H-FK71 by CDGM
Preferred
Very Common
Environmentally Friendly
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) | 1.4565 |
|---|---|
| Abbe Number (Vd) | 90.273821 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.222267\,\lambda^2}{\lambda^2 - 0.0140651} + \frac{0.880444\,\lambda^2}{\lambda^2 - 0.00420457} + \frac{0.797849\,\lambda^2}{\lambda^2 - 171.03}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 13.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 16.7 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.16 \times 10^{-5} + 2(-5.35 \times 10^{-9})\,\Delta T + 3(-8.74 \times 10^{-12})\,\Delta T^2 + \frac{3.15 \times 10^{-7} + 2(2.57 \times 10^{-10})\,\Delta T}{\lambda - 0.172}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.63 |
|---|---|
| Relative Cost | 12.4 |
Mechanical Properties
| Young's Modulus (GPa) | 69.6 |
|---|---|
| Poisson's Ratio | 0.301 |
| Knoop Hardness (kgf/mm²) | 344.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| FCD10 | Hoya | 1.4565 | 90.27 | |
| S-FPL52 | Ohara | 1.455999 | 90.288026 | |
| FPL52 | Ohara | 1.455999 | 90.31888 | |
| FCD10A | Hoya | 1.4586 | 90.19 | |
| K-PFK90 | Sumita | 1.4588 | 90.0 | |
| K-PFK90(M) | Sumita | 1.45733 | 89.8 | |
| N-FK58 | Schott | 1.456 | 90.9 | |
| FK54 | Schott | 1.437 | 90.702365 | |
| SRF2 | Generic IR | 1.437925 | 91.593259 | |
| LIYF4-E | Generic Birefringent | 1.476472 | 88.935059 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-FK71A | CDGM | 1.456498 | 90.470884 | |
| D-FK95-25 | CDGM | 1.43744 | 94.438841 | |
| D-FK95 | CDGM | 1.4378 | 94.523389 | |
| H-FK95N | CDGM | 1.4378 | 94.523389 | |
| H-FK61GTI | CDGM | 1.497 | 81.612838 | |
| H-FK61 | CDGM | 1.497 | 81.612838 | |
| D-FK61 | CDGM | 1.497 | 81.611615 | |
| H-FK61B | CDGM | 1.497 | 81.605419 | |
| D-FK61A | CDGM | 1.497 | 81.605419 | |
| D-FK61A-25 | CDGM | 1.49665 | 81.549116 |