SSK5 by Sumita

Obsolete Very Rare Environmentally Dangerous

SSK5 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 1.65844 and a Vd of 50.8. 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: 0.320–2.000 µm
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 Compare
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
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
BAFN3 Sumita 1.66422 49.2
K-BaFn3 Sumita 1.66422 49.2
LAKN7 Sumita 1.67 51.7
K-LaKn7 Sumita 1.67 51.7
SSKN1 Sumita 1.6485 53.0
LAKN11 Sumita 1.6583 53.4
K-LaKn11 Sumita 1.6583 53.4
BAF11 Sumita 1.66672 48.4
LAKN8 Sumita 1.678 50.7
K-LCV93 Sumita 1.6652 47.3
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