Optical constants of SUMITA - LaF (Lanthanum flint)
K-LaFn5
Wavelength:
µm
(0.330–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.9746618-0.015490396λ^{2}+0.021676376λ^{-2}+0.0007907947λ^{-4}-3.5069226\text{×}10^{-05}λ^{-6}+2.1235401\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.26e-06 2.18e-08 -2.34e-10 5.21e-07 6.65e-10 0.203
nd: 1.74300
Vd: 49.2
glass_code: 743492
density: 4.05 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.1e-06 K-1
dPgF: -0.0084
climatic_resistance: 1.0
acid_resistance: 4.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book