Penta Prism is a five-sided prism containing two reflecting surfaces at 45° to each other, and two refracting faces perpendicular to the entering and emerging beams. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum.
| Material: | BK7 Grade A Optical Glass |
| Dimension: | 2.5×2.5~100.0×100.0 |
| Dimension Tolerance: | ±0.2 (General),±0.05 (High Precision) |
| 90° Deviation Tolerance： | ＜1 arc min.(General). ＜3 arc sec.(High Precision) |
| Flatness: | λ/2@633nm(General), λ/4@633nm(High Precision) |
| Reflection: | ＞90%@400-700nm |
| Angle Tolerance: | ＜3 arc min.(General).＜3 arc sec.(High Precision) |
| Surface quality: | 60/40 (General), 10/5 (High Precision) |