Optical: systems and elements – Holographic system or element – Having multiple object beam or diffuse object illumination
Patent
1997-07-08
2000-02-29
Spyrou, Cassandra
Optical: systems and elements
Holographic system or element
Having multiple object beam or diffuse object illumination
359 7, 359 11, 359 22, G03H 102, G03H 112, G03H 126
Patent
active
060316438
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.
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International Business Machines - Corporation
Martin Robert B.
Martin Thomas R.
Spyrou Cassandra
Treas Jared
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