L-NBH54 by Ohara
Obsolete
Unknown
Precision Molding
Environmentally Friendly
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) | 1.902 |
|---|---|
| Abbe Number (Vd) | 25.101413 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.37 — 2.4 µm |
$$n(\lambda) = \sqrt{1 + \frac{2.00723\,\lambda^2}{\lambda^2 - 0.0135705} + \frac{0.442087\,\lambda^2}{\lambda^2 - 0.0591809} + \frac{3.37287\,\lambda^2}{\lambda^2 - 219.833}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.1 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.9 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.5 \times 10^{-7} + 2(6.74 \times 10^{-9})\,\Delta T + 3(-1.38 \times 10^{-11})\,\Delta T^2 + \frac{1.01 \times 10^{-6} + 2(1.37 \times 10^{-9})\,\Delta T}{\lambda - 0.298}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.64 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 4 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 2 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Notes
Low Softening Temperature
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| NBFD27 | Hoya | 1.9011 | 27.06 | |
| FDS24 | Hoya | 1.92119 | 23.96 | |
| FDS24-SW | Hoya | 1.92119 | 23.96 | |
| FDS24-W | Hoya | 1.92119 | 23.96 | |
| K-PSFn5(M) | Sumita | 1.91643 | 22.4 | |
| K-PSFn190(M) | Sumita | 1.89816 | 21.7 | |
| K-PSFn190 | Sumita | 1.9046 | 21.5 | |
| SRMOO4-E | Generic Birefringent | 1.913456 | 28.381356 | |
| K-PSFn5 | Sumita | 1.9211 | 22.4 | |
| P-SF67 | Schott | 1.9068 | 21.4 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| PBH72 | Ohara | 1.915356 | 21.171926 | |
| PBH71 | Ohara | 1.922864 | 21.288699 | |
| S-NPH4 | Ohara | 1.89286 | 20.36181 | |
| PBH21 | Ohara | 1.922861 | 20.884172 | |
| LAH80 | Ohara | 1.885 | 30.163795 | |
| L-LAH86 | Ohara | 1.902699 | 31.00532 | |
| S-LAH95 | Ohara | 1.903659 | 31.343065 | |
| S-NPH5 | Ohara | 1.858955 | 22.728736 | |
| S-NBH56 | Ohara | 1.854779 | 24.79898 | |
| LAH78 | Ohara | 1.901355 | 31.550244 |