Adaptive high frequency laser sonar system

Details Adaptive high frequency laser sonar system Adaptive high frequency laser sonar system

2007-06-12

2009-11-03

Lobo, Ian J (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

Reexamination Certificate

active

07613075

ABSTRACT:
An acoustic sensing device includes a housing having an internal cavity filled with a vibration decoupling medium. An acoustic window formed of an acoustically transparent material is mounted in the housing. This mounting can be by antivibration mounts to prevent housing noise from affecting the acoustic window. A scanning laser vibrometer is positioned within the housing and directed to detect vibrations of the acoustic window. Antivibration mounts are joined between said scanning laser vibrometer and said housing. In further embodiments, the scanning laser vibrometer detects vibrations at a plurality of locations on the acoustic window forming a virtual array.

REFERENCES:
patent: 4155065 (1979-05-01), Stimler
patent: 4446543 (1984-05-01), McLandrich et al.
patent: 6188644 (2001-02-01), Walsh et al.
patent: 6349791 (2002-02-01), Glenning et al.
patent: 2002/0149998 (2002-10-01), Hoover
Benjamin A. Cray, Stephen E. Forsythe, Andrew J. Hull and Lee E. Estes, A Scanning Laser Doppler Vibrometer Acoustic Array, paper, Jul. 2006, pp. 164-170, vol. 120, No. 1, Journal Acoustic Society of America, USA.

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