Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn17
Wavelength:
µm
(0.300–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.4434117-0.015474743λ^{2}+0.033695975λ^{-2}+0.0012878574λ^{-4}-4.547423\text{×}10^{-05}λ^{-6}+3.867959\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 1.16e-06 1.35e-08 -2.1e-10 7.19e-07 4.1e-10 0.207 nd: 1.88300 Vd: 40.8 glass_code: 883408 density: 5.54 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.3e-06 K-1 - temperature_range: 20 300 °C coefficient: 7.9e-06 K-1 dPgF: -0.0095 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