LASF32 by Schott

Obsolete Unknown Environmentally Dangerous

LASF32 by Schott is an obsolete optical glass. It transmits from 0.36 to 2.50 µm with an nd of 1.803493 and a Vd of 30.397148. It has medium thermal expansion (CTE of 7.9×10⁻⁶/K), excellent 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: 0.365–2.500 µm
Optical Properties
Refractive Index (nd) 1.803493
Abbe Number (Vd) 30.397148
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.84091\,\lambda^2}{\lambda^2 - 0.0120091} + \frac{0.293073\,\lambda^2}{\lambda^2 - 0.0560734} + \frac{2.01292\,\lambda^2}{\lambda^2 - 152.279}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.9
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.21 \times 10^{-7} + 2(8.93 \times 10^{-9})\,\Delta T + 3(-1.82 \times 10^{-11})\,\Delta T^2 + \frac{8.61 \times 10^{-7} + 2(1.26 \times 10^{-9})\,\Delta T}{\lambda - 0.273}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.52
Relative Cost 16.31
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance 0
Acid Resistance 1
Alkali Resistance 1
Phosphate Resistance 1
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-NBH55 Ohara 1.799999 29.844688
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S-NBH58 Ohara 1.7888 28.42865
H-ZLAF56B CDGM 1.8061 33.268324
NBFD15-W Hoya 1.8061 33.27
NBFD15 Hoya 1.8061 33.27
E37-30 Corning 1.836406 30.205692
H-TF29 CDGM 1.77047 29.806014
NBFD29 Hoya 1.77047 29.74
LAM66 Ohara 1.800999 34.965762
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
LAF9 Schott 1.79504 28.393185
LASF33 Schott 1.805958 34.242133
N-LASF45HT Schott 1.80107 34.97
N-LASF45 Schott 1.80107 34.97
LASF36A Schott 1.797117 35.080117
SF6HT Schott 1.80518 25.43
SF6 Schott 1.80518 25.43
N-SF56 Schott 1.7847 26.1
SFL6 Schott 1.80518 25.39
SF56A Schott 1.7847 26.08
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