K-SFLD6 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) | 1.80518 |
|---|---|
| Abbe Number (Vd) | 25.4 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.4 — 1.55 µm |
$$n(\lambda) = \sqrt{3.1176 - 0.0121082\,\lambda^2 + 0.0446897\,\lambda^{-2} + 0.00165748\,\lambda^{-4} + 4.19844 \times 10^{-5}\,\lambda^{-6} + 1.29135 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 10.7 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-6.59 \times 10^{-6} + 2(1.77 \times 10^{-8})\,\Delta T + 3(-2.13 \times 10^{-10})\,\Delta T^2 + \frac{1.11 \times 10^{-6} + 2(8.72 \times 10^{-10})\,\Delta T}{\lambda - 0.277}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.4 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| SFL6 | Schott | 1.80518 | 25.39 | |
| S-TIH6 | Ohara | 1.805181 | 25.425363 | |
| SF6HT | Schott | 1.80518 | 25.43 | |
| SF6 | Schott | 1.80518 | 25.43 | |
| TIH6 | Ohara | 1.805181 | 25.432057 | |
| PBH6 | Ohara | 1.805177 | 25.435012 | |
| PBH6W | Ohara | 1.805177 | 25.435012 | |
| N-SF6HT | Schott | 1.80518 | 25.36 | |
| N-SF6HTultra | Schott | 1.80518 | 25.36 | |
| N-SF6 | Schott | 1.80518 | 25.36 |