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Photonics Dictionary

Doppler-spread imaging

An imaging process, similar to specific Doppler mapping radar techniques, that utilizes a laser, an optical imaging system, and a line array of photodetectors and spectrum analyzers. The laser illuminates the object and the imaging system projects the image onto the photodetector array where a local oscillator signal, passed directly from the laser, also is introduced. The outputs of the detectors are then passed to the spectrum analyzers.
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