Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn14
Wavelength:
µm
(0.340 – 2.000)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=3.2643191-0.016265121λ^{2}+0.03202838λ^{-2}+0.0015271854λ^{-4}-4.7775544\text{×}10^{-05}λ^{-6}+5.7345907\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false λ_is_vacuum: false temperature: 20.0 °C coefficients_of_thermal_dispersion: 2.04e-06 1.48e-08 -2.22e-10 7.19e-07 7.99e-10 0.248 n_d: 1.83400 V_d: 37.3 glass_code: 834373 density: 4.18 g/cm3 coefficient_of_thermal_expansion_1: 5.8e-06 K-1 coefficient_of_thermal_expansion_2: 7.5e-06 K-1 ΔP_gF: -0.0024 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