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Title:
OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING APPARATUS, AND OPTICAL INFORMATION RECORDING AND REPRODUCING METHOD
Document Type and Number:
WIPO Patent Application WO/2016/208046
Kind Code:
A1
Abstract:
Provided are: an optical information recording and reproducing apparatus that utilizes holography and that can perform reproduction with fine quality even when recording is performed at high recording density; and a method therefor. This optical information recording and reproducing apparatus for recording and reproducing, as a hologram, a pattern of interference between reference light and signal light on/from optical information recording medium by utilizing holography is characterized by being provided with: a light source that emits laser light; an optical element that separates the laser light into reference light and signal light; a phase control unit that controls the phase of the signal light or the reference light during recording; and a photodetector that detects signal light reproduced through irradiation of the optical information recording medium with the reference light, wherein when reproduction light reproduced from a first hologram when irradiation with the reference light is performed is defined as first reproduction light and reproduction light reproduced from a second hologram recorded on a page adjacent to a page on which the first hologram is recorded is defined as second reproduction light, the phase control unit controls the phase of the reference light or the signal light during recording such that the phase difference between the first reproduction light and the second reproduction light is at a predetermined value.

Inventors:
HOSAKA Makoto (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
ISHII Toshiki (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2015/068440
Publication Date:
December 29, 2016
Filing Date:
June 26, 2015
Export Citation:
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Assignee:
HITACHI CONSUMER ELECTRONICS CO., LTD. (292 Yoshida-cho, Totsuka-ku Yokohama-sh, Kanagawa 17, 〒2440817, JP)
International Classes:
G11B7/0065; G03H1/04; G03H1/22; G03H1/26; G11B7/135; G11B20/10
Domestic Patent References:
2015-05-14
Foreign References:
JP2009087448A2009-04-23
JP2013114716A2013-06-10
Attorney, Agent or Firm:
INOUE Manabu et al. (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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