Sunny has the world's largest processing supply capacity for glass spheric lenses and has over 30 years' experience of manufacturing spherical optical lenses that are in various shapes and made from special materials. Over 30 years' spherical lenses manufacturing experience perfects process technology and quality control ability with advanced optical lens technology. Glass spherical lenses annual volume is over 200 million every year.
https://www.sunny-automotive.com/products/glass-spherical-lens-elements/