https://www.corning.com/cala/en/products/advanced-optics/product-materials/specialty-glass-and-glass-ceramics/ophthalmic-glass/technical-literature.html
Corning provides ophthalmic glass technical literature.
technical literatureophthalmicglassspecialtyceramics
https://aluminaceramicsparts.com/
Advanced Ceramics specialize in creating custom technical ceramic parts and offer services in designing, engineering, machining, grinding and finishing.
chinaaluminaceramicsindustrialtechnical