Patent ID: 6686997
Filing Date: 2004-02-03
Classification: G01J

Abstract:
A matched detection matrix pulse detector, comprising:a collimated beam of light; a Bragg cell illuminated by the collimated beam of light, the Bragg cell driven by an input signal containing pulses of various modulations, the cell spatially modulating the collimated beam of light; an opaque plate comprising a plurality of apertures each of a selected length; a binary optical plate or hologram positioned in the modulated collimated beam of light to replicate the image of the Bragg cell aperture a plurality of times in the plane of the optical plate; an optical lens assembly in the path of the spatially modulated beam of light from the opaque plate, the optical lens assembly generating a spatial Fourier transform of the light distribution thereby resulting in the intensity of light in the focal plane of the optical lens assembly proportional to the power spectral density of the light distribution in the apertures of the opaque plate; and a detector/processor in the focal plane of the optical lens assembly responsive to the light intensity received by the detector/processor and generating output signals.