BASF8 by Sumita

Obsolete Very Rare Environmentally Dangerous

BASF8 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 1.72342 and a Vd of 38.0. 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) 1.72342
Abbe Number (Vd) 38.0
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.8897 - 0.0120818\,\lambda^2 + 0.0256638\,\lambda^{-2} + 0.00143039\,\lambda^{-4} - 9.4809 \times 10^{-5}\,\lambda^{-6} + 8.75721 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 7.4
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) 4.24
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
H-ZBAF21 CDGM 1.72341 37.991564
BAFD8 Hoya 1.72342 37.99
D23-38 Corning 1.72349 37.995089
BAH78 Ohara 1.723421 38.03427
S-BAH28 Ohara 1.72342 37.955602
BAH28 Ohara 1.72342 37.949115
BASF51 Schott 1.723728 38.111094
D-LAF79-25 CDGM 1.72986 40.497566
MP-LAF81 Hoya 1.73077 40.5
M-LAF81 Hoya 1.73077 40.5
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-ZnSF8 Sumita 1.7143 38.9
ZNSF8 Sumita 1.7143 38.9
K-ZnSF8(M) Sumita 1.71143 38.9
LAFN10 Sumita 1.72016 42.1
BASF7 Sumita 1.70154 41.1
LAF70 Sumita 1.7495 35.0
LAFN4 Sumita 1.72 43.7
K-CD45 Sumita 1.6932 33.7
CD45 Sumita 1.6932 33.7
LAFN9 Sumita 1.764 40.3
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