002319285A	2002-10-31
JP2000075139A	2000-03-14

Other References:

TSUTOMU SHIMURA, SYSTEMS, DEVICES AND MATERIALS FOR THE HOLOGRAPHIC DATA STORAGE, 28 April 2006 (2006-04-28), pages 79 - 90

Attorney, Agent or Firm:

HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)

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