发明公开
- 专利标题: Recording medium and reproducing method therefor
- 专利标题(中): 记录介质及其再现方法
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申请号: EP90118221.2申请日: 1990-09-21
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公开(公告)号: EP0418930A3公开(公告)日: 1992-07-29
- 发明人: Tsujioka, Tsuyoshi , Tatezono, Fumio , Matsuura, Koutaro , Irie, Masahiro
- 申请人: SANYO ELECTRIC CO., LTD. , Irie, Masahiro
- 申请人地址: 18, Keihanhondori 2-chome Moriguchi-shi, Osaka JP
- 专利权人: SANYO ELECTRIC CO., LTD.,Irie, Masahiro
- 当前专利权人: SANYO ELECTRIC CO., LTD.,Irie, Masahiro
- 当前专利权人地址: 18, Keihanhondori 2-chome Moriguchi-shi, Osaka JP
- 代理机构: Glawe, Delfs, Moll & Partner
- 优先权: JP246693/89 19890922; JP80125/90 19900328
- 主分类号: G11B7/24
- IPC分类号: G11B7/24
摘要:
recording medium comprises a recording layer containing a material whose optical rotatory power is changed, a birefringent layer for changing a state of the polarization of a beam, and a reflecting layer for reflecting the beam transmitted through the recording layer and the birefringent layer to reintroduce the beam into the birefringent layer and the recording layer. A method of reproducing information from this recording medium applies a polarized light beam to the recording medium and detects change of the polarized state of the polarized light beam reflected from the recording medium, thereby reading the information recorded in the recording layer. According to the inventive recording medium and reproducing method, the information can be reproduced through optical rotatory power.
公开/授权文献
- EP0418930B1 Recording medium and reproducing method therefor 公开/授权日:1996-01-31
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