Corner Cube is composed of three mutually perpendicular right-angled faces. The incident light forms a total reflection on the three right-angled faces and returns along the original path. The Corner Cube is insensitive to the incident angle of the light and is often used in laser rangefinders.
| Material | high quality K9 or fused quartz |
| Dimensions | <φ25.4, according to customer requirements. |
| Beam separation angle | ±3", ±5", ±8" |
| Surface accuracy | ≤λ/10 @632.8nm (reflection surface) |
| Surface quality | IV grade |
| Effective aperture | >90% |