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    Optical information storage and retrieval system with optical storage medium
    2.
    发明授权
    Optical information storage and retrieval system with optical storage medium 失效
    光学信息存储和光存储介质检索系统

    公开(公告)号：US3912391A

    公开(公告)日：1975-10-14

    申请号：US33275563

    申请日：1963-12-23

    Applicant: IBM

    Inventor： FLEISHER HAROLD ,  HARRIS THOMAS J ,  SHAPIRO EUGENE

    IPC: G11C13/04 ,  G03B27/44 ,  G11B5/00

    CPC classification number: G11C13/042

    Abstract: Storage of information is performed by interference effects in depth in an optically accessible information storage unit. The storage unit is divisible into a plurality of individual information storage areas permitting the recording of the information in the form of various light and no light conditions. Plural light scattering layers are formed in depth in the unit corresponding to the information stored in that area. Read out is performed by applying light to the unit. The scattering layers act on the applied light in accordance with the information stored to provide indications for detection of the stored information.

    Partitioning logic operations in a generalized matrix system
    7.
    发明授权
    Partitioning logic operations in a generalized matrix system 失效
    在一般化矩阵系统中分割逻辑运算

    公开(公告)号：US3593317A

    公开(公告)日：1971-07-13

    申请号：US3593317D

    申请日：1969-12-30

    Applicant: IBM

    Inventor： FLEISHER HAROLD ,  WEINBERGER ARNOLD ,  WINKLER VAUGHN D

    IPC: H03K19/177 ,  G06C15/00

    CPC classification number: H03K19/177

    Abstract: An improved method and means to implement a logic function F of N variables by partitioning the logic operation in a plurality of generalized logic matrices. It is first mathematically demonstrated that a function F of N variables may be expanded into subfunctions of a lesser number of variables. These subfunctions may be logically implemented individually and then logically combined so as to produce the desired function of N variables with a concomitant savings in logic circuitry over that required if the functions were directly implemented. The means used to implement the logic function F are a plurality of generalized logic matrices, each of which comprises a plurality of logic gates arranged in columns and rows, an input decoder for accepting the input variables, and a storage register for varying the functions generated at the output of the matrix. These matrices are arranged in cascade so that, as the function F is constructed from the several subfunctions, additional variables are inserted at each matrix stage until the function F of N variables is fully generated.

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