Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1992-05-05
1992-11-03
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367 7, 367128, 356 3, G01S 1500
Patent
active
051611252
ABSTRACT:
Optical radiation is propagated through an attenuating medium to a target om which it is reflected and picked up by an echo receiver system to provide ranging and imaging data during one mode of operation. The optical radiation is transformed into acoustical pulse energy alternatively radiated to and reflected from the target in another mode of operation. The operational mode is selected so as to optimize the data extracted from the echo receiver system under different conditions affecting receiver reception.
REFERENCES:
patent: 3978342 (1976-08-01), Hagen et al.
patent: 4690551 (1987-09-01), Edwards et al.
patent: 4713798 (1987-12-01), Kay
patent: 4761072 (1988-08-01), Pryor
Pihulic Daniel T.
Shuster Jacob
The United States of America as represented by the Secretary of
Walden Kenneth E.
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