SSK5 by Sumita
Obsolete
Very Rare
Environmentally Dangerous
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) | 1.65844 |
|---|---|
| Abbe Number (Vd) | 50.8 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.69345 - 0.00848497\,\lambda^2 + 0.0204959\,\lambda^{-2} - 0.000125999\,\lambda^{-4} + 7.43837 \times 10^{-5}\,\lambda^{-6} - 3.1333 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 8.6 |
| 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) | 3.87 |
|---|---|
| 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 | |
|---|---|---|---|---|
| H-ZBAF50 | CDGM | 1.65844 | 50.852265 | |
| BACED5 | Hoya | 1.65844 | 50.86 | |
| BSM25 | Ohara | 1.658441 | 50.861723 | |
| S-BSM25 | Ohara | 1.658441 | 50.877554 | |
| N-SSK5 | Schott | 1.65844 | 50.88 | |
| SSKN5 | Schott | 1.65844 | 50.882921 | |
| C58-51 | Corning | 1.658503 | 51.012014 | |
| H-ZBAF3 | CDGM | 1.65691 | 51.12138 | |
| LACL4 | Hoya | 1.669603 | 51.65903 | |
| H-LAK67 | CDGM | 1.67 | 51.738482 |