F3 by CDGM
Obsolete
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) | 1.616592 |
|---|---|
| Abbe Number (Vd) | 36.627394 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.365 — 1.014 µm |
$$n(\lambda) = \sqrt{2.54428 - 0.00835308\,\lambda^2 + 0.0228232\,\lambda^{-2} + 0.000670215\,\lambda^{-4} + 1.04295 \times 10^{-6}\,\lambda^{-6} + 3.03297 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.5 |
|---|---|
| TCE 100/300°C (10-6/K) | 10.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.64 \times 10^{-7} + 2(1.78 \times 10^{-8})\,\Delta T + 3(-2.72 \times 10^{-11})\,\Delta T^2 + \frac{9.68 \times 10^{-7} + 2(1.31 \times 10^{-9})\,\Delta T}{\lambda - 0.235}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.57 |
|---|---|
| Relative Cost | 2.0 |
Mechanical Properties
| Young's Modulus (GPa) | 56.08 |
|---|---|
| Poisson's Ratio | 0.215 |
| Knoop Hardness (kgf/mm²) | 430.0 |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-F3 | CDGM | 1.61659 | 36.651688 | |
| F4GTI | CDGM | 1.62005 | 36.430327 | |
| F4 | CDGM | 1.620047 | 36.35673 | |
| H-F4 | CDGM | 1.62005 | 36.345886 | |
| F2 | CDGM | 1.612929 | 36.986002 | |
| H-F2 | CDGM | 1.61293 | 37.004441 | |
| F5 | CDGM | 1.624353 | 35.938411 | |
| H-F5 | CDGM | 1.62435 | 35.923444 | |
| H-F6 | CDGM | 1.62495 | 35.585173 | |
| F6 | CDGM | 1.624954 | 35.577816 |