Electrical computers: arithmetic processing and calculating – Electrical analog calculating computer – Particular function performed
Reexamination Certificate
2005-10-18
2011-12-13
Mai, Tan V (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical analog calculating computer
Particular function performed
Reexamination Certificate
active
08078663
ABSTRACT:
This invention relates to a pattern recognition correlator and method for correlating input data with one or more reference data sets. The input data, which may be for instance digital amplitude modulated optical data, is used to modulate an optical signal to form a phase modulated optical signal. This temporal phase modulated optical signal is then converted into a parallel optical phase signal, preferably through use of an optical delay, and modulated by an optical phase modulator. When there is a correlation between the input data and the reference data the emerging wavefront is plane and can be strongly coupled to a detector. In the absence of correlation the emergent wavefront is not plane and so is not coupled as strongly to the detector. The detector output can therefore be used as an indication of correlation.
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Translation of Japanese Notice of Rejection mailed Sep. 21, 2010 in JP 2007-536268.
Lewin Andrew C
Lewis Meirion F
Wilson Rebecca A
Mai Tan V
Nixon & Vanderhye P.C.
QinetiQ Limited
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