Optical constants of SUMITA - LaF (Lanthanum flint)
K-LaFn11
Wavelength:
µm
(0.340–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.8917009-0.011920903λ^{2}+0.022558933λ^{-2}+0.00079204231λ^{-4}-4.0820426\text{×}10^{-05}λ^{-6}+4.1373045\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -5.4e-07 2.18e-08 -2.46e-10 5.35e-07 -3.35e-10 0.243
nd: 1.72013
Vd: 46.0
glass_code: 720460
density: 3.88 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.2e-06 K-1
dPgF: -0.0028
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