NBN ISO 12123:2021

This document gives rules for the specification of raw optical glass. It serves as a complement to the
ISO 10110 series, which provides rules specifying finished optical elements. Since raw optical glass can
be quite different in shape and size from the optical elements, its specification also differs from that of
optical elements.
This document provides guidelines for the essential specification characteristics of raw optical glass
in order to improve communication between glass suppliers and optical element manufacturers. For
specific applications (e.g. lasers, the infrared spectral range), specifications based on this document
need supplements.
While the intent of this document is to address the specific needs of raw optical glass, many of the
parameters and characteristics are common to other optical materials, which are not necessarily glass.
While this document can be used for non-glass materials, the user is informed that only optical glass
has been considered in the development of this document, and other materials can have issues, which
have not been taken into consideration.
NOTE Additional information on how to translate optical element specifications into raw optical glass
specifications is given in Annex A.