F9 by Sumita
Obsolete
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) | 1.62045 |
|---|---|
| Abbe Number (Vd) | 38.0 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.55985 - 0.00956257\,\lambda^2 + 0.0218134\,\lambda^{-2} + 0.000722991\,\lambda^{-4} - 7.71978 \times 10^{-6}\,\lambda^{-6} + 3.40222 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 9.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.56 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 2 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| F9 | Schott | 1.620451 | 38.080601 | |
| F9 | Hoya | 1.620446 | 38.090002 | |
| PBM9 | Ohara | 1.620451 | 38.119955 | |
| BASF1 | Schott | 1.626061 | 38.962861 | |
| H-BAF8 | CDGM | 1.62604 | 39.071631 | |
| BAFD1 | Hoya | 1.626057 | 39.085725 | |
| F3 | Schott | 1.612931 | 37.038954 | |
| S-TIM3 | Ohara | 1.612929 | 37.005342 | |
| H-F2 | CDGM | 1.61293 | 37.004441 | |
| PBM3 | Ohara | 1.612929 | 36.994096 |