A87-70 by Corning
Standard
Unknown
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) | 1.487248 |
|---|---|
| Abbe Number (Vd) | 70.500557 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.28 — 1.8 µm |
$$n(\lambda) = \sqrt{2.18852 - 0.00959833\,\lambda^2 + 0.00863533\,\lambda^{-2} + 0.000239564\,\lambda^{-4} - 1.54731 \times 10^{-5}\,\lambda^{-6} + 6.87964 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.2 \times 10^{-7} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.43 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| FK5HTi | Schott | 1.48748 | 70.47 | |
| H-QK3L | CDGM | 1.48749 | 70.440487 | |
| H-QK3LGTI | CDGM | 1.48749 | 70.440487 | |
| D-QK3L | CDGM | 1.48749 | 70.440487 | |
| FC5 | Hoya | 1.48749 | 70.44 | |
| N-FK5 | Schott | 1.48749 | 70.41 | |
| D-QK3L-25 | CDGM | 1.48687 | 70.417086 | |
| FK5 | Schott | 1.48749 | 70.405771 | |
| FK5 | Sumita | 1.48749 | 70.4 | |
| K-FK5 | Sumita | 1.48749 | 70.4 |
Similar Glasses (Corning)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| A88-66 | Corning | 1.487502 | 65.807152 | |
| C79-80 | Corning | 1.458467 | 67.795012 | |
| A63-65 | Corning | 1.464501 | 65.763211 | |
| B18-65 | Corning | 1.518199 | 65.115452 | |
| B16-64 | Corning | 1.516804 | 64.224234 | |
| B10-63 | Corning | 1.509992 | 63.551713 | |
| B42-73 | Corning | 1.542198 | 73.473057 | |
| B29-77 | Corning | 1.528554 | 76.961514 | |
| B52-67 | Corning | 1.552198 | 67.059229 | |
| B58-72 | Corning | 1.558086 | 71.998499 |