SF6W by Sumita

Obsolete Very Rare Environmentally Dangerous

SF6W by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.36 to 2.00 µm with an nd of 1.80518 and a Vd of 25.5. It has good 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: 0.360–2.000 µm
Optical Properties
Refractive Index (nd) 1.80518
Abbe Number (Vd) 25.5
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{3.11997 - 0.011028\,\lambda^2 + 0.0410534\,\lambda^{-2} + 0.00324489\,\lambda^{-4} - 0.000227095\,\lambda^{-6} + 2.6893 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 8.8
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) 5.2
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
E05-25 Corning 1.805093 25.506125
ZF7LTT CDGM 1.80519 25.471232
ZF7LGT CDGM 1.80519 25.471232
ZF7L CDGM 1.80519 25.471232
FD6 Hoya 1.805184 25.465194
FD60-W Hoya 1.80518 25.46
FD60 Hoya 1.80518 25.46
H-ZF7LAGT CDGM 1.80518 25.456256
H-ZF7LA CDGM 1.80518 25.456256
PBH6 Ohara 1.805177 25.435012
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
SF6 Sumita 1.80518 25.5
K-SFLD6 Sumita 1.80518 25.4
SFLD6 Sumita 1.80518 25.4
SFLD60 Sumita 1.80645 24.4
K-CD180 Sumita 1.80645 24.4
K-CD180(M) Sumita 1.79912 24.7
SFLD66 Sumita 1.79925 24.6
K-SFLD66 Sumita 1.79925 24.6
SFLD20 Sumita 1.81786 23.7
SF11W Sumita 1.78472 25.7
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