| 摘要 |
In determining the kind to which an unknown optical fiber (1, 1') belongs an automatic fiber fusion-type splicer is used having movable clamps (21), electrodes (3), camera devices (9) and background illumination (11), all coupled to electronic circuits (25) containing control means (33) and driver and interface circuits (29, 27, 31, 28). A portion of the fiber is imaged on the light sensitive areas of the cameras through high-resolving lens systems, allowing the core of the fiber to be distinguished in the captured image, both when the fiber is cold and when it is heated such as to temperatures used in fusion-splicing to issue light. From a first picture taken of the fiber in a heated state a first light intensity profile is determined in an image processing and analysis module (15) along a line substantially perpendicular to the longitudinal direction of the fiber. This profile is further analyzed by calculating the derivative of the profile and comparing the derivative to derivatives of light intensity profiles previously determined for a optical fibers of known different kinds. A second picture is taken of the cold fiber for which also a second light intensity profile can be determined. This profile is then compared to corresponding profiles previously determined for the known optical fibers. The results of the comparing operations are finally evaluated to decide the kind of the tested fiber. |
