F6 by Schott

Obsolete Unknown Environmentally Dangerous

F6 by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.636359 and a Vd of 35.341176. It has medium thermal expansion (CTE of 8.5×10⁻⁶/K), good chemical resistance, low relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.636359
Abbe Number (Vd) 35.341176
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.3864\,\lambda^2}{\lambda^2 - 0.010312} + \frac{0.216317\,\lambda^2}{\lambda^2 - 0.0482392} + \frac{0.920243\,\lambda^2}{\lambda^2 - 111.029}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.5
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[8.99 \times 10^{-7} + 2(1.59 \times 10^{-8})\,\Delta T + 3(-2.94 \times 10^{-11})\,\Delta T^2 + \frac{9.98 \times 10^{-7} + 2(1.01 \times 10^{-9})\,\Delta T}{\lambda - 0.245}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.76
Relative Cost 1.73
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance 1
Acid Resistance 1
Alkali Resistance 2
Phosphate Resistance 2
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
F6 Hoya 1.636356 35.340304
C37-35 Corning 1.636493 35.322642
PBM6 Ohara 1.636358 35.376536
F7 CDGM 1.636365 35.386204
S-TIM6 Ohara 1.636358 35.391923
F6 Sumita 1.63636 35.4
SF7 Sumita 1.6398 34.6
E-FD7 Hoya 1.6398 34.57
FD7 Hoya 1.639803 34.568909
PBM27 Ohara 1.639799 34.477127
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
F1 Schott 1.625882 35.700495
F7 Schott 1.625361 35.561194
SF16 Schott 1.646112 34.049815
F13 Schott 1.622372 36.043399
SF2 Schott 1.64769 33.85
N-SF2 Schott 1.64769 33.82
SF12 Schott 1.64831 33.841187
FN11 Schott 1.620962 36.179463
F2 Schott 1.62004 36.37
F2HTi Schott 1.62004 36.37
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