SF66 by Schott

Obsolete Unknown Environmentally Dangerous

SF66 by Schott is an obsolete optical glass. It transmits from 0.39 to 2.50 µm with an nd of 1.92286 and a Vd of 20.88. It has medium thermal expansion (CTE of 9.01×10⁻⁶/K), below average chemical resistance, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.39–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.39–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.390–2.500 µm
Optical Properties
Refractive Index (nd) 1.92286
Abbe Number (Vd) 20.88
Dispersion Formula Sellmeier
Wavelength Range 0.39 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{2.07842\,\lambda^2}{\lambda^2 - 0.0180875} + \frac{0.40712\,\lambda^2}{\lambda^2 - 0.0679494} + \frac{1.76711\,\lambda^2}{\lambda^2 - 215.266}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.01
TCE 100/300°C (10-6/K) 11.48
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
Physical Properties
Density (g/cm³) 6.025
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance 5
Acid Resistance 53
Alkali Resistance 2
Phosphate Resistance 4
Notes

old, was replaced by N-SF66

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
MP-FDS1 Hoya 1.92286 20.88
E-FDS1-W Hoya 1.92286 20.88
E-FDS1 Hoya 1.92286 20.88
M-FDS1 Hoya 1.92286 20.88
H-ZF62 CDGM 1.92286 20.879915
H-ZF62GT CDGM 1.92286 20.879915
FDS1 Hoya 1.922859 20.883457
PBH21 Ohara 1.922861 20.884172
PBH71 Ohara 1.922864 21.288699
PBH72 Ohara 1.915356 21.171926
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-SF66 Schott 1.92286 20.88
REALVIEW_1.9_LIGHTWEIGHT Schott 1.922002 21.44
SF58 Schott 1.917613 21.51112
P-SF67 Schott 1.9068 21.4
SF59 Schott 1.952497 20.363706
N-LASF55 Schott 1.9538 30.56
SFL57 Schott 1.84666 23.62
SF57HHT Schott 1.84666 23.779912
N-SF57 Schott 1.84666 23.78
N-SF57HTultra Schott 1.84666 23.78
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