| Corner cube prisms reflect input beam by 180 degrees independently of its angle of incidence with the function of total internal reflection based on critical angle. This means that any light incident on the aperture will emerge along the same path that it came from in high reflectance. |
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| Material | UV grade fused silica, BK7 |
| Size | 10mm-76.2mm |
| Dimension Tolerance | +0.0/-0.2mm |
| Angle Tolerance | 5 arc sec – 3 arc min |
| Perpendicularity | 30 arc sec |
| Flatness | 1/10λ－1λ |
| Surface Quality | 20/10－80/50 |
| Chamfer | 0.2mm at 45°typical |
| Coating | as requested |