Half Penta prism is exactly an half cut from penta prism, it is widely used in telescope. Roof Half Penta prism is combined by half a penta prism and a totally internally reflecting roof which is attached to one of reflective face of the penta.
| Parameter | Standard Specification |
| Material | Optical glasses, Fused Silica, Corning 7980, CaF2, BaF2, MgF2, Silicon,Germanium, ZnSe |
| Dimension | 3 ~ 300mm |
| 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 | |
