Heterodyne array for measurement of target velocity

Details Heterodyne array for measurement of target velocity Heterodyne array for measurement of target velocity

1992-06-30

1993-08-03

Hellner, Mark

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

G01P 336

Patent

active

052334031

ABSTRACT:
A system for determining the angular velocity of a mobile target relative to a station. The system develops first and second reference beams and a beam to the target to enable the target to generate first and second signals. Optical devices, preferably fiberoptical devices, responsive to the first and second reference beams and to the first and second signals respectively received from the target at discrete first and second positions on the station, respectively produce first and second interference pattern signals. Each of said received signals has a Doppler shift as a function of the movement of the target. An electrical processing circuit then processes the interference pattern signals to develop a signal indicative of the target's angular velocity.

REFERENCES:
patent: 3419330 (1968-12-01), Schneider et al.
patent: 4506979 (1985-03-01), Rogers
patent: 4925297 (1990-05-01), Brown
patent: 5148229 (1992-09-01), Wisall
T. J. Kane et al., "Coherent Laser Radar At 1.06um Using Nd:YAG Lasers," ics Letters, 12(4), pp. 239-241, (1987).
M. J. Kavaya et al., "Remote Wind Profiling With A Solid-State Nd:YAG Coherent Lidar System," Optics Letters, 14(15), pp. 776-778, (1989).
A. L. Huston et al., "Frequency-Offset, Solid-State Laser Coherent Doppler Velocity Measurements of High-Speed Targets," Optics Letters 15(10), pp. 570-572, (1990).

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