F6 by CDGM
Obsolete
Rare
Environmentally Dangerous
F6 by CDGM is an obsolete optical glass with a rare melt frequency. It transmits from 0.32 to 2.40 µm with an nd of 1.624954 and a Vd of 35.577816. It has medium thermal expansion (CTE of 9.8×10⁻⁶/K), low relative cost, and dangerous environmental properties.
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) | 1.624954 |
|---|---|
| Abbe Number (Vd) | 35.577816 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.365 — 1.014 µm |
$$n(\lambda) = \sqrt{2.5685 - 0.00836232\,\lambda^2 + 0.0234448\,\lambda^{-2} + 0.000828924\,\lambda^{-4} - 1.18355 \times 10^{-5}\,\lambda^{-6} + 4.09562 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 9.8 |
|---|---|
| TCE 100/300°C (10-6/K) | 12.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.05 \times 10^{-6} + 2(1.51 \times 10^{-8})\,\Delta T + 3(-6.65 \times 10^{-11})\,\Delta T^2 + \frac{1 \times 10^{-6} + 2(9.43 \times 10^{-10})\,\Delta T}{\lambda - 0.24}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Mechanical Properties
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| F7 | Hoya | 1.625363 | 35.583498 | |
| F7 | Schott | 1.625361 | 35.561194 | |
| F1 | Sumita | 1.62588 | 35.6 | |
| C26-36 | Corning | 1.625903 | 35.60701 | |
| S-TIM1 | Ohara | 1.625882 | 35.699614 | |
| F1 | Schott | 1.625882 | 35.700495 | |
| PBM1 | Ohara | 1.625882 | 35.700668 | |
| E-F1 | Hoya | 1.62588 | 35.74 | |
| F1 | Hoya | 1.62588 | 35.744525 | |
| F13 | Schott | 1.622372 | 36.043399 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| H-F6 | CDGM | 1.62495 | 35.585173 | |
| H-F13 | CDGM | 1.62588 | 35.698971 | |
| F13 | CDGM | 1.625884 | 35.713679 | |
| H-F5 | CDGM | 1.62435 | 35.923444 | |
| F5 | CDGM | 1.624353 | 35.938411 | |
| H-F4 | CDGM | 1.62005 | 36.345886 | |
| F4 | CDGM | 1.620047 | 36.35673 | |
| F4GTI | CDGM | 1.62005 | 36.430327 | |
| F3 | CDGM | 1.616592 | 36.627394 | |
| F7 | CDGM | 1.636365 | 35.386204 |