F2 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) | 1.62004 |
|---|---|
| Abbe Number (Vd) | 36.3 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.55156 - 0.00693995\,\lambda^2 + 0.0252839\,\lambda^{-2} - 5.59507 \times 10^{-5}\,\lambda^{-4} + 0.000119111\,\lambda^{-6} - 3.72344 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 9.6 |
| 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) | 3.6 |
|---|---|
| Relative Cost | — |
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 | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| E-F2 | Hoya | 1.62004 | 36.3 | |
| F2 | Hoya | 1.62004 | 36.303385 | |
| C20-36 | Corning | 1.62001 | 36.30126 | |
| PBM2Y | Ohara | 1.620041 | 36.269263 | |
| S-TIM2 | Ohara | 1.620041 | 36.263378 | |
| PBM2 | Ohara | 1.620041 | 36.256658 | |
| H-F4 | CDGM | 1.62005 | 36.345886 | |
| F4 | CDGM | 1.620047 | 36.35673 | |
| F2HT | Schott | 1.62004 | 36.37 | |
| F2 | Schott | 1.62004 | 36.37 |