SF2 by Sumita

Obsolete Very Rare Environmentally Dangerous
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: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.64769
Abbe Number (Vd) 33.9
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.63576 - 0.008837\,\lambda^2 + 0.0255307\,\lambda^{-2} + 0.00100853\,\lambda^{-4} - 2.72112 \times 10^{-5}\,\lambda^{-6} + 6.10643 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.6
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) 3.84
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
H-ZF1A CDGM 1.64769 33.887993
SF2 Schott 1.64769 33.85
C48-34 Corning 1.647992 33.943274
H-ZF1 CDGM 1.64769 33.840317
E-FD2 Hoya 1.64769 33.84
FD2 Hoya 1.647693 33.836872
ZF1 CDGM 1.647693 33.836872
N-SF2 Schott 1.64769 33.82
PBM22 Ohara 1.647689 33.802937
SF12 Schott 1.64831 33.841187
Similar Glasses (Sumita)
Glass Manufacturer nd Vd
SF12 Sumita 1.64831 33.8
SF9 Sumita 1.65446 33.8
SF7 Sumita 1.6398 34.6
K-PSFn166(M) Sumita 1.65858 34.4
K-PSFn166 Sumita 1.663 34.4
F6 Sumita 1.63636 35.4
SF19 Sumita 1.6668 33.1
K-PG395(M) Sumita 1.65296 36.8
BASF2 Sumita 1.66446 35.9
K-PG395 Sumita 1.658 36.9
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