1 Scope
This part of IEC 61300 is concerned with the observation and classification of debris, scratches and defects. The inspection requirements are based on IEC TR 62627‑05. Advice for cleaning of contamination from fibres/ferrule is found in IEC TR 62627‑01 and a recommendation is given in Annex D. IEC TR 62572‑4 provides the cleaning method for a stub for optical transceivers. Visual inspection
is in addition to, and does not replace measurement of performance parameters such
as attenuation and return loss, or end face parameters. The dimensions specified are
chosen such that they can be easily estimated. Not only the zones A and B on the fibre
are inspected for defects and scratches but the whole contact area (where the two fibres/ferrules meet when
mated) needs to be inspected for contamination (this is up to 250 µm diameter for
cylindrical ferrules and the whole ferrule surface for rectangular ferrules).
The objectives of this document are the following:
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• specify the minimum criteria for a microscope to be compliant to this document;
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• specify the procedure and criteria for inspecting fibre-optic end faces for cleanliness
to determine if the end faces are fit for use. All connector optical interfaces (IEC 61755 series and IEC 63267 series) are based on physical contact between fibre cores;
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• provide quantitative criteria for the analysis of end face images.