S-NPH4 by Ohara
Standard
Medium
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) | 1.89286 |
|---|---|
| Abbe Number (Vd) | 20.36181 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.404656 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.93564\,\lambda^2}{\lambda^2 - 0.0152585} + \frac{0.449596\,\lambda^2}{\lambda^2 - 0.0696816} + \frac{2.71829\,\lambda^2}{\lambda^2 - 170.327}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.3 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.24 \times 10^{-6} + 2(9.66 \times 10^{-9})\,\Delta T + 3(-1.5 \times 10^{-11})\,\Delta T^2 + \frac{1.05 \times 10^{-6} + 2(1.53 \times 10^{-9})\,\Delta T}{\lambda - 0.321}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.61 |
|---|---|
| Relative Cost | 4.8 |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Notes
Recommended
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-PSFn1(M) | Sumita | 1.89945 | 21.3 | |
| K-PSFn190(M) | Sumita | 1.89816 | 21.7 | |
| K-PSFn190 | Sumita | 1.9046 | 21.5 | |
| K-PSFn1 | Sumita | 1.9068 | 21.2 | |
| P-SF67 | Schott | 1.9068 | 21.4 | |
| FDS20-W | Hoya | 1.86966 | 20.02 | |
| SF58 | Schott | 1.917613 | 21.51112 | |
| K-PSFn5(M) | Sumita | 1.91643 | 22.4 | |
| REALVIEW_1.9_LIGHTWEIGHT | Schott | 1.922002 | 21.44 | |
| H-ZF62GT | CDGM | 1.92286 | 20.879915 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| PBH72 | Ohara | 1.915356 | 21.171926 | |
| PBH21 | Ohara | 1.922861 | 20.884172 | |
| PBH71 | Ohara | 1.922864 | 21.288699 | |
| S-NPH2 | Ohara | 1.92286 | 18.896912 | |
| L-NBH54 | Ohara | 1.902 | 25.101413 | |
| S-NPH5 | Ohara | 1.858955 | 22.728736 | |
| S-NBH56 | Ohara | 1.854779 | 24.79898 | |
| PBH55 | Ohara | 1.84986 | 24.054274 | |
| L-TIH53 | Ohara | 1.84666 | 23.773536 | |
| S-TIH53W | Ohara | 1.84666 | 23.77794 |