Title:
OPTICAL-INFORMATION RECORDING AND REPRODUCING METHOD AND OPTICAL-INFORMATION RECORDING AND REPRODUCING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/017020
Kind Code:
A1
Abstract:
Provided is a holographic optical-information recording and reproducing device and optical-information recording and reproducing method capable of increasing recording capacity with a simple configuration. An example of the solution is an optical-information recording and reproducing method characterized by including: a first recording step for forming a first hologram at a predetermined position in an optical-information recording medium using the interference between a first signal beam and a first reference beam; and a second recording step for forming a second hologram adjacent to the first hologram using the interference between a second signal beam and a second reference beam. The method is also characterized in that, in the first recording step or the second recording step, the first beam waist of the first signal beam in the first hologram and the second beam waist of the second signal beam in the second hologram are made to overlap each other by a predetermined amount in a beam-waist plane in the optical-information recording medium, and the incident angle of the first reference beam when forming the first hologram and the incident angle of the second reference beam when forming the second hologram are made to deviate from each other by a predetermined amount.
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Inventors:
NAGASAWA MITSURU (JP)
NAKAI NOBUO (JP)
SHIMADA KENICHI (JP)
ISHII TOSHIKI (JP)
YAMAZAKI KAZUYOSHI (JP)
NAKAI NOBUO (JP)
SHIMADA KENICHI (JP)
ISHII TOSHIKI (JP)
YAMAZAKI KAZUYOSHI (JP)
Application Number:
PCT/JP2014/070297
Publication Date:
February 04, 2016
Filing Date:
August 01, 2014
Export Citation:
Assignee:
HITACHI CONSUMER ELECTRONICS (JP)
International Classes:
G11B7/0065; G03H1/04; G03H1/30; G11B7/135
Domestic Patent References:
| WO2008001434A1 | 2008-01-03 |
Foreign References:
| JP2009087448A | 2009-04-23 | |||
| JP2011013531A | 2011-01-20 | |||
| JP2008071434A | 2008-03-27 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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