BAF12 by Sumita

Obsolete Very Rare Environmentally Dangerous

BAF12 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.34 to 2.00 µm with an nd of 1.6393 and a Vd of 45.0. 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: 0.340–2.000 µm
Optical Properties
Refractive Index (nd) 1.6393
Abbe Number (Vd) 45.0
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.62637 - 0.00818224\,\lambda^2 + 0.021213\,\lambda^{-2} + 0.000153083\,\lambda^{-4} + 4.35373 \times 10^{-5}\,\lambda^{-6} - 3.16924 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 8.6
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) 3.73
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
BAF12 Hoya 1.639302 45.070071
BAM12 Ohara 1.6393 44.878032
S-BAM12 Ohara 1.6393 44.872804
C48-46 Corning 1.647747 46.227993
N-BAF51 Schott 1.65224 44.96
BAF23 Hoya 1.652238 44.922169
BAF51 Schott 1.652242 44.930457
ATF4 Hoya 1.653757 44.723072
C38-42 Corning 1.637752 42.433862
N-KZFS11 Schott 1.63775 42.41
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-BaF9 Sumita 1.64328 47.8
BAF9 Sumita 1.64328 47.8
K-LCV161 Sumita 1.6182 45.3
K-BaF8 Sumita 1.62374 47.1
BAF8 Sumita 1.62374 47.1
K-LCV161(M) Sumita 1.61477 45.6
KZFS4 Sumita 1.6134 43.8
K-LCV93(M) Sumita 1.66355 47.2
BAF13 Sumita 1.66892 45.0
K-LCV93 Sumita 1.6652 47.3
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