NBFD8 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) | 1.807401 |
|---|---|
| Abbe Number (Vd) | 35.542096 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{3.17672 - 0.019185\,\lambda^2 + 0.0248251\,\lambda^{-2} + 0.0038402\,\lambda^{-4} - 0.000382458\,\lambda^{-6} + 2.51346 \times 10^{-5}\,\lambda^{-8}}$$
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 | |
|---|---|---|---|---|
| N-LASF45 | Schott | 1.80107 | 34.97 | |
| N-LASF45HT | Schott | 1.80107 | 34.97 | |
| S-LAM66 | Ohara | 1.800999 | 34.967403 | |
| H-ZLAF66 | CDGM | 1.801 | 34.966919 | |
| H-ZLAF66GT | CDGM | 1.801 | 34.966919 | |
| LAM66 | Ohara | 1.800999 | 34.965762 | |
| LASF33 | Schott | 1.805958 | 34.242133 | |
| LASF36A | Schott | 1.797117 | 35.080117 | |
| H-ZLAF56B | CDGM | 1.8061 | 33.268324 | |
| S-LAM73 | Ohara | 1.7936 | 37.08945 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| M-NBFD82 | Hoya | 1.814741 | 37.027807 | |
| NBFD15-W | Hoya | 1.8061 | 33.27 | |
| NBFD15 | Hoya | 1.8061 | 33.27 | |
| NBFD40 | Hoya | 1.829 | 36.496616 | |
| NBFD7 | Hoya | 1.782999 | 36.06621 | |
| NBFD10 | Hoya | 1.834 | 37.34 | |
| M-NBFD10 | Hoya | 1.83441 | 37.29 | |
| MP-NBFD10-20 | Hoya | 1.83461 | 37.29 | |
| NBFD3 | Hoya | 1.8045 | 39.64 | |
| MC-NBFD130 | Hoya | 1.8061 | 40.73 |