F9 by Sumita

Obsolete Very Rare Environmentally Dangerous

F9 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 1.62045 and a Vd of 38.0. 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: 0.320–2.000 µm
Optical Properties
Refractive Index (nd) 1.62045
Abbe Number (Vd) 38.0
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.55985 - 0.00956257\,\lambda^2 + 0.0218134\,\lambda^{-2} + 0.000722991\,\lambda^{-4} - 7.71978 \times 10^{-6}\,\lambda^{-6} + 3.40222 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.1
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) 3.56
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 2
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
F9 Schott 1.620451 38.080601
F9 Hoya 1.620446 38.090002
PBM9 Ohara 1.620451 38.119955
BASF1 Schott 1.626061 38.962861
H-BAF8 CDGM 1.62604 39.071631
BAFD1 Hoya 1.626057 39.085725
F3 Schott 1.612931 37.038954
S-TIM3 Ohara 1.612929 37.005342
H-F2 CDGM 1.61293 37.004441
PBM3 Ohara 1.612929 36.994096
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
BASF1 Sumita 1.62606 39.1
F4 Sumita 1.61659 36.6
F3 Sumita 1.61293 36.9
F2 Sumita 1.62004 36.3
F5 Sumita 1.60342 38.0
F1 Sumita 1.62588 35.6
BASF3 Sumita 1.60717 40.2
F6 Sumita 1.63636 35.4
F8 Sumita 1.59551 39.2
K-BaSF4 Sumita 1.65128 38.3
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