SFLD11 by Sumita

Obsolete Very Rare Environmentally Dangerous

SFLD11 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.37 to 2.00 µm with an nd of 1.78472 and a Vd of 25.9. 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: 0.370–2.000 µm
Optical Properties
Refractive Index (nd) 1.78472
Abbe Number (Vd) 25.9
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{3.05942 - 0.0151713\,\lambda^2 + 0.0363963\,\lambda^{-2} + 0.00369024\,\lambda^{-4} - 0.000317506\,\lambda^{-6} + 3.42723 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 10.5
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) 3.3
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
D85-26 Corning 1.784994 25.902085
D85-25 Corning 1.784752 25.799504
SF11 Schott 1.78472 25.76
ZF13 CDGM 1.784724 25.754051
FDS3 Hoya 1.7847 26.057653
ZF51 CDGM 1.784701 26.075871
SFL56 Schott 1.7847 26.078312
H-ZF13GT CDGM 1.78472 25.720045
H-ZF13 CDGM 1.78472 25.720045
FD110 Hoya 1.78472 25.72
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-SFLD11 Sumita 1.78472 25.9
SF11 Sumita 1.78472 25.7
SF11W Sumita 1.78472 25.7
SFS3 Sumita 1.7847 26.2
K-CD180(M) Sumita 1.79912 24.7
K-SFLD66 Sumita 1.79925 24.6
SFLD66 Sumita 1.79925 24.6
SF6 Sumita 1.80518 25.5
SF6W Sumita 1.80518 25.5
K-SFLD6 Sumita 1.80518 25.4
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