SF53 by Schott

Obsolete Unknown Environmentally Dangerous

SF53 by Schott is an obsolete optical glass. It transmits from 0.37 to 2.33 µm with an nd of 1.728301 and a Vd of 28.68667. It has medium thermal expansion (CTE of 8.2×10⁻⁶/K), good chemical resistance, moderate relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.370–2.325 µm
Optical Properties
Refractive Index (nd) 1.728301
Abbe Number (Vd) 28.68667
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.56974\,\lambda^2}{\lambda^2 - 0.0120852} + \frac{0.306366\,\lambda^2}{\lambda^2 - 0.0541694} + \frac{1.03021\,\lambda^2}{\lambda^2 - 117.354}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.2
TCE 100/300°C (10-6/K) 9.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.68 \times 10^{-6} + 2(1.71 \times 10^{-8})\,\Delta T + 3(-3.42 \times 10^{-11})\,\Delta T^2 + \frac{1.4 \times 10^{-6} + 2(9.61 \times 10^{-10})\,\Delta T}{\lambda - 0.261}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.45
Relative Cost 3.03
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance 1
Acid Resistance 2
Alkali Resistance 2
Phosphate Resistance 3
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FDS2 Hoya 1.7283 28.674457
PBH10 Ohara 1.728249 28.4623
S-TIH10 Ohara 1.72825 28.460599
D28-28 Corning 1.728304 28.397796
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-ZF4AGT CDGM 1.72825 28.318797
H-ZF4A CDGM 1.72825 28.318797
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-SF10 Schott 1.72828 28.53
SF10 Schott 1.72825 28.41
P-SF69 Schott 1.7225 29.23
SF18 Schott 1.72151 29.245495
SF3 Schott 1.74 28.2
SF1 Schott 1.71736 29.51
N-SF1 Schott 1.71736 29.62
SF54 Schott 1.7408 28.090813
SF13 Schott 1.740771 27.59998
SF63 Schott 1.7484 27.713565
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