Optical constants of SUMITA - SK (Dense crown)
K-SK4
Wavelength:
µm
(0.280–2.000)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.5587726-0.0098095616λ^{2}+0.014840563λ^{-2}+0.0003193166λ^{-4}-1.016436\text{×}10^{-05}λ^{-6}+6.6518794\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 20.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 4.04e-07 1.86e-08 -3.68e-10 4.13e-07 4.69e-10 0.197 nd: 1.61272 Vd: 58.6 glass_code: 613586 density: 3.58 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 6.1e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 7.6e-06 K-1 dPgF: -0.0006 climatic_resistance: 3.0 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