BEO 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) | 1.718619 |
|---|---|
| Abbe Number (Vd) | 93.251706 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.44 — 7.0 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.92274\,\lambda^2}{\lambda^2 - 0.00625365} + \frac{1.24209\,\lambda^2}{\lambda^2 - 94.3443} + \frac{0\,\lambda^2}{\lambda^2 - 0}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
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 | |
|---|---|---|---|---|
| BEO | Generic IR | 1.718619 | 93.251706 | |
| SAPPHIRE | Generic IR | 1.768234 | 72.237215 | |
| SPINEL | Generic IR | 1.716226 | 60.607355 | |
| K-LaFK58 | Sumita | 1.6956 | 59.0 | |
| K-LaFK58(M) | Sumita | 1.69097 | 58.4 | |
| LAK23 | Schott | 1.668816 | 57.38444 | |
| S-LAL52 | Ohara | 1.669999 | 57.327972 | |
| LAL52 | Ohara | 1.669999 | 57.327972 | |
| LACL7 | Hoya | 1.669996 | 57.308358 | |
| K-LaKn4 | Sumita | 1.671 | 57.2 |
Similar Glasses (Generic Birefringent)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BEO-E | Generic Birefringent | 1.734106 | 79.335058 | |
| LAF3 | Generic Birefringent | 1.604046 | 80.83154 | |
| LAF3-E | Generic Birefringent | 1.596715 | 81.256833 | |
| AL2O3-E | Generic Birefringent | 1.760096 | 72.988091 | |
| AL2O3 | Generic Birefringent | 1.768172 | 72.308589 | |
| QUARTZ | Generic Birefringent | 1.544296 | 70.132045 | |
| LIYF4-E | Generic Birefringent | 1.476472 | 88.935059 | |
| QUARTZ-E | Generic Birefringent | 1.553398 | 68.797763 | |
| CALCITE-E | Generic Birefringent | 1.486494 | 79.064587 | |
| LIYF4 | Generic Birefringent | 1.453776 | 93.549426 |