Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn10
Wavelength:
µm
(0.340–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.2128137-0.015587464λ^{2}+0.028249299λ^{-2}+0.00086439607λ^{-4}-2.9175496\text{×}10^{-05}λ^{-6}+2.9912535\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.02e-06 1.34e-08 -1.66e-10 6.41e-07 6.88e-10 0.194
nd: 1.81550
Vd: 44.4
glass_code: 816444
density: 4.8 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.2e-06 K-1
dPgF: -0.0105
climatic_resistance: 1.0
acid_resistance: 2.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book