Optical constants of SUMITA - BaF (Barium flint)
K-BaF8
Wavelength:
µm
(0.340–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.5830562-0.01131971λ^{2}+0.018817464λ^{-2}+0.00027063309λ^{-4}+2.1527561\text{×}10^{-05}λ^{-6}+7.7761941\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 7.3e-07 1.78e-08 -2.34e-10 5.81e-07 1.81e-11 0.234
nd: 1.62374
Vd: 47.1
glass_code: 624471
density: 3.02 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.8e-06 K-1
dPgF: 0.0001
climatic_resistance: 1.0
acid_resistance: 2.0
References
SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book