BAF1 by Sumita

Obsolete Very Rare Environmentally Dangerous

BAF1 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.31 to 2.00 µm with an nd of 1.5569 and a Vd of 48.5. It has excellent 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: 0.310–2.000 µm
Optical Properties
Refractive Index (nd) 1.5569
Abbe Number (Vd) 48.5
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.38072 - 0.00886285\,\lambda^2 + 0.0141327\,\lambda^{-2} + 0.000778135\,\lambda^{-4} - 6.10401 \times 10^{-5}\,\lambda^{-6} + 4.16523 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 10.8
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) 3.02
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SBF1 Hoya 1.551151 49.517289
KZFN1 Schott 1.551149 49.637723
QF70GFI CDGM 1.547 48.161896
FEL3 Hoya 1.560125 47.090971
BAF2 Hoya 1.56965 49.392725
BAF2 CDGM 1.569703 49.435926
H-BAF2 CDGM 1.5697 49.452646
PBL2 Ohara 1.54072 47.23368
H-QF8 CDGM 1.54072 47.230007
S-TIL2 Ohara 1.54072 47.227127
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
LLF2 Sumita 1.54072 47.2
LLF1 Sumita 1.54814 45.9
LLF4 Sumita 1.56138 45.3
LLF7 Sumita 1.54869 45.4
LLF6 Sumita 1.53172 48.9
BAF3 Sumita 1.58267 46.5
LLF8 Sumita 1.53256 46.0
KF4 Sumita 1.53358 51.6
KF2 Sumita 1.5263 51.0
BALF3 Sumita 1.57135 53.0
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