BAF50 by Schott

Obsolete Unknown Environmentally Dangerous

BAF50 by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.682726 and a Vd of 44.503507. It has medium thermal expansion (CTE of 8.3×10⁻⁶/K), average chemical resistance, moderate relative cost, 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: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.682726
Abbe Number (Vd) 44.503507
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.63007\,\lambda^2}{\lambda^2 - 0.0100983} + \frac{0.135169\,\lambda^2}{\lambda^2 - 0.045458} + \frac{1.1533\,\lambda^2}{\lambda^2 - 121.435}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.3
TCE 100/300°C (10-6/K) 9.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.41 \times 10^{-6} + 2(6.5 \times 10^{-9})\,\Delta T + 3(6.78 \times 10^{-11})\,\Delta T^2 + \frac{6.13 \times 10^{-7} + 2(1.04 \times 10^{-9})\,\Delta T}{\lambda - 0.249}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.8
Relative Cost 3.27
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance 1
Acid Resistance 5
Alkali Resistance 1
Phosphate Resistance 1
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
ZBAF51 CDGM 1.682726 44.528543
K-BaFn1 Sumita 1.6825 44.5
BAFN1 Sumita 1.6825 44.5
BAF22 Hoya 1.682496 44.671672
IRG11 Generic IR 1.680932 44.434326
BAF20 Hoya 1.685777 43.901833
ADF8 Hoya 1.686498 42.863902
BAF13 Hoya 1.668916 44.911265
BAH13 Ohara 1.668921 44.987354
BAF13 Sumita 1.66892 45.0
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
BAF13 Schott 1.668919 44.961828
BAFN10 Schott 1.670031 47.108735
N-BAF10 Schott 1.67003 47.11
BASF6 Schott 1.667551 41.931404
LAF20 Schott 1.682476 48.200977
BAF51 Schott 1.652242 44.930457
N-BAF51 Schott 1.65224 44.96
BASF52 Schott 1.70181 41.010234
BAFN11 Schott 1.666721 48.421391
BASF57 Schott 1.651474 41.901823
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