NBFD1 by Hoya

Obsolete Unknown Environmentally Dangerous

NBFD1 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.789004 and a Vd of 42.757634. It has dangerous environmental properties.

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.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.789004
Abbe Number (Vd) 42.757634
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{3.11638 - 0.0132426\,\lambda^2 + 0.0286485\,\lambda^{-2} + 0.000682353\,\lambda^{-4} - 7.25224 \times 10^{-6}\,\lambda^{-6} + 2.7433 \times 10^{-6}\,\lambda^{-8}}$$
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 Compare
D96-43 Corning 1.796195 43.217783
K-LaSFn4 Sumita 1.785 43.7
LASFN4 Sumita 1.785 43.7
K-VC179(M) Sumita 1.79441 41.9
LAFN10 Schott 1.784432 43.950523
N-LAF33 Schott 1.78582 44.05
N-LAF36 Schott 1.79952 42.37
LAH51 Ohara 1.785896 44.186159
H-LAF52 CDGM 1.7859 44.187159
LASFN3 Sumita 1.7995 42.3
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
NBFD11 Hoya 1.7859 43.94
NBFD12 Hoya 1.7995 42.34
NBFD2 Hoya 1.797199 41.143795
NBFD14 Hoya 1.801699 44.321602
TAF2 Hoya 1.7945 45.39
M-NBFD13 Hoya 1.8061 40.740652
MC-NBFD130 Hoya 1.8061 40.73
M-NBFD130 Hoya 1.8061 40.73
MC-NBFD130L Hoya 1.8061 40.73
MP-NBFD130 Hoya 1.8061 40.73
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