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Title:
OPTICAL RECORDING METHOD AND OPTICAL RECORDING/REPRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/026115
Kind Code:
A1
Abstract:
The present invention, in which optical recording is performed, is provided with: a step in which first holographic multiplex recording is performed by shining a plurality of first signal beams and a plurality of first reference beams continuously over time, in a state in which the respective polarization states thereof are changed, on a prescribed recording region of a recording medium that has a polarization-sensitive layer comprising a material that exhibits photoinduced birefringence, in which exposure to light causes refractive-index anisotropy; and a step in which second holographic multiplex recording is performed by exposing the aforementioned recording region of the recording medium, in a state in which the Bragg conditions of said recording medium are changed continuously over time, to a plurality of second signal beams and a plurality of second reference beams each synchronized with the changes in the Bragg conditions of the recording medium.

Inventors:
ANDO, Toshio (46-80, Oaza Nakabaru Sakinohama, Tobata-ku, Kitakyushu-sh, Fukuoka 03, 〒8048503, JP)
安藤 敏男 (〒03 福岡県北九州市戸畑区大字中原先の浜46-80 新日鐵化学株式会社内 Fukuoka, 〒8048503, JP)
SHIMIZU, Takehiro (46-80, Oaza Nakabaru Sakinohama, Tobata-ku, Kitakyushu-sh, Fukuoka 03, 〒8048503, JP)
清水 健博 (〒03 福岡県北九州市戸畑区大字中原先の浜46-80 新日鐵化学株式会社内 Fukuoka, 〒8048503, JP)
MASAKI, Kazuyoshi (14-1, Sotokanda 4-chome, Chiyoda-k, Tokyo 21, 〒1010021, JP)
Application Number:
JP2011/004689
Publication Date:
March 01, 2012
Filing Date:
August 24, 2011
Export Citation:
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Assignee:
NIPPON STEEL CHEMICAL CO., LTD. (14-1, Sotokanda 4-chome Chiyoda-k, Tokyo 21, 〒1010021, JP)
新日鐵化学株式会社 (〒21 東京都千代田区外神田四丁目14番1号 Tokyo, 〒1010021, JP)
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (AIST) (3-1 Kasumigaseki 1-chome, Chiyoda-ku Tokyo, 21, 〒1008921, JP)
独立行政法人産業技術総合研究所 (〒21 東京都千代田区霞ヶ関一丁目3番1号 Tokyo, 〒1008921, JP)
ANDO, Toshio (46-80, Oaza Nakabaru Sakinohama, Tobata-ku, Kitakyushu-sh, Fukuoka 03, 〒8048503, JP)
安藤 敏男 (〒03 福岡県北九州市戸畑区大字中原先の浜46-80 新日鐵化学株式会社内 Fukuoka, 〒8048503, JP)
SHIMIZU, Takehiro (46-80, Oaza Nakabaru Sakinohama, Tobata-ku, Kitakyushu-sh, Fukuoka 03, 〒8048503, JP)
International Classes:
G11B7/0065; G02B5/30; G03H1/02; G03H1/26; G11B7/0045; G11B7/135
Attorney, Agent or Firm:
SAKURA PATENT OFFICE, p.c. et al. (Kanda Higashiyama Bldg, 1 Kandata-cho 2-chome, Chiyoda-k, Tokyo 46, 〒1010046, JP)
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Claims: