D-ZPK7-25 by CDGM
Standard
Rare
Precision Molding
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) | 1.56854 |
|---|---|
| Abbe Number (Vd) | 71.235367 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.714113\,\lambda^2}{\lambda^2 - 0.0133604} + \frac{0.713401\,\lambda^2}{\lambda^2 - 0.00289391} + \frac{0.765481\,\lambda^2}{\lambda^2 - 134.125}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 13.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 15.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.47 \times 10^{-5} + 2(-2.21 \times 10^{-9})\,\Delta T + 3(5.2 \times 10^{-12})\,\Delta T^2 + \frac{4.58 \times 10^{-7} + 2(5.69 \times 10^{-10})\,\Delta T}{\lambda - 0.082}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.36 |
|---|---|
| Relative Cost | 18.9 |
Mechanical Properties
| Young's Modulus (GPa) | 66.38 |
|---|---|
| Poisson's Ratio | 0.306 |
| Knoop Hardness (kgf/mm²) | 338.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
anneal rate:25℃/h
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| N-PSK58 | Schott | 1.56907 | 71.205585 | |
| K-GFK70 | Sumita | 1.56907 | 71.3 | |
| GFK70 | Sumita | 1.56907 | 71.3 | |
| K-GFK70(M) | Sumita | 1.56627 | 71.3 | |
| FCD615 | Hoya | 1.57144 | 71.61 | |
| B58-72 | Corning | 1.558086 | 71.998499 | |
| FCD500 | Hoya | 1.55397 | 71.76 | |
| MP-FCD500-20 | Hoya | 1.55352 | 71.72 | |
| MC-FCD500-20 | Hoya | 1.55352 | 71.72 | |
| M-FCD500 | Hoya | 1.55332 | 71.69 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D-ZPK7 | CDGM | 1.56907 | 71.304254 | |
| H-ZPK7 | CDGM | 1.56907 | 71.304254 | |
| D-ZPK5-25 | CDGM | 1.59216 | 68.281511 | |
| H-ZPK5 | CDGM | 1.5928 | 68.342024 | |
| D-ZPK5 | CDGM | 1.5928 | 68.342024 | |
| H-FK55 | CDGM | 1.5502 | 75.224681 | |
| H-ZPK3 | CDGM | 1.59349 | 67.285372 | |
| D-ZPK3-25 | CDGM | 1.59327 | 67.22642 | |
| D-ZPK3 | CDGM | 1.59419 | 67.295385 | |
| D-PK3 | CDGM | 1.525 | 70.370578 |