The roof prism is not an independent prism shape, but rather incorporates a "roof" structure added to one reflective surface of a conventional prism. It possesses a unique capability to correct mirror reversal (left-right inversion) of images without introducing additional optical path deviation.
Corrects image reversal: Produces a fully correctly oriented image.
Integrated functionality: Combines beam steering and image erection within a single prism.
Extremely challenging manufacturing process and high cost.
| Material | BK7 grade A, B270, UV grade Fused Silica, Sapphire |
| Diameter Tolerance | +0.00,-0.05 mm (standard), up to +0.000/-0.002mm |
| Cyindrical Surface figure | 2λ@632.8nm (standard), up to λ/4 @632.8nm |
| Surface Quality | 60-40 S/D (standard), up to 20-10 S/D |
| Coating | Uncoated |
