发明公开
EP2256726A1 Holographic storage system with reduced noise
审中-公开
Holographisches Speichersystem mit reduziertem Rauschen
- 专利标题： Holographic storage system with reduced noise
- 专利标题（中）： Holographisches Speichersystem mit reduziertem Rauschen
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申请号： EP09305485.6申请日： 2009-05-27
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公开(公告)号： EP2256726A1公开(公告)日： 2010-12-01
- 发明人: Malki, Oliver , Przygodda, Frank , Trautner, Heiko
- 申请人： Thomson Licensing
- 申请人地址： 1-5, rue Jeanne d'Arc 92130 Issy-les-Moulineaux FR
- 专利权人： Thomson Licensing
- 当前专利权人： Thomson Licensing
- 当前专利权人地址： 1-5, rue Jeanne d'Arc 92130 Issy-les-Moulineaux FR
- 代理机构： Schmidt-Uhlig, Thomas
- 主分类号： G11B7/0065
- IPC分类号： G11B7/0065
摘要：
The present invention relates to an apparatus (1) and a method for reading from holographic storage media (13), and more specifically to an apparatus (1) and a method for reading from holographic storage media (13) with reduced noise.
According to the invention, a light source (2) is provided for generating at least a reference beam (5), and an objective lens (12) for focusing the reference beam (5) into the holographic storage medium in order to generate a reconstructed object beam (14). One or more optical elements (12, 15) within the optical path of the reference beam (5) or the reconstructed object beam are mounted on at least one mechanical modulator (32), which oscillates with an oscillation frequency.
According to the invention, a light source (2) is provided for generating at least a reference beam (5), and an objective lens (12) for focusing the reference beam (5) into the holographic storage medium in order to generate a reconstructed object beam (14). One or more optical elements (12, 15) within the optical path of the reference beam (5) or the reconstructed object beam are mounted on at least one mechanical modulator (32), which oscillates with an oscillation frequency.
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