BAF4 by Sumita

Obsolete Very Rare Environmentally Dangerous

BAF4 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.33 to 2.00 µm with an nd of 1.60562 and a Vd of 43.9. 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: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.60562
Abbe Number (Vd) 43.9
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.52586 - 0.0108701\,\lambda^2 + 0.0165428\,\lambda^{-2} + 0.00115699\,\lambda^{-4} - 8.85624 \times 10^{-5}\,\lambda^{-6} + 6.10337 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 10.5
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) 3.3
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
BAF5 CDGM 1.605623 43.890292
BAF4 Hoya 1.60562 43.87626
H-BAF5 CDGM 1.60562 43.875621
BAF4 Schott 1.605621 43.929699
C06-44 Corning 1.605608 43.942859
M-BAF41 Hoya 1.605777 43.98709
BAM4 Ohara 1.60562 43.723021
N-BAF4 Schott 1.60568 43.72
S-BAM4 Ohara 1.60562 43.706978
TF3 CDGM 1.612423 44.093486
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
KZFS4 Sumita 1.6134 43.8
BASF5 Sumita 1.60323 42.5
K-BaSF5 Sumita 1.60323 42.5
K-LCV161(M) Sumita 1.61477 45.6
K-LCV161 Sumita 1.6182 45.3
LF2 Sumita 1.58921 41.0
BASF3 Sumita 1.60717 40.2
LF3 Sumita 1.58215 42.0
K-BaF8 Sumita 1.62374 47.1
BAF8 Sumita 1.62374 47.1
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