BAF9 by Sumita

Obsolete Very Rare Environmentally Dangerous

BAF9 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.32 to 2.00 µm with an nd of 1.64328 and a Vd of 47.8. It has average chemical resistance and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.27–2.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.27–2.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–2.000 µm
Optical Properties
Refractive Index (nd) 1.64328
Abbe Number (Vd) 47.8
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.64406 - 0.00930061\,\lambda^2 + 0.0193046\,\lambda^{-2} + 0.000415076\,\lambda^{-4} + 1.69184 \times 10^{-6}\,\lambda^{-6} + 1.37843 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 8.3
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.77
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAM9 Ohara 1.643279 47.850606
BAF9 Hoya 1.643278 47.941673
BAF9 Schott 1.643276 47.958224
ZBAF2 CDGM 1.639616 48.230454
C48-46 Corning 1.647747 46.227993
CALCITE Generic IR 1.658643 48.541403
CALCITE Generic Birefringent 1.658643 48.541403
BAM8 Ohara 1.62374 47.09722
C24-47 Corning 1.624 46.940278
BAF8 Hoya 1.623739 47.054197
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-BaF9 Sumita 1.64328 47.8
BAF8 Sumita 1.62374 47.1
K-BaF8 Sumita 1.62374 47.1
K-LCV93(M) Sumita 1.66355 47.2
BAF12 Sumita 1.6393 45.0
K-LCV93 Sumita 1.6652 47.3
K-BaFn3 Sumita 1.66422 49.2
BAFN3 Sumita 1.66422 49.2
BAF11 Sumita 1.66672 48.4
SSK5 Sumita 1.65844 50.8
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