Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn3
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.1507226-0.012460963λ^{2}+0.029910697λ^{-2}+0.00050733106λ^{-4}+3.6278868\text{×}10^{-05}λ^{-6}-2.5019766\text{×}10^{-08}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.38e-07 3.13e-08 -2.27e-11 6.92e-07 5.55e-10 0.218
nd: 1.79950
Vd: 42.3
glass_code: 800423
density: 4.39 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.9e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8e-06 K-1
dPgF: -0.006
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