Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn1
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.1704478-0.012872124λ^{2}+0.030711328λ^{-2}+0.00091467552λ^{-4}-4.2179151\text{×}10^{-05}λ^{-6}+5.885503\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 20.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 6.7e-07 1.3e-08 -3.16e-10 7.17e-07 7.77e-10 0.224 nd: 1.80610 Vd: 40.7 glass_code: 806407 density: 4.17 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.7e-06 K-1 - temperature_range: 20 300 °C coefficient: 8e-06 K-1 dPgF: -0.0087 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