KF5 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) | 1.5231 |
|---|---|
| Abbe Number (Vd) | 50.9 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.28055 - 0.00820263\,\lambda^2 + 0.0138094\,\lambda^{-2} + 0.000239951\,\lambda^{-4} + 2.03382 \times 10^{-6}\,\lambda^{-6} + 7.99063 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 8.4 |
| 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) | 2.72 |
|---|---|
| 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 | |
|---|---|---|---|---|
| CF5 | Hoya | 1.5231 | 50.951831 | |
| CF2 | Hoya | 1.526296 | 51.046045 | |
| KF9 | Schott | 1.523412 | 51.492996 | |
| N-KF9 | Schott | 1.52346 | 51.54 | |
| KZFN2 | Schott | 1.52944 | 51.626811 | |
| SBF2 | Hoya | 1.52944 | 51.643052 | |
| SSL2 | Ohara | 1.529441 | 51.722557 | |
| B29-52 | Corning | 1.528998 | 51.838713 | |
| ADP | Generic Birefringent | 1.523454 | 52.25678 | |
| H-KF6 | CDGM | 1.51742 | 52.149249 |