Endface assessment
US5042943A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1990 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | May 17, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for measuring the endface angle of a cleaved optical fibre (1) includes a light source (3) for injecting optical energy into that end (1a) of the optical fibre (1) opposite to that whose endface angle is to be measured. Means are provided for tapping optical energy passing along the optical fiber (1) in both directions. Photodetectors (5,6) measure the signal strength of the optical energy tapped from the optical fibre (1) in both directions. The ratio of these measured signal strengths is compared with a known relationship between endface angles and the ratio of said measured signals to provide a measure of the endface angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.