BASF4 by Sumita

Obsolete Very Rare Environmentally Dangerous
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: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.65128
Abbe Number (Vd) 38.3
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.66192 - 0.0112377\,\lambda^2 + 0.0186692\,\lambda^{-2} + 0.00227668\,\lambda^{-4} - 0.000228232\,\lambda^{-6} + 1.48979 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 10.0
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) 3.91
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 2
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
BAFD4 Hoya 1.651278 38.312578
ATF2 Hoya 1.65052 38.036939
BASF10 Schott 1.65016 39.148818
C51-39 Corning 1.650206 39.193419
BAFD10 Hoya 1.650157 39.343065
BAH30 Ohara 1.650158 39.390461
NBFD38 Hoya 1.65253 39.48
H-TF5 CDGM 1.6541 39.539424
E-ADF50 Hoya 1.65412 39.62
ADF50 Hoya 1.654118 39.624202
Similar Glasses (Sumita)
Glass Manufacturer nd Vd
K-BaSF4 Sumita 1.65128 38.3
BASF10 Sumita 1.65016 39.3
K-PG395(M) Sumita 1.65296 36.8
K-PG395 Sumita 1.658 36.9
BASF12 Sumita 1.66998 39.2
BASF2 Sumita 1.66446 35.9
BASF1 Sumita 1.62606 39.1
F6 Sumita 1.63636 35.4
SF7 Sumita 1.6398 34.6
K-PSFn166(M) Sumita 1.65858 34.4
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