Multilayer coaxial holographic storage system
    1.
    发明公开
    Multilayer coaxial holographic storage system 审中-公开
    Koaxiales holografisis Mehrschicht-Speichersystem

    公开(公告)号:EP2228793A1

    公开(公告)日:2010-09-15

    申请号:EP09305225.6

    申请日:2009-03-11

    申请人: Thomson Licensing

    IPC分类号: G11B7/0065 G11B7/135

    摘要: The present invention relates to an apparatus (1) for reading from and/or writing to a multilayer holographic storage medium (12) with a coaxial arrangement of a reference beam (2a) and an object beam (2b) or a reconstructed object beam (2c). The apparatus (1) has an objective lens (11) for focusing the reference beam (2a) into the multilayer holographic storage medium (12). According to the invention the reference beam (2a) has a focal point behind or before a reflective layer (13) of the multilayer holographic storage medium (12).

    摘要翻译: 本发明涉及一种用于使用参考光束(2a)和物体光束(2b)或重建物体光束(2b)的同轴布置从多层全息存储介质(12)读取和/或写入的装置(1) 2C)。 装置(1)具有用于将参考光束(2a)聚焦到多层全息存储介质(12)中的物镜(11)。 根据本发明,参考光束(2a)具有在多层全息存储介质(12)的反射层(13)之后或之前的焦点。

    Holographic recording medium and pickup for this medium
    2.
    发明公开
    Holographic recording medium and pickup for this medium 有权
    Holographisches Aufzeichnungsmedium und Methode zur Vorbereitung des Mediums

    公开(公告)号:EP2073203A1

    公开(公告)日:2009-06-24

    申请号:EP08305902.2

    申请日:2008-12-09

    IPC分类号: G11B7/24 G11B7/0065

    摘要: The present invention relates to a holographic recording medium (9) with an improved servo structure.
    The holographic recording medium (9) has a hologram layer (96) for storing holograms and a servo layer (92) for positioning a light beam for reading and/or recording of a hologram relative to the holographic recording medium. The servo layer (92) is an essentially flat dye recording layer (98). A holographic pickup (1) for use with such a holographic recording medium (9) includes a light source (13) for generating a light beam (14), which interacts with the dye recording layer (98) for recording servo information (99).

    摘要翻译: 本发明涉及具有改进的伺服结构的全息记录介质(9)。 全息记录介质(9)具有用于存储全息图的全息图层(96)和用于定位用于相对于全息记录介质读取和/或记录全息图的光束的伺服层(92)。 伺服层(92)是基本平坦的染料记录层(98)。 用于这种全息记录介质(9)的全息拾取器(1)包括用于产生光束(14)的光源(13),其与用于记录伺服信息(99)的染料记录层(98)相互作用, 。

    Holographic storage system using homodyne detection
    3.
    发明公开
    Holographic storage system using homodyne detection 审中-公开
    Holographisches Speichersystem mit homodyner Detektion

    公开(公告)号:EP2256729A1

    公开(公告)日:2010-12-01

    申请号:EP09305473.2

    申请日:2009-05-25

    摘要: The present invention relates to an apparatus (1) for reading from holographic storage media (13) using a homodyne detection scheme.
    According to the invention, the apparatus (1) for reading from a holographic storage medium (13), with a light source (2') for generating a reference beam (5) and a local oscillator beam (20), 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). The coherence length of the reference beam (5) and the local oscillator beam (20) is shorter than twice the distance between the objective lens (12) and the holographic storage medium (13).

    摘要翻译: 本发明涉及一种使用零差检测方案从全息存储介质(13)读取的装置(1)。 根据本发明,用于从全息存储介质(13)读取用于产生参考光束(5)的光源(2')和本地振荡器光束(20)的装置(1)和物镜 (12),用于将参考光束(5)聚焦到全息存储介质中,以便产生重建的物体光束(14)。 参考光束(5)和本地振荡器光束(20)的相干长度短于物镜(12)和全息存储介质(13)之间的距离的两倍。

    Optical recording medium and apparatus and method for reading from the medium
    4.
    发明公开
    Optical recording medium and apparatus and method for reading from the medium 审中-公开
    光记录介质和装置以及用于读取这种介质的方法

    公开(公告)号:EP2337026A1

    公开(公告)日:2011-06-22

    申请号:EP09306278.4

    申请日:2009-12-18

    申请人: Thomson Licensing

    摘要: The present invention relates to an optical recording medium (16) and to an apparatus (1) and a method for reading from the optical recording medium (16). The optical recording medium (16) is provided with one or more polarization rotating films (32, 36). An apparatus for reading from the optical recording medium (16) includes a light source (2) for generating a polarized light beam (3, 6, 7) and one or more variable polarization rotating elements (19, 30), which are located in an optical path of the light beam (3, 6, 7) before the optical recording medium (16) .

    摘要翻译: 本发明涉及光学记录介质(16)上,并在设备(1)和用于从光学记录介质(16)读取的方法。 的光记录介质(16)设置有一个或多个偏振旋转膜(32,36)。 用于从光学记录介质读取的设备(16)包括用于产生偏振光束的光源(2)(3,6,7)和一个或多个可变的偏振旋转元件(19,30),分别位于 的光学记录介质(16)之前的光束(3,6,7)的光路中。

    Holographic storage system with reduced noise
    5.
    发明公开
    Holographic storage system with reduced noise 审中-公开
    Holographisches Speichersystem mit reduziertem Rauschen

    公开(公告)号:EP2256726A1

    公开(公告)日:2010-12-01

    申请号:EP09305485.6

    申请日:2009-05-27

    申请人: Thomson Licensing

    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.

    摘要翻译: 本发明涉及一种从全息存储介质(13)读取的装置(1)和方法,更具体地涉及一种具有降低噪声的全息存储介质(13)的装置(1)和方法。 根据本发明,提供了一种用于产生至少参考光束(5)的光源(2)和用于将参考光束(5)聚焦到全息存储介质中的物镜(12),以便产生重建的 物体光束(14)。 在参考光束(5)或重构物体光束的光路内的一个或多个光学元件(12,15)安装在至少一个以振荡频率振荡的机械调制器(32)上。

    Holographic recording medium and method for preparing the same
    6.
    发明授权
    Holographic recording medium and method for preparing the same 有权
    制备该介质的全息记录介质和方法

    公开(公告)号:EP2073203B1

    公开(公告)日:2010-10-27

    申请号:EP08305902.2

    申请日:2008-12-09

    申请人: Thomson Licensing

    IPC分类号: G11B7/24 G11B7/0065

    摘要: The present invention relates to a holographic recording medium (9) with an improved servo structure. The holographic recording medium (9) has a hologram layer (96) for storing holograms and a servo layer (92) for positioning a light beam for reading and/or recording of a hologram relative to the holographic recording medium. The servo layer (92) is an essentially flat dye recording layer (98). A holographic pickup (1) for use with such a holographic recording medium (9) includes a light source (13) for generating a light beam (14), which interacts with the dye recording layer (98) for recording servo information (99).