Parametric array doppler sonar apparatus

Details Parametric array doppler sonar apparatus Parametric array doppler sonar apparatus

G - Physics

01

S

349/25

G01S 7/52 (2006.01) G01S 15/02 (2006.01) G01S 15/60 (2006.01) G10K 11/30 (2006.01)

Patent

CA 1150815

ABSTRACT OF THE DISCLOSURE Parametric array doppler sonar apparatus includes an acoustic lens containing a flat disk-like central portion and an annular outer portion serving as a convergent lens. Multiple transducers are positioned between the lens and the focal plane so as to launch collimated acoustic beams in specified directions through the central portion of the lens and to receive reflected energy propagating principally through the annular portion of the lens.

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