... from 0.2 to 50mm. 3inch C-plane, 4 inch C-plane, 6 inch C-plane,8inch C-planeQuartz glass curved piece, through infrared ... , bubbles, striped, uniformity and birefringence and with general optical glass), so it is in all kinds of bad work off with ... used for the printing equipment, fiber optic equipment. 8 inch C-plane