Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn2
Wavelength:
µm
(0.320–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=3.1666472-0.014823032λ^{2}+0.030366123λ^{-2}+0.0010942894λ^{-4}-4.2108569\text{×}10^{-05}λ^{-6}+5.7186779\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 5.26e-06 1.83e-08 -3.28e-10 7.62e-07 8.92e-10 0.222
nd: 1.80500
Vd: 39.6
glass_code: 805396
density: 4.13 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7e-06 K-1
dPgF: -0.0066
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