We have available for production, literally hundreds of optical glass types for lens production. Schott, O’Hara, Hoya, CDGM etc. Some of the specialised types are limited by the moulded size of the glass billet and as such, may limit the achievable design size where this is a limiting factor.
We don’t issue stock holdings of glass because it is always changing due to intake and usage. If any specific design is under consideration we would advise if any quantity of a particular glass type would be a limiting consideration for the project.