Optical constants of SUMITA - BaF (Barium flint)
K-BaF9
Wavelength:
µm
(0.350–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.6455399-0.010990833λ^{2}+0.018955207λ^{-2}+0.00040800743λ^{-4}+9.934634\text{×}10^{-06}λ^{-6}+9.3197902\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -4.02e-07 1.44e-08 -1.41e-10 4.98e-07 5.81e-10 0.243
nd: 1.64328
Vd: 47.8
glass_code: 643478
density: 3.44 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.2e-06 K-1
dPgF: 0.0012
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