C7 by Hoya
Obsolete
Unknown
Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
Optical Properties
| Refractive Index (nd) | 1.511122 |
|---|---|
| Abbe Number (Vd) | 60.485929 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{2.25136 - 0.00794946\,\lambda^2 + 0.0116168\,\lambda^{-2} + 0.0001515\,\lambda^{-4} - 3.15249 \times 10^{-6}\,\lambda^{-6} + 4.84127 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | — |
|---|---|
| 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 | |
|---|---|---|---|---|
| NSL7 | Ohara | 1.511121 | 60.485793 | |
| H-K6 | CDGM | 1.511125 | 60.478905 | |
| K7 | Sumita | 1.51112 | 60.5 | |
| K7HT | Schott | 1.511144 | 60.466081 | |
| K7 | Schott | 1.51112 | 60.41 | |
| B11-60 | Corning | 1.510999 | 60.383147 | |
| H-K7 | CDGM | 1.51478 | 60.634896 | |
| N-ZK7A | Schott | 1.508054 | 61.04 | |
| K4A | CDGM | 1.50802 | 61.052897 | |
| ZKN7 | Schott | 1.508469 | 61.187789 |