Resources Contact Us Home
Optical fiber sensor utilizing a swellable detector material

Image Number 2 for United States Patent #5757988.

An optical fiber sensor for inducing a microbend in an optical fiber in the presence of a detectable fluid such as water includes a chamber with an expansible block located therein. When water enters the chamber, the block expands in a particular direction to move a pusher bar which, in turn, moves a puller wire to bend the fiber at a location remote from the chamber. A gap may initially be provided between the expansible block and the pusher bar so that the presence of water vapor within the chamber will not move the pusher bar but the presence of liquid water will.

  Recently Added Patents
Ball point pen
Hair treatment product and hair after-treatment product containing ether guanidines as active substances, for protecting from damage caused by chemical treatment and for repairing already dama
Digital camera with high dynamic range mode of operation
Pulse control for nonvolatile memory
Printing system with adjustable aerosol collection
Apparatus and method for turbine flow meter sensor adjustment
Automatic back cleaner and track system
  Randomly Featured Patents
Access control card, particularly for access to an automotive vehicle
Stator for eccentric spiral pump
Method and apparatus for formatting storage medium
Composite tuning fork and method of making same
Process for obtaining coating compositions of improved whiteness
Testing apparatus with improved follower mechanism
Method of producing high-molecular weight polyphenylene oxides
Configuration modes for a time multiplexed programmable logic device
Combined bottle and cap
Handheld grinding device for crown preparation