能将光线以最小的散射反射回其光源。它是为了在狭窄的光束中返回远距离的光，有效地反转入射光波的方向。
| Material | optical glass/BK7/K9/UV fused silica/CaF2/ZnSe |
| Dimension | 0.75-200mm |
| Dimensional Tolerance | ±0.01mm |
| Angle Tolerance | ±3' |
| Surface Flatness | 1/4Lambda |
| Effective aperture | >90% |
| Surface Quality | 60/40, 40/20 20/10 or better |
| Bevel | 0.1-0.3mmx45° |
可以按你的需求定制
