When producing fiber optic patch cord assemblies, manufacturers use 3D interferometer (which is an optical interferometry instrument) to check the fiber optic connector endface and strictly control the dimensions of the connector endface. The end face geometry of multi-fiber (MPO) connectors is a key factor in controlling connector performance, directly affecting insertion loss (IL) and return loss (RL). Measuring end-face 3D parameters such as ferrule X/Y-angle (Sx/Sy), fiber height (H), minus coplanarity (CF), ferrule surface. Standards such as IEC 61300-3-47, Basic test and measurement procedures for end face geometry of PC/APC spherically polished ferrules using interferometry, and a series of IEC 61755 standards covering angle polishing, ferrule geometry, materials, and other connector parts, provide precise. Accuracy is extremely good in providing a 2D profile but measuring a surface can be time consuming. This is the 3rd of a 3 part post from the white paper entitled "Fiber Optic 3D Metrology".
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