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RAPID SCAN LADAR 3D IMAGING WITH COMPACT DIGITAL BEAM FORMATION
RAPID SCAN LADAR 3D IMAGING WITH COMPACT DIGITAL BEAM FORMATION
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机译：紧凑型数字波束形成的快速扫描激光3D成像
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摘要
A LADAR system for coherently imaging a target within a volume has a mod¬ ulated laser transmitter at a frequency and a receiver. The receiver has a plurality of lenses, each with its own detector. Each detector is supplied by a centrally located local oscillator tuned to the frequency. The paths from the local oscillator to each detector, as well as the delay within each lens/detector combination are measured during a calibration. A calibrating reflector reflects a test signal during the calibra¬ tion at many frequencies, temperatures and accelerations. Measurements of paths and delays obtained during the calibration are stored, and used to phase compensate subsequent target reflections for coherent processing.
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