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公开(公告)号:EP1918914A1
公开(公告)日:2008-05-07
申请号:EP06123539.6
申请日:2006-11-06
IPC分类号: G11B7/0065
CPC分类号: G11B7/0065 , G03H1/0404 , G03H1/265 , G03H1/28 , G11B7/083 , G11B7/1353 , G11B7/1365 , G11B7/1395
摘要: The present invention relates to a coaxial type apparatus (1) for reading from and/or writing to holographic storage media (18) with multiple reference beams (7", 7"'). The invention further relates to a beam generator (21) and a filter (12) for use in such an apparatus (1).
According to the invention, in an apparatus (1) for reading from and/or writing to a holographic storage medium (18), with a coaxial arrangement of three or more reference beams (7", 7"') and an object beam (6) or a reconstructed object beam (26), the reference beams (7", 7"') are arranged on a circle around the object beam (6) in a Fourier plane of the apparatus (1). A beam generator (21) generates the three or more reference beams (7", 7"') from an incoming reference beam (7). A filter (12) low-pass filters the object beam (6) and rotates the polarization of the three or more reference beams (7", 7"').摘要翻译: 本发明涉及一种用于从具有多个参考光束(7“,7”')的全息存储介质(18)读取和/或写入的同轴型设备(1)。 本发明还涉及用于这种装置(1)中的光束发生器(21)和滤光器(12)。 根据本发明,在用于从全息存储介质(18)读取和/或写入到具有三个或更多个参考光束(7“,7”')和物体光束( 6)或重建的物体光束(26)中,参考光束(7“,7”')在装置(1)的傅立叶平面中围绕物体光束(6)布置在圆周上。 光束发生器(21)从入射参考光束(7)产生三个或更多个参考光束(7“,7”')。 过滤器(12)对物体光束(6)进行低通滤光并旋转三个或更多个参考光束(7“,7”')的偏振。
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公开(公告)号:EP1921613A1
公开(公告)日:2008-05-14
申请号:EP06123657.6
申请日:2006-11-08
IPC分类号: G11B7/0065 , G11B7/125 , G11B7/16
CPC分类号: G11B7/0065 , G03H1/04 , G03H1/0465 , G03H2222/35 , G11B7/1381 , G11B2007/13727
摘要: The present invention relates to an apparatus for reading from and/or writing to holographic storage media (8), and more specifically to an apparatus for reading from and/or writing to holographic storage media (8) having an apodization filter (42).
According to the invention, an apparatus for reading from and/or writing to a holographic storage medium (8), with a collinear split aperture arrangement of a reference beam (21) and an object beam (20) or a reconstructed object beam (30), includes an apodization filter (42) for the reference beam (21).摘要翻译: 本发明涉及用于从全息存储介质(8)读取和/或向全息存储介质(8)写入的设备,并且更具体地涉及用于从具有变迹滤波器(42)的全息存储介质(8)读取和/或向其写入的设备。 根据本发明,一种用于从全息存储介质(8)读取和/或写入全息存储介质(8)的设备具有参考光束(21)和物体光束(20)或重建物体光束(30)的共线分裂孔径布置 )包括用于参考光束(21)的变迹滤波器(42)。
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