N-SF6HTultra by Schott
Preferred
Unknown
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) | 1.80518 |
|---|---|
| Abbe Number (Vd) | 25.36 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.37 — 2.5 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.77932\,\lambda^2}{\lambda^2 - 0.0133714} + \frac{0.33815\,\lambda^2}{\lambda^2 - 0.0617534} + \frac{2.08734\,\lambda^2}{\lambda^2 - 174.018}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.03 |
|---|---|
| TCE 100/300°C (10-6/K) | 10.34 |
| Thermal Conductivity (W/mK) | 0.96 |
| Heat Capacity (J/gK) | 0.69 |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.93 \times 10^{-6} + 2(7.02 \times 10^{-9})\,\Delta T + 3(-2.4 \times 10^{-11})\,\Delta T^2 + \frac{9.84 \times 10^{-7} + 2(1.54 \times 10^{-9})\,\Delta T}{\lambda - 0.29}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.369 |
|---|---|
| Relative Cost | 6.0 |
Mechanical Properties
| Young's Modulus (GPa) | 93.0 |
|---|---|
| Poisson's Ratio | 0.26 |
| Knoop Hardness (kgf/mm²) | 550.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 0 |
| Acid Resistance | 2 |
| Alkali Resistance | 1 |
| Phosphate Resistance | 1 |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-SFLD6 | Sumita | 1.80518 | 25.4 | |
| SFLD6 | Sumita | 1.80518 | 25.4 | |
| S-TIH6 | Ohara | 1.805181 | 25.425363 | |
| TIH6 | Ohara | 1.805181 | 25.432057 | |
| PBH6W | Ohara | 1.805177 | 25.435012 | |
| PBH6 | Ohara | 1.805177 | 25.435012 | |
| H-ZF7LAGT | CDGM | 1.80518 | 25.456256 | |
| H-ZF7LA | CDGM | 1.80518 | 25.456256 | |
| FD60-W | Hoya | 1.80518 | 25.46 | |
| FD60 | Hoya | 1.80518 | 25.46 |