F3 by Sumita

Obsolete Very Rare Environmentally Dangerous

F3 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.31 to 2.00 µm with an nd of 1.61293 and a Vd of 36.9. 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: 0.310–2.000 µm
Optical Properties
Refractive Index (nd) 1.61293
Abbe Number (Vd) 36.9
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.53376 - 0.00839154\,\lambda^2 + 0.0223673\,\lambda^{-2} + 0.000689516\,\lambda^{-4} - 5.53128 \times 10^{-6}\,\lambda^{-6} + 3.45003 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.7
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) 3.54
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
E-F3 Hoya 1.61293 36.96
F3 Hoya 1.612929 36.964515
F2 CDGM 1.612929 36.986002
PBM3 Ohara 1.612929 36.994096
H-F2 CDGM 1.61293 37.004441
S-TIM3 Ohara 1.612929 37.005342
F3 Schott 1.612931 37.038954
H-F3 CDGM 1.61659 36.651688
PBM4 Ohara 1.616588 36.632973
F4 Schott 1.616592 36.628072
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
F4 Sumita 1.61659 36.6
F2 Sumita 1.62004 36.3
F9 Sumita 1.62045 38.0
F5 Sumita 1.60342 38.0
F1 Sumita 1.62588 35.6
BASF1 Sumita 1.62606 39.1
F8 Sumita 1.59551 39.2
BASF3 Sumita 1.60717 40.2
F6 Sumita 1.63636 35.4
SF7 Sumita 1.6398 34.6
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