K-LaSFn8W 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) | 1.8349 |
|---|---|
| Abbe Number (Vd) | 42.7 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.27644 - 0.0151779\,\lambda^2 + 0.0306783\,\lambda^{-2} + 0.00079396\,\lambda^{-4} + 8.2679 \times 10^{-7}\,\lambda^{-6} + 1.39136 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 6.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.11 \times 10^{-6} + 2(1.69 \times 10^{-8})\,\Delta T + 3(-2.52 \times 10^{-10})\,\Delta T^2 + \frac{4.9 \times 10^{-7} + 2(-7.53 \times 10^{-10})\,\Delta T}{\lambda - 0.253}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.88 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 2 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZLAF55C | CDGM | 1.83481 | 42.711575 | |
| S-LAH55 | Ohara | 1.834807 | 42.713673 | |
| TAFD5G | Hoya | 1.83481 | 42.72 | |
| TAFD5F | Hoya | 1.83481 | 42.72 | |
| LAH55 | Ohara | 1.834807 | 42.72372 | |
| H-ZLAF55D | CDGM | 1.83481 | 42.725177 | |
| S-LAH55V | Ohara | 1.834807 | 42.725324 | |
| S-LAH55VS | Ohara | 1.834809 | 42.74368 | |
| TAFD5 | Hoya | 1.835 | 42.984244 | |
| N-LASF41 | Schott | 1.83501 | 43.13 |