The phase film is a kind of special film coated the Shimite roofprism of binoculars.
望远镜斯密特屋脊棱镜表面镀上相位膜，可提高望远镜的观察效果。
2
Four - prism dual - down brackets for Tsui Kum Ngong face, with Aung roof beam depth of three meters, all really Aung.
四角柱斗拱上为双抄下昂咀琴面，昂屋梁深入屋顶内达三米，全为真昂。
3
The automatic test of Corner Cube Reflector (CCR), RoofPrism and Right-angle Prism is achieved by calculating the wavefront got from the digital phase-shifting interferometer.