Non-polarizing Beamsplitter Cube consists of a pair of precision high tolerance right angle prisms cemented together with a metallic-dielectric coating on the hypotenuse of one of the prisms. The low polarization dependence of the metallic-dielectric coating allows the transmission and reflection for S- and P- polarization states to be within 5% of each other. This means that they will not change the state of polarization of the incident beam.
| ATTRIBUTE | SPECIFICATIONS |
| material | N-BK7 |
| DIAMETER TOLERANCE | +0.1, -0.1mm |
| beam deviation | +/- 3 minutes |
| CLEAR APERTURE | >90% |
| flatness | λ/4@632.8nm |
| SURFACE FIGURE: IRREGULARITY(N) | <0.5 fringe |
| SURFACE QUALITY | 60/40 scratch and dig |
| BEVEL | < 0.3 mm x 45° |
| COATING | Non-polarization beamsplitter coating on hypotenuse surface, and AR coating on outside surfaces. |
| extinction ratio | 46/46 +/-5%, │Ts - Tp│< 5%, │Rs - Rp│< 5% |
