SF5 by Sumita

Obsolete Very Rare Environmentally Dangerous

SF5 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 1.6727 and a Vd of 32.2. It has excellent 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) 1.6727
Abbe Number (Vd) 32.2
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.71187 - 0.00974179\,\lambda^2 + 0.0268562\,\lambda^{-2} + 0.00154793\,\lambda^{-4} - 8.54254 \times 10^{-5}\,\lambda^{-6} + 9.99587 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.3
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) 4.08
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SF5 Schott 1.6727 32.21
ZF2 CDGM 1.672707 32.180986
FD5 Hoya 1.672701 32.173263
H-ZF2 CDGM 1.6727 32.171186
E-FD5 Hoya 1.6727 32.17
N-SF5 Schott 1.67271 32.25
PBM25 Ohara 1.6727 32.101636
S-TIM25 Ohara 1.6727 32.099206
C72-32 Corning 1.672698 32.31788
SF19 Schott 1.6668 33.005581
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
SF19 Sumita 1.6668 33.1
SF8 Sumita 1.68893 31.2
K-SFLD8W Sumita 1.6891 31.2
K-SFLD8 Sumita 1.68893 31.1
K-PSFn166 Sumita 1.663 34.4
K-CD45(M) Sumita 1.68673 34.1
K-CD300(M) Sumita 1.68558 29.9
K-PSFn166(M) Sumita 1.65858 34.4
SF9 Sumita 1.65446 33.8
CD45 Sumita 1.6932 33.7
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