Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn9
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.2184433-0.014906369λ^{2}+0.02692619λ^{-2}+0.00087409748λ^{-4}-4.0331281\text{×}10^{-05}λ^{-6}+3.1677745\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 20.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 1.34e-06 2.13e-08 -1.52e-10 5.8e-07 6.95e-10 0.204 nd: 1.81600 Vd: 46.7 glass_code: 816467 density: 4.96 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 6.3e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 7.6e-06 K-1 dPgF: -0.0086 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