SF14 by Sumita

Obsolete Very Rare Environmentally Dangerous

SF14 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.38 to 2.00 µm with an nd of 1.76182 and a Vd of 26.5. 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: 0.380–2.000 µm
Optical Properties
Refractive Index (nd) 1.76182
Abbe Number (Vd) 26.5
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.9839 - 0.0123665\,\lambda^2 + 0.0351311\,\lambda^{-2} + 0.00320717\,\lambda^{-4} - 0.000261534\,\lambda^{-6} + 2.91274 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 8.2
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) 4.56
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 1
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-TIH14 Ohara 1.761821 26.517885
TIH14 Ohara 1.761821 26.517966
SF14 Schott 1.76182 26.53
N-SF14 Schott 1.76182 26.53
FD14 Hoya 1.761823 26.552048
PBH14 Ohara 1.761819 26.553651
PBH14W Ohara 1.761819 26.553651
ZF12 CDGM 1.761822 26.555686
H-ZF12 CDGM 1.76182 26.607986
FD140 Hoya 1.76182 26.61
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-SFLD14 Sumita 1.76182 26.5
SF4 Sumita 1.7552 27.5
SF4W Sumita 1.7552 27.5
K-SFLD4 Sumita 1.7552 27.5
SFN4 Sumita 1.7506 27.8
SF13 Sumita 1.74077 27.7
SFS3 Sumita 1.7847 26.2
K-SFLD11 Sumita 1.78472 25.9
SFLD11 Sumita 1.78472 25.9
SF11W Sumita 1.78472 25.7
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