| Penta prisms are one kind of constant deviation (90º) prisms. The prisms feature that they deviate an input beam by 90 degrees independently of the angle of incidence on the first surface and that they are not like right angle prisms. The images deviated by penta prisms are neither inverted nor reversed. |
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| Material | UV grade fused silica, BK7, SF10 |
| Size | 15mm－30mm |
| Dimension Tolerance | +0.0/-0.2mm |
| Angle Tolerance | +/-3 arc min |
| Flatness | 1/10λ－1λ |
| Surface Quality | 10/5－80/50 |
| Chamfer | 0.2mm at 45°typical |
| Coating | as requested |