Optical processor for pulse train identification
August 26, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3509565 3903407 Radar signal processor utilizing a multi-channel optical correlator Correlation methods and apparatus utilizing mellin transforms Positional, rotational and scale invariant optical correlation method and apparatus Doppler processing method and apparatus Method and apparatus for coherent detection in optical processors Method of multivariant intraclass pattern recognition System for autocorrelating optical radiation signals Acousto-optical spectrum analyzer with expanded frequency resolution InventorsApplicationNo. 749752 filed on 08/26/1991US Classes:359/29, Fourier transform holography359/559, Using Fourier transform spatial filtering359/563, With diffraction grating708/816OpticalExaminersPrimary: Arnold, Bruce Y.Assistant: Parsons, David R. Attorney, Agent or FirmInternational ClassesG03H 001/16G02B 027/46 G06E 003/00 AbstractA pulse train in the presence of random noise and other pulse trains is identified by controlling pixels in a raster display in accordance with incoming signals; using the raster display to modulate a laser beam with the pulses; Fourier-transforming the modulated beam, then performing a Cartesian to polar coordinate transformation on the Fourier-transformed beam; inverse Fourier transforming the coordinate-transformed beam, and passing the result through a line spatial filter and focusing the filtered beam on a one-dimensional detector array.Other References
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