K-SSK1 by Sumita
Standard
Rare
Environmentally Friendly
K-SSK1 by Sumita is a standard optical glass with a rare melt frequency. It transmits from 0.29 to 2.00 µm with an nd of 1.6172 and a Vd of 54.0. It has medium thermal expansion (CTE of 7.0×10⁻⁶/K) and excellent chemical resistance.
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.61 \times 10^{-6} + 2(1.28 \times 10^{-8})\,\Delta T + 3(-2.14 \times 10^{-10})\,\Delta T^2 + \frac{5.61 \times 10^{-7} + 2(1.14 \times 10^{-9})\,\Delta T}{\lambda - 0.186}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| BSM21 | Ohara | 1.617196 | 54.040511 | |
| BACED1 | Hoya | 1.617203 | 53.945664 | |
| S-BSM21 | Ohara | 1.617195 | 54.062144 | |
| H-ZK20 | CDGM | 1.6172 | 53.913743 | |
| SSK1 | Schott | 1.617201 | 53.912403 | |
| N-SSK2 | Schott | 1.62229 | 53.27 | |
| BSM24 | Ohara | 1.617646 | 55.049782 | |
| BSM9 | Ohara | 1.614047 | 54.971106 | |
| BSM22 | Ohara | 1.622296 | 53.186644 | |
| S-BSM9 | Ohara | 1.614047 | 54.990097 |