NBFD5 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) | 1.762001 |
|---|---|
| Abbe Number (Vd) | 40.263213 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{3.02177 - 0.0116417\,\lambda^2 + 0.0267138\,\lambda^{-2} + 0.00127669\,\lambda^{-4} - 6.7665 \times 10^{-5}\,\lambda^{-6} + 6.40368 \times 10^{-6}\,\lambda^{-8}}$$
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 | |
|---|---|---|---|---|
| H-LAF55 | CDGM | 1.762 | 40.105472 | |
| LAM55 | Ohara | 1.762001 | 40.100947 | |
| S-LAM55 | Ohara | 1.762001 | 40.100176 | |
| LAFN9 | Sumita | 1.764 | 40.3 | |
| H-LAFL5 | CDGM | 1.75367 | 37.491665 | |
| LAF13 | Schott | 1.775507 | 37.836043 | |
| K-GIR140 | Sumita | 1.75106 | 43.1 | |
| LAFN8 | Schott | 1.735197 | 41.590899 | |
| LAF22A | Schott | 1.781791 | 37.196288 | |
| H-LAF7 | CDGM | 1.78179 | 37.092107 |