A five-sided prism containing two reflecting surfaces at 45° to each other, and two perpendicular faces for the entering and emerging beams. It does not invert nor revert the image.
| Material | BK7 | |||||
| Dimensions | MM | |||||
| Dimensional Tolerance | ±0.10 mm | |||||
| Surface Accuracy | ||||||
| Standard | 1/2 Wave | |||||
| Precision | 1/4 wave | |||||
| Angle Tolerance | ||||||
| Standard | ±3 arc minutes | |||||
| Precision | ± 10 seconds | |||||
| Bevel | 0.2mm x 45° | |||||
| Coating | Reflecting surfaces are Protected Aluminum. Entrance and exit surfaces are coated with 1/4 wave MgF2) | |||||
| * All dimensions are in mm | ||||||