IRG2 by Generic IR
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) | 1.891717 |
|---|---|
| Abbe Number (Vd) | 29.896648 |
| Dispersion Formula | Herzberger |
| Wavelength Range | 0.365 — 4.586 µm |
$$L = \frac{1}{\lambda^2 - 0.028}
n(\lambda) = 1.85363 + 0.0121653\,L + 6.64999 \times 10^{-5}\,L^2 - 0.0026676\,\lambda^2 - 1.29307 \times 10^{-7}\,\lambda^4 - 2.88757 \times 10^{-7}\,\lambda^6$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.8 |
|---|---|
| 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) | 5.0 |
|---|---|
| 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: Schott Spec Sheet
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAH80 | Ohara | 1.885 | 30.163795 | |
| TAFD20 | Hoya | 1.90315 | 29.835563 | |
| L-LAH86 | Ohara | 1.902699 | 31.00532 | |
| LAH78 | Ohara | 1.901355 | 31.550244 | |
| H-ZLAF75A | CDGM | 1.90366 | 31.31497 | |
| TAFD25 | Hoya | 1.90366 | 31.32 | |
| N-LASF46B | Schott | 1.90366 | 31.32 | |
| N-LASF46A | Schott | 1.90366 | 31.32 | |
| TAFD25L | Hoya | 1.90366 | 31.32 | |
| S-LAH95 | Ohara | 1.903659 | 31.343065 |
Similar Glasses (Generic IR)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| IRG3 | Generic IR | 1.844836 | 32.330322 | |
| PBF2 | Generic IR | 1.766591 | 28.390315 | |
| CSBR | Generic IR | 1.69706 | 34.108015 | |
| MGO | Generic IR | 1.737505 | 53.505455 | |
| ALON | Generic IR | 1.788917 | 58.204971 | |
| IRG11 | Generic IR | 1.680932 | 44.434326 | |
| CALCITE | Generic IR | 1.658643 | 48.541403 | |
| SPINEL | Generic IR | 1.716226 | 60.607355 | |
| GEO2 | Generic IR | 1.608459 | 41.728763 | |
| ALN | Generic IR | 2.154291 | 50.733102 |