Rutile Prism
Birefringence: The light passing through the rutile prism separates into ordinary light and extraordinary light.
The polarization state of the extraordinary light is orthogonal to that of the ordinary light.
Please use for prisms utilizing high refractive index and birefringent polarizers.
Rutile has excellent heat resistance and corrosion resistance.
| Material name | Rutile (Titanium dioxide, TiO2) |
|---|---|
| Crystal growth method | Verneuil method |
| Crystal system | Tetragonal |
| Crystal structure | Rutile |
| Color | Pale yellow |
| Purity | 99.98% |
| Density | 4.26g/cm3 |
| Rutile | YVO4 | LiNbO3 | ||
|---|---|---|---|---|
| Birefringence @1550 nm | 0.250 | 0.200 | 0.079 | |
| Refractive index @1550 nm | no | 2.444 | 1.938 | 2.219 |
| ne | 2.694 | 2.138 | 2.140 | |
| Thermal expansion coefficient (×10-6/K) | c-axis | 10.1 | 11.37 | 16.7 |
| a-axis | 7.81 | 4.43 | 7.0 | |
| Mohs hardness | 6.5 | 5 | 5 | |
Figure 1: Transmittance of rutile in the visible and near-infrared regions. 0.5 mm thick, (001) direction.
Figure 2: Refractive index of rutile in ordinary and extraordinary rays.
Figure 3: Comparison of rutile reflectance (with and without Anti-Reflective coating).
Figure 4: Reflectance of rutile with an Anti-Reflective coating (enlarged view of Figure 3).