Method and apparatus for measuring attenuation in light waveguides for communications transmission purposes
US4317631A · kind A · utility
1Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1979 |
| Grant date | Mar 2, 1982 |
| Priority date | — |
| Expiry date | Sep 27, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/33
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method and apparatus for coupling a test piece to the transmitter and the receiver of an apparatus for measuring the attenuation of light waveguides, either a large area light emitter is inserted into the measuring path on the input side of the test piece, or a large area photo receiver is inserted on the output side of the test piece. The insertion of the large area photo receiver can be accomplished by means of a semitransparent or hinged mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.