N-SF19 by Schott

Obsolete Unknown Environmentally Friendly

N-SF19 by Schott is an obsolete optical glass. It transmits from 0.37 to 2.50 µm with an nd of 1.66679 and a Vd of 33.12. It has medium thermal expansion (CTE of 7.2×10⁻⁶/K) and excellent chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.37–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.37–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.370–2.500 µm
Optical Properties
Refractive Index (nd) 1.66679
Abbe Number (Vd) 33.12
Dispersion Formula Sellmeier
Wavelength Range 0.37 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.52005\,\lambda^2}{\lambda^2 - 0.0109614} + \frac{0.175739\,\lambda^2}{\lambda^2 - 0.0593248} + \frac{1.43623\,\lambda^2}{\lambda^2 - 126.795}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.2
TCE 100/300°C (10-6/K) 8.3
Thermal Conductivity (W/mK) 1.02
Heat Capacity (J/gK) 0.75
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.32 \times 10^{-6} + 2(1.22 \times 10^{-8})\,\Delta T + 3(-1.36 \times 10^{-11})\,\Delta T^2 + \frac{7.64 \times 10^{-7} + 2(1.09 \times 10^{-9})\,\Delta T}{\lambda - 0.279}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.9
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) 88.0
Poisson's Ratio 0.23
Knoop Hardness (kgf/mm²) 630.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance 0
Acid Resistance 1
Alkali Resistance 1
Phosphate Resistance 1
Notes

inquiry glass

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SF19 Sumita 1.6668 33.1
C67-33 Corning 1.666997 33.114648
FD19 Hoya 1.666797 33.059707
S-TIM39 Ohara 1.6668 33.054985
H-ZF39 CDGM 1.6668 33.053728
PBM39 Ohara 1.666799 33.046816
C72-32 Corning 1.672698 32.31788
SF5 Sumita 1.6727 32.2
ZF2 CDGM 1.672707 32.180986
FD5 Hoya 1.672701 32.173263
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
SF19 Schott 1.6668 33.005581
N-SF5 Schott 1.67271 32.25
SF5 Schott 1.6727 32.21
SF9 Schott 1.654461 33.651384
SF12 Schott 1.64831 33.841187
N-SF2 Schott 1.64769 33.82
SF2 Schott 1.64769 33.85
BASF2 Schott 1.66446 35.829357
N-BASF2 Schott 1.66446 36.0
SF16 Schott 1.646112 34.049815
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