K-SFLD11 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) | 1.78472 |
|---|---|
| Abbe Number (Vd) | 25.9 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.4 — 1.55 µm |
$$n(\lambda) = \sqrt{3.05291 - 0.012277\,\lambda^2 + 0.0414878\,\lambda^{-2} + 0.00190438\,\lambda^{-4} - 3.16532 \times 10^{-5}\,\lambda^{-6} + 1.73204 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 10.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.51 \times 10^{-6} + 2(1.82 \times 10^{-8})\,\Delta T + 3(-3.64 \times 10^{-10})\,\Delta T^2 + \frac{1.08 \times 10^{-6} + 2(1.52 \times 10^{-9})\,\Delta T}{\lambda - 0.28}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.3 |
|---|---|
| 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 | |
|---|---|---|---|---|
| D85-26 | Corning | 1.784994 | 25.902085 | |
| D85-25 | Corning | 1.784752 | 25.799504 | |
| SF11 | Schott | 1.78472 | 25.76 | |
| ZF13 | CDGM | 1.784724 | 25.754051 | |
| FDS3 | Hoya | 1.7847 | 26.057653 | |
| ZF51 | CDGM | 1.784701 | 26.075871 | |
| SFL56 | Schott | 1.7847 | 26.078312 | |
| H-ZF13GT | CDGM | 1.78472 | 25.720045 | |
| H-ZF13 | CDGM | 1.78472 | 25.720045 | |
| FD110 | Hoya | 1.78472 | 25.72 |