D20-50 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) | 1.720003 |
|---|---|
| Abbe Number (Vd) | 50.312121 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.28 — 1.8 µm |
$$n(\lambda) = \sqrt{2.8956 - 0.0125463\,\lambda^2 + 0.0223846\,\lambda^{-2} + 0.000188626\,\lambda^{-4} + 3.29758 \times 10^{-5}\,\lambda^{-6} - 1.10085 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.2 |
| 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) | 3.94 |
|---|---|
| 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)
Similar Glasses (Corning)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| D34-51 | Corning | 1.733513 | 51.387663 | |
| D17-48 | Corning | 1.717011 | 47.998493 | |
| D13-54 | Corning | 1.713 | 53.843096 | |
| C90-50 | Corning | 1.689009 | 49.625392 | |
| C90-55 | Corning | 1.691008 | 54.793839 | |
| C97-55 | Corning | 1.697005 | 55.409848 | |
| D44-45 | Corning | 1.744001 | 44.818533 | |
| C97-56 | Corning | 1.697 | 56.222926 | |
| C67-48 | Corning | 1.666698 | 48.434395 | |
| C70-47 | Corning | 1.670005 | 47.112037 |