H-FK55 by CDGM
Preferred
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) | 1.5502 |
|---|---|
| Abbe Number (Vd) | 75.224681 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.534932\,\lambda^2}{\lambda^2 - 0.00128059} + \frac{0.83905\,\lambda^2}{\lambda^2 - 0.0116445} + \frac{0.886512\,\lambda^2}{\lambda^2 - 143.252}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 11.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 14.3 |
| Thermal Conductivity (W/mK) | 0.536 |
| Heat Capacity (J/gK) | 0.472 |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.79 \times 10^{-5} + 2(5.97 \times 10^{-9})\,\Delta T + 3(-4.11 \times 10^{-11})\,\Delta T^2 + \frac{3.16 \times 10^{-7} + 2(2.18 \times 10^{-10})\,\Delta T}{\lambda - 0.217}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.11 |
|---|---|
| Relative Cost | 15.1 |
Mechanical Properties
| Young's Modulus (GPa) | 76.83 |
|---|---|
| Poisson's Ratio | 0.297 |
| Knoop Hardness (kgf/mm²) | 405.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| FCD705 | Hoya | 1.55032 | 75.5 | |
| ULTRAN30 | Schott | 1.5483 | 74.244488 | |
| S-FPM3 | Ohara | 1.53775 | 74.703119 | |
| B42-73 | Corning | 1.542198 | 73.473057 | |
| S-FPM4 | Ohara | 1.52841 | 76.452824 | |
| K-PSK500 | Sumita | 1.55215 | 72.0 | |
| K-PSK500(M) | Sumita | 1.55 | 71.9 | |
| B58-72 | Corning | 1.558086 | 71.998499 | |
| B29-77 | Corning | 1.528554 | 76.961514 | |
| PK51A | Schott | 1.528554 | 76.975515 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZPK7 | CDGM | 1.56907 | 71.304254 | |
| D-ZPK7 | CDGM | 1.56907 | 71.304254 | |
| D-ZPK7-25 | CDGM | 1.56854 | 71.235367 | |
| D-PK3 | CDGM | 1.525 | 70.370578 | |
| D-PK3-25 | CDGM | 1.52368 | 70.274839 | |
| D-ZPK5-25 | CDGM | 1.59216 | 68.281511 | |
| H-ZPK5 | CDGM | 1.5928 | 68.342024 | |
| D-ZPK5 | CDGM | 1.5928 | 68.342024 | |
| D-FK61A-25 | CDGM | 1.49665 | 81.549116 | |
| D-FK61-25 | CDGM | 1.49653 | 81.531772 |