BASF12 by Sumita

Obsolete Very Rare Environmentally Dangerous

BASF12 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.35 to 2.00 µm with an nd of 1.66998 and a Vd of 39.2. It has good 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: 0.350–2.000 µm
Optical Properties
Refractive Index (nd) 1.66998
Abbe Number (Vd) 39.2
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.71573 - 0.00858507\,\lambda^2 + 0.0243\,\lambda^{-2} + 0.000653748\,\lambda^{-4} - 2.61141 \times 10^{-6}\,\lambda^{-6} + 3.78214 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 8.7
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) 3.86
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BASF12 Schott 1.669979 39.200523
S-BAH32 Ohara 1.669979 39.271035
BAH32 Ohara 1.669979 39.279752
S-NBH52V Ohara 1.673 38.256077
S-NBH52 Ohara 1.672999 38.14817
BPH40 Ohara 1.676498 37.537388
ADF405 Hoya 1.6765 37.477902
C55-40 Corning 1.6555 40.115717
H-TF5 CDGM 1.6541 39.539424
E-ADF50 Hoya 1.65412 39.62
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
BASF10 Sumita 1.65016 39.3
K-BaSF4 Sumita 1.65128 38.3
BASF4 Sumita 1.65128 38.3
BASF6 Sumita 1.66755 41.9
K-PG395 Sumita 1.658 36.9
K-PG395(M) Sumita 1.65296 36.8
BASF2 Sumita 1.66446 35.9
BASF7 Sumita 1.70154 41.1
K-PSFn166 Sumita 1.663 34.4
K-PSFn166(M) Sumita 1.65858 34.4
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