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Measuring instrument using two transmitters and two receivers for measuring light travelling in an optical medium

  • US 5,189,298 A
  • Filed: 10/28/1991
  • Issued: 02/23/1993
  • Est. Priority Date: 11/13/1990
  • Status: Expired due to Fees
First Claim
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1. In a measuring instrument for an optical medium, said instrument using two optical transmitters and two optical receiver means, which can be optically coupled to the optical medium on either side thereof, and includes means for measuring, evaluating and displaying signals from the receiver means, the improvements comprising one optical transmitter and one receiver means being combined into one component, the other optical transmitter and optical receiver means being combined into another component, said components being connected via flexible leads with said means for measuring, evaluating and displaying.

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