B72-57 by Corning
Standard
Unknown
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) | 1.572498 |
|---|---|
| Abbe Number (Vd) | 57.494511 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.29 — 1.8 µm |
$$n(\lambda) = \sqrt{2.43142 - 0.00834775\,\lambda^2 + 0.0155627\,\lambda^{-2} - 0.000282533\,\lambda^{-4} + 7.20295 \times 10^{-5}\,\lambda^{-6} - 3.45229 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.13 |
|---|---|
| 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 | |
|---|---|---|---|---|
| BAK1 | Sumita | 1.5725 | 57.5 | |
| BAC1 | Hoya | 1.572497 | 57.488684 | |
| H-BAK8 | CDGM | 1.5725 | 57.486797 | |
| BAK1 | Schott | 1.5725 | 57.54931 | |
| N-BAK1 | Schott | 1.5725 | 57.55 | |
| S-BAL11 | Ohara | 1.572501 | 57.74298 | |
| BAL11 | Ohara | 1.572501 | 57.760854 | |
| BAK50 | Schott | 1.567736 | 57.990411 | |
| BAC6 | Hoya | 1.574441 | 56.357089 | |
| S-BAL14 | Ohara | 1.568832 | 56.363897 |
Similar Glasses (Corning)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| B69-56 | Corning | 1.568797 | 56.044859 | |
| B64-61 | Corning | 1.564005 | 60.964853 | |
| B89-61 | Corning | 1.588998 | 61.218914 | |
| C07-57 | Corning | 1.607504 | 56.610495 | |
| B39-59 | Corning | 1.539505 | 59.712433 | |
| C09-59 | Corning | 1.608756 | 59.036803 | |
| B48-53 | Corning | 1.547753 | 53.492251 | |
| B58-53 | Corning | 1.557511 | 52.533062 | |
| C13-58 | Corning | 1.612693 | 58.570371 | |
| C13-56 | Corning | 1.613498 | 56.417725 |