NBFD3 by Hoya
Special
Very Rare
Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.8045 |
|---|---|
| Abbe Number (Vd) | 39.64 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.16337 - 0.0132763\,\lambda^2 + 0.0311333\,\lambda^{-2} + 0.000835234\,\lambda^{-4} + 2.99805 \times 10^{-6}\,\lambda^{-6} + 2.55689 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.16184 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.39 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | 3 |
| Acid Resistance | 5 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Not in a position to accept new order because of discontinuation.
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZLAF51 | CDGM | 1.8045 | 39.635248 | |
| S-LAH63 | Ohara | 1.804398 | 39.58615 | |
| LAH63 | Ohara | 1.804398 | 39.581254 | |
| S-LAH63Q | Ohara | 1.8044 | 39.580489 | |
| LASFN2 | Sumita | 1.805 | 39.6 | |
| K-LaSFn2 | Sumita | 1.805 | 39.6 | |
| L-LAH81 | Ohara | 1.8061 | 40.400738 | |
| P-LASF50 | Schott | 1.8086 | 40.46 | |
| N-LASF43 | Schott | 1.8061 | 40.61 | |
| L-LAH84 | Ohara | 1.80835 | 40.548503 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| M-NBFD130 | Hoya | 1.8061 | 40.73 | |
| MC-NBFD130L | Hoya | 1.8061 | 40.73 | |
| MC-NBFD130 | Hoya | 1.8061 | 40.73 | |
| NBFD13 | Hoya | 1.8061 | 40.73 | |
| MP-NBFD130 | Hoya | 1.8061 | 40.73 | |
| M-NBFD13 | Hoya | 1.8061 | 40.740652 | |
| MC-NBFD135 | Hoya | 1.80834 | 40.92 | |
| NBFD2 | Hoya | 1.797199 | 41.143795 | |
| NBFD12 | Hoya | 1.7995 | 42.34 | |
| M-NBFD82 | Hoya | 1.814741 | 37.027807 |