K-GIR79 by Sumita
Standard
Rare
Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.8592 |
|---|---|
| Abbe Number (Vd) | 33.0 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 2.3 µm |
$$n(\lambda) = \sqrt{3.33096 - 0.0085102\,\lambda^2 + 0.0403322\,\lambda^{-2} + 0.00140098\,\lambda^{-4} - 1.98881 \times 10^{-5}\,\lambda^{-6} + 7.11745 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[7.26 \times 10^{-6} + 2(1.6 \times 10^{-8})\,\Delta T + 3(-2.45 \times 10^{-10})\,\Delta T^2 + \frac{1.26 \times 10^{-6} + 2(1.15 \times 10^{-9})\,\Delta T}{\lambda - 0.23}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 5.17 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZLAF71 | CDGM | 1.85026 | 32.297288 | |
| LAH71 | Ohara | 1.850259 | 32.28594 | |
| S-LAH71 | Ohara | 1.850259 | 32.27012 | |
| H-ZLAF71AGT | CDGM | 1.85026 | 32.216801 | |
| TAFD9 | Hoya | 1.850299 | 32.181026 | |
| N-LASF9 | Schott | 1.85025 | 32.17 | |
| N-LASF9HT | Schott | 1.85025 | 32.17 | |
| LASFN9 | Schott | 1.85025 | 32.17 | |
| IRG3 | Generic IR | 1.844836 | 32.330322 | |
| NBFD30 | Hoya | 1.85883 | 30.0 |