Dual beam doppler shift hydrophone

Details Dual beam doppler shift hydrophone Dual beam doppler shift hydrophone

1979-12-10

1991-03-05

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Signal transducers

367149, 350 961, 25022719, H04R 2300

Patent

active

049982257

ABSTRACT:
A dual beam hydrophone wherein a reference laser beam and a signal laser m are both modulated simultaneosuly by the movement of reflecting surfaces responding to pressure variatrions due to an impinging acoustic wave. Each beam, travels the same path length within the hydrophone before being detected, thus eliminating any otherwise needed signal compensation. The reference beam and signal beam are acoustically modulated 180 degrees out of phase which reduces by one half the number of reflections normally required to produce the same sensitivity.

REFERENCES:
patent: 4071753 (1978-01-01), Fulenwider et al.
patent: 4115753 (1978-09-01), Shajenko
patent: 4162397 (1979-07-01), Bucaro et al.

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