SK15 by Sumita

Obsolete Very Rare Environmentally Dangerous

SK15 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.29 to 2.00 µm with an nd of 1.62299 and a Vd of 58.1. 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: 0.290–2.000 µm
Optical Properties
Refractive Index (nd) 1.62299
Abbe Number (Vd) 58.1
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.59112 - 0.0101598\,\lambda^2 + 0.0148702\,\lambda^{-2} + 0.000503891\,\lambda^{-4} - 4.15525 \times 10^{-5}\,\lambda^{-6} + 2.64513 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 8.0
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
C23-58 Corning 1.623004 58.102071
BACD15 Hoya 1.62299 58.12
H-ZK21 CDGM 1.62299 58.120667
SK15 Schott 1.62299 58.059722
BSM15 Ohara 1.622992 58.143312
D-ZK21-25 CDGM 1.62346 58.115078
S-BSM15 Ohara 1.622992 58.165763
N-SK15 Schott 1.62296 58.02
M-BACD15 Hoya 1.62263 58.17
MP-BACD15 Hoya 1.62263 58.17
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-SK15 Sumita 1.62299 58.1
SK10 Sumita 1.6228 56.9
SK4 Sumita 1.61272 58.6
K-SK4 Sumita 1.61272 58.6
K-PSK200 Sumita 1.61305 59.0
K-VC79 Sumita 1.61035 57.9
VC79 Sumita 1.6097 57.8
K-PSK200(M) Sumita 1.61083 58.9
SK3 Sumita 1.60881 58.9
SK16 Sumita 1.62041 60.3
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