NBF1 by Hoya
Standard
Rare
Environmentally Dangerous
NBF1 by Hoya is a standard optical glass with a rare melt frequency. It transmits from 0.30 to 1.55 µm with an nd of 1.7433 and a Vd of 49.22. It has low thermal expansion (CTE of 5.3×10⁻⁶/K), average chemical resistance, and dangerous environmental properties.
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 6.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.08987 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 4 |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
General glass Type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| H-LAF53 | CDGM | 1.7433 | 49.221808 | |
| LAFN5 | Sumita | 1.743 | 49.2 | |
| K-LaFn5 | Sumita | 1.743 | 49.2 | |
| L-LAM60 | Ohara | 1.743198 | 49.295578 | |
| LAM60 | Ohara | 1.743198 | 49.309053 | |
| D-LAF53 | CDGM | 1.7433 | 49.325949 | |
| S-LAM60 | Ohara | 1.743198 | 49.339444 | |
| D-LAF53-25 | CDGM | 1.7421 | 49.246024 | |
| N-LAF35 | Schott | 1.7433 | 49.4 | |
| LAFN7 | Sumita | 1.735 | 49.5 |