In our production devision for flat optics, we have double side polishing machines and we can achieve flatness better than 3/ 0,2(0,2) (Lambda/10 per MIL, Lambda/20 for some sizes) and surface quality 5/3×0,025 per ISO (10-5 S/D per MIL). Some of our customers are leading European companies for optics, which is a reference for our good quality and service.