F6 by Sumita

Obsolete Very Rare Environmentally Dangerous

F6 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.33 to 2.00 µm with an nd of 1.63636 and a Vd of 35.4. 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: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.63636
Abbe Number (Vd) 35.4
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.60448 - 0.00918928\,\lambda^2 + 0.0235075\,\lambda^{-2} + 0.00105009\,\lambda^{-4} - 3.88784 \times 10^{-5}\,\lambda^{-6} + 5.78692 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.4
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) 3.76
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
S-TIM6 Ohara 1.636358 35.391923
F7 CDGM 1.636365 35.386204
PBM6 Ohara 1.636358 35.376536
F6 Schott 1.636359 35.341176
F6 Hoya 1.636356 35.340304
C37-35 Corning 1.636493 35.322642
E-FD7 Hoya 1.6398 34.57
FD7 Hoya 1.639803 34.568909
PBM27 Ohara 1.639799 34.477127
S-TIM27 Ohara 1.639799 34.466422
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
SF7 Sumita 1.6398 34.6
F1 Sumita 1.62588 35.6
SF2 Sumita 1.64769 33.9
SF12 Sumita 1.64831 33.8
F2 Sumita 1.62004 36.3
K-PG395(M) Sumita 1.65296 36.8
SF9 Sumita 1.65446 33.8
F4 Sumita 1.61659 36.6
K-PSFn166(M) Sumita 1.65858 34.4
K-PG395 Sumita 1.658 36.9
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