OPTICAL DATA STORAGE MEDIUM
    5.
    发明专利

    公开(公告)号:JP2001134985A

    公开(公告)日:2001-05-18

    申请号:JP2000317832

    申请日:2000-10-18

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide an optical data storage system with which even data from any data layer of an optical medium consisting of plural data is clearly read. SOLUTION: The optical data storage system suitable to a large capacity of storage is composed of the optical medium having a multiple data surface and a driving device including an optical head. A desired data surface is irradiated with laser beams and reflected light is used as a signal by the driving device. When data in a deep data layer is read, since light has to pass through many layers, a weak signal only is obtained. Consequently, signal intensity is difference depending on the data surface. Respective data surface is optimized so that the signal intensity from each data surface becomes nearly equal by using the medium having a coated dielectric reflecting layer and by suitably selecting the coating material and its thickness. In the preferable embodiment, semiconductor material is stuck onto each data surface and the reflecting quantity is decided by the thickness.

    Multiple Data Surface Optical Medium and Storage System with Fixed Aberration Correction

    公开(公告)号:CA2123450A1

    公开(公告)日:1995-01-23

    申请号:CA2123450

    申请日:1994-05-12

    Applicant: IBM

    Abstract: The optical data storage system comprises an optical medium comprising two spaced-apart substrates having the same material thickness, each substrate having a data layer. At least one of the substrates has a data layer which is at least partially transmissive. A light source is located near a first one of the substrates. A device directs light from the source to the medium, and includes a device for focusing the light to a discrete number of focusing positions. Each position defines an optical path between the light source and a corresponding one of the data layers. Each of the two optical paths includes a passage through substrate material having a total thickness equal to three substrate thicknesses.

    Recording and reproducing device
    8.
    发明专利
    Recording and reproducing device 有权
    记录和复制设备

    公开(公告)号:JP2006004627A

    公开(公告)日:2006-01-05

    申请号:JP2005236852

    申请日:2005-08-17

    Abstract: PROBLEM TO BE SOLVED: To provide an optical data storage system with which data from any data layer of an optical medium consisting of a plurality of data layers is clearly read. SOLUTION: The optical data storage system suitable to a large capacity storage is composed of the optical medium having a multiple data surface and a driving device including an optical head. A desired data surface is irradiated with laser beams and reflected light is used as a signal by the driving device. When data in a deep data layer is read, since light has to pass through many layers, only a weak signal is obtained. Consequently, signal intensity is difference depending on the data surface. Respective data surface is optimized so that the signal intensity from each data surface becomes nearly equal by using the medium having a coated dielectric reflecting layer and by suitably selecting the coating material and its thickness. In the preferable embodiment, semiconductor material is stuck onto each data surface and the reflecting quantity is decided by the thickness. COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题:提供一种光学数据存储系统,其中清楚地读取由多个数据层组成的光学介质的任何数据层的数据。 解决方案:适用于大容量存储器的光学数据存储系统由具有多个数据表面的光学介质和包括光学头的驱动装置组成。 用激光束照射期望的数据表面,并且通过驱动装置将反射光用作信号。 当读取深度数据层中的数据时,由于光必须通过许多层,所以仅获得弱信号。 因此,信号强度根据数据表面而不同。 优化各个数据表面,使得通过使用具有涂覆的电介质反射层的介质和通过适当选择涂层材料及其厚度,来自每个数据表面的信号强度几乎相等。 在优选实施例中,将半导体材料粘贴到每个数据表面上,并且反射量由厚度决定。 版权所有(C)2006,JPO&NCIPI

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