C39-56 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) | 1.638505 |
|---|---|
| Abbe Number (Vd) | 55.504447 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.28 — 1.8 µm |
$$n(\lambda) = \sqrt{2.63622 - 0.0091808\,\lambda^2 + 0.0171711\,\lambda^{-2} + 0.000184909\,\lambda^{-4} + 1.62921 \times 10^{-5}\,\lambda^{-6} - 5.80743 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.7 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.08 |
|---|---|
| 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 | |
|---|---|---|---|---|
| K-SK18 | Sumita | 1.63854 | 55.5 | |
| SK18RH | Sumita | 1.63854 | 55.5 | |
| K-SK18RH | Sumita | 1.63854 | 55.5 | |
| SK18 | Sumita | 1.63854 | 55.5 | |
| BACD18 | Hoya | 1.63854 | 55.45 | |
| H-ZK11 | CDGM | 1.63854 | 55.446553 | |
| SK18A | Schott | 1.63854 | 55.423596 | |
| N-SK18 | Schott | 1.63854 | 55.423596 | |
| BSM18 | Ohara | 1.638539 | 55.384768 | |
| S-BSM18 | Ohara | 1.638539 | 55.380028 |
Similar Glasses (Corning)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| C51-56 | Corning | 1.651124 | 55.895803 | |
| C23-57 | Corning | 1.622801 | 56.922436 | |
| C42-58 | Corning | 1.642502 | 58.061633 | |
| C17-55 | Corning | 1.617605 | 55.123455 | |
| C57-57 | Corning | 1.657503 | 57.198059 | |
| C23-53 | Corning | 1.622502 | 53.14721 | |
| C23-58 | Corning | 1.623004 | 58.102071 | |
| C52-58 | Corning | 1.6516 | 58.511488 | |
| C13-56 | Corning | 1.613498 | 56.417725 | |
| C07-57 | Corning | 1.607504 | 56.610495 |