MSR PRO Penta Prisms
MSR PRO™ Penta Prisms
MSE Supplies offers standard and customized Penta Prisms with different materials, dimension, surface qualify, etc.
A Penta prism is a five-sided reflecting prism used to deviate a beam of light by a constant 90°, even if the entry beam is not at 90° to the prism. Since the beams are incident at an angle less than the critical angle, the reflections inside the prism are not caused by total internal reflection. Thus, the two reflecting surfaces need to be coated to provide mirror surfaces. It is widely used in metrology, when people need to find exact perpendicular positions.
Technical Data:
| Parameters | Value |
| Material | N-BK7/H-K9L |
| Size (mm) | 10-200 |
| Size Tolerance (mm) | ±0.0/-0.2 |
| Surface Flatness | λ/10@632.8nm |
| Surface Quality | 60/40-40/20 |
| Bevel | <0.25mm x 45° |
| Beam Deflection Angle | 90° |
| Angle Error | ±30'' |
| Coating | Reflective surface: Al coating + black paint protection Incident surface and exit surface: Single layer MgF2 AR Coating |
MSE Supplies can offer a variant of optical elements, with different materials, size, surface quality and coating. Please contact us for customization or bulk orders.