K-PBK50 by Sumita
Standard
Medium
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) | 1.5225 |
|---|---|
| Abbe Number (Vd) | 62.3 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.28795 - 0.0105138\,\lambda^2 + 0.0109632\,\lambda^{-2} + 0.000270271\,\lambda^{-4} - 1.70545 \times 10^{-5}\,\lambda^{-6} + 1.0857 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.1 \times 10^{-8} + 2(2.09 \times 10^{-8})\,\Delta T + 3(-1.11 \times 10^{-11})\,\Delta T^2 + \frac{4.38 \times 10^{-7} + 2(5.79 \times 10^{-10})\,\Delta T}{\lambda - 0.176}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
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 | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| B19-61 | Corning | 1.519061 | 61.386004 | |
| H-K90GTI | CDGM | 1.51948 | 63.291634 | |
| BK6 | Schott | 1.531129 | 62.150728 | |
| BSC6 | Hoya | 1.531128 | 62.075664 | |
| BK7G18 | Schott | 1.51975 | 63.58 | |
| D-K59-25 | CDGM | 1.51698 | 63.4085 | |
| D-K59 | CDGM | 1.5176 | 63.499991 | |
| BK8 | Schott | 1.520152 | 63.685744 | |
| AF32ECO | Schott | 1.511531 | 62.574031 | |
| S-BSL7R | Ohara | 1.51633 | 63.881689 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-PBK50(M) | Sumita | 1.52025 | 62.2 | |
| K-PBK60(M) | Sumita | 1.52483 | 62.0 | |
| K-PBK60 | Sumita | 1.5274 | 62.3 | |
| K-PBK40 | Sumita | 1.5176 | 63.5 | |
| P-BK40 | Sumita | 1.5176 | 63.5 | |
| K-PBK40(M) | Sumita | 1.51497 | 63.3 | |
| K-BK7 | Sumita | 1.51633 | 64.1 | |
| BK7 | Sumita | 1.51633 | 64.1 | |
| BK1 | Sumita | 1.51009 | 63.4 | |
| BALK3 | Sumita | 1.51835 | 60.3 |