FIBER OPTIC SENSOR
Assignee
ALLIED CORPORATION, A CORP. OF NY
Filed
Oct 30, 1987
Granted
Oct 25, 1994
Location
VALENCIA CA US
Abstract
A fiber optic sensor includes a generally cylindrical housing including a fiber optic transmitter in one end connected to a source of light, a sensor within the housing attached to the cylindrical wall of the housing exposed to the transmitted light and responsive to a sensed condition such as acoustic pressure waves to modulate the light, and a fiber optic receiver for receiving the modulated light and supplying it to an external circuit. The sensor may be a thin film fastened to the wall or it may include a diffraction pattern on a reflective inside surface of the wall which will produce a modulated light output with movement of the wall. The thin film may be fastened to the wall directly or suspended by means of Euler struts. The thin film may include a reflective spot and/or a moire pattern for modulating the light. Another embodiment includes a resiliently mounted mass fastened to a thin film which may have quadrature or other patterns which would alter the light modulation pattern depending upon the direction of a sensed acceleration.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jul 19, 1988
Rescinded
Apr 21, 1994
Duration
5 years, 9 months
Inventor
- 1ROBERT M. ROBERTSON
Record Details
- Patent number
- US 5359445
- Application
- 07114963
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records