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Optical flow monitor

  • US 6,683,679 B2
  • Filed: 05/23/2002
  • Issued: 01/27/2004
  • Est. Priority Date: 05/23/2002
  • Status: Expired due to Fees
First Claim
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1. A device for measuring flow of a fluid comprising:

  • A) a laser and laser optics configured to direct laser beams produced by said laser through a flowing fluid to produce a flow perturbed laser beam, B) an interference producing means for producing interference patterns in said flow perturbed laser beam, C) two optical detectors defining a first detector configured to monitor at least one interference fringe defining a first interference fringe and a second detector configured to monitor at least one interference fringe other than said first interference fringe, D) a correlation means for correlating data from said first and second detectors to determine flow rate of said fluid.

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