BAF8 by Hoya

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.25–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.25–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–1.550 µm
Optical Properties
Refractive Index (nd) 1.623739
Abbe Number (Vd) 47.054197
Dispersion Formula Schott
Wavelength Range 0.25 — 1.55 µm
$$n(\lambda) = \sqrt{2.57804 - 0.00682047\,\lambda^2 + 0.0210721\,\lambda^{-2} - 0.000254198\,\lambda^{-4} + 8.82308 \times 10^{-5}\,\lambda^{-6} - 2.90313 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.3
TCE 100/300°C (10-6/K) 79.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.93964 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.66
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 2
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
BAM8 Ohara 1.62374 47.09722
BAF8 Sumita 1.62374 47.1
K-BaF8 Sumita 1.62374 47.1
BAF8 Schott 1.62374 47.000909
C24-47 Corning 1.624 46.940278
K-LCV161(M) Sumita 1.61477 45.6
K-LCV161 Sumita 1.6182 45.3
N-BAF52 Schott 1.60863 46.6
BAF52 Schott 1.608589 46.44241
H-BAF6 CDGM 1.60801 46.202418
Similar Glasses (Hoya)
Glass Manufacturer nd Vd
E-BAF8 Hoya 1.62374 47.05
BAF7 Hoya 1.608013 46.212035
ADF4 Hoya 1.612498 44.873885
BAF9 Hoya 1.643278 47.941673
BACED9 Hoya 1.620119 49.823001
BAF12 Hoya 1.639302 45.070071
ADF10 Hoya 1.613102 44.361138
E-ADF10 Hoya 1.6131 44.36
LAF45 Hoya 1.61396 44.29
ADF40 Hoya 1.6134 44.290061
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