LASF14A by Schott

Obsolete Unknown Environmentally Dangerous

LASF14A by Schott is an obsolete optical glass. It transmits from 0.37 to 2.33 µm with an nd of 1.822226 and a Vd of 37.454652. It has low thermal expansion (CTE of 5.9×10⁻⁶/K), average chemical resistance, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.370–2.325 µm
Optical Properties
Refractive Index (nd) 1.822226
Abbe Number (Vd) 37.454652
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.96557\,\lambda^2}{\lambda^2 - 0.0107142} + \frac{0.255069\,\lambda^2}{\lambda^2 - 0.0490296} + \frac{1.41244\,\lambda^2}{\lambda^2 - 92.2399}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.9
TCE 100/300°C (10-6/K) 7.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.13 \times 10^{-6} + 2(1.22 \times 10^{-8})\,\Delta T + 3(-1.59 \times 10^{-11})\,\Delta T^2 + \frac{6.61 \times 10^{-7} + 2(9.49 \times 10^{-10})\,\Delta T}{\lambda - 0.257}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.22
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 1
Acid Resistance 4
Alkali Resistance 1
Phosphate Resistance 1
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
M-NBFD82 Hoya 1.814741 37.027807
NBFD40 Hoya 1.829 36.496616
NBFD10 Hoya 1.834 37.34
K-LaSFn14 Sumita 1.834 37.3
H-ZLAF53B CDGM 1.834 37.210555
H-ZLAF53BGT CDGM 1.834 37.210555
S-LAH60V Ohara 1.833999 37.206855
LASFN14 Sumita 1.834 37.2
S-LAH60MQ Ohara 1.833999 37.172099
LAH60 Ohara 1.834 37.166863
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-LASF40 Schott 1.83404 37.3
P-LASF50 Schott 1.8086 40.46
LASF3 Schott 1.808009 40.610164
N-LASF45 Schott 1.80107 34.97
N-LASF45HT Schott 1.80107 34.97
N-LASF43 Schott 1.8061 40.61
P-LASF51 Schott 1.81 40.93
LASF33 Schott 1.805958 34.242133
P-LASF47 Schott 1.8061 40.9
LASF36A Schott 1.797117 35.080117
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