NBFD2 by Hoya

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Optical Properties
Refractive Index (nd) 1.797199
Abbe Number (Vd) 41.143795
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{3.14214 - 0.013576\,\lambda^2 + 0.0295098\,\lambda^{-2} + 0.000817701\,\lambda^{-4} - 7.72504 \times 10^{-7}\,\lambda^{-6} + 2.13223 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
K-VC179 Sumita 1.7989 41.8
K-VC179(M) Sumita 1.79441 41.9
S-LAH52 Ohara 1.799516 42.225007
S-LAH52Q Ohara 1.79952 42.239506
LAH52 Ohara 1.799516 42.241337
H-LAF54 CDGM 1.799519 42.253294
K-LaSFn3 Sumita 1.7995 42.3
LASFN3 Sumita 1.7995 42.3
K-VC89(M) Sumita 1.8059 40.9
K-VC181(M) Sumita 1.80614 41.1
Similar Glasses (Hoya)
Glass Manufacturer nd Vd
NBFD12 Hoya 1.7995 42.34
M-NBFD13 Hoya 1.8061 40.740652
NBFD13 Hoya 1.8061 40.73
MC-NBFD130L Hoya 1.8061 40.73
MC-NBFD130 Hoya 1.8061 40.73
MP-NBFD130 Hoya 1.8061 40.73
M-NBFD130 Hoya 1.8061 40.73
MC-NBFD135 Hoya 1.80834 40.92
NBFD3 Hoya 1.8045 39.64
NBFD1 Hoya 1.789004 42.757634
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