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
Software self-checking systems and methods
Image heating apparatus
Synthesis of 8-amino boron dipyrromethenes having blue fluorescence
Liquid crystal display device
LED lighting module
Partial response decision feedback equalizer with distributed control
  Randomly Featured Patents
Failsafe decision circuit
Method for removing objects from a transportation or storage container
Combined communications system, prohibiting-signal transmitting apparatus, wireless base station, and method
Camera printer operation method with media pull sensing
Lettering apparatus
Compact high power accelerator
Cloth cutting device
Intake port sleeve for an internal combustion engine
Housing for a fluid flow or jet engine
Hydrophilic film and process for producing the same