LAK10 by Schott

Obsolete Unknown Environmentally Dangerous

LAK10 by Schott is an obsolete optical glass. It transmits from 0.33 to 2.50 µm with an nd of 1.72 and a Vd of 50.41004. It has low thermal expansion (CTE of 5.7×10⁻⁶/K), below average chemical resistance, high relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.334–2.500 µm
Optical Properties
Refractive Index (nd) 1.72
Abbe Number (Vd) 50.41004
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.67483\,\lambda^2}{\lambda^2 - 0.00849325} + \frac{0.222669\,\lambda^2}{\lambda^2 - 0.0330463} + \frac{1.13957\,\lambda^2}{\lambda^2 - 80.4373}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.7
TCE 100/300°C (10-6/K) 6.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.95 \times 10^{-6} + 2(8.33 \times 10^{-9})\,\Delta T + 3(1.68 \times 10^{-11})\,\Delta T^2 + \frac{4.84 \times 10^{-7} + 2(7.28 \times 10^{-10})\,\Delta T}{\lambda - 0.221}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.81
Relative Cost 8.67
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance 2
Acid Resistance 52
Alkali Resistance 1
Phosphate Resistance 3
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
LAC10 Hoya 1.72 50.35
H-LAK8A CDGM 1.72 50.343857
D20-50 Corning 1.720003 50.312121
K-LaK10 Sumita 1.72 50.3
LAK10 Sumita 1.72 50.3
H-LAK8B CDGM 1.72 50.280736
LAL10 Ohara 1.719995 50.254429
S-LAL10 Ohara 1.719995 50.230564
H-LAK72 CDGM 1.713 51.80665
LAKN12 Sumita 1.7335 51.2
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-LAK10 Schott 1.72003 50.62
LAK16A Schott 1.733501 51.779678
LAF3 Schott 1.716998 47.961124
N-LAF3 Schott 1.717 47.96
LAK28 Schott 1.744287 50.770906
N-LAK28 Schott 1.74429 50.77
N-LAF35 Schott 1.7433 49.4
N-LAK8 Schott 1.713 53.83
LAK8 Schott 1.713003 53.831633
LAFN23 Schott 1.689004 49.711581
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