TIA-455-225:2015

Scope and object

In the research and production environments there exists a range
of test methods for characterizing the geometry of optical fibres.
Furthermore, each test method may determine one or more of the many
parameters required for complete geometrical characterization. This
International Standard describes the calibration of test sets which
perform end-face image analysis, also known as near-field or
grey-scale analysis. The principles, however, may be applied to
test sets of a different type.

This standard addresses the calibration of measurements made on
single-mode fibres only; however, this type of test set may also be
used to measure the geometrical parameters of the cores of
multimode fibres, but the evaluation of uncertainties associated
with these measurements is beyond the scope of this standard.

The procedures outlined are to be performed by calibration
laboratories and by the manufacturers or users of geometry test
sets, for the purpose of calibrating geometry test sets and for
evaluating the uncertainties in measurements made on calibrated
test sets. The calibration of fibre coating or cable measurement
test sets is not covered by this standard.

The object of this standard is to define a standard procedure
for the calibration of test sets for measuring the glass geometry
of optical fibres.