BASF7 by Sumita

Obsolete Very Rare Environmentally Dangerous

BASF7 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 1.70154 and a Vd of 41.1. 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) 1.70154
Abbe Number (Vd) 41.1
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.82064 - 0.00977555\,\lambda^2 + 0.0251876\,\lambda^{-2} + 0.000559494\,\lambda^{-4} + 5.67124 \times 10^{-6}\,\lambda^{-6} + 2.64246 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 7.6
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) 4.07
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
D01-41 Corning 1.701805 41.110216
H-ZBAF20 CDGM 1.70154 41.148468
BAFD7 Hoya 1.70154 41.15
BASF52 Schott 1.70181 41.010234
BAH77 Ohara 1.701539 41.21001
S-BAH27 Ohara 1.701536 41.23944
BAH27 Ohara 1.701536 41.242277
BAFD15 Hoya 1.701999 40.195943
BAH71 Ohara 1.701998 40.097173
BAH54 Ohara 1.695 42.167111
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-ZnSF8(M) Sumita 1.71143 38.9
LAFN10 Sumita 1.72016 42.1
K-ZnSF8 Sumita 1.7143 38.9
ZNSF8 Sumita 1.7143 38.9
LAFN4 Sumita 1.72 43.7
K-BaFn1 Sumita 1.6825 44.5
BAFN1 Sumita 1.6825 44.5
BASF8 Sumita 1.72342 38.0
BASF6 Sumita 1.66755 41.9
BASF12 Sumita 1.66998 39.2
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