초록 ▼

The present invention provides a laser radar (ladar) imaging system in which both the range of an object being imaged and the velocity of the object can be measured simultaneously and accurately with superior range resolution and with minimal ambiguity. Use is made of a ladar system based on matched

The present invention provides a laser radar (ladar) imaging system in which both the range of an object being imaged and the velocity of the object can be measured simultaneously and accurately with superior range resolution and with minimal ambiguity. Use is made of a ladar system based on matched-filter cross-correlation of light pulse waveforms that have multiple, simultaneous frequency components with phase variation and incommensurate spectral frequency spacing between frequency components.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] Ladar apparatus, comprising:a generator of light pulses that have finite duration and temporal waveforms comprising multiple, simultaneous frequency components with varying phase r

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] Ladar apparatus, comprising:a generator of light pulses that have finite duration and temporal waveforms comprising multiple, simultaneous frequency components with varying phase relationships between the frequency components and incommensurate spectral frequency spacing;a transmitter positioned in the light pulses in a manner that promulgates the light pulses toward a target;a transmitted waveform detector positioned to receive and record a temporal waveform in the duration of a pulse that is promulgated by the transmitter;a received waveform detector positioned to receive and record a temporal waveform of a pulse that is reflected by the target;a matched-filter correlator that modifies a recorded waveform with a sequence of phase shifts that correspond to a sequence of hypothesized target velocities for matched-filters and that performs matched-filter cross-correlations between the modified waveforms and the reflected waveform until a match is found; anda timer that measures time elapsed between transmission of a pulse and reception of the reflected pulse that matches one of the matched-filters in the cross-correlations.