H-K6 by CDGM
Standard
Rare
Environmentally Friendly
H-K6 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.29 to 2.40 µm with an nd of 1.511125 and a Vd of 60.478905. It has medium thermal expansion (CTE of 8.5×10⁻⁶/K), good chemical resistance, and moderate relative cost.
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) | 1.511125 |
|---|---|
| Abbe Number (Vd) | 60.478905 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.365 — 1.014 µm |
$$n(\lambda) = \sqrt{2.25025 - 0.00758715\,\lambda^2 + 0.0126304\,\lambda^{-2} - 0.000229002\,\lambda^{-4} + 5.80226 \times 10^{-5}\,\lambda^{-6} - 2.84095 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.5 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.9 |
| Thermal Conductivity (W/mK) | 0.843 |
| Heat Capacity (J/gK) | 0.727 |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.84 \times 10^{-6} + 2(1.68 \times 10^{-8})\,\Delta T + 3(-6.96 \times 10^{-11})\,\Delta T^2 + \frac{4.72 \times 10^{-7} + 2(-6.38 \times 10^{-11})\,\Delta T}{\lambda - 0.217}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Mechanical Properties
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| NSL7 | Ohara | 1.511121 | 60.485793 | |
| C7 | Hoya | 1.511122 | 60.485929 | |
| K7HT | Schott | 1.511144 | 60.466081 | |
| K7 | Sumita | 1.51112 | 60.5 | |
| K7 | Schott | 1.51112 | 60.41 | |
| B11-60 | Corning | 1.510999 | 60.383147 | |
| N-ZK7A | Schott | 1.508054 | 61.04 | |
| ZKN7 | Schott | 1.508469 | 61.187789 | |
| N-ZK7 | Schott | 1.50847 | 61.19 | |
| ZNC7 | Hoya | 1.508471 | 61.266087 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| H-K7 | CDGM | 1.51478 | 60.634896 | |
| K4A | CDGM | 1.50802 | 61.052897 | |
| H-K10 | CDGM | 1.51818 | 58.949331 | |
| H-K50 | CDGM | 1.52249 | 59.480754 | |
| H-K11 | CDGM | 1.52638 | 60.15737 | |
| H-K1 | CDGM | 1.49967 | 62.071979 | |
| H-K51 | CDGM | 1.52307 | 58.639792 | |
| H-BAK1 | CDGM | 1.53028 | 60.466139 | |
| H-K5 | CDGM | 1.510072 | 63.364525 | |
| H-K90GTI | CDGM | 1.51948 | 63.291634 |