K-PBK40(M) by Sumita
Preferred
Very Common
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) | 1.51497 |
|---|---|
| Abbe Number (Vd) | 63.3 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.26667 - 0.0106972\,\lambda^2 + 0.010455\,\lambda^{-2} + 0.000247319\,\lambda^{-4} - 9.42162 \times 10^{-6}\,\lambda^{-6} + 3.33601 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.3 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.91 \times 10^{-6} + 2(2.06 \times 10^{-8})\,\Delta T + 3(1.52 \times 10^{-11})\,\Delta T^2 + \frac{4.18 \times 10^{-7} + 2(1.61 \times 10^{-10})\,\Delta T}{\lambda - 0.165}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.39 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D-K59-25 | CDGM | 1.51698 | 63.4085 | |
| D-K59 | CDGM | 1.5176 | 63.499991 | |
| S-BSL7R | Ohara | 1.51633 | 63.881689 | |
| H-K90GTI | CDGM | 1.51948 | 63.291634 | |
| H-K5 | CDGM | 1.510072 | 63.364525 | |
| BSC1 | Hoya | 1.510091 | 63.435118 | |
| BK1 | Schott | 1.510091 | 63.464788 | |
| D-K9-25 | CDGM | 1.51577 | 63.989637 | |
| D-K9GT-25 | CDGM | 1.51577 | 63.989637 | |
| BK7G18 | Schott | 1.51975 | 63.58 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| P-BK40 | Sumita | 1.5176 | 63.5 | |
| K-PBK40 | Sumita | 1.5176 | 63.5 | |
| BK1 | Sumita | 1.51009 | 63.4 | |
| K-BK7 | Sumita | 1.51633 | 64.1 | |
| BK7 | Sumita | 1.51633 | 64.1 | |
| K-PBK50(M) | Sumita | 1.52025 | 62.2 | |
| K-PBK50 | Sumita | 1.5225 | 62.3 | |
| K-PBK60(M) | Sumita | 1.52483 | 62.0 | |
| K-PBK60 | Sumita | 1.5274 | 62.3 | |
| K11 | Sumita | 1.50013 | 61.6 |