Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn22
Wavelength:
µm
(0.350 – 2.000)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=3.477103-0.01493764λ^{2}+0.040192699λ^{-2}+0.0018404932λ^{-4}-0.00010009344λ^{-6}+1.4346776\text{×}10^{-05}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false λ_is_vacuum: false temperature: 20.0 °C coefficients_of_thermal_dispersion: 2.02e-06 1.36e-08 -2.8e-10 8.48e-07 8.18e-10 0.256 n_d: 1.89800 V_d: 34.0 glass_code: 898340 density: 4.92 g/cm3 coefficient_of_thermal_expansion_1: 5.7e-06 K-1 coefficient_of_thermal_expansion_2: 7.9e-06 K-1 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