LASF33 by Schott

Obsolete Unknown Environmentally Dangerous

LASF33 by Schott is an obsolete optical glass. It transmits from 0.38 to 2.33 µm with an nd of 1.805958 and a Vd of 34.242133. It has medium thermal expansion (CTE of 8.7×10⁻⁶/K) 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: 0.380–2.325 µm
Optical Properties
Refractive Index (nd) 1.805958
Abbe Number (Vd) 34.242133
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.90477\,\lambda^2}{\lambda^2 - 0.0117757} + \frac{0.248374\,\lambda^2}{\lambda^2 - 0.0528083} + \frac{1.18109\,\lambda^2}{\lambda^2 - 108.155}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.7
TCE 100/300°C (10-6/K) 9.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.85 \times 10^{-6} + 2(8.94 \times 10^{-9})\,\Delta T + 3(-5.97 \times 10^{-12})\,\Delta T^2 + \frac{8.69 \times 10^{-7} + 2(1.09 \times 10^{-9})\,\Delta T}{\lambda - 0.262}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.48
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
NBFD15 Hoya 1.8061 33.27
NBFD15-W Hoya 1.8061 33.27
H-ZLAF56B CDGM 1.8061 33.268324
LAM66 Ohara 1.800999 34.965762
H-ZLAF66GT CDGM 1.801 34.966919
H-ZLAF66 CDGM 1.801 34.966919
S-LAM66 Ohara 1.800999 34.967403
NBFD8 Hoya 1.807401 35.542096
M-NBFD82 Hoya 1.814741 37.027807
S-LAM73 Ohara 1.7936 37.08945
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-LASF45HT Schott 1.80107 34.97
N-LASF45 Schott 1.80107 34.97
LASF36A Schott 1.797117 35.080117
LASF32 Schott 1.803493 30.397148
LASF14A Schott 1.822226 37.454652
LAF22A Schott 1.781791 37.196288
N-LASF40 Schott 1.83404 37.3
LAF13 Schott 1.775507 37.836043
LAF9 Schott 1.79504 28.393185
P-LASF50 Schott 1.8086 40.46
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