Focussed doppler radar

Optics: measuring and testing – Range or remote distance finding – With photodetection

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Details

356 285, G01C 308, G01P 336

Patent

active

041673298

ABSTRACT:
An optically focussed laser radar operating with a radiation wavelength of typically ten microns is focussed on an object to be observed. Doppler data is obtained with a continuous wave signal by mixing a reference of the transmitted signal with a signal reflected from airborne scattering centers. The system is particularly useful for clear air turbulence applications wherein aerosols such as dust and pollen serve as the scattering centers for reflecting the radiation. The radar converts to a pulse Doppler system when the depth of field exceeds the desired range resolution.

REFERENCES:
patent: 3271763 (1966-09-01), Colby, Jr.
patent: 3528741 (1970-09-01), Benson et al.
patent: 3689156 (1972-09-01), Kerpchar
patent: 3738750 (1973-06-01), Kalb et al.
patent: 3856402 (1974-12-01), Low et al.
patent: 3984685 (1976-10-01), Fletcher et al.

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