K-LaFK63 by Sumita
Standard
Rare
Precision Molding
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) | 1.6386 |
|---|---|
| Abbe Number (Vd) | 63.4 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.64392 - 0.0104705\,\lambda^2 + 0.0149026\,\lambda^{-2} + 0.00014633\,\lambda^{-4} + 1.44204 \times 10^{-5}\,\lambda^{-6} - 7.10187 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.5 |
|---|---|
| TCE 100/300°C (10-6/K) | 11.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.02 \times 10^{-5} + 2(8.45 \times 10^{-9})\,\Delta T + 3(-7.16 \times 10^{-11})\,\Delta T^2 + \frac{4.42 \times 10^{-7} + 2(5.71 \times 10^{-10})\,\Delta T}{\lambda - 0.158}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.36 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 5 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D-ZPK1A | CDGM | 1.62087 | 63.828532 | |
| PSK53A | Schott | 1.620141 | 63.480444 | |
| N-PSK53 | Schott | 1.62014 | 63.48 | |
| PCD53 | Hoya | 1.620139 | 63.516754 | |
| D-ZPK1A-25 | CDGM | 1.61999 | 63.763831 | |
| PCD40 | Hoya | 1.61997 | 63.88 | |
| MC-PCD4-40 | Hoya | 1.61921 | 63.85 | |
| MP-PCD4-40 | Hoya | 1.61921 | 63.85 | |
| M-PCD4 | Hoya | 1.61881 | 63.85 | |
| PCD4 | Hoya | 1.618 | 63.4 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-LaFK63(M) | Sumita | 1.63463 | 63.0 | |
| LAFK60 | Sumita | 1.63246 | 63.8 | |
| K-LaFK60 | Sumita | 1.63246 | 63.8 | |
| K-LaFK60(M) | Sumita | 1.62848 | 63.2 | |
| K-LaFK65(M) | Sumita | 1.65224 | 62.2 | |
| K-LaFK65 | Sumita | 1.6567 | 62.3 | |
| PSKN2 | Sumita | 1.618 | 63.4 | |
| K-PSKn2 | Sumita | 1.618 | 63.4 | |
| K-LaKn2 | Sumita | 1.6405 | 60.1 | |
| LAKN2 | Sumita | 1.6405 | 60.1 |