LAK13 by Sumita
Obsolete
Very Rare
Environmentally Dangerous
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) | 1.6935 |
|---|---|
| Abbe Number (Vd) | 53.4 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.81065 - 0.0102112\,\lambda^2 + 0.020473\,\lambda^{-2} + 9.78972 \times 10^{-5}\,\lambda^{-4} + 3.37893 \times 10^{-5}\,\lambda^{-6} - 1.1894 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 8.9 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.11 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-LAK6A | CDGM | 1.6935 | 53.380441 | |
| LAC13 | Hoya | 1.6935 | 53.34 | |
| LAKN13 | Schott | 1.693501 | 53.330054 | |
| LAL13 | Ohara | 1.693501 | 53.231566 | |
| S-LAL13 | Ohara | 1.693501 | 53.205327 | |
| MP-LAC130 | Hoya | 1.6935 | 53.2 | |
| P-LAK35 | Schott | 1.6935 | 53.2 | |
| M-LAC130 | Hoya | 1.6935 | 53.2 | |
| MC-LAC130 | Hoya | 1.6935 | 53.2 | |
| L-LAL13 | Ohara | 1.6935 | 53.185799 |