Shared pointing for offset target of an adaptive phased array

Details Shared pointing for offset target of an adaptive phased array Shared pointing for offset target of an adaptive phased array

1974-07-05

1980-08-05

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356152, 455615, 455611, G01C 308, H04B 900, G01B 1126

Patent

active

042159369

ABSTRACT:
A coherent optical adaptive system employs phase conjugation for locking the beam of a phased array of laser transmitter to a target, focusing the beam on the target and compensating for distortion and disturbances both within the system and in the propagating medium between the system and the target. A first diffraction-limited lobe of the beam is locked on a real target to track the real target. Simultaneously a second diffraction-limited lobe is directed to a location having a predetermined offset with respect to the target and relative energy of the two lobes is selectively adjusted. A signal component representing a fictitious target that is offset by a predetermined amount from the real target is summed with the signal received from the real target, the phase of the sum is compared with the phase of a reference, and the phase of the transmitted signal is adjusted so as to null the difference between the sum and the reference phases for each of a number of channels.

REFERENCES:
patent: 3346738 (1967-10-01), Rogers et al.
patent: 3644043 (1973-02-01), Jones et al.
patent: 3731103 (1973-05-01), O'Meara
patent: 3760418 (1973-09-01), Cash
patent: 3764213 (1973-10-01), O'Meara

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