Optical fiber evaluation device and optical fiber evaluation method
US12085749B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2020 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Oct 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02342
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The purpose of the present invention is to provide an optical fiber evaluation equipment and an optical fiber evaluation method that evaluate the center of a cladding of an MCF and a deviation of the center of each core of the MCF from a design value with ease and high accuracy.The optical fiber evaluation equipment according to the present invention approximates the outside diameter of a cladding by a circle, based on a cross-sectional image of an MCF, and determines the center of the circle as the center of the cladding. In addition, the optical fiber evaluation equipment according to the present invention obtains the center coordinates of cores with an origin at the center of the circle, rotates the cross-sectional image so as to minimize a difference between the center coordinates and design coordinates of each core, and derives the minimum value thereof as the amount of deviation of the center of each core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.