BAF13 by Schott

Obsolete Unknown Environmentally Dangerous

BAF13 by Schott is an obsolete optical glass. It transmits from 0.36 to 2.33 µm with an nd of 1.668919 and a Vd of 44.961828. It has medium thermal expansion (CTE of 7.4×10⁻⁶/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: 0.365–2.325 µm
Optical Properties
Refractive Index (nd) 1.668919
Abbe Number (Vd) 44.961828
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.57069\,\lambda^2}{\lambda^2 - 0.00939377} + \frac{0.151295\,\lambda^2}{\lambda^2 - 0.044948} + \frac{1.07638\,\lambda^2}{\lambda^2 - 113.934}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.4
TCE 100/300°C (10-6/K) 8.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[8.12 \times 10^{-7} + 2(1.08 \times 10^{-8})\,\Delta T + 3(-1.98 \times 10^{-11})\,\Delta T^2 + \frac{6.82 \times 10^{-7} + 2(8.7 \times 10^{-10})\,\Delta T}{\lambda - 0.228}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.8
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
BAH13 Ohara 1.668921 44.987354
BAF13 Sumita 1.66892 45.0
BAF13 Hoya 1.668916 44.911265
IRG11 Generic IR 1.680932 44.434326
BAF22 Hoya 1.682496 44.671672
K-BaFn1 Sumita 1.6825 44.5
BAFN1 Sumita 1.6825 44.5
ZBAF51 CDGM 1.682726 44.528543
ATF4 Hoya 1.653757 44.723072
C70-47 Corning 1.670005 47.112037
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
BAF50 Schott 1.682726 44.503507
BAFN10 Schott 1.670031 47.108735
N-BAF10 Schott 1.67003 47.11
BAF51 Schott 1.652242 44.930457
N-BAF51 Schott 1.65224 44.96
BASF6 Schott 1.667551 41.931404
BAFN11 Schott 1.666721 48.421391
LAF20 Schott 1.682476 48.200977
BASF57 Schott 1.651474 41.901823
BAF9 Schott 1.643276 47.958224
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