发明授权
- 专利标题: Volume holographic memory and optical information recording/reproducing apparatus
- 专利标题(中): 体积全息存储器和光学信息记录/再现装置
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申请号: US09396663申请日: 1999-09-15
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公开(公告)号: US06594220B1公开(公告)日: 2003-07-15
- 发明人: Hajime Matsushita , Tomomitsu Kouno , Hideki Hatano , Yoshihisa Itoh , Satoru Tanaka , Takashi Yamaji , Fumitaka Kotaka
- 申请人: Hajime Matsushita , Tomomitsu Kouno , Hideki Hatano , Yoshihisa Itoh , Satoru Tanaka , Takashi Yamaji , Fumitaka Kotaka
- 优先权: JP10-263227 19980917; JP11-088098 19990330
- 主分类号: G11B700
- IPC分类号: G11B700
摘要:
A volume holographic memory for recording three-dimensional distribution of interference fringes generated owing to interference between signal light and reference light is provided, wherein the volume holographic memory is formed into a cylindrical shape. Also an optical information recording/reproducing apparatus is provided which incorporates an interference-fringe generating unit for generating interference fringes formed owing to interference between signal light and reference light; a storage unit for storing three-dimensional distribution of the interference fringes generated by the interference-fringe generating unit; a detecting unit for detecting diffracted light obtainable from the storage unit by irradiating the storage unit with reference light; and a reproducing unit for reproducing signal light from diffracted light detected by the detecting unit, wherein the storage unit is constituted by a volume holographic memory having a cylindrical shape.