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