Patents Represented by Attorney Thomas R. Martin

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  • Method for holographic storage
    Patent number: 6031643
    Abstract: The present invention is a method for optical data storage which enhances the contrast between ON and OFF pixels. The method comprises writing a two-dimensional image comprising a plurality of pixels into a recording medium with the exposure of individual ON pixels during the recording of the image. The ON pixels are then switched off and OFF pixels are switched on, and the phase of either the object beam or reference beam is changed. The process results in subtraction of residual signal from the OFF pixels.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: February 29, 2000
    Assignee: International Business Machines Corporation
    Inventor: Geoffrey William Burr