BK6 by Schott
Obsolete
Unknown
Environmentally Dangerous
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) | 1.531129 |
|---|---|
| Abbe Number (Vd) | 62.150728 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.00282\,\lambda^2}{\lambda^2 - 0.00574716} + \frac{0.309568\,\lambda^2}{\lambda^2 - 0.0192046} + \frac{1.01841\,\lambda^2}{\lambda^2 - 108.761}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.8 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.4 \times 10^{-7} + 2(1.09 \times 10^{-8})\,\Delta T + 3(-2.42 \times 10^{-11})\,\Delta T^2 + \frac{4.94 \times 10^{-7} + 2(5 \times 10^{-10})\,\Delta T}{\lambda - 0.167}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.69 |
|---|---|
| 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 | — |
Notes
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Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BSC6 | Hoya | 1.531128 | 62.075664 | |
| K-PBK60 | Sumita | 1.5274 | 62.3 | |
| K-PBK60(M) | Sumita | 1.52483 | 62.0 | |
| K-PBK50 | Sumita | 1.5225 | 62.3 | |
| K-PG375(M) | Sumita | 1.53922 | 62.7 | |
| K-PBK50(M) | Sumita | 1.52025 | 62.2 | |
| H-BAK1 | CDGM | 1.53028 | 60.466139 | |
| K-PG375 | Sumita | 1.5425 | 62.9 | |
| B19-61 | Corning | 1.519061 | 61.386004 | |
| H-K90GTI | CDGM | 1.51948 | 63.291634 |
Similar Glasses (Schott)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BK7G18 | Schott | 1.51975 | 63.58 | |
| UK50 | Schott | 1.522571 | 60.383109 | |
| BK8 | Schott | 1.520152 | 63.685744 | |
| K50 | Schott | 1.522572 | 60.179756 | |
| BALKN3 | Schott | 1.518489 | 60.259571 | |
| PK3 | Schott | 1.525419 | 64.662422 | |
| AF32ECO | Schott | 1.511531 | 62.574031 | |
| N-BAK2 | Schott | 1.53996 | 59.71 | |
| BAK2 | Schott | 1.53996 | 59.708588 | |
| P-BK7 | Schott | 1.5164 | 64.06 |