Title:
HOLOGRAPHIC STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/068250
Kind Code:
A1
Abstract:
The problem addressed by the present invention is to increase the use efficiency of a holographic storage medium, achieving an increase in the number of storage layers, and to achieve favorable and stable storage maintaining the storage quality of each pixel of a page interior and page exterior. As a solution, the present invention is provided with: a phase mask that adds phase information to signal light; a phase mask drive unit that drives the phase mask; a phase mask control unit that controls the phase mask drive unit; and a phase mask drive speed detection unit that detects the drive speed of the phase mask. When the phase mask drive speed obtained by the phase mask drive speed detection unit is contained within a predetermined range, the storage of information is executed.
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Inventors:
YAMADA KENICHIRO (JP)
ONOE SHINSUKE (JP)
NISHIMURA KOUICHIROU (JP)
ONOE SHINSUKE (JP)
NISHIMURA KOUICHIROU (JP)
Application Number:
PCT/JP2013/080180
Publication Date:
May 14, 2015
Filing Date:
November 08, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G11B7/0065; G03H1/04; G11B7/135
Domestic Patent References:
| WO2010116727A1 | 2010-10-14 |
Foreign References:
| JPH07104647A | 1995-04-21 | |||
| JP2005091182A | 2005-04-07 | |||
| JP2013109795A | 2013-06-06 | |||
| JP2005250038A | 2005-09-15 | |||
| JP2007121453A | 2007-05-17 | |||
| JP2007194479A | 2007-08-02 |
Attorney, Agent or Firm:
INOUE, Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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