SSK9 by Sumita

Obsolete Very Rare Environmentally Dangerous

SSK9 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.34 to 2.00 µm with an nd of 1.62012 and a Vd of 49.8. 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: 0.340–2.000 µm
Optical Properties
Refractive Index (nd) 1.62012
Abbe Number (Vd) 49.8
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.57322 - 0.00908001\,\lambda^2 + 0.0180428\,\lambda^{-2} + 0.000236865\,\lambda^{-4} + 1.75983 \times 10^{-5}\,\lambda^{-6} + 3.41729 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.8
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) 3.29
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance —
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BACED9 Hoya 1.620119 49.823001
N-SSK8 Schott 1.61773 49.83
S-BSM28 Ohara 1.617722 49.815052
SSKN8 Schott 1.61772 49.771451
BSM28 Ohara 1.617722 49.83232
N-SSK20 Schott 1.62568 50.2
BACED3 Hoya 1.614838 51.1513
SSK3 Schott 1.614837 51.1603
BSM23 Ohara 1.614839 51.172377
BAF5 Hoya 1.607292 49.336899
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-SSK9 Sumita 1.62012 49.8
SSK3 Sumita 1.61484 51.1
K-SSK3 Sumita 1.61484 51.1
BAF5 Sumita 1.60729 49.3
K-SKLD310 Sumita 1.6042 48.9
K-SKLD310(M) Sumita 1.60132 49.0
K-BaF8 Sumita 1.62374 47.1
BAF8 Sumita 1.62374 47.1
SSK2 Sumita 1.6223 53.1
K-BaF9 Sumita 1.64328 47.8
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