Distance correction method and the controller for the reflectometer
US5978075A · kind A · utility
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4Claims
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Key dates
| Filing date | May 28, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/31
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance correction method and the controller for a reflectometer is disclosed which is able to perform accurate correction of the distances measured by reflectometer. In the distance correction method for the reflectometer which measures the Fresnel reflection or Raleigh back-scattering light of an optical fiber or an optical waveguide, the distance correction D.sub.wg1 -D.sub.wgn is performed according to the respective group refraction ratios which are the parameters of the optical fiber or the optical waveguides longitudinally connected with having different known group refraction ratios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.