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公开(公告)号：US5432047A
公开(公告)日：1995-07-11
申请号：US897626
申请日：1992-06-12
申请人： John C. Cheng , William D. Hinsberg, III , Robert T. Lynch, Jr. , Scott A. MacDonald , Lester A. Pederson , James S. Wong
发明人： John C. Cheng , William D. Hinsberg, III , Robert T. Lynch, Jr. , Scott A. MacDonald , Lester A. Pederson , James S. Wong
CPC分类号： G11B7/261 , Y10S430/146
摘要： An optical data storage device having a substrate has guide ridges, or reverse grooves, in a concentric or spiral shape formed thereon, and disposed in a plane parallel to and disposed from the substrate surface. The device further has pits formed approximately midway between the guide ridges and disposed in the substrate and having bottoms below the plane of the substrate surface. A method for manufacturing the optical data storage device having both address pits and guide ridges is disclosed. A dual tone photosensitive material is applied to a substrate, exposed with a laser light source comprising two distinct wavelengths, and developed to provide a desired bipolar geometry thereon.
摘要翻译： 具有基板的光学数据存储装置具有形成在其上的同心或螺旋形状的导向脊或反向槽，并且设置在与基板表面平行并布置的平面中。 该装置还具有形成在导向脊之间的中间的凹坑并且设置在基板中并且具有在基板表面的平面下方的底部。 公开了一种具有地址坑和引导脊的光数据存储装置的制造方法。 将双色感光材料施加到基板上，用包括两个不同波长的激光光源曝光，并显影以在其上提供期望的双极几何形状。
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2.发明授权
公开(公告)号：US5173694A
公开(公告)日：1992-12-22
申请号：US855139
申请日：1992-03-19
CPC分类号： H03M5/145 , G11B20/1426
摘要： A rate 2/5 (2,18,2) code especially suitable for use with a resonant coil overwrite technique for magneto-optical recording. Serial binary input data is converted to serial binary code data that satisfies a (2,18,2) constraint and is reconverted to the serial binary input data. An encoder receives two sequential input bits and a five-bit state vector derived from an immediately preceding encoding operation, and generates a five-bit codeword and a new five-bit state vector based on the two input bits and five-bit state vector. A decoder converts the binary code data into five-bit codewords, converts each five-bit codeword sequentially into a reassigned three-bit codeword representation, then collects sets of four adjacent three-bit codeword representations. Each reassigned codeword representation is converted to a two-bit output corresponding to a then current set of said four three-bit codeword representations, and successive two-bit outputs are reconverted into the serial binary data.
摘要翻译： 速率2/5（2,18,2）代码，特别适合用于磁光记录的谐振线圈覆盖技术。 串行二进制输入数据被转换为满足（2,18,2）约束的串行二进制代码数据，并被重新转换为串行二进制输入数据。 编码器接收两个顺序输入位和从紧接在前的编码操作导出的五位状态向量，并且基于两个输入位和五位状态向量生成五位代码字和新的五位状态向量。 解码器将二进制码数据转换为五位码字，将每个五位码字顺序地转换成重新分配的三位码字表示，然后收集四个相邻三位码字表示的集合。 每个重新分配的码字表示被转换成对应于所述四个三比特码字表示的当前组的两比特输出，并且连续的两比特输出被转换成串行二进制数据。
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