This document describes the calibration of test sets that perform end-face image analysis,
also known as "near-field" or "grey-scale" analysis. The principles, however, can be applied to
test sets of a different type.
The procedures outlined are 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 document.