NBFD1 by Hoya
Obsolete
Unknown
Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
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 | |
|---|---|---|---|---|
| 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 | |
|---|---|---|---|---|
| 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 |