Laser radar wire detection

Details Laser radar wire detection Laser radar wire detection

1991-10-11

1992-09-29

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 285, G01C 308

Patent

active

051517477

ABSTRACT:
A laser radar detection system (10) is provided for detecting targets located within a detection field and discriminating between unresolved and resolved detected objects (32,34). The detection system (10) employs a laser radar sensor (12) for transmitting a frequency modulated optical transmit signal (22) which scans a desires field and receiving a return signal (24) from objects located therein. The laser radar sensor (12) includes a photo mixer (20) for providing the difference between the return signal (24) and a local oscillator (LO) signal (26) derived from the transmit signal (22). A processor (14) is employed for receiving the difference signal and provides a fourier transform thereof to thereby provide a power spectrum in the frequency domain. The processor (14) analyzes the power spectrum to determine whether the transformed signal contains side lobes (40) and is therefore clutter or does not contain side lobes (40) and therefore indicates the detection of an unresolved object (32).

REFERENCES:
patent: 4167329 (1979-09-01), Jelalian et al.
patent: 4572662 (1986-02-01), Silverman
patent: 4666295 (1987-05-01), Duvall, III et al.
patent: 4721385 (1988-01-01), Jelalian et al.
patent: 4846571 (1989-07-01), Jelalian et al.
patent: 4902126 (1990-02-01), Koechner

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