LASER SOUND DETECTOR
Assignee
SANDERS ASSOCIATES, INC., A CORP OF DE
Filed
Nov 9, 1983
Granted
Dec 29, 1992
Location
HOLLIS NH US
Abstract
In order to sense the presence of sound in a remote underwater location, a neutrally buoyant reflector (20) is deployed underwater, and a laser (12) disposed at a remote location aims coherent light at the reflector (20). A detector (24) senses the coherent light reflected from the reflector (20) and compares it in phase with coherent light split from the outgoing beam. The system then provides an indication of the presence of sound by, for instance, amplifying the result of the phase detection to a speaker (26).
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jun 13, 1984
Rescinded
Aug 24, 1992
Duration
8 years, 2 months
Inventor
- 1SAMUEL S. BALLARD
Record Details
- Patent number
- US 5175713
- Application
- 06550282
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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