Research/Patents/US 4998225
US 4998225

DUAL BEAM DOPPLER SHIFT HYDROPHONE

Assignee

Filed

Dec 10, 1979

Granted

Mar 5, 1991

Location

STORRS CT US

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.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Apr 9, 1982

Rescinded

May 4, 1990

Duration

8 years

Inventor

  • 1PETER SHAJENKO

Technology Domains

Click a domain to browse all patents in this category.

Back to patent indexSource: USPTO 35 USC §181 secrecy order records