1. Glass : Optical grade glass imported from Japan.
2. Coating : Chromium 70% reflectivity, six layers of uniform coating, constant reflection image to ensure the realization
3. Coating plane : Plating up to 99.95% and shooting angle up to 140 degrees
4. Membrane edge : Adopt /3000r angle cutter, and the dimensional error of high-speed CNC polishing film edge treatment is less than 0.1mm
5. sample ：Scratch proof, fall resistant, can be immersed in high temperature and high pressure for 120 degrees