Interferometric hydrophone reference leg low frequency compensat

Details Interferometric hydrophone reference leg low frequency compensat Interferometric hydrophone reference leg low frequency compensat

1982-09-27

1986-02-11

Tudor, Harold J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367153, 367176, 350 9615, H04R 2300

Patent

active

045702489

ABSTRACT:
An interferometer inhibits a received low frequency acoustic signal that is elow the pass band of interest from appearing in the output. The interferometer has a conventional optical hydrophone in the signal leg to sense both the high and low frequencies of an acoustic signal. The reference leg has means for accepting a low frequency acoustic signal to modulate the coherent light path length while inhibiting the desired high frequency signal. On recombining the signals from both the signal and reference legs the low frequency signal appearing in both legs is canceled and only the high frequency signal appearing in the signal leg reaches the output. In an alternate embodiment the reference leg mandrel is placed internal to the sensor mandrel and provides a low frequency compensation chamber.

REFERENCES:
patent: 3371311 (1968-02-01), Cholet et al.
patent: 3961291 (1976-06-01), Whitehouse et al.
patent: 3961304 (1976-06-01), Bakewell, Jr.
patent: 4158310 (1979-06-01), Ho
patent: 4160229 (1979-07-01), McGough
patent: 4283114 (1981-08-01), Wandrack
patent: 4310905 (1982-01-01), Palmer
patent: 4360247 (1982-11-01), Beasley
patent: 4375680 (1983-03-01), Cahill et al.
patent: 4418981 (1983-12-01), Stowe
patent: 4422167 (1983-12-01), Shajenko
patent: 4433291 (1984-02-01), Yariv et al.

Affiliated with

Also associated with

Rating

Interferometric hydrophone reference leg low frequency compensat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interferometric hydrophone reference leg low frequency compensat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interferometric hydrophone reference leg low frequency compensat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1209626