公开(公告)号：US06226109B1

公开(公告)日：2001-05-01

申请号：US09370862

申请日：1999-08-09

申请人： Wayne R. Tompkin ,  René Staub

发明人： Wayne R. Tompkin ,  René Staub

IPC分类号： G03H100

CPC分类号： G11B20/00086 ,  G11B7/00736 ,  G11B20/00586 ,  G11B20/00608 ,  G11B20/00876 ,  G11B23/281 ,  G11B23/34

摘要： This invention relates to marking the genuine CD in an easily detectable way while difficult to counterfeit. The improved CD has within its layers a second structured surface parallel to the flat surfaces of the CD. The second structured surface acts as a diffractive security device, that is to be read out from the same side of the CD, the verso side, as the data structure. In one example, the second structured surface is defined by a step of the refractive index or by a transparent reflective layer. Despite the diffractive rainbow colors observed on the verso side of the CD, the structure of the security device can be read out visually and/or with a CD-reader, even by a simple hand-held reader, and verified without the need of a bulky apparatus. A CD-reader prevents the playing of embodiments of the improved CDs.

摘要翻译： 本发明涉及以易于检测的方式标记原始CD，同时难以伪造。 改进的CD在其层内具有平行于CD的平坦表面的第二结构化表面。 第二结构化表面用作衍射安全设备，其将作为数据结构从CD的同一侧读出。 在一个示例中，第二结构化表面由折射率的步骤或通过透明反射层限定。 尽管在CD的正面观察到衍射彩虹的颜色，但是即使通过简单的手持读取器也可以在视觉上和/或使用CD读取器读出安全装置的结构，并且无需使用 体积大的装置。 CD读取器防止改进的CD的实施例的播放。

公开(公告)号：US5875170A

公开(公告)日：1999-02-23

申请号：US30966

申请日：1998-02-26

申请人： Wayne R. Tompkin ,  Rene Staub

发明人： Wayne R. Tompkin ,  Rene Staub

IPC分类号： G03H1/26 ,  G06K19/06 ,  G06K19/16 ,  G11B7/0033 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/013 ,  G11B7/13 ,  G11B7/24 ,  G11B7/24044 ,  G11B7/24085 ,  G11B23/28

CPC分类号： G11B23/284 ,  G03H1/26 ,  G06K19/06046 ,  G06K19/16 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/131 ,  G11B7/24 ,  G11B7/24044 ,  G11B7/24085 ,  G03H1/0244 ,  G03H2001/183 ,  G11B7/0033

摘要： An optical data carrier is written along data tracks with diffraction patterns, each diffraction pattern representing a predetermined bit sequence with n bits. The bit sequences of a diffraction pattern can be determined with a number n of photodetectors which is smaller than the number m of the possible different diffraction patterns. It is particularly provided that the number m is a power of two of the number n: m=2.sup.n. The design of the diffraction pattern as a number of at most n juxtaposed diffraction elements which in the reading operation illuminate only a single photodetector permits simple production of an ROM and a WORM data carrier. If relief structures with an asymmetrical profile are also used as diffraction elements and if the reading device subjects the signals supplied by the photodetectors to an analysis operation and only then determines the bit sequence to be associated with a diffraction pattern, the number m of different diffraction patterns which can be read with a predetermined number n of photodetectors can be further increased. If the data carrier serves as a WORM memory with a high level of security in relation to forgeries and unauthorized manipulation, then the unaltered diffraction pattern 2 in the form of a security feature represents on the one hand the bit sequence and on the other hand a memory cell for a single bit.

摘要翻译： 光学数据载体沿着具有衍射图案的数据轨道写入，每个衍射图案表示具有n位的预定位序列。 衍射图案的位序列可以用数目为n的光电探测器确定，该光电探测器小于可能的不同衍射图案的数量m。 特别地，数量m是数字n：m = 2n的2的幂。 在读取操作中只有单个光电检测器的衍射图案的设计为多达n个并置衍射元件，允许简单地生产ROM和WORM数据载体。 如果具有不对称轮廓的浮雕结构也用作衍射元件，并且如果读取装置将由光电检测器提供的信号进行分析操作，并且仅确定与衍射图案相关联的位序列，则不同衍射的数量m 可以进一步增加可以用预定数量的n个光电检测器读取的图案。 如果数据载体用作与伪造和未经授权的操纵相关的高级安全性的WORM存储器，则以安全特征的形式的未改变的衍射图案2一方面表示比特序列，另一方面表示 单位存储单元。

公开(公告)号：US5754520A

公开(公告)日：1998-05-19

申请号：US571603

申请日：1995-12-13

申请人： Wayne R. Tompkin ,  Rene Staub

发明人： Wayne R. Tompkin ,  Rene Staub

IPC分类号： G03H1/26 ,  G06K19/06 ,  G06K19/16 ,  G11B7/0033 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/013 ,  G11B7/13 ,  G11B7/24 ,  G11B7/24044 ,  G11B7/24085 ,  G11B23/28

CPC分类号： G11B23/284 ,  G03H1/26 ,  G06K19/06046 ,  G06K19/16 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/131 ,  G11B7/24 ,  G11B7/24044 ,  G11B7/24085 ,  G03H1/0244 ,  G03H2001/183 ,  G11B7/0033

摘要： An optical data carrier for use as a WORM memory contains memory cells where each memory cell is physically represented by a diffraction pattern. The content of each memory cell is a one bit information having a binary value "0" or "1". If a memory cell is altered by applying thermal energy it represents the complementary binary value. The unaltered memory cells are also used as security elements. This means that upon reading the content of an unaltered memory cell with a readout beam, the unaltered memory cell bends this reading beam into a plurality of different beams of predetermined outgoing directions. The intensities of these reflected beams are measured and compared with stored values. The data carrier is only then an authentic data carrier and not a fraudulent imitation, if the measured intensities of the reflected beams of such an unaltered memory cell lie within predetermined ranges.

摘要翻译： 用作WORM存储器的光学数据载体包含存储单元，其中每个存储单元由衍射图案物理地表示。 每个存储单元的内容是具有二进制值“0”或“1”的一位信息。 如果通过施加热能来改变存储单元，则表示互补的二进制值。 未改变的存储单元也被用作安全元件。 这意味着，在读取具有读出光束的未改变的存储单元的内容的情况下，未改变的存储单元将该读取光束弯曲成多个不同的预定输出方向的光束。 测量这些反射光束的强度并将其与存储值进行比较。 如果这种未改变的存储单元的反射光束的测量强度处于预定范围内，则数据载体仅仅是真实的数据载体，而不是欺骗性模仿。