Title:
光情報再生装置および光情報記録再生装置
Document Type and Number:
Japanese Patent JP6078634
Kind Code:
B2
Abstract:
A position control method at high speed and high accuracy for recorded hologram is obtained. An optical information recording and reproducing device records an interference fringe obtained by interfering reference beam and signal beam as a hologram on an optical information recording medium and reproduces information using the reference beam from the hologram recorded on the optical information recording medium. The optical information recording and reproducing device includes: a detection light generation unit that generates light including a part of the signal beam as detection light; a detection light incident unit that causes the detection light to be incident on the recorded hologram; and a light detection unit that detects a light amount of diffracted beam by the detection light incident on the hologram. A position of the recorded hologram is detected based on an output of the light detection unit.
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Inventors:
Nakamura Yusuke
Toshiki Ishii
Toshiki Ishii
Application Number:
JP2015507759A
Publication Date:
February 08, 2017
Filing Date:
March 27, 2013
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G11B7/135; G11B7/0065
Domestic Patent References:
| JP2005166103A | 2005-06-23 | |||
| JP2004171611A | 2004-06-17 | |||
| JP2009080890A | 2009-04-16 | |||
| JP2007304263A | 2007-11-22 | |||
| JP2012154979A | 2012-08-16 | |||
| JP2005166103A | 2005-06-23 | |||
| JP2004171611A | 2004-06-17 | |||
| JP2009080890A | 2009-04-16 | |||
| JP2007304263A | 2007-11-22 | |||
| JP2012154979A | 2012-08-16 |
Attorney, Agent or Firm:
Manabu Inoue
Yuji Toda
Shigemi Iwasaki
Yuji Toda
Shigemi Iwasaki