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Multi-channel filter system

  • US 5,005,946 A
  • Filed: 04/06/1989
  • Issued: 04/09/1991
  • Est. Priority Date: 04/06/1989
  • Status: Expired due to Fees
First Claim
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1. A multi-channel filter system comprising:

  • means for modulating a substantially coherent light beam with an input RF signal spectrum;

    means for optically Fourier transforming and channelizing the modulated light beam to produce an input array of modulated light beams, each light beam in said input array being modulated by a spectral component of said input RF signal spectrum;

    means for optically notching out noise in said input array of modulated light beams;

    a holographic multi-channel spectrum filter, said spectrum filter selectively passing light beams from said input array having a correlation to preselected RF spectral components to produce a correlated output array;

    means for illuminating said spectrum filter with said input array of modulated light beams to produce said correlated output array;

    means for downconverting said correlated output array into an output array of noise excised and spectrum filtered RF signals; and

    means for detecting and for respectively converting the signals passed by said holographic multi-channel spectrum filter into electrical output signal arrays.

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