Porro prism is a type of reflection prism which can be used to alter the orientation of an image. Light enters the large face of the prism, then hits on the roof, by total internal reflection twice from the roof, the beam exits again through the large face. An image traveling through a Porro prism is rotated by 180deg but not inverted.
| Parameter | Standard Specification |
| Material | Optical glasses, Fused Silica, Corning 7980, CaF2, BaF2, MgF2, Silicon,Germanium, ZnSe |
| Dimension | 3 ~ 200mm |
| Dimension tolerance | +/-0.01 ~ +/-0.2mm |
| Surface quality | 10-5 ~ 80-50 |
| Angle Tolerance | 90。+/-1”, others+/-30”~+/-3’ |
| Parallelism | <3 arc minutes |
| Flatness(in 25mm area) | N=0.5, ∆N=0.1 |
| Clear Aperture | >90% |
| Chamfer | 0.3mm@45 degree |
| Coating | AR coating, Reflection coating, Splitter coating etc. |
| * Remark：Customized is available | |
