Depth-of-field arc-transducer and sonar system

Details Depth-of-field arc-transducer and sonar system Depth-of-field arc-transducer and sonar system

1974-03-06

1976-06-29

Tudor, Harold

Communications: electrical

Selective

Having indication or alarm

310 96, 340 3R, 340 6S, 340 9, H04B 1300

Patent

active

039672344

ABSTRACT:
A large depth-of-field arc-transducer for use in sonar systems is provided in which at least one transducer element is positioned to lie along the arc of a circle of radius R. The active faces of the transducer elements are directed to a point that lies on a line normal to the plane of the arc and passes through the center thereof. The radius R is equal to between 0.3 to 0.6 Rs and, preferably about 0.5 Rs, where Rs is the distance from said point to the midpoint of the arc-transducer.
An improved depth-of-field sonar system is provided where at least two arc-transducers are used having different radii, and preferably, where each radius R is equal to between 0.3 to 0.6 Rs.

REFERENCES:
patent: 3142032 (1964-07-01), Jones
patent: 3144631 (1964-08-01), Lustig et al.
patent: 3359537 (1967-12-01), Geil et al.
patent: 3368190 (1968-02-01), Wilson et al.
patent: 3381264 (1968-04-01), Lavergne et al.
patent: 3585578 (1971-06-01), Fischer
patent: 3585579 (1971-06-01), Dorr
patent: 3716824 (1973-02-01), Dor et al.
patent: 3760345 (1973-09-01), Hughes

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