1.Optical glass,Pyrex,borosilicat glass 2.Semi ball lens 3.Plano,Round,Ball 4.Polished Lens 5.Clear and optical quality Pyrex ... glass semi ball lens for Optics and Lighting 1. Raw material of semi ... , Grinding, Polishing3. Shape of semi ball lens: Plano convex,semi ball,ball4. Inside quality of semi ball lens: clear and transparent, no mold ...