Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn23
Wavelength:
µm
(0.350 – 2.000)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=3.527437-0.014640706λ^{2}+0.040393831λ^{-2}+0.0015495078λ^{-4}-4.5667249\text{×}10^{-05}λ^{-6}+9.0971269\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false λ_is_vacuum: false temperature: 20.0 °C coefficients_of_thermal_dispersion: 1.83e-08 1.49e-08 -2.69e-10 8.28e-07 7.87e-10 0.248 n_d: 1.91100 V_d: 35.2 glass_code: 911352 density: 4.9 g/cm3 coefficient_of_thermal_expansion_1: 6.9e-06 K-1 coefficient_of_thermal_expansion_2: 8.8e-06 K-1 ΔP_gF: -0.0019 climatic_resistance: 1.0 acid_resistance: 1.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book