DIN ISO 12123:2011-10

As a rule, drawings for optical elements contain information on glass properties in accordance with the specifications of ISO 10110. There might be misunderstandings when ordering glass for the manufacture of optical elements as the requirements of ISO 10110 for the elements cannot be directly transferred to raw optical glass. That is because raw optical glass can be delivered in very different shapes, from very near net shape elements as pressings up to very far away in the shape of a glass block. Therefore, this standard gives rules for the specification of raw optical glass. It serves as a complement to ISO 10110, which provides rules specifying finished optical elements. This standard 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 (for example, lasers, the infrared spectral range), specifications based on this standard will have to be supplemented. The committee responsible for this standard is NA 027-01-05 AA "Optische Werkstoffe" ("Optical materials") at DIN.