 |
|
 |
| |
 |
|
Class Information
Number: 250/227.17
Name: Radiant energy > Photocells; circuits and apparatus > Optical or pre-photocell system > Light conductor > Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell) > Causing polarization change in fiber
Description: Subject matter in which the condition sensed changes the polarization of the light passing through the fiber due to some parameter affecting the fiber so that light of a different polarization reaches the photodetector than was incident on the fiber.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5736737 |
Concatenated magneto-optic field sensors |
Apr. 7, 1998 |
| 5737278 |
Extended, flexible, spatially weighted fiber optic interferometric hydrophone |
Apr. 7, 1998 |
| 5731579 |
Electro-optical voltage sensor head |
Mar. 24, 1998 |
| 5729005 |
Fiber optic current sensor with bend birefringence compensation |
Mar. 17, 1998 |
| 5693936 |
Physical quantity detecting apparatus and internal combustion engine control apparatus each utilizing optical fiber |
Dec. 2, 1997 |
| 5675249 |
Portable optical fluid debris detector including cover and calibrating magnet |
Oct. 7, 1997 |
| 5602387 |
Method of protecting an RF receiver in a hostile electromagnetic environment |
Feb. 11, 1997 |
| 5557100 |
Flatness-measuring roller for a continuously manufactured strip by analyzing the birefringence caused by the application of lateral force to an optical fiber wrapped around the roller |
Sep. 17, 1996 |
| 5553173 |
Faraday-effect sensing coil with stable birefringence and method of making same |
Sep. 3, 1996 |
| 5517022 |
Apparatus for measuring an ambient isotropic parameter applied to a highly birefringent sensing fiber using interference pattern detection |
May. 14, 1996 |
| 5500909 |
Sensor head for a fiber-optic current measuring device |
Mar. 19, 1996 |
| 5460048 |
Ultrasonic sensor using a polarization maintaining fibre |
Oct. 24, 1995 |
| 5450006 |
Apparatus and methods for measuring magnetic fields and electric currents |
Sep. 12, 1995 |
| 5440414 |
Adaptive polarization diversity detection scheme for coherent communications and interferometric fiber sensors |
Aug. 8, 1995 |
| 5434501 |
Polarization insensitive current and magnetic field optic sensor |
Jul. 18, 1995 |
| 5416860 |
Method and apparatus for optically measuring electric current and/or magnetic field with temperature compensation |
May. 16, 1995 |
| 5408092 |
Multiple optic sensor system |
Apr. 18, 1995 |
| 5399854 |
Embedded optical sensor capable of strain and temperature measurement using a single diffraction grating |
Mar. 21, 1995 |
| 5399853 |
Optical sensor arrangement using dual mode devices |
Mar. 21, 1995 |
| 5389782 |
Optically powered amplifier used by an electromagnetic field sensor to amplify an electrical signal from an antenna |
Feb. 14, 1995 |
| 5384458 |
Photonic electromagnetic field sensor for use in a missile |
Jan. 24, 1995 |
| 5384635 |
Remote sensing in optical fiber networks by synchronously detecting backscattered optical signals |
Jan. 24, 1995 |
| 5381257 |
Simultaneous data communication and fiber perturbation detection system |
Jan. 10, 1995 |
| 5379357 |
Method and apparatus for polarized optical telecommunications using ultrasonic modulation means |
Jan. 3, 1995 |
| 5377283 |
Configuration control of mode coupling errors |
Dec. 27, 1994 |
| 5361313 |
Two-mode remote fiber optic sensor |
Nov. 1, 1994 |
| 5349458 |
Method for detecting external influence on an optical cable |
Sep. 20, 1994 |
| 5347377 |
Planar waveguide liquid crystal variable retarder |
Sep. 13, 1994 |
| 5336883 |
Optical fiber sensor for producing a variable transverse strain in a localized portion of the fiber |
Aug. 9, 1994 |
| 5334831 |
Proximity detector for detecting position of a target |
Aug. 2, 1994 |
| 5331392 |
Method of identifying an optical cable |
Jul. 19, 1994 |
| 5317147 |
Method and apparatus for absolute measurement of force by use of polarized, non-coherent light and compensation of strain-induced birefringence effects in a single mode-fiber optic waveguide |
May. 31, 1994 |
| 5317524 |
Spectral signal analyzer system |
May. 31, 1994 |
| 5311346 |
Fiber-optic transmission polarization-dependent distortion compensation |
May. 10, 1994 |
| 5309533 |
Structure with intrinsic damage control, manufacturing processes and method of use |
May. 3, 1994 |
| 5308973 |
Method and device for the measurement of force by a fiber optics system by evaluating phase shift of light waves |
May. 3, 1994 |
| 5297436 |
Optical fibre ultrasonic sensor |
Mar. 29, 1994 |
| 5260565 |
Separation of simultaneous events in a laser firing unit using a polarization technique |
Nov. 9, 1993 |
| 5258615 |
Optical fiber monitoring by detection of polarization variations |
Nov. 2, 1993 |
| 5256872 |
Device for measuring current by optic fiber and dual polarization analysis |
Oct. 26, 1993 |
| 5245400 |
Fiber optic polarization maintaining fused coupler fabricating apparatus |
Sep. 14, 1993 |
| 5243186 |
Photonic electromagnetic field sensor apparatus |
Sep. 7, 1993 |
| 5223705 |
Measurement of an optical amplifier parameter with polarization |
Jun. 29, 1993 |
| 5214377 |
Magnetic debris monitor using magneto-optic sending |
May. 25, 1993 |
| 5204619 |
Device for measuring rotational speed using an optical fiber sensor |
Apr. 20, 1993 |
| 5202746 |
Method and apparatus for identifying an optical transmission medium |
Apr. 13, 1993 |
| 5196695 |
Fiber-optic sensor having near-field and remote-field signals |
Mar. 23, 1993 |
| 5187983 |
Fiber-optic strain gauge manometer |
Feb. 23, 1993 |
| 5164587 |
Polarimetric parameter measurement systems and methods for measuring a plurality of parameters |
Nov. 17, 1992 |
| 5149962 |
Proximity detector using faraday effect and bidirectional transmission |
Sep. 22, 1992 |
|
|
|
 |
|
 |
|
| |
Randomly Featured Patents |
|
