Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn7
Wavelength:
µm
(0.300–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.0728806-0.014815338λ^{2}+0.024064142λ^{-2}+0.00049961497λ^{-4}+1.2852807\text{×}10^{-06}λ^{-6}+5.2262074\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.19e-06 1.73e-08 -1.56e-10 5.97e-07 3.56e-10 0.161 nd: 1.77250 Vd: 49.6 glass_code: 773496 density: 4.44 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 5.7e-06 K-1 - temperature_range: 20 300 °C coefficient: 7.2e-06 K-1 dPgF: -0.0077 climatic_resistance: 1.0 acid_resistance: 3.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book