N-SF10 by Schott

Preferred Unknown Environmentally Friendly

N-SF10 by Schott is a preferred optical glass. It transmits from 0.38 to 2.50 µm with an nd of 1.72828 and a Vd of 28.53. It has medium thermal expansion (CTE of 9.4×10⁻⁶/K), excellent chemical resistance, and low relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.38–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.38–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.380–2.500 µm
Optical Properties
Refractive Index (nd) 1.72828
Abbe Number (Vd) 28.53
Dispersion Formula Sellmeier
Wavelength Range 0.38 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.62154\,\lambda^2}{\lambda^2 - 0.0122241} + \frac{0.256288\,\lambda^2}{\lambda^2 - 0.0595737} + \frac{1.64448\,\lambda^2}{\lambda^2 - 147.469}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.4
TCE 100/300°C (10-6/K) 10.8
Thermal Conductivity (W/mK) 0.96
Heat Capacity (J/gK) 0.74
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.68 \times 10^{-6} + 2(7.41 \times 10^{-9})\,\Delta T + 3(-1.89 \times 10^{-11})\,\Delta T^2 + \frac{9.49 \times 10^{-7} + 2(1.42 \times 10^{-9})\,\Delta T}{\lambda - 0.279}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.05
Relative Cost 1.6
Mechanical Properties
Young's Modulus (GPa) 87.0
Poisson's Ratio 0.25
Knoop Hardness (kgf/mm²) 540.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance 0
Acid Resistance 1
Alkali Resistance 1
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
PBH10 Ohara 1.728249 28.4623
S-TIH10 Ohara 1.72825 28.460599
D28-28 Corning 1.728304 28.397796
FDS2 Hoya 1.7283 28.674457
ZF4 CDGM 1.728251 28.3239
E-FD10 Hoya 1.72825 28.32
E-FD10L Hoya 1.72825 28.32
FD10 Hoya 1.728252 28.319563
H-ZF4A CDGM 1.72825 28.318797
H-ZF4AGT CDGM 1.72825 28.318797
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
SF10 Schott 1.72825 28.41
SF53 Schott 1.728301 28.68667
P-SF69 Schott 1.7225 29.23
SF18 Schott 1.72151 29.245495
SF3 Schott 1.74 28.2
SF54 Schott 1.7408 28.090813
SF1 Schott 1.71736 29.51
N-SF1 Schott 1.71736 29.62
SF13 Schott 1.740771 27.59998
SF63 Schott 1.7484 27.713565
Compare Glasses
    Compare Selected