M-LAC14 by Hoya
Preferred
Common
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) | 1.6968 |
|---|---|
| Abbe Number (Vd) | 55.46 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{2.82784 - 0.0147739\,\lambda^2 + 0.0182117\,\lambda^{-2} + 0.00049312\,\lambda^{-4} - 2.54869 \times 10^{-5}\,\lambda^{-6} + 1.67955 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.2 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.58 \times 10^{-6} + 2(9.13 \times 10^{-9})\,\Delta T + 3(-2.75 \times 10^{-11})\,\Delta T^2 + \frac{5.67 \times 10^{-7} + 2(5.14 \times 10^{-10})\,\Delta T}{\lambda - 0.131}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.7 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 5 |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Glass for molded optics lens
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAKN14 | Schott | 1.6968 | 55.410215 | |
| N-LAK14 | Schott | 1.6968 | 55.41 | |
| C97-55 | Corning | 1.697005 | 55.409848 | |
| H-LAK51A | CDGM | 1.6968 | 55.526357 | |
| LAL14 | Ohara | 1.696796 | 55.528037 | |
| S-LAL14 | Ohara | 1.696797 | 55.532241 | |
| LAK14 | Sumita | 1.6968 | 55.6 | |
| K-LaK14 | Sumita | 1.6968 | 55.6 | |
| H-LAK12 | CDGM | 1.6968 | 56.175305 | |
| C97-56 | Corning | 1.697 | 56.222926 |