NOTE 1 The terminology of interferometry is used for the specification of tolerances and, in particular, for the units in which the tolerances are to be specified; however, this does not stipulate that only interferometric methods may be used for the actual testing of optical parts. Other non-interferometric methods may be used if the results are converted to the units specified here.
NOTE 2 ISO 10110-12 allows the surface form tolerance for aspheric surfaces to be specified without reference to this part of ISO 10110.
ISO 10110-5:2007