FSL3 by Ohara

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.300–0.700 µm
Optical Properties
Refractive Index (nd) 1.464499
Abbe Number (Vd) 65.938855
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{2.12057 - 0.00894372\,\lambda^2 + 0.00902424\,\lambda^{-2} + 0.000137863\,\lambda^{-4} - 8.27504 \times 10^{-7}\,\lambda^{-6} + 2.67404 \times 10^{-8}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.9
TCE 100/300°C (10-6/K) 9.3
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.652 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.25
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 52
Alkali Resistance —
Phosphate Resistance 2
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
FK3 Schott 1.4645 65.77
FC3 Hoya 1.464502 65.767612
A63-65 Corning 1.464501 65.763211
FC1 Hoya 1.470787 66.706713
H-QK1 CDGM 1.47047 66.876032
INFRASIL Heraeus 1.458563 67.664757
HOMOSIL Heraeus 1.458563 67.664757
HOQ Heraeus 1.458563 67.664757
HERASIL Heraeus 1.458563 67.664757
C79-80 Corning 1.458467 67.795012
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
SK-1300 Ohara 1.458567 67.837244
SK-1310 Ohara 1.458663 67.854535
BSL3 Ohara 1.498308 65.026785
FSL5 Ohara 1.48749 70.21026
S-FSL5 Ohara 1.48749 70.236252
BSL21 Ohara 1.503779 66.814545
S-FSL5Y Ohara 1.48749 70.354425
BSL1 Ohara 1.510091 63.635037
BSL7Y Ohara 1.51633 64.243778
BSL7 Ohara 1.51633 64.150145
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