K-FIR98UV 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) | 1.42537 |
|---|---|
| Abbe Number (Vd) | 97.8 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.25 — 2.3 µm |
$$n(\lambda) = \sqrt{2.0158 - 0.00381791\,\lambda^2 + 0.00580679\,\lambda^{-2} + 4.25587 \times 10^{-5}\,\lambda^{-4} + 7.66225 \times 10^{-7}\,\lambda^{-6} + 1.67168 \times 10^{-9}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 13.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 16.3 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.03 \times 10^{-5} + 2(-7.73 \times 10^{-9})\,\Delta T + 3(1.17 \times 10^{-11})\,\Delta T^2 + \frac{3.55 \times 10^{-7} + 2(7.78 \times 10^{-10})\,\Delta T}{\lambda - 0.111}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.75 |
|---|---|
| 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 | |
|---|---|---|---|---|
| LITHOTEC-CAF2 | Schott | 1.43385 | 95.23 | |
| CAF2 | Generic IR | 1.433849 | 94.995854 | |
| N-FK56 | Schott | 1.43425 | 94.953489 | |
| FCD100 | Hoya | 1.437 | 95.1 | |
| FPL53 | Ohara | 1.43875 | 94.960437 | |
| S-FPL53 | Ohara | 1.43875 | 94.946025 | |
| S-FPL55 | Ohara | 1.43875 | 94.661059 | |
| D-FK95 | CDGM | 1.4378 | 94.523389 | |
| H-FK95N | CDGM | 1.4378 | 94.523389 | |
| D-FK95-25 | CDGM | 1.43744 | 94.438841 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-FIR97UV | Sumita | 1.4258 | 97.4 | |
| K-CaFK95(M) | Sumita | 1.43312 | 95.0 | |
| CAFK95 | Sumita | 1.43425 | 95.0 | |
| K-CaFK95 | Sumita | 1.43425 | 95.0 | |
| K-FIR100UV(M) | Sumita | 1.41268 | 100.7 | |
| K-FIR100UV | Sumita | 1.4139 | 101.0 | |
| K-PFK90 | Sumita | 1.4588 | 90.0 | |
| K-PFK90(M) | Sumita | 1.45733 | 89.8 | |
| PFK85 | Sumita | 1.48563 | 85.2 | |
| K-PFK85 | Sumita | 1.48563 | 85.2 |