Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn6
Wavelength:
µm
(0.310–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.1766024-0.015214563λ^{2}+0.026674405λ^{-2}+0.00074674513λ^{-4}-2.63508\text{×}10^{-05}λ^{-6}+2.7514981\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.72e-06 1.48e-08 -1.94e-10 5.94e-07 9.48e-10 0.205
nd: 1.80400
Vd: 46.6
glass_code: 804466
density: 4.72 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.9e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.4e-06 K-1
dPgF: -0.0098
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