SSK2 by Sumita

Obsolete Very Rare Environmentally Dangerous

SSK2 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.32 to 2.00 µm with an nd of 1.6223 and a Vd of 53.1. It has average chemical resistance and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.27–2.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.27–2.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.320–2.000 µm
Optical Properties
Refractive Index (nd) 1.6223
Abbe Number (Vd) 53.1
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.58387 - 0.00933743\,\lambda^2 + 0.0166624\,\lambda^{-2} + 0.000356908\,\lambda^{-4} - 4.73008 \times 10^{-6}\,\lambda^{-6} + 8.45423 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
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) 3.67
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BACED2 Hoya 1.6223 53.11226
C23-53 Corning 1.622502 53.14721
SSK2 Schott 1.622301 53.154887
S-BSM22 Ohara 1.622296 53.169067
H-ZBAF1 CDGM 1.6223 53.170869
BSM22 Ohara 1.622296 53.186644
N-SSK2 Schott 1.62229 53.27
SSK50 Schott 1.617954 52.609086
SSK1 Schott 1.617201 53.912403
H-ZK20 CDGM 1.6172 53.913743
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-SSK1 Sumita 1.6172 54.0
SSK1 Sumita 1.6172 54.0
K-SSK4 Sumita 1.61765 55.1
SSK4 Sumita 1.61765 55.1
SSK3 Sumita 1.61484 51.1
K-SSK3 Sumita 1.61484 51.1
SK9 Sumita 1.61405 55.1
SK18RH Sumita 1.63854 55.5
K-SK18 Sumita 1.63854 55.5
K-SK18RH Sumita 1.63854 55.5
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