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    Laser-optical writing and reading process using a thermally alterable reading layer containing liquid-crystalline compound
    1.
    发明授权
    Laser-optical writing and reading process using a thermally alterable reading layer containing liquid-crystalline compound 失效
    使用包含液晶化合物的热可变读取层的激光写入和读取过程

    公开(公告)号：US5097463A

    公开(公告)日：1992-03-17

    申请号：US154592

    申请日：1988-02-10

    申请人： Gerhard Wagenblast ,  Karl-Heinz Etzbach ,  Bernd Hisgen

    发明人： Gerhard Wagenblast ,  Karl-Heinz Etzbach ,  Bernd Hisgen

    IPC分类号： B41M5/36 ,  G11B7/0055 ,  G11B7/12 ,  G11B7/24

    CPC分类号： G11B7/12 ,  G11B7/00555 ,  G11B7/24

    摘要： A laser-optical write and read process whereby a thermally alterable recording layer which contains liquid-crystalline compounds in homogeneous planar orientation and forms part of a multilayer, sheet-like recording material is written by means of a write laser beam with analogue or digital data in the form of thermally altered areas, whereafter the written data are read by means of a read laser beam, including: analyzing the light transmitted or reflected by the recording material, and reading the data by determining the polarization-optical contrast between the thermally altered and the unaltered areas and/or utilizing for this purpose the interference of the light rays which form from the laser lightwaves in a Gaussian intensity distribution owing to the different phase velocities of the light in the center of thermally altered areas on the one hand and their thermally unaltered surroundings on the other.

    摘要翻译： 激光光学写入和读取处理，其中通过具有模拟或数字数据的写入激光束来写入包含均匀平面取向中的液晶化合物并形成多层片状记录材料的一部分的热改性记录层 以热改变区域的形式，之后通过读取的激光束读取写入的数据，包括：分析由记录材料透射或反射的光，以及通过确定热改变的偏振光学对比度来读取数据 和未改变的区域和/或利用这一目的，一方面由于热变化区域的中心的光的相位速度的不同，激光产生的光线的干涉以高斯分布强度分布，以及它们 另一方面热不变的环境。

    Reversible or irreversible production of an image
    5.
    发明授权
    Reversible or irreversible production of an image 失效

    公开(公告)号：US5538824A

    公开(公告)日：1996-07-23

    申请号：US248552

    申请日：1994-05-24

    申请人： Volker Bach ,  Karl-Heinz Etzbach ,  Harald Fuchs ,  Karl Siemensmeyer ,  Gerhard Wagenblast

    发明人： Volker Bach ,  Karl-Heinz Etzbach ,  Harald Fuchs ,  Karl Siemensmeyer ,  Gerhard Wagenblast

    IPC分类号： B41M5/36 ,  B41M5/28 ,  G02F1/1333 ,  G02F1/141 ,  G03G5/00 ,  G03G5/024 ,  G03G13/056 ,  G03G15/056 ,  G03G13/00

    CPC分类号： B41M5/281 ,  G02F1/133365 ,  G03G13/056 ,  G03G15/056 ,  G03G5/024 ,  G02F1/141

    摘要： In a novel process for the reversible or irreversible production of an image by the imagewise action of energy on a recording layer, resulting in a pattern of surface charges which corresponds to the imagewise action of the energy, on the surface of the recording layer, the recording layer used is one which contains or consists of an organic material which solidifies in glassy form, is nonphotoconductive or only slightly photoconductive and has permanent dipoles, whereinthe pattern of surface charges is produced, without or almost without formation of free charge carriers, by reversible imagewise orientation of some or all of the permanent dipoles present in the recording layer, with the aid of an electric field applied imagewise.The novel process is advantageously carried out using a novel apparatus which comprises a suitable recording element, apparatus for the imagewise action of an electric field on the recording layer of the recording element and a counter-electrode which is in direct, non-frictional contact with the recording layer and can be removed again therefrom. The pattern of surface charges which is produced by the novel process can be treated with liquid or solid toners. The resulting toner image can then either be fixed on the recording layer or transferred from the recording layer to another surface, after which the pattern of surface charges can be deleted by uniform action of energy. Thereafter, a further image can be produced. In this way, it is possible to produce photocopies without the high voltage sources required in the conventional electrophotographic processes having to be used.

    Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on
    7.
    发明授权
    Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on 失效
    单体及其用于生产可以反复擦除并记录的激光光学记录元件

    公开(公告)号：US5187248A

    公开(公告)日：1993-02-16

    申请号：US814516

    申请日：1991-12-30

    申请人： Karl-Heinz Etzbach ,  Gerhard Wagenblast ,  Wolfgang Brox ,  Axel Paul ,  Volker Bach

    发明人： Karl-Heinz Etzbach ,  Gerhard Wagenblast ,  Wolfgang Brox ,  Axel Paul ,  Volker Bach

    IPC分类号： C09K19/38 ,  G11B7/25

    CPC分类号： G11B7/25 ,  C09K19/3857

    摘要： Novel laser-optical recording elements which can be repeatedly erased and recorded on contain recording layers (a) which exhibit enantiotropic, ferroelectric smectic liquid crystalline (S.sub.c*) behavior, so that they can be switched back and forth between two thermodynamically stable, optically distinguishable ferroelectric smectic liquid crystalline S.sub.C* order states on exposure to a laser beam of sufficient luminous power, by applying an external electric field. The recording layers (a) themselves consist mainly or exclusively of novel polymers P having chiral mesogenic side groups. The novel polymers P are prepared using the novel monomers of the general formula I ##STR1## where R is hydrogen, chlorine or methyl, A is a flexible space-maintaining long-chain molecular moiety, and C is an optically active chiral molecular moiety and B is a mesogenic molecular moiety composed of at least three aromatic nuclei which are bonded linearly or virtually linearly to one another, or they are prepared using the novel monomers I which contain specially selected molecular moieties B in a novel combination with selected molecular moieties C.

    摘要翻译： 可以重复地擦除并记录包含记录层（a）的新型激光 - 光学记录元件，其表现出对称性，铁电近晶液晶（Sc *）行为，使得它们可以在两个热力学稳定的光学可区分之间来回切换 通过施加外部电场，暴露于具有足够的发光功率的激光束的铁电近晶液晶SC *次序状态。 记录层（a）本身主要或全部由具有手性介晶侧基的新型聚合物P组成。 新型聚合物P使用通式I（I）的新型单体制备，其中R是氢，氯或甲基，A是柔性保持空间的长链分子部分，C是光学活性的手性 分子部分和B是由至少三个芳族核组成的介晶分子部分，其彼此线性或实质上线性地键合，或者它们使用含有特定选择的分子部分B的新型单体I与选择的分子 部分C.

    Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on
    10.
    发明授权
    Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on 失效
    单体及其用于生产可以反复擦除并记录的激光光学记录元件

    公开(公告)号：US5212027A

    公开(公告)日：1993-05-18

    申请号：US814517

    申请日：1991-12-30

    申请人： Karl-Heinz Etzbach ,  Gerhard Wagenblast ,  Wolfgang Brox ,  Axel Paul ,  Volker Bach

    发明人： Karl-Heinz Etzbach ,  Gerhard Wagenblast ,  Wolfgang Brox ,  Axel Paul ,  Volker Bach

    IPC分类号： C08F20/36 ,  C09K19/38 ,  G11B7/0055 ,  G11B7/24 ,  G11B7/25

    CPC分类号： G11B7/24 ,  C08F20/36 ,  C09K19/3857 ,  C09K19/3861 ,  G11B7/00555 ,  G11B7/25 ,  Y10S430/146 ,  Y10T428/10

    摘要： Novel laser-optical recording elements which can be repeatedly erased and recorded on contain recording layers (a) which exhibit enantiotropic, ferroelectric smectic liquid crystalline (S.sub.c*) behavior, so that they can be switched back and forth between two thermodynamically stable, optically distinguishable ferroelectric smectic liquid crystalline S.sub.c* order states on exposure to a laser beam of sufficient luminous power, by applying an external electric field. The recording layers (a) themselves consist mainly or exclusively of novel polymers P having chiral mesogenic side groups. The novel polymers P are prepared using the novel monomers of the general formula I ##STR1## where R is hydrogen, chlorine or methyl, A is a flexible space-maintaining long-chain molecular moiety, and C is an optically active chiral molecular moiety and B is a mesogenic molecular moiety composed of at least three aromatic nuclei which are bonded linearly or virtually linearly to one another,or they are prepared using the novel monomers I which contain specially selected molecular moieties B in a novel combination with selected molecular moieties C.

    摘要翻译： 可以重复地擦除并记录包含记录层（a）的新型激光 - 光学记录元件，其表现出对称性，铁电近晶液晶（Sc *）行为，使得它们可以在两个热力学稳定的光学可区分之间来回切换 通过施加外部电场，暴露于具有足够发光功率的激光束的铁电近晶液晶Sc *阶数。 记录层（a）本身主要或全部由具有手性介晶侧基的新型聚合物P组成。 新型聚合物P使用通式I（I）的新型单体制备，其中R是氢，氯或甲基，A是柔性保持空间的长链分子部分，C是光学活性的手性 分子部分和B是由至少三个芳族核组成的介晶分子部分，其彼此线性或实质上线性地键合，或者它们使用含有特定选择的分子部分B的新型单体I与选择的分子 部分C.