N-LAF32 by Schott

Obsolete Unknown Environmentally Friendly

N-LAF32 by Schott is an obsolete optical glass. It transmits from 0.35 to 2.50 µm with an nd of 1.79457 and a Vd of 45.53. It has low thermal expansion (CTE of 5.89×10⁻⁶/K) and below average chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.35–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.35–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.350–2.500 µm
Optical Properties
Refractive Index (nd) 1.79457
Abbe Number (Vd) 45.53
Dispersion Formula Sellmeier
Wavelength Range 0.35 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.91731\,\lambda^2}{\lambda^2 - 0.009786} + \frac{0.22402\,\lambda^2}{\lambda^2 - 0.0386141} + \frac{1.22087\,\lambda^2}{\lambda^2 - 84.6431}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.89
TCE 100/300°C (10-6/K) 6.98
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.8 \times 10^{-6} + 2(1.1 \times 10^{-8})\,\Delta T + 3(-1.83 \times 10^{-11})\,\Delta T^2 + \frac{6.37 \times 10^{-7} + 2(8.03 \times 10^{-10})\,\Delta T}{\lambda - 0.196}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.325
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 51
Alkali Resistance 1
Phosphate Resistance 2
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
TAF2 Hoya 1.7945 45.39
S-LAH67 Ohara 1.794997 45.293967
LAH67 Ohara 1.794997 45.293967
LASFN19 Sumita 1.795 45.2
E00-46 Corning 1.800001 45.608618
M-TAF31 Hoya 1.80139 45.45
MP-TAF31-15 Hoya 1.80154 45.47
MC-TAF31-15 Hoya 1.80154 45.47
D-ZLAF50-25 CDGM 1.80225 45.452746
D-ZLAF50 CDGM 1.80337 45.491557
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
LASFN30 Schott 1.803181 46.379894
N-LASF44 Schott 1.8042 46.5
N-LAF33 Schott 1.78582 44.05
LAFN10 Schott 1.784432 43.950523
LAFN21 Schott 1.788309 47.470398
N-LAF21 Schott 1.788 47.49
N-LAF36 Schott 1.79952 42.37
P-LASF47 Schott 1.8061 40.9
LAFN28 Schott 1.773142 49.568242
P-LASF51 Schott 1.81 40.93
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