KF6 by Schott
Obsolete
Unknown
Environmentally Dangerous
KF6 by Schott is an obsolete optical glass. It transmits from 0.33 to 2.23 µm with an nd of 1.517421 and a Vd of 52.200088. It has medium thermal expansion (CTE of 6.9×10⁻⁶/K) 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) | 1.517421 |
|---|---|
| Abbe Number (Vd) | 52.200088 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.17007\,\lambda^2}{\lambda^2 - 0.00814992} + \frac{0.095051\,\lambda^2}{\lambda^2 - 0.0388217} + \frac{0.907409\,\lambda^2}{\lambda^2 - 108.882}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.9 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.25 \times 10^{-6} + 2(1.75 \times 10^{-8})\,\Delta T + 3(-6.23 \times 10^{-11})\,\Delta T^2 + \frac{6 \times 10^{-7} + 2(8.44 \times 10^{-10})\,\Delta T}{\lambda - 0.195}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
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Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| KF6 | Sumita | 1.51742 | 52.2 | |
| CF6 | Hoya | 1.517419 | 52.154512 | |
| E-CF6 | Hoya | 1.51742 | 52.15 | |
| H-KF6 | CDGM | 1.51742 | 52.149249 | |
| NSL36 | Ohara | 1.517417 | 52.412251 | |
| S-NSL36 | Ohara | 1.517417 | 52.430903 | |
| SSL5 | Ohara | 1.521299 | 52.553447 | |
| K-SKF6 | Sumita | 1.512 | 52.1 | |
| SBF5 | Hoya | 1.521299 | 52.780677 | |
| ADP | Generic Birefringent | 1.523454 | 52.25678 |
Similar Glasses (Schott)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| N-KF9 | Schott | 1.52346 | 51.54 | |
| KF9 | Schott | 1.523412 | 51.492996 | |
| KZFN2 | Schott | 1.52944 | 51.626811 | |
| D263TECO | Schott | 1.523303 | 54.5172 | |
| KF3 | Schott | 1.51454 | 54.702547 | |
| LLF6HT | Schott | 1.531739 | 48.974492 | |
| N-LLF6 | Schott | 1.531688 | 48.895238 | |
| LLF6 | Schott | 1.531719 | 48.762595 | |
| BALF5 | Schott | 1.547391 | 53.629486 | |
| N-BALF5 | Schott | 1.54739 | 53.63 |