F1 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) | 1.62588 |
|---|---|
| Abbe Number (Vd) | 35.6 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.57128 - 0.00856333\,\lambda^2 + 0.0237824\,\lambda^{-2} + 0.000700397\,\lambda^{-4} + 7.98682 \times 10^{-6}\,\lambda^{-6} + 2.98471 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 10.2 |
| 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) | 3.65 |
|---|---|
| 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 | |
|---|---|---|---|---|
| C26-36 | Corning | 1.625903 | 35.60701 | |
| F7 | Hoya | 1.625363 | 35.583498 | |
| F7 | Schott | 1.625361 | 35.561194 | |
| H-F13 | CDGM | 1.62588 | 35.698971 | |
| S-TIM1 | Ohara | 1.625882 | 35.699614 | |
| F1 | Schott | 1.625882 | 35.700495 | |
| PBM1 | Ohara | 1.625882 | 35.700668 | |
| F13 | CDGM | 1.625884 | 35.713679 | |
| H-F6 | CDGM | 1.62495 | 35.585173 | |
| F6 | CDGM | 1.624954 | 35.577816 |