Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn16
Wavelength:
µm
(0.320–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.124535-0.014985014λ^{2}+0.024795878λ^{-2}+0.00096271556λ^{-4}-6.4587038\text{×}10^{-05}λ^{-6}+4.6162437\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.27e-06 1.53e-08 -2.61e-10 5.42e-07 5.61e-10 0.206
nd: 1.78830
Vd: 47.4
glass_code: 788474
density: 4.76 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.4e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.2e-06 K-1
dPgF: -0.0104
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