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    Optical data storage system with multiple write-once phase-change recording layers
    2.
    发明授权
    Optical data storage system with multiple write-once phase-change recording layers 失效
    具有多个一次写入相变记录层的光学数据存储系统

    公开(公告)号：US5555537A

    公开(公告)日：1996-09-10

    申请号：US497518

    申请日：1995-06-30

    申请人： Wayne I. Imaino ,  Hal J. Rosen ,  Kurt A. Rubin ,  Wade W.-C. Tang

    发明人： Wayne I. Imaino ,  Hal J. Rosen ,  Kurt A. Rubin ,  Wade W.-C. Tang

    IPC分类号： G11B7/0045 ,  G11B7/243 ,  G11B7/257 ,  G11B7/00 ,  G11B5/66 ,  G11B7/24

    CPC分类号： G11B7/257 ,  G11B7/24038 ,  G11B7/243 ,  G11B2007/24306 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/2432 ,  G11B2007/25706 ,  G11B2007/25708 ,  G11B2007/25716 ,  G11B7/00454 ,  G11B7/24009 ,  G11B7/24012

    摘要： An optical disk drive uses an optical disk with spatially separated multiple phase-change WORM recording layers. The optical disk has a light transmissive substrate onto which the laser light is incident. The substrate supports at least two spatially separated multi-film recording stacks, each stack including an active recording layer of phase-change WORM material. The disk is either an air-gap structure wherein each recording stack is supported on a separate substrate and the substrates are separated by an air-gap, or a solid structure wherein a solid light transmissive spacer layer separates the recording stacks. Each of the recording stacks located between the substrate on which the laser light is incident and the farthest recording stack includes an active phase-change recording layer and an optical interference film in contact with the recording layer. The recording layer is made sufficiently thin to have good light transmissivity, but at this low thickness, without any other layers, is not sufficiently reflective to act as a recording layer with suitable servo and recording performance. The optical interference film in contact with the recording layer has a high index of refraction relative to the adjacent recording layer and spacer to increase the optical interference effect in the recording stack. The optical interference film optimizes the contrast, reflectivity and transmissivity of the recording stack. The optical interference film has low absorption so that laser light can pass through it to focus on a farther recording layer. This allows the farther recording layers to be written using reasonable laser power.

    摘要翻译： 光盘驱动器使用具有空间分离的多相变WORM记录层的光盘。 光盘具有入射激光的透光基板。 衬底支撑至少两个空间分离的多层记录堆叠，每个堆叠包括相变WORM材料的活性记录层。 磁盘是气隙结构，其中每个记录堆叠被支撑在单独的基板上，并且基板被气隙分离，或者固体透光隔离层分离记录堆叠的固体结构。 位于其上入射的基板和最远的记录堆叠之间的记录堆叠中的每一个包括与记录层接触的有源相变记录层和光学干涉膜。 记录层被制成足够薄以具有良好的光透射率，但是在没有任何其它层的这个低厚度下，不能充分反射以用作具有适当的伺服和记录性能的记录层。 与记录层接触的光学干涉膜相对于相邻的记录层和间隔物具有高的折射率，以增加记录堆叠中的光学干涉效应。 光学干涉膜优化了记录堆叠的对比度，反射率和透射率。 光学干涉膜具有低吸收，使得激光可以通过它来聚焦在更远的记录层上。 这允许使用合理的激光功率写入更远的记录层。

    Optical disk data storage system with multiple write-once dye-based data layers
    3.
    发明授权
    Optical disk data storage system with multiple write-once dye-based data layers 失效
    光盘数据存储系统，具有多个基于染料的多个数据层

    公开(公告)号：US5627817A

    公开(公告)日：1997-05-06

    申请号：US435069

    申请日：1995-05-08

    申请人： Hal J. Rosen ,  Kurt A. Rubin ,  Wade W.-C. Tang

    发明人： Hal J. Rosen ,  Kurt A. Rubin ,  Wade W.-C. Tang

    IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/244 ,  G11B7/248 ,  G11B7/249

    CPC分类号： G11B7/2472 ,  G11B7/00452 ,  G11B7/005 ,  G11B7/24038 ,  G11B7/244 ,  G11B7/2467 ,  G11B7/248 ,  G11B7/249 ,  G11B2007/0013 ,  G11B7/24015 ,  G11B7/24018 ,  G11B7/2532 ,  G11B7/2533

    摘要： A multiple data layer dye-based optical disk drive uses a disk with a light transmissive substrate onto which the laser light at a single wavelength is incident. The disk substrate supports at least two spatially separated data layers formed of dye material. The disk is either an air-gap structure wherein each data layer is supported on a separate substrate and the substrates are separated by an air-gap, or a solid structure wherein a solid light transmissive spacer layer separates the data layers. The invention makes use of the characteristic anomalous dispersion absorption band of certain dye materials, in which at a specific wavelength the dye material exhibits a high index of refraction and low extinction coefficient. This allows the first data layer (the one nearest the incident laser light) and intermediate data layers to exhibit both sufficient absorption when the laser is focused on those data layers and high transmissivity when the laser is focused on the last or farther data layers. The index of refraction of the dye-based data layers is selected to be significantly greater than the adjacent substrate and spacer layer to enhance the reflectivity, and the thickness of the data layers is selected to take advantage of the constructive interference effect caused by the reflection at those interfaces. In one embodiment of the invention the dye material for the data layers is a mixture of two different dyes that are not chemically reactive with one another and that retain their individual optical properties. This dye-based data layer exhibits anomalous dispersion absorption at two distinct wavelengths, thereby allowing disks recorded at one wavelength to be read by optical disk drives that use lasers operating at a lower wavelength.

    摘要翻译： 多数据层染料基光盘驱动器使用带有透光基板的光盘，单波长的激光入射到该光盘基板上。 盘基片支持由染料材料形成的至少两个空间分离的数据层。 盘是气隙结构，其中每个数据层被支撑在单独的衬底上，并且衬底被气隙分离，或者固体透光间隔层分离数据层的固体结构。 本发明利用某些染料的特征异常色散吸收带，其中在特定波长下染料具有较高的折射率和较低的消光系数。 这允许当激光聚焦在那些数据层上时，第一数据层（最接近入射激光的一个）和中间数据层呈现出足够的吸收，并且当激光聚焦在最后一个或更远的数据层上时具有高的透射率。 选择基于染料的数据层的折射率明显大于相邻衬底和间隔层以增强反射率，并且选择数据层的厚度以利用由反射引起的相长干涉效应 在那些接口。 在本发明的一个实施方案中，用于数据层的染料材料是两种不同的染料的混合物，其不彼此化学反应并且保持其各自的光学性质。 这种基于染料的数据层在两个不同的波长处表现出异常色散吸收，从而允许使用在较低波长下操作的激光的光盘驱动器读取在一个波长处记录的磁盘。