AL2O3 by Generic Birefringent
Standard
Unknown
Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
Optical Properties
| Refractive Index (nd) | 1.768172 |
|---|---|
| Abbe Number (Vd) | 72.308589 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.2 — 5.5 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.43135\,\lambda^2}{\lambda^2 - 0.00527993} + \frac{0.650547\,\lambda^2}{\lambda^2 - 0.0142383} + \frac{5.3414\,\lambda^2}{\lambda^2 - 325.018}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.65 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.8 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | — |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
source: Handbook of Optics Vol. II
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| SAPPHIRE | Generic IR | 1.768234 | 72.237215 | |
| ALON | Generic IR | 1.788917 | 58.204971 | |
| K-LaK18 | Sumita | 1.72916 | 54.7 | |
| LAK18 | Sumita | 1.72916 | 54.7 | |
| H-LAK52 | CDGM | 1.72916 | 54.684737 | |
| LAL18 | Ohara | 1.729157 | 54.683134 | |
| S-LAL18 | Ohara | 1.729157 | 54.680013 | |
| TAC8 | Hoya | 1.72916 | 54.67 | |
| TAC8P | Hoya | 1.72916 | 54.54 | |
| N-LAK34 | Schott | 1.72916 | 54.5 |
Similar Glasses (Generic Birefringent)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| AL2O3-E | Generic Birefringent | 1.760096 | 72.988091 | |
| BEO-E | Generic Birefringent | 1.734106 | 79.335058 | |
| BEO | Generic Birefringent | 1.718619 | 93.251706 | |
| BBO | Generic Birefringent | 1.670737 | 52.593907 | |
| LAF3 | Generic Birefringent | 1.604046 | 80.83154 | |
| LAF3-E | Generic Birefringent | 1.596715 | 81.256833 | |
| CALCITE | Generic Birefringent | 1.658643 | 48.541403 | |
| QUARTZ-E | Generic Birefringent | 1.553398 | 68.797763 | |
| QUARTZ | Generic Birefringent | 1.544296 | 70.132045 | |
| BBO-E | Generic Birefringent | 1.552518 | 61.321496 |