LAC10 by Hoya
Special
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) | 1.72 |
|---|---|
| Abbe Number (Vd) | 50.35 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{2.8952 - 0.0117012\,\lambda^2 + 0.0221265\,\lambda^{-2} + 0.000384948\,\lambda^{-4} - 7.98083 \times 10^{-6}\,\lambda^{-6} + 1.50351 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.44934 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.87 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 4 |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Not in a position to accept new order because of discontinuation.
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-LAK8A | CDGM | 1.72 | 50.343857 | |
| D20-50 | Corning | 1.720003 | 50.312121 | |
| LAK10 | Sumita | 1.72 | 50.3 | |
| K-LaK10 | Sumita | 1.72 | 50.3 | |
| LAK10 | Schott | 1.72 | 50.41004 | |
| H-LAK8B | CDGM | 1.72 | 50.280736 | |
| LAL10 | Ohara | 1.719995 | 50.254429 | |
| S-LAL10 | Ohara | 1.719995 | 50.230564 | |
| N-LAK10 | Schott | 1.72003 | 50.62 | |
| H-LAK72 | CDGM | 1.713 | 51.80665 |