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
Multilayer films having reduced curling
Sound producing apparatus for vehicle
Magnesium metal-air battery
Power supply architecture system designer
Etching composition
Braided pull tug pet toy
Waterproof wound protector
  Randomly Featured Patents
Optimization methods for the insertion, protection, and detection of digital watermarks in digital data
Multi-band ring focus dual reflector antenna system
Method of manufacturing a molding member and molding member which can be manufactured by means of the method
Cable continuity test apparatus
Radio frequency identification tag exciter/reader
Wet wipes containing a mono alkyl phosphate
Connection board for use in vehicles
Electrically assisted transdermal method and apparatus for the treatment of erectile dysfunction
Method for controlling the farm of a magnetic domain of a magneto-optical disk using pre-write testing
Pad array semiconductor device having a heat sink with die receiving cavity